Abstract:
The disclosure relates to a method for adjusting a scoring blade for a board partitioning system for large-format board including the following steps: a. sawing a groove in the board using a saw blade, detecting the sawed groove using a detection device, storing the data; b. displacing the board a feed distance using a feeding device; c. scoring a groove parallel to the sawed groove but at a distance there from, detecting the scored groove using the same detection device as in step a); d. comparing the position of the scored groove and the position of the sawed groove relative to a common reference fixed to the detection device; e. if required: correcting the position of the scoring blade and/or the saw blade orthogonally to the board plane such that the center axes of the scored groove and the sawed groove are approximately equal relative to the common reference fixed to the detection device.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation of International Application No. PCT/EP2007/004042 filed on May 8, 2007. The disclosure of the above application is incorporated herein by reference. 
     
    
     FIELD 
       [0002]    The disclosure relates to a method of operating a panel-sizing system for large-format panels, particularly for the manufacture of furniture. 
       BACKGROUND 
       [0003]    The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. 
         [0004]    From the market, panel-sizing systems are known that have a saw with a sawing blade and a scorer with a scoring blade. By means of such a scorer, a scored groove is made in the region of the surface of a panel-shaped workpiece; but said groove does not sever the workpiece. The actual severing process is carried out by the saw and its saw blade. The width of the scored groove is normally equal to the width of the sawed joint that is produced by the saw, or it is somewhat larger (maximally 0.1 mm) than the width of the sawed joint. Using the scorer prevents the workpiece surface from being torn during the actual severing operation that is performed by the saw. This applies particularly in the case of workpieces with a surface coating. Scorers are also known that have a conical scoring blade, with which the width of the scoring groove is set by means of its depth. 
         [0005]    When producing the scored groove, it is important that this is aligned as exactly as possible with the subsequently introduced sawed joint. It is therefore proposed in DE 195 20 108 A1, that at the start of a sawing process, the saw blade of the saw and the scoring blade of the scorer be measured using sensors, and that the position of the scoring blade relative to the sawing blade be set independently of the measuring result. However, this known device has the disadvantage of being very complex, as well as the disadvantage that the work result, the alignment of the scored groove and the sawed joint, is often not guaranteed. 
       SUMMARY 
       [0006]    We disclose a method by which the alignment between the scored groove and the sawed joint can be set simply and precisely. We also disclose a system to create a corresponding panel-sizing system. 
         [0007]    Features of the disclosure are also shown in the subsequent description and the drawing, whereby these features, by themselves or in various combinations, may be integral to the disclosure, even if that is not explicitly pointed out in individual cases. 
         [0008]    A method of operating a panel-sizing system for large-format panels is disclosed in which a sawed joint is produced by the movement of a saw carriage along a cutting line, whereby during this movement, a scorer with a scoring blade first makes a scored groove in an underside of the panel, and during this movement a saw blade that is arranged, viewed in the direction of sawing, behind the scorer blade and located at least essentially in the plane of the scoring blade, produces the sawed joint, and during which the panel or the stack of panels lies on a supporting table and is moved diagonally to the cutting line for successive sizing by a feed device, characterized in that the method may also includes the following steps:
       a. The making of a sawed joint or joint in the panel by means of the saw blade, detection of the sawed joint or joint using an electronic detection device, storage of the recorded data;   b. The moving of the panels by means of the feed device by a prescribed feed distance;   c. The making of a scored groove in the panel, said groove being parallel to the sawed joint or joint, by means of the scoring blade, detection of the scored groove using the same electronic detection device as in Step a;   d. Comparing of the position of the scored groove and the position of the sawed joint or joint in relation to a common reference that is fixed for the detection device;   e. If necessary, correction of the position of the scoring blade and/or the sawing blade orthogonally to the blade plane, so that the center axes or the scored groove and the sawed joint lie more or less identically compared to the common reference that is fixed for the detection device.       
 
         [0014]    A panel-sizing system for large-format panels is disclosed. The system may include, for example, a supporting table; a saw carriage that can be moved along a cutting line, the carriage having has a saw blade and scoring blade that is arranged at least approximately in the plane of the saw blade; with a feed device for displacing a panel/panels that lie on the supporting table; and with an adjusting device by means of which the position of the scoring blade can be adjusted orthogonally to the blade level; characterized in that it includes a detection device for detecting the work result of scoring blade and saw blade and a control and/or regulating device that are programmed for use in a method according to the principals of the disclosure. 
