Patent Publication Number: US-11376632-B2

Title: Broad frequency filter for powder system

Description:
FIELD 
     The present subject matter relates generally to a filter assembly, or more particularly to a broad frequency filter for a powder system. 
     BACKGROUND 
     Additive manufacturing techniques, processes, or machines refer generally to manufacturing processes wherein successive layers of material(s) are provided on each other to “build-up,” layer-by-layer, a three-dimensional component. The successive layers generally fuse together to form a monolithic component which may have a variety of integral sub-components. Some additive manufacturing techniques, processes, or machines involve an energy source that is used to selectively sinter or melt portions of a layer of powder and involve successively depositing layers of additive powder. In such machines, powder removal and collection for additive manufacturing machines may be required after each machine cycle. Powder removal and/or collection may be difficult for these machines due to a variety of factors including, e.g., a size and configuration of a printed object due to the size and weight. An efficient powder recycling and sieving process is thus needed. 
     BRIEF DESCRIPTION 
     Aspects and advantages of the invention will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the invention. 
     In one exemplary embodiment of the present disclosure, a sieving system for a powder is provided. The sieving system includes a support structure; a filter housing movable relative to the support structure, the filter housing defining an inlet and an outlet, the filter housing comprising a broad frequency filter disposed between the inlet and the outlet, the broad frequency filter configured to restrict a first portion of the powder larger than a predetermined threshold from reaching the outlet; and a powder mass control assembly configured to determine data indicative of a powder mass within a portion of the sieving system and control one or more operations of the sieving system based on the determined data indicative of the powder mass. 
     In another exemplary embodiment of the present disclosure, a sieving system for a powder is provided. The sieving system includes a support structure; and a filter housing movable relative to the support structure, the filter housing defining an inlet and an outlet, the filter housing comprising a broad frequency filter disposed between the inlet and the outlet, the broad frequency filter comprising: a first filter fixed relative to the filter housing, the first filter being substantially rigid; and a second filter coupled within the filter housing adjacent to the first filter, the second filter defining a maximum deflection from the first filter greater than ¼ inch (6.35 mm) and less than 1 inch (25.4 mm). 
     In an exemplary aspect of the present disclosure, a method of reclaiming powder is provided. The method includes recovering an unused portion of a powder from a metal powder processing device; providing the unused portion of the powder to a broad frequency filter; and controlling a mass of the powder on the broad frequency filter. 
     In another exemplary aspect of the present disclosure, a method of reclaiming powder is provided. The method includes recovering an unused portion of a powder from a metal powder processing device; providing the unused portion of the powder to a broad frequency filter of a sieving system; and determining a parameter indicative of a powder mass within a portion of the sieving system. 
     These and other features, aspects and advantages of the present invention will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A full and enabling disclosure of the present invention, including the best mode thereof, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures, in which: 
         FIG. 1  is a perspective view of a powder sieving system utilizing a broad frequency filter that is part of a powder reclamation system in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 2  is an enlarged perspective view of a powder sieving system utilizing a broad frequency filter that is part of a powder reclamation system in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 3  is a perspective view of a powder sieving system, a first motor, and a second motor that are part of a powder reclamation system in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 4  is a perspective view of a powder sieving system utilizing a broad frequency filter that is part of a powder reclamation system in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 5  is a cross-sectional view of a broad frequency filter of a powder sieving system, with enlarged views of a portion of a first filter and a second filter, in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 6  is a cross-sectional view of a broad frequency filter of a powder sieving system, with a second filter moved away from a first filter, in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 7  is a cross-sectional view of a portion of a broad frequency filter of a powder sieving system in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 8  is a side perspective view of a portion of a powder sieving system in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 9  is another side perspective view of a portion of a powder sieving system that is part of a powder reclamation system in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 10  is a perspective view of a portion of a powder sieving system that is part of a powder reclamation system in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 11  is a cross-sectional view of a second portion of a broad frequency filter in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 12  is a perspective view of a powder reclamation system in communication with a metal powder processing device in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 13  is a perspective view of a raw reclaimed powder hopper that is part of a powder reclamation system, with a side cross-sectional view of the raw reclaimed powder hopper, in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 14  is a perspective view of a powder sieving system in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 15  is a side perspective view of a powder sieving system in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 16  is a cross-sectional view of a broad frequency filter having a first filter assembly and a second filter assembly in accordance with another exemplary embodiment of the present disclosure. 
         FIG. 17  is a cross-sectional view of a second portion of a broad frequency filter having a first filter assembly and a second filter assembly in accordance with another exemplary embodiment of the present disclosure. 
         FIG. 18  is a perspective view of a powder reclamation system in communication with a metal powder processing device in accordance with an exemplary embodiment of the present disclosure. 
         FIG. 19  is a perspective view of a powder reclamation system in communication with a first metal powder processing device and a second metal powder processing device in accordance with another exemplary embodiment of the present disclosure. 
         FIG. 20  is a flow diagram of a method of reclaiming powder in accordance with an exemplary aspect of the present disclosure. 
         FIG. 21  is a flow diagram of a method reclaiming powder in accordance with another exemplary aspect of the present disclosure. 
         FIG. 22  is a flow diagram of a method of reclaiming powder in accordance with another exemplary aspect of the present disclosure. 
         FIG. 23  is a flow diagram of a method of reclaiming powder using a powder reclamation system in accordance with another exemplary aspect of the present disclosure. 
         FIG. 24  is a flow diagram of a method of operating a sieving system in accordance with an exemplary aspect of the present disclosure. 
     
    
    
     Corresponding reference characters indicate corresponding parts throughout the several views. The exemplifications set out herein illustrate exemplary embodiments of the disclosure, and such exemplifications are not to be construed as limiting the scope of the disclosure in any manner. 
     DETAILED DESCRIPTION 
     Reference will now be made in detail to present embodiments of the invention, one or more examples of which are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the invention. 
     The following description is provided to enable those skilled in the art to make and use the described embodiments contemplated for carrying out the invention. Various modifications, equivalents, variations, and alternatives, however, will remain readily apparent to those skilled in the art. Any and all such modifications, variations, equivalents, and alternatives are intended to fall within the spirit and scope of the present invention. 
     For purposes of the description hereinafter, the terms “upper”, “lower”, “right”, “left”, “vertical”, “horizontal”, “top”, “bottom”, “lateral”, “longitudinal”, and derivatives thereof shall relate to the invention as it is oriented in the drawing figures. However, it is to be understood that the invention may assume various alternative variations, except where expressly specified to the contrary. It is also to be understood that the specific devices illustrated in the attached drawings, and described in the following specification, are simply exemplary embodiments of the invention. Hence, specific dimensions and other physical characteristics related to the embodiments disclosed herein are not to be considered as limiting. 
     As used herein, the terms “first”, “second”, and “third” may be used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components. The terms “upstream” and “downstream” refer to the relative direction with respect to fluid flow in a fluid pathway. For example, “upstream” refers to the direction from which the fluid flows, and “downstream” refers to the direction to which the fluid flows. 
     A powder system of the present disclosure includes a broad frequency filter for the powder system. 
     A broad frequency filter assembly of the present disclosure restricts a first portion of a recovered powder larger than a predetermined threshold and allows a second portion of the recovered powder smaller than the predetermined threshold to pass therethrough. A broad frequency filter assembly of the present disclosure includes a first filter and a second filter. The first filter is fixed relative to a filter housing and the first filter is substantially rigid. The second filter is coupled within the filter housing adjacent to the first filter and the second filter is substantially flexible, i.e., the second filter is movable relative to the first filter within the filter housing when the filter housing moves relative to a support structure. 
     A powder mass control assembly of the present disclosure is configured to determine a mass of a powder on the broad frequency filter assembly and control one or more operations of the broad frequency filter assembly based on the determined mass of powder on the broad frequency filter assembly. 
     Referring now to the drawings, wherein identical numerals indicate the same elements throughout the figures,  FIGS. 1-23  illustrate various exemplary embodiments of the present disclosure. More specifically, referring first to  FIGS. 1-13 , generally, a powder reclamation system  10  in accordance with an exemplary embodiment of the present disclosure is provided. More specifically, still, referring to  FIGS. 1-2 , the exemplary powder reclamation system  10  is depicted.  FIG. 1  provides a front view of the exemplary powder reclamation system, and  FIG. 2  provides a rear view of the exemplary powder reclamation system  10 . As will be appreciated from  FIGS. 1 and 2 , and the description herein, the exemplary powder reclamation system generally includes a powder sieving system assembly  12 , a broad frequency filter assembly  14 , a powder mass control assembly  16 , an isolation assembly  18 , a new or virgin powder assembly  20 , an oxygen sensing assembly  24 , and a carrier gas assembly  28 . Notably, for the embodiment shown, the broad frequency filter assembly  14 , the powder mass control assembly  16 , and the isolation assembly  18  are each configured as part of the exemplary powder sieving assembly  12 . 
     As will be explained in greater detail below, the powder reclamation system  10  is generally configured to receive a reclaimed powder from a metal powder processing device  100  ( FIGS. 12 and 18 ), sieve the powder, and provide the sieved powder (along with a desired amount of virgin powder) back to the metal powder processing device. For the embodiment depicted, the powder reclamation system  10  generally includes a raw reclaimed powder hopper  54  for receiving the reclaimed powder, a filter housing  32  downstream of the raw reclaimed powder hopper  54  for receiving a raw reclaimed powder from the raw reclaimed powder hopper  54 , a filtered reclaimed powder hopper  56  for receiving a sieved reclaimed powder from the filter housing  32 , an oversized powder hopper  72  for receiving an oversized portion of the raw reclaimed powder hopper  54  from the filter housing  32  (see  FIG. 2 ), a virgin powder hopper  132  arranged in parallel with the filtered reclaimed powder hopper  56  and a network of passageways  166  connecting the various hopper and features of the reclamation system to one another and to a metal powder processing device  100 . 