         [0015]    With the disclosed method and the disclosed panel-sizing system, a costly gauging of the saw blade or the scoring blade is dispensed with. Instead, if deemed necessary, a special adjustment method is simply used. When using this method, as a first step, a sawed joint is made in the underside of a panel. The saw blade is thus adjusted in such a way that it does not sever the workpiece. Or a sawed joint is made in the workpiece, which severs the workpiece at least regionally. For this purpose, the saw blade is set into rotation, and the saw carriage, on which the saw blade and the scoring blade are arranged one after the other, is displaced. For example, when the saw carriage is displaced, or immediately thereafter, the position of the sawed joint, or as the case may be joint, is detected by an electronic detection device. The saw blade is lowered again, the panel is moved forward one feed distance, and then, during another movement of the saw carriage, a scored groove is made on the underside of the workpiece. After the scored groove is made, its position is detected once again by the same detection device. The detected positions are then compared relative to a common reference, and if needed, if an unallowable deviation is detected (greater than a limit value), the position of the scoring blade and/or the saw blade diagonally to the panel level is corrected so that they are aligned as precisely as possible. 
         [0016]    This adjustment process can, for example, be carried out each time the saw blade or the scoring blade is replaced. It is immaterial whether the sawed joint or the scored groove is made first on the underside of the panel. In addition, it should be pointed out at this juncture that the method can be used when there is a single panel lying on the supporting table, or when an entire stack of panels is lying on the supporting table. Regarding the panel used for the proposed method, it can be a panel that is specifically intended for this process, for example a surplus panel from a previous panel-sizing process, or it can be a panel intended for a subsequent partitioning process. 
         [0017]    With a first advantageous further development of the method according to the principles disclosed, it is proposed that the method include the following steps: 
         [0018]    f. Comparison of the width of the scored groove and the width of the saw groove 
         [0019]    g. If required, correction of the width of the scored groove, so that a bilateral overhang of the scored groove beyond the sawed joint has at least an approximately desired value. 
         [0020]    In this way, particularly high cut-quality is achieved, provided that the scoring blade is conical, so that a width adjustment is at all possible. 
         [0021]    It is also proposed that the electronic detection device at least intermittently provide an image of the sawed joint or joint and the scored groove. For this purpose, the detection device can include a reasonably priced monitor, on which the scored groove and the sawed joint or joint can be visualized. In this way, a user of the method can very quickly check the quality of the proposed adjustment method. 
         [0022]    Steps a to d, or as the case may be f and g, may take place automatically. This increases the precision of the adjustment and shortens the time required for it. The corresponding panel-sizing system may have a remote-controlled adjusting device for adjusting the scoring blade vertically to its plane, and the control and regulation device may control the adjusting device and may therefore automatically correct the position of the scoring blade. 
         [0023]    With a fully automated process and a means of visualization, if inconsistent values are detected for the position and/or shape of the sawed joint and joint and/or the scored groove during fully automatic execution of the method, the electronic detection device can simultaneously present the sawed joint or joint and the scored groove, together with the detected positions and/or geometries, so that the user can manually adjust the detected position and/or geometry to the actual position(s) and/or shape/shapes, after which the correction is once again automatically carried out according to Steps e and g. In this way, it is taken into account that when detecting the position and/or shape of the grooves, or of the joints introduced, there inaccuracies can occasionally arise, which can be very quickly eliminated in the proposed manner. 
         [0024]    An additional refinement of the method according to the disclosed principles provides for the sawed joint or joint to be made during a backward movement of the saw carriage. This ensures that the saw teeth of the saw blade cut from the outside into the material and do not, as in the case of forward movement, cut from inside the material outward. With this procedure, making the sawed joint or joint causes less tearing, which also improves the precision of the adjustment method. 
         [0025]    Steps b through d or f can be repeated after step e or else after g to monitor the correction implemented, owing to which the precision of the adjustment process is likewise increased. 
         [0026]    The detection device can be moved together with the saw blade and the scoring blade, for example by arranging the detection device first, then the scoring blade, and then the saw blade on the saw carriage in the direction of sawing. This is particularly cost-efficient. However, the detection device can also be arranged on its own movable carriage, for example, it can be kept in a lateral, resting position during normal sawing operation and therefore be less contaminated. 
         [0027]    In the case of an additional variation of the disclosed method, it is proposed that a sawed joint be made using the saw blade, that the sawed joint be detected by the detection device, and that the quality of the sawed joint, in particular the size and/or number of tears and/or amplitude and frequency of a boundary wave, be assessed. 
         [0028]    In this way, quality control of the split lines produced during normal sawing operation is made possible, so that there can be timely notification, for example, of a dulling of the sawing blade or the scoring blade due to wear, or the necessity of another adjustment of the alignment between sawing blade and scoring blade. 
         [0029]    As camera can, for example, be used as a detection device, which can visualize the scored groove and the sawed joint in a particularly simple manner on a screen. However, a laser scanning device or an ultrasound scanning devices is also possible as a detection device. 
         [0030]    Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. 
     
    
     
       DRAWINGS 
         [0031]    In order that the disclosure may be well understood, there will now be described various forms thereof, given by way of example, reference being made to the accompanying drawings, in which: 
           [0032]      FIG. 1 : is a lateral view of a panel-sizing system with a saw carriage; 
           [0033]      FIG. 2 : is a cut along the line II-II from  FIG. 1 ; 
           [0034]      FIG. 3 : is a perspective representation of a workpiece and a saw carriage from  FIG. 2  with a first procedural step of a method for adjusting a scoring blade to align with a sawing blade; 
           [0035]      FIG. 4 : is a representation similar to  FIG. 3  in connection with a second procedural step; 
           [0036]      FIG. 5 : is a representation similar to  FIG. 3  in connection with a third procedural step; 
           [0037]      FIG. 6 : is a representation similar to  FIG. 3  in connection with a fourth procedural step; 
           [0038]      FIG. 7 : is a representation similar to  FIG. 3  in connection with a fifth procedural step; 
           [0039]      FIG. 8 : is a representation similar to  FIG. 3  in connection with a sixth procedural step; 
           [0040]      FIG. 9 : a first view of a monitor of the panel-sizing system before the procedural step in  FIG. 7 ; 
           [0041]      FIG. 10 : a second view of a monitor after completion of the adjustment procedure; 
           [0042]      FIG. 11 : a top view upon a workpiece with outliers; and 
           [0043]      FIG. 12 : is a section along the line XII-XII of  FIG. 11 . 
       
    
    
       [0044]    The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. 
       DETAILED DESCRIPTION 
       [0045]    The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. 
         [0046]    In  FIG. 1 , a panel-sizing system for large-sized panels has the reference sign  10  overall. It may include a horizontal supporting table  12  with an upper supporting surface  14 , which is also horizontal. A saw blade  16  of a saw  18  is arranged on a saw carriage  20  that is vertically displaceable relative to the drawing plane of  FIG. 1 . With this saw  18 , a large-format panel  22  that is lying on the supporting surface  14  can be partitioned into smaller single panels or panel strips of the kind used, for example, in the production of furniture parts. Only a single panel  22  is shown in  FIG. 1 , however it is understood that the following explanations also apply when an entire stack of panels is lying on the supporting table  12  instead of this one panel. In order to hold the panel  22  securely in position during the sawing operation, a clamping bar  24  that can be lowered vertically is provided above the saw  18 . 
         [0047]    In order to divide the panel  22  into single strips, it is necessary to move the panel  22  in the feed direction (arrow  26 ). For this purpose, a plurality of gripping mechanisms in the form of collets are arranged in one direction parallel to the drawing plane, of which only one is visible in  FIG. 1  with the reference sign  28 . The collets  28  are displaceably held on a position shifter  30  that extends vertically to the plane of the drawing. The latter can, in turn, be moved along two horizontal tracks, only one of which, with the reference sign  32 , is visible in  FIG. 1 , located longitudinally to the feed direction  26 . Together, the collet  28 , the position shifter  30  and the tracks  32 , form a feed device  34 . 
         [0048]    Now the structural assembly of the saw carriage  20  will be explained in detail with reference to  FIG. 2 . First, it is seen that the panel  22  has a pressboard core  36  and a surface coating  38 , on which lies on the supporting surface  14  of the supporting table  12 . 
         [0049]    A scorer  40  with a conical scoring blade  42  is affixed to the saw carriage  20 , in addition to the saw  18  with the saw blade  16 . The scoring blade  42  is driven around an axis  44 , the saw blade  16  around an axis  46 . In the  FIGS. 1 and 2 , the saw carriage  20  is displaceable diagonally to the feed direction  26  in a manner that is not described in more detail; in  FIG. 1 , therefore, vertically to the drawing plane. 