     As will be appreciated from the description herein, the raw reclaimed powder hopper  54 , the filter housing  32 , and the filtered reclaimed powder hopper  56  (and certain other aspects) may be configured as a stand-alone sieving system, and may not be incorporated into a powder reclamation system (see, e.g., the embodiment of  FIG. 14 , discussed below). 
     Referring particularly to the filter housing  32 , in the exemplary embodiment depicted, the filter housing  32  includes a broad frequency filter assembly  14 . The broad frequency filter assembly  14  of the present disclosure restricts a first portion  27  of a powder  26  ( FIGS. 5 and 6 ) larger than a predetermined threshold and allows a second portion  29  of the powder  26  ( FIGS. 5 and 6 ) smaller than the predetermined threshold to pass therethrough. 
     It is also contemplated that the broad frequency filter  14  may include a separator that is configured to separate a first portion of the powder from a second portion of the powder. For example, the broad frequency filter  14  including a separator, in addition to being able to filter by powder sizes, may also be able to separate based on different types of powders, to remove clumps, and/or other separation criteria. 
     Referring to  FIGS. 3 through 5 , aspects of the filter housing  32  and broad frequency filter  14  will be described.  FIG. 3  provides a close-up view of the filter housing  32  of  FIGS. 1-2 ,  FIG. 4  provides a close-up, cross-sectional view of the filter housing  32  of  FIG. 3 , and  FIG. 5  provides a close-up, cross-sectional view of the broad frequency filter assembly  14 . In the exemplary embodiment depicted, the powder reclamation system  10  further includes a support structure  30 , with the filter housing  32  being movable relative to the support structure  30 . The filter housing  32  defines an inlet  34  and an outlet  36  and includes the broad frequency filter assembly or broad frequency filter  14  disposed between the inlet  34  and the outlet  36  of the filter housing  32 . 
     Referring particularly to  FIG. 5 , in an exemplary embodiment, the broad frequency filter  14  includes a first filter  40  and a second filter  42 . The first filter  40  is fixed relative to the filter housing  32 . In one embodiment, the first filter  40  is substantially rigid, e.g., the first filter  40  is substantially fixed relative to the filter housing  32 . For example, in at least certain exemplary embodiments, the first filter  40  may be configured to deflect or flex a maximum of less than about 0.5 inches during normal operations. The second filter  42  is coupled within the filter housing  32  adjacent to the first filter  40 . More specifically, the second filter  42  is coupled within the filter housing  32  such that the second filter  42  contacts the first filter  40  during operation of the broad frequency filter  14 . 
     In one embodiment, the second filter  42  is substantially flexible, i.e., the second filter  42  is movable relative to the first filter  40  within the filter housing  32  when the filter housing  32  moves relative to the support structure  30 . For example, referring now also to  FIG. 6 , providing another close-up view of the broad frequency filter assembly  14 , with the second filter  42  in a deflected position, the second filter  42  is movable relative to the first filter  40  within the filter housing  32  from a first, initial position ( FIG. 5 ) to a second, maximum deflection position ( FIG. 6 ). As is depicted in  FIG. 6 , in an exemplary embodiment, when the second filter  42  is in the maximum deflection position, the second filter  42  defines a maximum deflection away from the first filter  40  greater than ¼ inch and less than 5 inches. It is contemplated that in the maximum deflection position, the second filter  42  may be spaced other distances away from the first filter  40 . For example, in another exemplary embodiment, in the maximum deflection position, the second filter  42  defines a maximum deflection away from the first filter  40  greater than ¼ inch and less than 4 inches. In another exemplary embodiment, in the maximum deflection position, the second filter  42  defines a maximum deflection away from the first filter  40  greater than ¼ inch and less than 3 inches. In another exemplary embodiment, in the maximum deflection position, the second filter  42  defines a maximum deflection away from the first filter  40  greater than ¼ inch and less than 2 inches. In another exemplary embodiment, in the maximum deflection position, the second filter  42  defines a maximum deflection away from the first filter  40  greater than ¼ inch and less than 1 inch. In another exemplary embodiment, in the maximum deflection position, the second filter  42  defines a maximum deflection away from the first filter  40  greater than ½ inch and less than 1 inch. 
     As will be appreciated, the maximum deflection is defined in a direction perpendicular to a reference plane defined by the first filter. The movement of the second filter to the maximum deflection position is caused by a movement of the filter housing in a generally vertical direction by a plurality of motors, as well be explained in greater detail below with reference to, e.g.,  FIGS. 8 and 9 . 
     The first filter  40  and the second filter  42  of the broad frequency filter  14  are configured to restrict a first portion  27  of a powder  26  larger than a predetermined threshold from reaching the outlet  36  of the filter housing  32  and to allow a second portion  29  of the powder  26 , i.e., filtered reclaimed or recycled powder  29 , smaller than the predetermined threshold to pass through the first filter  40 , the second filter  42 , and the outlet  36  of the filter housing  32 . In an exemplary embodiment, the predetermined threshold of the first filter  40  and the second filter  42  of the broad frequency filter  14  is approximately 15 μm. In another exemplary embodiment, the predetermined threshold of the first filter  40  and the second filter  42  of the broad frequency filter  14  is approximately 150 μm. It is contemplated that the predetermined threshold of the first filter  40  and the second filter  42  of the broad frequency filter  14  may include other sizes. For example, in other exemplary embodiments, the predetermined threshold of the first filter  40  and the second filter  42  of the broad frequency filter  14  may be anywhere from approximately 15 μm to approximately 150 μm. 
     In order to facilitate such selective passage of the second portion of the powder therethrough, the first and second filters define a plurality of pores. More particularly, referring to the close-up portion  5 A of second filter  42  and close-up portion  5 B of first filter  40  in  FIG. 5 , the first filter  40  defines a plurality of first pores  48  extending through a thickness of the first filter  40  and the second filter  42  defines a plurality of second pores  49  extending through a thickness of the second filter  42 . Notably, the views in the close-up portion  5 A of second filter  42  and close-up portion  5 B of first filter  40  in  FIG. 5  are top-down views of a surface of the first filter  40  and second filter  42 , respectively. In certain embodiments, the plurality of first pores  48  may each define a size (e.g., width) less than a size of the plurality of second pores  49 . Alternatively, however, the first and second pores  48 ,  49  may all be substantially the same size. 
     During operation of the broad frequency filter  14 , as noted above, the second filter  42  moves between the initial position and the maximum deflection position, as a result of a generally vertical movement of the filter housing  32 . Such movement causes the second filter  42  to contact the first filter  40 , or “slap” the first filter  40 . Such contact may reduce an amount of clogging or blockage within the first and second pores  48 ,  49  of the first and second filters  40 ,  42 , resulting in a relatively efficient process. 
     In an exemplary embodiment, the first filter  40  and the second filter  42  are metallic filters. For example, in one embodiment, the first filter  40  and the second filter  42  are formed of a stainless steel. However, it is contemplated that the first filter  40  and the second filter  42  may be formed of other materials, e.g., other metallic materials. 
     In one embodiment, a powder reclamation system  10  of the present disclosure is configured to recover, filter, and recirculate a powder. The powder may be a reactive metal powder (i.e., may be formed of a metal powder that reacts with oxygen), such as a titanium or titanium alloy powder. Alternatively, the powder may consist of, e.g., an aluminum powder or other suitable powder. 
     Furthermore, referring still to  FIGS. 5 and 6 , the filter housing  32  includes a mounting assembly  43  and a seal  44  for mounting and sealing the first and second filters  40 ,  42  of the broad frequency filter  14  within the filter housing  32 . For example, the mounting assembly  43  provides a mechanism for mounting the first filter  40  adjacent to the second filter  42  within the filter housing  32 . Specifically, for the embodiment shown, the mounting assembly  43  of the filter housing  32  includes a first circumferential flange  51  and a second circumferential flange  53 , and a coupling  55  extending between the first and second circumferential flanges  51 ,  53 . The coupling  55  may be a nut, a plurality of bolts or screws, a clamp, etc. When assembled the coupling  55  presses the first and second circumferential flanges  51 ,  53  together. Notably, a circumferential end or outside edge  45  of the first filter  40  and a circumferential end or outside edge  46  of the second filter  42  are positioned between the first and second circumferential flanges  51 ,  53 , such that when assembled, the first and second filters  40 ,  42  are fixed in position within the filter housing  32 . 
     Moreover, referring now also to  FIG. 7 , a close-up, cross-sectional view of the mounting assembly  43  is provided. The above-described configuration is depicted with additional clarity. In addition, for the embodiment depicted, the filter housing  32  also includes a continuous U-shaped seal  44  that extends around an outside edge  45  of the first filter  40  and around an outside edge  46  of the second filter  42 . The seal  44  ensures a sealed environment of the filter housing  32  so that no portion of powder  26  escapes or plumes out of the filter housing  32 . More specifically, for the embodiment depicted, the filter housing  32  defines an upstream portion  57  located upstream of the first and second filters  40 ,  42  and a downstream portion  59  located downstream of the first and second filters  40 ,  42 . The U-shaped seal  44  extends continuously from the upstream portion  57 , around the outside edges  45 ,  46  of the first and second filters  40 ,  42 , to the downstream portion  59 . In such a manner, any powder that makes its way between the seal  44  and the outside edges  45 ,  46  of the first and second filters  40 ,  42  can only travel to the downstream portion  59  of the filter housing  32  (and not to an ambient location outside of the filter housing  32 ). It will be appreciated that any powders small enough to travel between the first and second filters  40 ,  42  and the U-shaped seal  44  will most likely be smaller than the first and second pores  48 ,  49  ( FIG. 5 ). 