         [0050]    On the saw carriage  20 , there is an electric adjusting device  48 , by means of which, as indicated by a double line  50 , the scoring blade  42  can be displaced orthogonally in relation to its blade plane, and therefore also vertically toward the blade plane of  FIG. 2 , and with which (as is not shown in more detail), the depth of immersion of the scoring blade  42  can be adjusted. In addition, a video camera  52  belonging to a detection device and oriented toward the underside (without reference number) of the panel  22  is affixed to the saw carriage  20 , as indicated by a sighting arrow  54 . Instead of a video camera, a laser scanning device or an ultrasound scanning device could be used. 
         [0051]    The video camera  52  transmits corresponding signals to a control and regulating device  56 , for example a computer, which also includes a monitor  58  and an input device  60 . The control and regulating device  56  is also connected to an evaluation system  62 , whose function will be explained in more detail below. The electric adjusting device  48  is controlled by the control and regulating device  56 , as are the drive assemblies, which are not shown, and which cause the saw blade  16  and the scoring blade  42  to rotate. 
         [0052]    During normal operation of the panel-sizing system  10 , the saw carriage  20  moves along a cutting line in the direction of cutting which is indicated by the arrow  64  in  FIG. 2 . Seen in the cutting direction  64 , the video camera  52  is arranged first on the saw carriage  20 , followed by the scorer  40  and the saw  18 . In a variation that is not shown, the video camera is not deposed on the same saw carriage as the saw and the scorer, but rather on a separate, movable carriage. 
         [0053]    Due to the arrangement of saw  18  and scorer  40  on the saw carriage  20 , the scorer blade  42  first cuts a scored groove  66  in the underside of the panel  22  when the saw carriage  20  moves in the cutting direction  64 . The depth of this scored groove  66  is somewhat greater than the thickness of the surface coating  38  of the panel  22  and depends, due to the conicity of the scoring blade  42 , on the depth of immersion in the panel  22 . Then the saw blade  16  of the saw  18  cuts the actual split line  68  in the panel  22 , by means of which the panel  22  is partitioned into two separate pieces. After this dividing or severing cut, the panel  22  of the feed device  34  is displaced a desired distance in the feed direction  26 , so that the next cut can follow. In this way, the panel  22  is successively partitioned. 
         [0054]    As the  FIGS. 11 and 12  show, the scored groove  66  is usually somewhat wider (width  70 ) than the sawed joint  68  (width  72 ). The center axes of the scored groove  66  and the sawed joint  68  should approximately align, so that the overhang of the scored groove  66  beyond the sawed joint  68  is approximately equal on both sides. Using this procedure avoids damaging the surface coating  38  and creating the so-called “outliers” that are referred to with  74  in the  FIGS. 11 and 12  when making the sawed joint  68 . The reason for the outliers  74  shown in the  FIGS. 11 and 12  is the fact that here, the scored groove  66  and the sawed joint  68  do not align sufficiently well. 
         [0055]    In order to prevent formation of the said outliers  74 , as noted above, the scored groove  66  and the sawed joint  68  align with each other, and that on either side of the scored groove  66 , there is a certain overhang compared to the sawed joint  68 . However, as normal scoring blades  42  have tolerances, the scoring blade  42 , after a change of tool for example, must be readjusted relative to the saw blade  16  in a direction vertical to the blade plane of  FIG. 2  in such a way that the scored groove  66  once again aligns with the sawed joint  68 . For this purpose, an adjustment procedure is carried out in the plate partitioning system  10 , the basis for which is an image of the panel  22  taken by the video camera  52 , and which is therefore the result of the operation of the saw blade  16  and the scoring blade  42 . 
         [0056]    This adjustment procedure is stored as a computer program in a memory of the control and regulating device  56 . The adjustment procedure is not carried out during the normal operation of the panel-sizing system  10 , i.e. when panels are actually supposed to be partitioned, but rather as a separate procedure, for example after replacing the scoring blade  42 . In such cases, it is self evident that the adjustment procedure described below can be carried out on both a “test panel,” which is available in the form of cutting scrap, and a piece of a panel  22  that is intended for subsequent partitioning. 
         [0057]      FIG. 3  shows that with the cited adjustment procedure, a sawed groove  76  is first made in the underside of the panel  22  using the saw blade  16 . 
         [0058]    The use of the term “sawed groove” includes, for example, that the saw blade  16  is adjusted in such a way that the panel  22  is not completely severed. The present adjusting procedure could also be used when, in this step, a sawed joint is made by the sawing blade  16 , instead of a sawed groove. 
         [0059]    The sawed groove  76  is made by first raising the saw blade  16 , corresponding to the arrow  77 , from its resting position, shown in  FIG. 3  with a dashed line, and making it rotate, and then moving the saw carriage  20  in reverse direction  78 , i.e. counter to the sawing direction  64 . With this kind of reverse movement, the saw teeth of the saw blade  16  cut into the material of the panel  22  and do not, as in the case of forward movement in the sawing direction  64 , cut from inside the panel  22  material outward. This has the advantage of creating fewer outliers when making the sawed groove  76 . 
         [0060]    As  FIG. 4  shows, the sawed groove  76  that is created is then detected by the video camera  52 , and its position is evaluated in relation to the axis of sight  54 . The axis of sight  54  is a fixed reference for the detection device, or as the case may be the video camera  52 , to which the detected values are compared. The detected values are stored in a memory of the control and regulating device  56 , as is the image of the sawed groove  76  that is recorded by the video camera  52 . 
         [0061]    In the next step, which is shown in  FIG. 5 , the panel  22  is moved by the feed device  34  a prescribed feed distance D in the feed direction  26 . Then the saw carrier  20  is moved in the sawing direction  64 , and using the scoring blade  42 , a scored groove  66  is made in the underside of the panel  22 . The scored groove  66  is thus parallel to the sawed groove  76 , however at a distance from it. In order to produce the scored groove  66 , the scoring blade  42  is moved from a resting position indicated in  FIG. 5  by a dashed line into the operating position (Arrow  82 ), made to rotate, and the saw carriage  20  is moved in the sawing direction  64 . Now, as can be seen in  FIG. 6 , the saw carriage  20  is moved in the reverse direction  78 , and as this happens, the video camera  52  detects the scored groove  66  that has been made and assesses its position relative to the axis of sight  54  of the video camera  52  and assesses its width. 
         [0062]    The control and regulating device  56  now compares the position of the scored groove  66  with the position of the sawed groove  76 , in each case compared to the axis of sight  54 . When the deviation in the position, for example of the center axis of the scored groove  66  from the corresponding position of the sawed groove  76  reaches a limit value or exceeds it, a correction value for the position of the scoring blade  42  is calculated from this comparison, and on that basis, the position of the scoring blade  42  diagonal to its blade plane is corrected by means of directing the adjustment direction  48  in such a way that the center axes of the scored groove  66 , on the one hand, and the sawed groove  76  on the other, in relation to the common reference that is fixed for the detection direction  52 , i.e. the axis of sight  54 , are approximately the same. Or, for example, the correction is made by making the overhang of the scored groove  66  beyond the sawed groove  76  approximately the same on both sides of the sawed groove  76 . This adjustment of the scoring blade  42  is indicated in  FIG. 7  by a horizontal double arrow  84  that is also orthogonal to the plane of the scoring blade  42 . The comparison with a limit value described above may, however be omitted, and only a correction made instead. 
         [0063]    However, the video camera  52  not only detects the position of the sawed groove  76  and the scored groove  66  compared to the fixed reference  54 , but also their width. The width  70  ( FIG. 11 ) of the scored groove  70  is compared to the width  72  of the sawed groove  76 , and is then, for example, only when the deviation of the detected width from a desired width reaches a limit value or exceeds it, a correction value is given such that a prescribed overhang of the scored groove  66  on either side of the sawed groove  76  is achieved. Because the scoring blade  42  is conical, as stated at the beginning, the width of the scored groove  70  can be adjusted by means of the depth of immersion of the scoring blade  42  in the panel  22 . This correction of the immersion depth is indicated in  FIG. 7  by means of a vertical double arrow  86 . 
         [0064]    In order to check the correction made, as seen in  FIG. 8 , the panel  22  is once again moved the feed distance  80  in the feed direction  26 , the scoring blade  42  is once again lifted out of its resting position in the direction of the arrow  82  and into its working position and made to rotate, and the saw carriage  20  is moved in the sawing direction  64 . In this way, a second scored groove  66 ′ is created, which, as described above in connection with  FIG. 6 , is then detected by the video camera  52  and its position relative to the axis of sight  54  of the video camera  52  assessed. Depending on the result, another correction of the position of the scoring blade  42  according to FIG.  7  might be carried out, or an error message might be sent if a correction does not appear possible. 