     Referring back to  FIGS. 1 and 2 , as briefly mentioned above, the broad frequency filter  14  is effective at least in part as a result of the generally vertical movement of the filter housing  32  during operation. As is depicted, the powder sieving system assembly  12  of the present disclosure (which as noted above is incorporated into the exemplary powder reclamation system  10 ) includes a vibration assembly  90  for providing and controlling movement of the filter housing  32  relative to the support structure  30  and the second filter  42  relative to the first filter  40 . In one exemplary embodiment, the vibration assembly  90  includes a first motor  91  and a second motor  92 . The first motor  91  is positioned relative to a portion of the filter housing  32  via a first motor mounting assembly  93  and the second motor  92  is positioned relative to a portion of the filter housing  32  via a second motor mounting assembly  94 . In one embodiment, the first motor  91  is a first linear displacement motor and the second motor  92  is a second linear displacement motor. In this manner, the first motor  91  and the second motor  92  provide linear movement to the filter housing  32  relative to the support structure  30 . 
     Referring now also to  FIGS. 8 and 9 , the first motor  91  is depicted and described in greater detail.  FIG. 8  provides a perspective view of the first motor  91  mounted to the filter housing via the first motor mounting assembly  93 , and  FIG. 9  provides a straight-on view of the first motor  91  mounted to the filter housing via the first motor mounting assembly  93 . 
     As will be appreciated from  FIGS. 8 and 9 , the filter housing  32  defines a longitudinal axis  110 , which for the embodiment depicted is parallel to a vertical direction. Additionally, the first motor  91  is a first linear displacement motor configured to move along a first displacement axis  112 . In an exemplary embodiment, the first displacement axis  112  defines a first angle  116  with the longitudinal axis  110  greater than about 15 degrees and less than about 85 degrees. 
     As is further depicted, the first motor  91  is adjustably mounted to a portion of the filter housing  32  via the first motor mounting assembly  93  such that the first motor  91  is adjustably mounted to adjust an angle between the first displacement axis  112  and the longitudinal axis  110 . Specifically, the first motor mounting assembly  93  includes a plate  95  with a plurality of mounting holes or openings  96 , as well as a bracket  97  fixed to the first motor  91 . The bracket  97  is mountable to the plate  95  using the plurality of mounting holes  96 . By choosing the mounting holes  96  utilized to mount the bracket  97  to the plate  95 , the first angle  116  between the longitudinal axis  110  and the first displacement axis  112  may be modified. 
     Furthermore, although not depicted in detail in  FIGS. 8 and 9 , it will be appreciated that the second motor  92  and second motor mounting assembly  94  may be configured in substantially the same manner as the first motor  91  and first motor mounting assembly  93 . In such a manner, it will be appreciated that the second motor  92  may define a second displacement axis that defines an angle with the longitudinal axis  110  of the filter housing  32  similar to the first angle  116  (or different than the first angle  116 ). Further, in such a manner it will be appreciated that the second motor  92  may be adjustably mounted to a portion of the filter housing  32  via the second motor mounting assembly  94  such that the second motor  92  is adjustably mounted to adjust an angle between the second displacement axis and the longitudinal axis  110 . 
     Notably, however, in other embodiments, the first and second motors  91 ,  92  may be configured in any other suitable manner. For example, in other embodiments, the motors  91 ,  92  may define any other angle with the longitudinal axis  110 , may be mounted to the filter housing  32  in any other suitable manner, etc. Further, although two motors  91 ,  92  are shown, in other embodiments, the vibration assembly  90  may include any other suitable number or arrangement of motors. 
     Briefly, referring still to  FIGS. 8 and 9  (and as may also be seen, e.g., in  FIGS. 1 and 2 ), the powder reclamation system  10  of the present disclosure further includes a plurality of dampers  58  that extend between the support structure  30  and the filter housing  32  for mechanically isolating a movement of the filter housing  32  during operation of the powder sieving system assembly  12  and/or powder reclamation system  10 . In one embodiment, the plurality of dampers  58  may comprise a plurality of springs  70 . More specifically, the exemplary system  10  depicted includes a plate  98  coupled to the support structure  30  and a mounting ring  99  coupled to the filter housing  32 . The plurality of dampers  58  extend between the plate  98  and the mounting ring  99 . 
     It will be appreciated that the angle of the motors  91 ,  92  may generally be used to assist with the spreading of powder along a top surface of the filters  40 ,  42  in addition to the provision of the generally vertical movement to facilitate the second filter  42  moving relative to, and hitting against, the first filter  40 . More specifically, it will be appreciated that by angling the first and second motors  91 ,  92 , a centrifugal force component is applied to the powder on top of the first filter  40 , forcing the powder too large to fit through the pores  48  of the first filter  40  towards the outer edge of the first filter  40 . 
     More specifically, referring now also to  FIGS. 10 and 11 , providing a cross-sectional view of the filter housing  32  having an oversized powder or second outlet  38 , and a close-up of the oversized powder outlet  38 , respectively, it will be appreciated that the filter housing  32  also defines a second outlet  38  (i.e., an oversized powder outlet) that is positioned upstream of the first filter  40  and the second filter  42  for receiving the first portion  27  of the powder  26  that is larger than the predetermined threshold and that is restricted by the broad frequency filter  14  from passing therethrough. Advantageously, the movement of the second filter  42  relative to the first filter  40  and the movement of the filter housing  32  relative to the support structure  30  helps to move the first portion  27  of the powder  26  to the second outlet  38 . More specifically, as discussed above, the angled orientation of the first and second motors  91 ,  92  generates a centrifugal force that urges the powder  26  towards the outer edge  45  of the first filter  40 , allowing the powder  26  to spread over the first filter  40 , and for the powder  26  that doesn&#39;t pass through the first filter  40  to be ejected from the filter housing  32  through the second opening  38  to an oversized powder hopper  72  (see  FIG. 2 ). 
     In an exemplary embodiment, the powder reclamation system  10 , the powder sieving system assembly  12 , and the broad frequency filter assembly  14  of the present disclosure include an oversized powder hopper  72  (see  FIG. 2 ) that is positioned downstream of the second outlet  38  of the filter housing  32 , e.g., the oversized powder hopper  72  and the second outlet  38  of the filter housing  32  are in flow communication. In this manner, the first portion  27  of the powder  26  that does not pass through the broad frequency filter  14  moves through the second outlet  38  of the filter housing  32  and is collected within the oversized powder hopper  72 . 
     Notably, in an exemplary embodiment, a powder reclamation system  10  of the present disclosure includes an isolation assembly  18  for isolating a powder  26  traveling through a powder reclamation system  10  to only come into contact with metallic portions to prevent contamination of the powder  26  with non-metallic portions. The isolation assembly  18  may facilitate such isolation despite the movement of the filter housing  32  described above generated by the vibration assembly  90  relative to the support structure  30 , and the raw reclaimed powder hopper  54 , the filtered reclaimed powder hopper  56 , and the oversized powder hopper  72 . 
     More specifically, referring now to  FIGS. 4 and 10 , providing close up views of the isolation assembly  18  at the connection between the raw reclaimed powder hopper  54  and the filter housing  32 , and between the filter housing  32  and the filtered reclaimed powder hopper  56 , respectively, the isolation assembly  18  includes powder passageways  121  that include a flexible mounting portion  120 ,  124  and a metallic liner portion  122 ,  126  that is respectively positioned within the flexible mounting portion  120 ,  124 . For example, referring particularly to the embodiment depicted in  FIG. 4 , the isolation assembly  18  includes a first flexible mounting  120  that extends between the raw reclaimed powder hopper  54  and the inlet  34  of the filter housing  32  and a first metallic liner  122  that is positioned within the first flexible mounting  120  and is fixed to one of the raw reclaimed powder hopper  54  or the inlet  34  of the filter housing  32 . In particular, for the embodiment depicted, the first metallic liner  122  is fixed to the raw reclaimed powder hopper  54 , such that the first metallic liner  122  does not move with the filter housing  32  when the filter housing  32  is vibrated using the vibration assembly  90 . 
     Similarly, referring particularly to  FIGS. 4 and 10 , the isolation assembly  18  includes a second flexible mounting  124  that extends between the outlet  36  of the filter housing  32  and the filtered reclaimed powder hopper  56  and a second metallic liner  126  that is positioned within the second flexible mounting  124  and is fixed to one of the filtered reclaimed powder hopper  56  or the outlet  36  of the filter housing  32 . In particular, for the embodiment depicted, the second metallic liner  126  is fixed to the filter housing  32 , such that the second metallic liner  126  is configured to move with the filter housing  32  relative to the filtered reclaimed powder hopper  56  when the filter housing  32  is vibrated using the vibration assembly  90 . 
     In this manner, a powder  26  traveling through a powder reclamation system  10  only comes into contact with metallic portions, i.e., the metallic liner portions  122 ,  126 , to prevent contamination of the powder  26  with non-metallic portions, i.e., the flexible mounting portions  120 ,  124 . Furthermore, this configuration allows for the flexible mounting portions  120 ,  124  to expand and contract along with the movement of the powder sieving system  12  during operation. In certain exemplary embodiments, the metallic liners  122 ,  126  may be, e.g., a stainless steel or other suitable material. By contrast, the flexible mountings  120 ,  124  may be an elastomeric or other flexible material. 
     As will further be appreciated from the description herein, a powder reclamation system  10  in accordance with one or more embodiments of the present disclosure is able to recover unused portions of powder  26  from a metal powder processing device, sieve the powder to a desired size distribution, and then return the powder to the metal powder processing device (along with some virgin powder, as desired). 
     As used herein, the term “metal powder processing device” refers to any metal powder processing device or system such as additive manufacturing machines, powder removal devices or systems, mixing stations, or other metal powder processing devices or systems. Furthermore, portions of a powder reclamation system or portions of a powder sieving system of the present disclosure are configured to be in communication with such metal powder processing devices. As used herein, the term “in communication with” refers to any type of connection or attachment between portions of a powder reclamation system or portions of a powder sieving system of the present disclosure with such metal powder processing devices for recovering a portion of a powder from the metal powder processing devices. 
     More specifically, referring now also to  FIGS. 12 and 18 , a powder reclamation system  10  of the present disclosure is depicted in connection with a metal powder processing device  100 . As noted above, the powder reclamation system  10  includes a network of passageways  166 , a raw reclaimed powder hopper  54 , a filtered reclaimed powder hopper  56 , and a plurality of dampers  58 . The network of passageways  166  connects the various hopper and features of the reclamation system  10  to one another and to a metal powder processing device  100 . In particular, for the embodiment depicted, the network of passageways  166  includes a reclamation passageway  50  and a recirculation passageway  52 . 
     During reclamation operations of the powder reclamation system  10 , the reclamation passageway  50  is configured to receive unused powder from the metal powder processing device  100 . The unused powder may be transported through the reclamation passageway  50  by flowing a carrier gas through the metal powder processing device  100  and from the metal powder processing device  100  through the reclamation passageway  50 . 
     Referring still to  FIGS. 12 and 18 , in an exemplary embodiment, the raw reclaimed powder hopper  54  is in communication with the inlet  34  of the filter housing  32 . The raw reclaimed powder hopper  54  receives an unused portion of a powder  26  from the metal powder processing device  100 . In one embodiment, the reclamation passageway  50  is in communication with the inlet  34  of the filter housing  32  and is configured to recover the unused portion of the powder  26  from the metal powder processing device  100 . For example, in one embodiment, the reclamation passageway  50  is in communication with the raw reclaimed powder hopper  54  and a metal powder processing device  100 . In this manner, the reclamation passageway  50  provides a conduit or channel to recover an unused portion of a powder  26  from the metal powder processing device  100  to the raw reclaimed powder hopper  54  which is in communication with the inlet  34  of the filter housing  32 . A powder  26  travels through the reclamation passageway  50  to the raw reclaimed powder hopper  54  and through the inlet  34  of the filter housing  32  to the broad frequency filter  14  for filtering. 
     Referring now briefly also to  FIG. 13 , providing a side, cross-sectional view of the raw reclaimed powder hopper  54 , the raw reclaimed powder hopper  54  is described in more detail. As shown, the raw reclaimed powder hopper  54  depicted defines a raw powder inlet  60 , a raw powder outlet  62  in communication with the inlet  34  of the filter housing  32 , and a carrier gas outlet  64 . The reclamation passageway  50  extends to the raw powder inlet  60  of the raw reclaimed powder hopper  54 . For the embodiment shown, the inlet  60  is positioned in a side of the raw reclaimed powder hopper  54  and oriented at an angle relative to a centerline of the raw reclaimed powder hopper  54  (see also, e.g.,  FIG. 2 ). In such a manner, an outer wall  68  of the raw reclaimed powder hopper  54  may act as a gravity-operated separator, such that the heavier powder falls to a bottom end of the raw reclaimed powder hopper  54  and the lighter carrier gas rises to a top end of the raw reclaimed powder hopper  54 . In such a manner, it will further be appreciated that the carrier gas outlet  64  is positioned at a top end of the raw reclaimed powder hopper  54  and the powder outlet  62  is positioned at a bottom end of the raw reclaimed powder hopper  54 . 
     The raw reclaimed powder hopper  54  also includes a powder filter  66  within the carrier gas outlet  64  for removing powder from a carrier gas flow through the carrier gas outlet  64 . The powder filter  66  is configured to prevent or reduce any powder received through the raw powder inlet  60  of the raw reclaimed powder hopper  54  from passing through the carrier gas outlet  64  of the raw reclaimed powder hopper  54 . The powder filter  66  is, for the embodiment depicted, formed of a metal material to reduce a contamination of any powder filtered out of the carrier gas by the powder filter  66 . More specifically, it will be appreciated that for the exemplary system depicted, the powder  26  is formed of a material and the powder filter  66  is formed substantially of the same material (e.g., titanium or a titanium allow). Such may further reduce a risk of the powder  26  being contaminated. 
     It will be appreciated, however, that in other embodiments, the powder filter  66  may be formed of any other suitably material, such as a stainless steel material. 
     Further, it will be appreciated that for the embodiment depicted, the raw reclaimed powder hopper  54  includes a plurality of powder filters  66  arranged in parallel flow, and more specifically still includes four powder filters. Each of the plurality of powder filters  66  may be formed of a metal material to reduce a risk of contamination of the powder filtered out of the carrier gas. 
     Moreover, the powder filters  66  depicted are each in airflow communication with a high pressure gas source, such as a high pressure carrier gas source  180 . The high pressure gas source may be configured to selectively flow high pressure gas in a direction opposite a normal gas flow direction through the filters  66 . In such a manner, the high pressure gas source may be configured to “purge” the filters  66 . 
     Referring back to  FIGS. 1-2 , as noted above, the reclamation system  10  further includes the filtered reclaimed powder hopper  56 . The filtered reclaimed powder hopper  56  is in communication with the outlet  36  of the filter housing  32 . As explained in greater detail above, the filter housing  32  receives the raw reclaimed powder from the raw reclaimed powder hopper  54 , filters the powder to obtain a desired powder size distribution (e.g., separates a second portion  29  of the powder  26  from a first portion  27  of the powder  26 ) using a filter  14 , and provides the second portion  29  of the powder  26  to the outlet  36  of the filter housing  32 . The filtered reclaimed powder hopper  56  receives the second portion  29  of the powder  26 , i.e., filtered reclaimed or recycled powder  29 , that passes through the first filter  40  and the second filter  42 . In one embodiment, a recirculation passageway  52  is in communication with the outlet  36  of the filter housing  32  and is configured to recirculate the second portion  29  of the powder  26  that passes through the first filter  40  and the second filter  42  back to the metal powder processing device  100 . More specifically, for the embodiment shown, the recirculation passageway  52  is in communication with the filtered reclaimed powder hopper  56  and the metal powder processing device  100 . In this manner, the recirculation passageway  52  provides a conduit or channel to recirculate the second portion  29  of the powder  26  collected within the filtered reclaimed powder hopper  56  back to the metal powder processing device  100 . 
     A reclamation system and/or a sieving system assembly of the present disclosure can be configured to recirculate different sizes of powders and/or different types of powders back to a metal powder processing device  100 . 
     Referring now back to the front and rear system views of  FIGS. 1 and 2 , in one embodiment, the powder reclamation system  10  of the present disclosure utilizes a carrier gas assembly  28  for generating a pressure drive system to move the powder  26  from the metal powder processing device  100  to the powder reclamation system  10  and throughout the powder reclamation system  10 . The carrier gas assembly  28  includes a high pressure carrier gas source  180 , and associated pressure drive system components, that provides and generates the pressure drive system. In exemplary embodiments, the carrier gas assembly  28  may introduce an argon gas or nitrogen gas pressure drive system throughout the powder reclamation system  10  of the present disclosure. 
     For the embodiment depicted, the carrier gas assembly  28  is in flow communication with the network of passageways  166  for providing the carrier gas into and through the network of passageways  166 . In particular, the carrier gas assembly  28  may be configured to replace all gas within the powder reclamation system  10  with the carrier gas. As such, the carrier gas assembly  28  may generally include a carrier gas source, a carrier gas pump, one or more carrier gas valves, etc. In such a manner the carrier gas assembly  28  may provide pressurized carrier gas through the network of passageways  166 , e.g., to assist with moving powder through the network of passageways  166 . 
     Referring still to  FIGS. 1 and 2 , in an exemplary embodiment, a powder reclamation system  10 , a powder sieving system assembly  12 , and a broad frequency filter assembly  14  of the present disclosure include a powder mass control assembly  16 . The powder mass control assembly  16  is configured to determine data indicative of a mass of the powder  26  on the broad frequency filter  14  and control one or more operations of the powder sieving system assembly  12  based on the determined data indicative of the mass of powder  26  on the broad frequency filter  14 . 
     In the embodiment depicted, the powder mass control assembly  16  includes a first load cell  80 , a second load cell  82 , and a third load cell  84  for determining data indicative of a mass of the powder  26  on the broad frequency filter  14 . The first load cell  80  is in communication with the raw reclaimed powder hopper  54  and the first load cell  80  is configured to measure data indicative of a first mass of powder  26  within the raw reclaimed powder hopper  54 . 
     The second load cell  82  is in communication with the filtered reclaimed powder hopper  56  and the second load cell  82  is configured to measure data indicative of a second mass of powder  26  within the filtered reclaimed powder hopper  56 . 
     The third load cell  84  is in communication with the oversized powder hopper  72  and the third load cell  84  is configured to measure data indicative of a third mass of powder  26  within the oversized powder hopper  72 . The first load cell  80 , the second load cell  82 , and the third load cell  84  may be mounted at any suitable location to sense data indicative of a mass of powder within the respective hoppers. For example, the first load cell  80 , the second load cell  82 , and/or the third load cell  84  may be mounted to the support structure  30  supporting the respective hopper. Further, the first load cell  80 , the second load cell  82 , and the third load cell  84  may be configured as any suitable load cell capable of measuring data indicative of a mass of powder within the respective hoppers. Accordingly, it will be appreciated that the term “load cell” is meant to generically refer to any sensor capable to measuring data indicative of a mass of powder within a hopper. For example, the first load cell  80 , the second load cell  82 , and/or the third load cell  84  may include one or more of a strain gauge, a pneumatic load cell, a hydraulic load cell, piezoelectric load cell, etc. 
     The powder mass control assembly  16  is configured to determine data indicative of the mass of the powder  26  on the broad frequency filter  14  using the first load cell  80 , the second load cell  82 , and the third load cell  84 . 