         [0065]    The image that the user of the panel-sizing system  10  sees on the monitor  58  is shown in  FIGS. 9 and 10 : the image according to  FIG. 9  appears after the procedural step according to  FIG. 6 , before the position of the scoring blade  42  is corrected. The visual axis  54  that serves as a fixed reference is shown on the monitor as a horizontal line. In the left half of the monitor  58 , the sawed groove  76  is shown, which compared to the rest of the underside of the plate  22  looks comparatively dark, which is indicated by a dotted representation in  FIGS. 9 and 10 . The left side in  FIG. 9  is therefore the picture that is taken by the video camera  52  according to the procedural step in  FIG. 4 . 
         [0066]    In the right half of the monitor  58  according to  FIG. 9 , the scored groove  66  is shown, as it is detected by the video camera  52  in the procedural step shown in  FIG. 6 . In both halves, the detected positions of the boundary lines of the sawed groove  76 , or as the case may be the scored groove  66 , are shown numerically (in micrometers) relative to the axis of sight  54 , and the sum of the two distances of the edges from the axis of sight  54  is also given in each case. At this point, it should be expressly stated once again that the two images shown on the monitor  58  are recorded at different points in time and at different sites, however with the same video camera  52 , and that this is the reason the shape that is visible in these two images can still be compared to the same reference, i.e. the axis of vision  54 . 
         [0067]    It is apparent from the visualization in  FIG. 9  that the scored groove  66  shown on the right side is displaced downward compared to the sawed groove  76 . It therefore does not align in the desired manner with the sawed groove  76 . What is more, the scored groove  66  should have a width of approximately 4800 μm, whereas in the state shown in  FIG. 9 , it has a width of approximately 4925 μm, which even with an adjustment of the scored groove  66  to the sawed groove  76 , would still result in an undesirable overhang value. 
         [0068]    By means of the correction of the orthogonal position of the scorer blade  42  with respect to the blade plane (double arrow  84 ) and by means of the correction of the depth of immersion (double arrow  86 ) described in connection with  FIG. 7 , the position of the scorer groove  66 ′ is corrected as can be seen in  FIG. 10 , on the one hand, in such a way that it is now at least approximately flush with the saw groove  76  concerning the same reference of the visor axis  54 . The width was also corrected in such a way that the scorer groove  66 ′ has now a width of 4799 μm, which leads at least approximately to the desired residues on both sides of the sawing groove  76 . 
         [0069]    The operation described in  FIGS. 3 to 8  may take place fully automatically, controlled by the control and regulating device  56 . The representations according to  FIGS. 9 and 10  may only appear on the monitor  58  when non-conclusive figures are obtained from automatic detection of the position and geometry of the sawed groove  76  and the scored groove  66  using conventional image recognition processes. By means of the visualization that appears on the monitor in this case  58 , the user can decide whether he will use the representation according to  FIG. 9  for a manual, or as the case may be semi-manual adjustment. If necessary, the user can correct the recording of the edges of the scored groove  66  and the sawed groove  76  that is automatically detected, in the sense of image recognition, by the control and regulating device  56 , for example, by moving the edge that is detected by the control and regulating device  56  onto the actual edge that is shown in the image. The subsequent adjustment corresponding to  FIG. 7  is then conducted again automatically, but with reference to the images corrected by the user. 
         [0070]    An evaluation system is also integrated into the control and regulating device  56 , said evaluation system assessing or as the case may be verifying the quality of the scored groove  66  and the sawed groove  76  on the basis of the images that the video camera  52  provides of them. In particular, this kind of evaluation system can assess the size and/or number of outliers  74  (see  FIGS. 11 and 12 ) and/or the amplitude and frequency of a boundary wave. Here too, a precondition may be that the outlier, or as the case may be the boundary wave, is detected by the detection device, for example the video camera  52 , and is recognized in the context of image recognition by the control and regulating device  56 . 
         [0071]    It should be noted that the disclosure is not limited to the variations described and illustrated as examples. A large variety of modifications have been described and more are part of the principles of the disclosure. These and further modifications as well as any replacement by technical equivalents may be added to the description and figures, without leaving the scope of the protection of the disclosure and of the present patent.