     For example, in at least certain exemplary embodiments the powder mass control assembly  16  may first sense data indicative of a mass of powder within the raw reclaimed powder hopper  54  prior to providing any raw reclaimed powder to the filter housing  32 . The powder mass control assembly  16  may then provide a desired amount of raw reclaimed powder to the filter housing  32  and initiate operation of the vibration assembly  90 . The powder mass control assembly  16  may periodically or continuously measure data indicative of a powder within the filtered reclaimed powder hopper  56  and oversized powder hopper  72  to estimate the amount of powder within the filter housing  32  and, e.g., on the first filter  40  of the broad frequency filter  14 . The powder mass control assembly  16  may operate in an open loop control to maintain a desired mass of powder on the first filter  40  of the broad frequency filter  14 . 
     For example, the powder mass control assembly  16  may control one or more operations of the powder sieving system assembly  12  based on the determined data indicative of the mass of powder  26  on the broad frequency filter  14 . For example, the powder mass control assembly  16  may control a powder flow rate or amount from the raw reclaimed powder hopper  54  to the filter housing  32  based on the determined data indicative of the mass of powder  26  on the broad frequency filter  14 . Additionally, or alternatively, the powder mass control assembly  16  may be configured to control an intensity, a frequency, or a combination thereof of the first and second motors  91 ,  92  of the vibration assembly  90  based on the determined data indicative of the mass of powder  26  on the broad frequency filter  14 . 
     Referring to  FIGS. 1 and 2 , the powder mass control assembly  16  of the present disclosure provides mass control, e.g., load cells  80 ,  82 ,  84 , above and below the broad frequency filter  14  to ensure for precise mass monitoring and control. 
     The broad frequency filter  14  of the present disclosure may operate more efficiently when a certain mass of powder  26  is on the first filter  40  of the broad frequency filter  14 . Advantageously, the powder mass control assembly  16  of the present disclosure controls a mass of the powder  26  on the broad frequency filter  14  and ensures a desired mass of the powder  26  is on the broad frequency filter  14  during operation. Furthermore, the powder mass control assembly  16  controls one or more operations of the broad frequency filter  14  based on the determined mass of powder  26  on the broad frequency filter  14 . 
     Referring now back to  FIGS. 1 and 2 , as briefly noted above, in an exemplary embodiment, a powder reclamation system  10  of the present disclosure includes a new or virgin powder assembly  20  for introducing a new or virgin powder  130  with a second portion  29  of powder  26 , i.e., filtered reclaimed or recycled powder  29 , that is smaller than the predetermined threshold and passes therethrough the broad frequency filter  16 . Advantageously, a powder reclamation system  10  of the present disclosure including a new or virgin powder assembly  20  provides a system that is able to introduce and maintain a desired mix of filtered reclaimed powder  29  and virgin powder  130 . 
     In an exemplary embodiment, the new or virgin powder assembly  20  includes a virgin powder hopper  132 , a powder delivery line  134 , and a controller  136 . The virgin powder hopper  132  contains a virgin powder  130 . The powder delivery line  134  is configured for providing a flow of powder to a metal powder processing device  100  (see also,  FIG. 12 ). The powder delivery line  134  is in flow communication with the filtered reclaimed powder hopper  56  and the virgin powder hopper  132 . In this manner, the filtered reclaimed powder hopper  56  containing the filtered reclaimed or recycled powder  29  and the virgin powder hopper  132  containing the virgin powder  130  are each in flow communication with the powder delivery line  134  for mixing of the filtered reclaimed powder  29  and the virgin powder  130  theretogether. In an exemplary embodiment, the virgin powder assembly  20  also includes a mixer that is in communication with the powder delivery line  134  and that is configured to mix the virgin powder  130  and the filtered reclaimed powder  29  theretogether. 
     More particularly, as is depicted in  FIG. 1 , the powder reclamation system  10  further comprises a plurality of valves for regulating a flow of powder to the powder delivery line  134 . Specifically, the powder reclamation system  10  includes a filtered powder valve for regulating a flow of filtered powder from the filtered reclaimed powder hopper  56  to the powder delivery line  134  and a virgin powder valve for regulating a flow of virgin powder from the virgin powder hopper  132  to the powder delivery line  134 . The filtered powder valve and the virgin powder valve may each be in operable communication with a controller  136  to selectively provide filtered powder and virgin powder to the powder delivery line  134 , and to the metal powder processing device. In one exemplary embodiment, the controller  136  is operably coupled to a pressurized carrier gas source for providing the mixture of the filtered reclaimed powder  29  and the virgin powder  130  through the powder delivery line  134 . The controller  136  is operably coupled to the filtered powder valve and the virgin powder valve for providing the mixture of the filtered reclaimed powder and the virgin powder through the powder delivery line  134 . For example, the controller  136  is configured to sequentially open the filtered powder valve and the virgin powder valve to provide the mixture of the filtered reclaimed powder and the virgin powder through the powder delivery line  134 . 
     For example, in certain exemplary embodiments, the powder reclamation system  10  may be configured to sequentially provide powder  29  from the filtered reclaimed powder hopper  56  and from the virgin powder hopper  132  to ensure the powder provided to the metal powder processing device  100  has a desired mixture of filtered reclaimed powder  29  and virgin powder  130 . 
     By way of example only, if ten (10) units of powder are desired to be provided to the metal powder processing device  100 , with an overall composition of 6 units of reclaimed filtered powder  29 , and 4 units of virgin powder  130 , the powder reclamation system  10  of the present disclosure may sequentially provide powder from the filtered reclaimed powder hopper  56  and from the virgin powder hopper  132  to provide the desire amount and composition of powder. For example, the powder reclamation system  10  may sequentially provide two (2) units of powder from the filtered reclaimed powder hopper  56  and one (1) unit of powder from the virgin powder hopper  132  until a desired amount of powder is provided to the metal powder processing device  100 . With such an exemplary embodiment, the powder reclamation system  10  may go through multiple rounds in order to provide the desired amount of powder to the metal powder processing device  100 . For example, the powder reclamation system  10  may go through at least two rounds, such as at least three rounds, such as up to one hundred rounds. 
     By providing the powder in multiple rounds of these sequentially or alternating ratios, the powder may have a desired substantially homogenous mixture within the hopper of the metal powder processing device  100 . 
     It will be appreciated that although the above-described powder reclamation system  10  is described as being operable with a single metal powder processing device, in other embodiments, the powder reclamation system  10  of the present disclosure may additionally or alternatively be operable with a plurality of metal powder processing devices. For example, referring now to  FIG. 19 , in an exemplary embodiment, a powder reclamation system  10  of the present disclosure includes a multiple metal powder processing device attachment assembly  22  for allowing the powder reclamation system  10  to connect to and recover powder from a plurality of metal powder processing devices. 
     A powder reclamation system  10  of the present disclosure may be operable with a plurality of metal powder processing devices in a variety of different configurations, such as in series, in parallel, or in other hybrid configurations. For example, in one exemplary embodiment, a powder reclamation system  10  can be directly connected to a plurality of metal powder processing devices as shown in  FIG. 19 . In other exemplary embodiments, a powder reclamation system  10  can be directly connected to a first metal powder processing device and indirectly connected to a second metal powder processing device which is directly connected to the first metal powder processing device. In other words, a powder reclamation system  10  can be connected to a first metal powder processing device which is connected to a second metal powder processing device in a series configuration. 
     In an exemplary embodiment, the multiple metal powder processing device attachment assembly  22  includes a multi-source input attachment system  140  having a first connection portion  142  for connecting the powder reclamation system  10  to a first metal powder processing device  100  and a second connection portion  144  for connecting the powder reclamation system  10  to a second metal powder processing device  102 . Although  FIG. 19  illustrates the powder reclamation system  10  connected with a first and second metal powder processing device  100 ,  102 , it is contemplated that the multiple metal powder processing device attachment assembly  22  of the present disclosure can be used to connect any number of metal powder processing devices to a powder reclamation system  10  of the present disclosure. 
     In an exemplary embodiment, a powder reclamation system  10  of the present disclosure includes a first reclamation passageway  50  and a second reclamation passageway  150 . For example, referring to  FIG. 19 , the first reclamation passageway  50  is in communication with the raw reclaimed powder hopper  54  and a first metal powder processing device  100  via the first connection portion  142  of the multi-source input attachment system  140 . The first reclamation passageway  50  is configured to recover a first unused portion of a first powder from the first metal powder processing device  100  to the raw reclaimed powder hopper  54 . 
     Referring to  FIG. 19 , the second reclamation passageway  150  is in communication with the raw reclaimed powder hopper  54  and a second metal powder processing device  102  via the second connection portion  144  of the multi-source input attachment system  140 . The second reclamation passageway  150  is configured to recover a second unused portion of a second powder from the second metal powder processing device  102  to the raw reclaimed powder hopper  54 . In this manner, both of the first unused portion of a first powder from the first metal powder processing device  100  and the second unused portion of a second powder from the second metal powder processing device  102  reach the raw reclaimed powder hopper  54 . Next, the first powder and the second powder go through a filtering process with the broad frequency filter  14  as described herein. The broad frequency filter  14  is configured to restrict a first portion of the first and second powders larger than a predetermined threshold from reaching the outlet  36  of the filter housing  32  and to allow a second portion of the first and second powders smaller than the predetermined threshold to pass through the first filter  40 , the second filter  42 , and the outlet  36  of the filter housing  32 . Next, the second portion of the first and second powders is received within the filtered reclaimed powder hopper  56  in communication with the outlet  36  of the filter housing  32 . 
     It is also contemplated that the broad frequency filter  14  may include a separator that is configured to separate a first portion of the first and second powders from a second portion of the first and second powders. For example, the broad frequency filter  14  including a separator, in addition to being able to filter by powder sizes, may also be able to separate based on different types of powders, to remove clumps, and/or other separation criteria. 
     In an exemplary embodiment, a powder reclamation system  10  of the present disclosure includes a first recirculation passageway  52  and a second recirculation passageway  152 . For example, referring to  FIG. 19 , the first recirculation passageway  52  is in communication with the filtered reclaimed powder hopper  56  and the first metal powder processing device  100 . The first recirculation passageway  52  is configured to recirculate a first part of the second portion of the first and second powders back to the first metal powder processing device  100 . 
     Referring to  FIG. 19 , the second recirculation passageway  152  is in communication with the filtered reclaimed powder hopper  56  and the second metal powder processing device  102 . The second recirculation passageway  152  is configured to recirculate a second part of the second portion of the first and second powders back to the second metal powder processing device  102 . 
     Furthermore, in an exemplary embodiment, the multiple metal powder processing device attachment assembly  22  includes a controller  154  that is in communication with a portion of the powder reclamation system  10  and/or the metal powder processing devices. For example, in one embodiment, the controller  154  is in communication with the raw reclaimed powder hopper  54  and/or the metal powder processing devices. The controller  154  is operable to control an amount of the first unused portion of the first powder that is recovered from the first metal powder processing device  100  to the raw reclaimed powder hopper  54  and control an amount of the second unused portion of the second powder that is recovered from the second metal powder processing device  102  to the raw reclaimed powder hopper  54 . 
     In an exemplary embodiment, the multiple metal powder processing device attachment assembly  22  also includes a second controller  156  that is in communication with a portion of the powder reclamation system  10  and/or the metal powder processing devices. For example, in one embodiment, the second controller  156  is in communication with the virgin powder hopper  132  and/or the metal powder processing devices. The second controller  156  is operable to selectively dose the second portion of the first and second powders with the virgin powder  130  at a location upstream of the first and second metal powder processing devices  100 ,  102 . 
     More particularly, as is depicted in  FIG. 19 , the powder reclamation system  10  including a multiple metal powder processing device attachment assembly  22  further includes a plurality of valves for regulating a flow of powder from the metal powder processing devices and back to the metal powder processing devices. Specifically, the powder reclamation system  10  includes a reclamation valve for regulating a flow of a recovered first powder from the first metal powder processing device  100  to the raw reclaimed powder hopper  54  via the first reclamation passageway  50  and regulating a flow of a recovered second powder from the second metal powder processing device  102  to the raw reclaimed powder hopper  54 . The system  10  also includes a recirculation valve for regulating a flow of a recirculated first part of the second portion of the first and second powders back to the first metal powder processing device  100  via the first recirculation passageway  52  and regulating a flow of a recirculated second part of the second portion of the first and second powders back to the second metal powder processing device  102  via the second recirculation passageway  152 . The reclamation valve and the recirculation valve may each be in operable communication with a controller  154 ,  156  to selectively recover powder from the metal powder processing devices  100 ,  102  and to selectively recirculate powder back to the metal powder processing devices  100 ,  102 . In one exemplary embodiment, the controllers  154 ,  156  are operably coupled to a pressurized carrier gas source for recovering powder from the metal powder processing devices  100 ,  102  and for recirculating powder back to the metal powder processing devices  100 ,  102 . 
     Furthermore, the controllers  154 ,  156  of the multiple metal powder processing device attachment assembly  22  can provide different pressures of a carrier gas flow through the respective passageways, e.g., the first reclamation passageway  50 , the second reclamation passageway  150 , the first recirculation passageway  52 , and the second recirculation passageway  152 , coupling the powder reclamation system  10  to respective metal powder processing devices  100 ,  102 . 
     The controllers  154 ,  156  of the multiple metal powder processing device attachment assembly  22  can also reclaim powder simultaneously from multiple metal powder processing devices, or sequentially. Additionally, the controllers  154 ,  156  of the multiple metal powder processing device attachment assembly  22  can also recirculate or provide powder simultaneously to multiple metal powder processing devices, or sequentially. 
     In an exemplary embodiment of the present disclosure, the passageways of respective portions of the multiple metal powder processing device attachment assembly  22  of a powder reclamation system  10  may include different configurations, sizes, and dimensions. For example, the first reclamation passageway  50  defines a first cross-sectional area and the second reclamation passageway  150  defines a second cross-sectional area. In one embodiment, the first cross-sectional area of the first reclamation passageway  50  is different than the second cross-sectional area of the second reclamation passageway  150 . In some embodiments, the first cross-sectional area of the first reclamation passageway  50  may be the same as the second cross-sectional area of the second reclamation passageway  150 . Furthermore, the first reclamation passageway  50  defines a first length and the second reclamation passageway  150  defines a second length. In one embodiment, the second length of the second reclamation passageway  150  is greater than the first length of the first reclamation passageway  50 , and the first cross-sectional area is less than the second cross-sectional area. Thus, in some embodiments, the sizes, lengths, and dimensions of the first reclamation passageway  50  and the second reclamation passageway  150  are different. 
     Furthermore, as noted above, the powder reclamation system  10  may be utilized to reclaim, filter, and distribute reactive metal powders to one or more metal powder processing devices. As such, it may be beneficial to include features to ensure an internal environment of the powder reclamation system  10  is sufficiently devoid of oxygen to prevent an undesirable reaction between the powder and oxygen. 
     Specifically, referring still to  FIGS. 1 and 2 , in an exemplary embodiment, a powder reclamation system  10  of the present disclosure includes an oxygen sensing assembly  24  of the present disclosure that monitors an amount of oxygen within the powder reclamation system  10  of the present disclosure. The oxygen sensing assembly  24  of the present disclosure includes a sensor for monitoring the amount of oxygen within the powder reclamation system  10  and the oxygen sensing assembly  24  is configured to initiate a corrective action in response to receiving data indicative of the amount of oxygen within the powder reclamation system  10  exceeding a predetermined threshold. 
     In an exemplary embodiment, the oxygen sensing assembly  24  of the present disclosure includes a sensor assembly  24  that is in communication with a portion of the powder reclamation system  10  and the powder sieving system  12 . The sensor assembly  24  is configured to monitor an amount of oxygen within a network of passageways  166  of the powder reclamation system  10 . For example, in one exemplary embodiment, the network of passageways  166  include the reclamation passageways  50 ,  150 , the recirculation passageways  52 ,  152 , the raw reclaimed powder hopper  54 , the filtered reclaimed powder hopper  56 , the oversized powder hopper  72 , the virgin powder hopper  132 , the multi-source input attachment system  140 , and/or other connecting passageways throughout the powder reclamation system  10 . 
     As described above, in one embodiment, the powder reclamation system  10  of the present disclosure utilizes a carrier gas assembly  28  for generating a pressure drive system to move a powder  26  from a metal powder processing device  100  to the powder reclamation system  10  and throughout the powder reclamation system  10 . In exemplary embodiments, the carrier gas assembly  28  may introduce an argon gas or nitrogen gas pressure drive system throughout the powder reclamation system  10  of the present disclosure. 
     In this manner, the carrier gas assembly  28  provides a pressure drive system for moving a powder  26  through the network of passageways  166  of the powder reclamation system  10  that is configured to recover a powder  26  from a machine  100 , to move a powder  26  to the filter housing  32  for filtering, and to recirculate a portion of the powder  26  that passes through the filter housing  32  back to the machine  100 . 
     In one exemplary embodiment, the sensor assembly  24  includes a first sensor  162  and a second sensor  164 . The first sensor  162  is in communication with a portion of the powder sieving system  12 . For example, referring to  FIGS. 1 and 13 , the first sensor  162  is in communication with a portion of the broad frequency filter  14 , e.g., the filter housing  32 . The first sensor  162  is configured to monitor an amount of oxygen within the network of passageways  166 . 
     The second sensor is in communication with a second portion of the powder sieving system  12 . For example, referring to  FIG. 1 , the second sensor  164  is in communication with a portion of the raw reclaimed powder hopper  54 . The second sensor  164  is spaced apart from the first sensor  162 ; and the second sensor  164  is configured to monitor the amount of oxygen within the network of passageways  166 . 
     In one embodiment, the first sensor  162  and the second sensor  164  are optical sensors. More specifically, referring now to  FIG. 3 , providing a close-up, view of the first sensor  162 , the first sensor generally sends lasers to detect an oxygen level throughout a powder reclamation system  10  of the present disclosure. In this manner, the sensors  162 ,  164  do not heat up air which may be dangerous because of the powder  26  therein. 
     As described above, a powder  26  that is recovered, filtered, and recirculated by a powder reclamation system  10  of the present disclosure may be reactive with oxygen. Advantageously, the oxygen sensing assembly  24  of the present disclosure monitors an amount of oxygen within the powder reclamation system  10  of the present disclosure to prevent a powder  26  from reacting with oxygen. Additionally, by having optical sensors, the sensors  162 ,  164  send lasers to detect an oxygen level throughout a powder reclamation system  10  of the present disclosure. In this manner, the sensors  162 ,  164  do not heat up air which is dangerous because of the powder  26  therein. 
     As noted, the powder reclamation system may be configured to initiate a corrective action in response to receiving data indicative of an oxygen content being above a predetermined oxygen threshold. 
     In an exemplary embodiment, the oxygen sensing assembly  24  includes a controller  174  that is operably coupled to the sensor assembly  24 , e.g., the first sensor  162 , for receiving data indicative of the amount of oxygen within the network of passageways  166  from the first sensor  162 . The controller  174  of the oxygen sensing assembly  24  is configured to initiate a corrective action in response to receiving data indicative of the amount of oxygen within the network of passageways  166  being above a predetermined oxygen threshold. In one exemplary embodiment, the predetermined oxygen threshold is a 4% oxygen content within the network of passageways  166  of the powder reclamation system  10 . In another exemplary embodiment, the predetermined oxygen threshold is a 1% oxygen content within the network of passageways  166  of the powder reclamation system  10 . 
     In one embodiment, the controller  174  of the oxygen sensing assembly  24  initiates a corrective action by shutting down a powder flow within the network of passageways  166 . Furthermore, the controller  174  of the oxygen sensing assembly  24  initiates a corrective action by providing additional carrier gas to the network of passageways  166 . 
     In some exemplary embodiments, the first sensor  162 , the second sensor  164 , and the controller  174  of the oxygen sensing assembly  24  are configured to shut down a powder flow throughout the powder reclamation system  10  if the amount of oxygen detected within the network of passageways  166  exceeds 4 percent. In another embodiment, the first sensor  162 , the second sensor  164 , and the controller  174  of the oxygen sensing assembly  24  are configured to shut down a powder flow throughout the powder reclamation system  10  if the amount of oxygen detected within the network of passageways  166  exceeds 1 percent. 
     In exemplary embodiments, the sensor assembly  24  may include additional sensors. For example, referring to  FIG. 1 , the sensor assembly  24  may include a third sensor  168 , a fourth sensor  170 , and a fifth sensor  172 . For example, referring to  FIG. 1 , the first sensor  162  is in communication with a first portion of the powder sieving system  12  and the second sensor  164  is in communication with a second portion of the of the powder sieving system  12 , e.g., raw reclaimed powder hopper  54 . In this manner, the second sensor  164  is spaced apart from the first sensor  162 . Furthermore, in one exemplary embodiment, the third sensor  168  is in communication with a portion of the filtered reclaimed powder hopper  56 . The third sensor  168  is also configured to monitor the amount of oxygen within the network of passageways  166 . The fourth sensor  170  is in communication with a portion downstream of the virgin powder hopper  132 . The fourth sensor  170  is also configured to monitor the amount of oxygen within the network of passageways  166 . The fifth sensor  172  is in communication with a portion of the oversized powder hopper  72 . The fifth sensor  172  is also configured to monitor the amount of oxygen within the network of passageways  166 . 
     It will be appreciated that in other exemplary embodiments of the present disclosure, the above-described sieving system may have any other suitable configurations. For example, in other exemplary embodiments, a sieving system of the present disclosure may be compatible with other powder reclamation systems and/or may be utilized as a stand-alone system. 
     Moreover, it will be appreciated that in certain exemplary embodiments, the sieving system assembly described herein may not be incorporated into a powder reclamation system, and instead may be a stand-alone sieving system utilized in, e.g., powder manufacturing to obtain desired powder size distributions. 
     For example, referring now to  FIGS. 14 and 15 , a perspective view and straight-on view of a sieving system assembly  212  in accordance with the present disclosure is provided. The exemplary sieving system assembly  212  depicted in  FIGS. 14 and 15  may be configured in substantially the same manner as the exemplary sieving system assembly  12  described above as being incorporated into a powder reclamation system  10 . For example, the exemplary sieving system assembly  212  depicted includes a raw powder hopper  254  (which in the embodiments of the powder reclamation system  10  is a raw reclaimed powder hopper  54 ); a filter housing  232  moveable relative to a support structure  230  by a vibration assembly  290 ; a filtered powder hopper  256  (which in the embodiments of the powder reclamation system  10  is a filtered reclaimed powder hopper  56 ); an oversized powder hopper  272 ; a powder isolation assembly  218  connecting the raw powder hopper  254  to the filter housing  232 , the filter housing  232  to the filtered powder hopper  256 , and the filter housing  232  to the oversized powder hopper  272 ; and a mechanical isolation assembly  257  (having one or more dampers or springs  258  mechanically isolating the filter housing  232  relative to the support structure  230  during operation of the vibration assembly  290 ). Further, although not depicted, the sieving system assembly  212  may further include a powder mass control system, an oxygen sensing system, etc., such as the systems  14 ,  16 ,  20 ,  24  described in detail above. 
     It will be appreciated, however, that for the exemplary sieving system assembly  212  depicted, the sieving system  212  is configured to separate the raw powder into multiple powder distribution sizes. In particular, the exemplary sieving system assembly  212  includes a fine filtered powder hopper  292  for powder below a lower threshold; a middle filtered powder hopper  294  for powder within a size distribution range greater than the lower threshold; and a course filtered powder hopper  296  for powder larger than the size distribution range greater than the lower threshold. It is also contemplated that other configurations of separating raw powder into multiple powder distribution sizes including any number of different sized filtered hoppers may be included with a sieving system  212  of the present disclosure. 
     Specifically, referring now also to  FIG. 16 , providing a close-up, cross-sectional view of a portion of the filter housing  232  of a sieving system assembly  212 , the filter housing  232  includes a first broad frequency filter assembly  274  including a first filter  240  and second filter  242  and a second broad frequency filter assembly  276  also including a first filter  277  and a second filter  278 . The first broad frequency filter assembly  274  is spaced apart from the second broad frequency filter assembly  276  and allows a sieving system assembly  212  of the present disclosure to provide multiple stages of filtering. For example, the first set of filters  274  define a first pore size and the second set of filters  276  define a second pore size. In one embodiment, the second pore size is greater than the first pore size. 
     In an exemplary embodiment, the outlet  236  of the filter housing  232  is a first outlet  236  and the filter housing  232  further defines a second outlet  238  and a third outlet  239 . As described above, the broad frequency filter  214  includes a first set of filters, e.g., a first broad frequency filter assembly  274 , and a second set of filters, e.g., a second broad frequency filter assembly  276 . The first outlet  236  is positioned downstream of the first and second sets of filters  274 ,  276 , the second outlet  238  is positioned upstream of the first set of filters  276  and downstream of the second set of filters  274 , and the third outlet  239  is positioned upstream of the first and second sets of filters  274 ,  276 .  FIG. 17  shows the second outlet  238  that is located between the first set of filters  274  and the second sets of filters  276 . 
     Referring now to  FIG. 20 , a method  500  of reclaiming powder in accordance with an exemplary aspect of the present disclosure is depicted. The exemplary method  500  may be utilized to operate one or more of the exemplary powder reclamation systems and/or sieving systems described above with reference to  FIGS. 1 through 19 . 
     For the exemplary aspect of  FIG. 20 , the method  500  generally includes at ( 502 ) recovering an unused portion of a powder from a metal powder processing device. 
     The method  500  further includes at ( 504 ) providing the unused portion of the powder to a broad frequency filter as described in detail above with reference to one or more of the exemplary powder reclamation systems and/or sieving systems described above with reference to  FIGS. 1 through 19 . 
     For the exemplary aspect depicted, the method  500  further includes at ( 506 ) separating a first portion of the powder larger than a predetermined threshold from a second portion of the powder smaller than the predetermined threshold using the broad frequency filter. For the exemplary aspect depicted, separating the first portion of the powder larger than the predetermined threshold from the second portion of the powder smaller than the predetermined threshold using the broad frequency filter includes at ( 508 ) moving the filter housing relative to the support structure and simultaneously moving the second filter relative to the first filter within the filter housing to restrict the first portion of the powder larger than the predetermined threshold from reaching the outlet of the filter housing and to allow the second portion of the powder smaller than the predetermined threshold to pass through the first filter, the second filter, and the outlet of the filter housing. 
     The method  500  further includes at ( 510 ) recirculating the second portion of the powder back to the metal powder processing device. 
     Referring now to  FIG. 21 , a method  600  of reclaiming powder in accordance with another exemplary aspect of the present disclosure is depicted. The exemplary method  600  may be utilized to operate one or more of the exemplary powder reclamation systems and/or sieving systems described above with reference to  FIGS. 1 through 19 . 
     For the exemplary aspect of  FIG. 21 , the method  600  generally includes at ( 602 ) recovering an unused portion of a powder from a metal powder processing device. 
     The method  600  further includes at ( 604 ) providing the unused portion of the powder to a broad frequency filter as described in detail above with reference to one or more of the exemplary powder reclamation systems and/or sieving systems described above with reference to  FIGS. 1 through 19 . 
     For the exemplary aspect depicted, the method  600  further includes at ( 606 ) controlling a mass of the powder on the broad frequency filter. In a first exemplary aspect depicted, controlling the mass of the powder on the broad frequency filter includes at ( 608 ) determining a first mass of powder at a location upstream of the broad frequency filter and determining a second mass of powder at a location downstream of the broad frequency filter. 
     Referring now to  FIG. 22 , a method  700  of reclaiming powder in accordance with an exemplary aspect of the present disclosure is depicted. The exemplary method  700  may be utilized to operate one or more of the exemplary powder reclamation systems and/or sieving systems described above with reference to  FIGS. 1 through 19 . 
     For the exemplary aspect of  FIG. 22 , the method  700  generally includes at ( 702 ) recovering an unused portion of a powder from a metal powder processing device. 
     The method  700  further includes at ( 704 ) separating a first portion of the recovered unused powder larger than a predetermined threshold from a second portion of the recovered unused powder smaller than the predetermined threshold using a filter, the second portion of the recovered unused powder being a filtered reclaimed powder after passing through the filter. 
     The method  700  further includes at ( 706 ) selectively providing a portion of the filtered reclaimed powder and a virgin powder to a powder recirculation passageway. 
     The method  700  further includes at ( 708 ) providing a mixture of the filtered reclaimed powder and the virgin powder through the powder recirculation passageway and to the metal powder processing device. 
     Referring now to  FIG. 23 , a method  800  of reclaiming powder in accordance with an exemplary aspect of the present disclosure is depicted. The exemplary method  800  may be utilized to operate one or more of the exemplary powder reclamation systems and/or sieving systems described above with reference to  FIGS. 1 through 19 . 
     For the exemplary aspect of  FIG. 23 , the method  800  generally includes at ( 802 ) recovering a first unused portion of a first powder from a first metal powder processing device. The method  800  further includes at ( 804 ) recovering a second unused portion of a second powder from a second metal powder processing device. 
     The method  800  includes at ( 806 ) providing the first unused portion of the first powder and the second unused portion of the second powder to a filter housing of a powder reclamation system comprising a filter as described in detail above with reference to one or more of the exemplary powder reclamation systems and/or sieving systems described above with reference to  FIGS. 1 through 19 . 
     For the exemplary aspect depicted, the method  800  further includes at ( 808 ) separating a first portion of the first and second powders larger than a predetermined threshold from a second portion of the first and second powders smaller than the predetermined threshold using the filter. 
     The method  800  includes at ( 810 ) recirculating a first part of the second portion of the first and second powders back to the first metal powder processing device. The method  800  further includes at ( 812 ) recirculating a second part of the second portion of the first and second powders back to the second metal powder processing device. 
     Referring now to  FIG. 24 , a method  900  of operating a sieving system in accordance with an exemplary aspect of the present disclosure is depicted. The exemplary method  900  may be utilized to operate one or more of the exemplary sieving systems described above with reference to  FIGS. 1 through 19 . 
     For the exemplary aspect of  FIG. 24 , the method  900  generally includes at ( 902 ) providing a carrier gas flow and a mixture flow through a network of passageways of the sieving system, the mixture flow comprising a carrier gas and a reactive metal powder. 
     In an exemplary embodiment, a system of the present disclosure provides a carrier gas flow and a mixture flow through a network of passageways of the system that has a ratio of gas (e.g., in kg) to powder (e.g., in kg) below approximately 1:6. 
     In other exemplary embodiments, a system of the present disclosure provides a carrier gas flow and a mixture flow through a network of passageways of the system that has a ratio of gas (e.g., in kg) to powder (e.g., in kg) below approximately 1:10. 
     In other exemplary embodiments, a system of the present disclosure provides a carrier gas flow and a mixture flow through a network of passageways of the system that has a ratio of gas (e.g., in kg) to powder (e.g., in kg) below approximately 1:5. 
     In other exemplary embodiments, a system of the present disclosure provides a carrier gas flow and a mixture flow through a network of passageways of the system that has other ratios of gas (e.g., in kg) to powder (e.g., in kg). 
     In some exemplary embodiments, a system of the present disclosure includes a first region that provides a carrier gas flow and a mixture flow through a network of passageways of the system that has a first ratio of gas (e.g., in kg) to powder (e.g., in kg) and includes a second region that provides a carrier gas flow and a mixture flow through a network of passageways of the system that has a second ratio of gas (e.g., in kg) to powder (e.g., in kg) that is different than the first ratio. 
     The method  900  further includes at ( 904 ) separating a first portion of the reactive metal powder larger than a predetermined threshold from a second portion of the reactive metal powder smaller than the predetermined threshold within a filter housing of the sieving system using a filter. 
     The method  900  further includes at ( 906 ) determining an amount of oxygen within the powder reclamation system is above a predetermined threshold. 
     The method  900  further includes at ( 908 ) initiating a corrective action in response to determining the amount of oxygen within the powder reclamation system is above the predetermined threshold. 
     Further aspects of the invention are provided by the subject matter of the following clauses: 
     1. A sieving system for a powder, comprising: a support structure; a filter housing movable relative to the support structure, the filter housing defining an inlet and an outlet, the filter housing comprising a broad frequency filter disposed between the inlet and the outlet, the broad frequency filter configured to restrict a first portion of the powder larger than a predetermined threshold from reaching the outlet; and a powder mass control assembly configured to determine data indicative of a powder mass within a portion of the sieving system and control one or more operations of the sieving system based on the determined data indicative of the powder mass. 
     2. The sieving system of any preceding clause, further comprising: a raw reclaimed powder hopper positioned upstream of the inlet of the filter housing; and a filtered reclaimed powder hopper positioned downstream of the outlet of the filter housing. 
     3. The sieving system of any preceding clause, wherein the powder mass control assembly comprises: a first load cell in communication with the raw reclaimed powder hopper, the first load cell configured to measure a first mass of powder within the raw reclaimed powder hopper; and a second load cell in communication with the filtered reclaimed powder hopper, the second load cell configured to measure a second mass of powder within the filtered reclaimed powder hopper. 
     4. The sieving system of any preceding clause, wherein the outlet of the filter housing is a first outlet positioned downstream of the first filter and the second filter, wherein the filter housing further defines a second outlet positioned upstream of the first filter and the second filter for receiving the first portion of the powder larger than the predetermined threshold. 
     5. The sieving system of any preceding clause, further comprising: a raw reclaimed powder hopper positioned upstream of the inlet of the filter housing; a filtered reclaimed powder hopper positioned downstream of the outlet of the filter housing; and an oversized powder hopper positioned downstream of the second outlet of the filter housing. 
     6. The sieving system of any preceding clause, wherein the powder mass control assembly comprises: a first load cell in communication with the raw reclaimed powder hopper, the first load cell configured to measure a first mass of powder within the raw reclaimed powder hopper; a second load cell in communication with the filtered reclaimed powder hopper, the second load cell configured to measure a second mass of powder within the filtered reclaimed powder hopper; and a third load cell in communication with the oversized powder hopper, the third load cell configured to measure a third mass of powder within the oversized powder hopper. 
     7. The sieving system of any preceding clause, wherein the powder mass control assembly is configured to determine data indicative of the powder mass within the portion of the sieving system using the first load cell, the second load cell, and the third load cell. 
     8. The sieving system of any preceding clause, wherein the broad frequency filter comprises: a first filter fixed relative to the filter housing, the first filter being substantially rigid; and a second filter coupled within the filter housing adjacent to the first filter, the second filter being substantially flexible such that the second filter is movable relative to the first filter within the filter housing when the filter housing moves relative to the support structure. 
     9. The sieving system of any preceding clause, wherein the broad frequency filter is configured to restrict the first portion of the powder larger than the predetermined threshold from reaching the outlet and to allow a second portion of the powder smaller than the predetermined threshold to pass therethrough. 
     10. The sieving system of any preceding clause, wherein the second filter defines a maximum deflection from the first filter greater than ¼ inch and less than 5 inches. 
     11. The sieving system of any preceding clause, wherein the filter housing comprises a mounting assembly for mounting the first filter adjacent to the second filter within the filter housing, wherein the filter housing comprises a continuous U-shaped seal extending around an outside edge of the first filter and around an outside edge of the second filter. 
     12. The sieving system of any preceding clause, further comprising: a first motor, wherein the filter housing defines a longitudinal axis, wherein the first motor is a first linear displacement motor along a first displacement axis, wherein the first displacement axis defines a first angle with the longitudinal axis greater than about 15 degrees and less than about 85 degrees. 
     13. The sieving system of any preceding clause, further comprising: a second motor, wherein the second motor is a second linear displacement motor along a second displacement axis, wherein the second displacement axis defines a second angle with the longitudinal axis greater than about 15 degrees and less than about 85 degrees. 
     14. The sieving system of any preceding clause, wherein the first motor is adjustably mounted to adjust an angle between the first displacement axis and the longitudinal axis, and wherein the second motor is adjustably mounted to adjust an angle between the second displacement axis and the longitudinal axis. 
     15. The sieving system of any preceding clause, wherein the sieving system is configured as part of a powder reclamation system for reclaiming powder from a metal powder processing device. 
     16. The sieving system of any preceding clause, wherein the powder is a reactive metal powder. 
     17. The sieving system of any preceding clause, wherein the outlet of the filter housing is a first outlet, wherein the filter housing further defines a second outlet and a third outlet, wherein the broad frequency filter comprises a first set of filters and a second set of filters, wherein the first outlet is positioned downstream of the first and second sets of filters, wherein the second outlet is positioned upstream of the first set of filters and downstream of the second set of filters, and wherein the third outlet is positioned upstream of the first and second sets of filters. 
     18. The sieving system of any preceding clause, wherein the first set of filters defines a first pore size, wherein the second set of filters defines a second pore size, and wherein the second pore size is greater than the first pore size. 
     19. A sieving system for a powder, comprising: a support structure; and a filter housing movable relative to the support structure, the filter housing defining an inlet and an outlet, the filter housing comprising a broad frequency filter disposed between the inlet and the outlet, the broad frequency filter comprising: a first filter fixed relative to the filter housing, the first filter being substantially rigid; and a second filter coupled within the filter housing adjacent to the first filter, the second filter defining a maximum deflection from the first filter greater than ¼ inch and less than 5 inches. 
     20. The sieving system of any preceding clause, wherein the maximum deflection from the first filter is greater than ¼ inch and less than 1 inch. 
     21. The sieving system of any preceding clause, wherein the sieving system is configured as part of a powder reclamation system for reclaiming powder from a metal powder processing device. 
     22. The sieving system of any preceding clause, wherein the powder is a reactive metal powder. 
     23. A method of reclaiming powder comprising: recovering an unused portion of a powder from a metal powder processing device; providing the unused portion of the powder to a broad frequency filter; and controlling a mass of the powder on the broad frequency filter. 
     24. The method of any preceding clause, wherein controlling the mass of the powder on the broad frequency filter comprises: determining a first mass of powder at a location upstream of the broad frequency filter; and determining a second mass of powder at a location downstream of the broad frequency filter. 
     25. The method of any preceding clause, wherein controlling the mass of the powder on the broad frequency filter comprises: determining a first mass of powder within a raw reclaimed powder hopper positioned upstream of the broad frequency filter; and determining a second mass of powder within a filtered reclaimed powder hopper positioned downstream of the broad frequency filter. 
     26. The method of any preceding clause, wherein controlling the mass of the powder on the broad frequency filter further comprises: determining a third mass of powder within an oversized powder hopper in flow communication with the filter housing at a location upstream of the broad frequency filter. 
     27. The method of any preceding clause, wherein the sieving system is configured as part of a powder reclamation system for reclaiming powder from a metal powder processing device. 
     28. The method of any preceding clause, wherein the powder is a reactive metal powder. 
     29. A method of reclaiming powder comprising: recovering an unused portion of a powder from a metal powder processing device; providing the unused portion of the powder to a broad frequency filter of a sieving system; and determining a parameter indicative of a powder mass within a portion of the sieving system. 
     30. The method of any preceding clause, further comprising controlling an operation of the sieving system in response to the determined parameter. 
     This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims. 
     While this disclosure has been described as having exemplary designs, the present disclosure can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the disclosure using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this disclosure pertains and which fall within the limits of the appended claims.