Patent Publication Number: US-11383542-B2

Title: Recording system providing a notification on a time to replace an adhesive layer on a transporting belt, recording device, and control method

Description:
The present application is based on, and claims priority from JP Application Serial Number 2019-170206, filed Sep. 19, 2019, the disclosure of which is hereby incorporated by reference herein in its entirety. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a recording system, a recording device, and a control method. 
     2. Related Art 
     JP-A-2006-315824 describes a recording device that includes a transporting belt including an adhesive layer, a recording unit configured to perform recording on a medium stuck on the adhesive layer, and a detection unit for detecting an adhesive force of the adhesive layer. When the transporting belt circles while contacting the adhesive layer, the detection unit rotates as the transporting belt circles. At this time, when the adhesive force of the adhesive layer decreases, the rotational speed of the detection unit decreases. Thus, in the recording device described in JP-A-2006-315824, the adhesive force of the adhesive layer is detected based on the rotational speed of the detection unit. The recording device notifies a replacement time of the adhesive layer, based on a detection result of the detection unit. 
     In the recording device described in JP-A-2006-315824, when the adhesive force of the adhesive layer is detected, the adhesive force of the adhesive layer may decrease due to contact of the detection unit with the adhesive layer. 
     SUMMARY 
     A recording system that solves the above-described problem includes a recording device including a recording unit configured to perform recording onto a medium, a transporting belt including an adhesive layer and configured to transport the medium stuck on the adhesive layer, a drive unit configured to drive the transporting belt, a control unit that includes a detection unit configured to detect a load current flowing in the drive unit and that controls the drive unit. The recording system further includes a peeling device configured to peel the medium from the transporting belt, and a notification device configured to provide a notification. The control unit causes the notification device to provide a notification on a time to replace the adhesive layer, based on a detection result of the detection unit. 
     A recording device that solves the above-described problem is a recording device in which a medium is collected by a peeling device, and the recording device includes a recording unit configured to perform recording onto the medium, a transporting belt including an adhesive layer and configured to transport the medium stuck on the adhesive layer, a drive unit configured to drive the transporting belt, a control unit including a detection unit configured to detect a load current flowing in the drive unit, and configured to control the drive unit, and a notification unit configured to provide a notification, where the control unit causes the notification unit to provide a notification on a time to replace the adhesive layer, based on the load current flowing in the drive unit when the medium is peeled from the transporting belt. 
     A control method that solves the above-described problem is a control method for a recording device including a recording unit configured to perform recording onto a medium, a transporting belt including an adhesive layer and configured to transport the medium stuck on the adhesive layer, and a drive unit configured to drive the transporting belt, and includes detecting a load current flowing in the drive unit when the medium is peeled from the transporting belt, and providing a notification on a time to replace the adhesive layer, based on a value of the detected load current. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a block diagram illustrating one exemplary embodiment of a recording system. 
         FIG. 2  is a side view schematically illustrating a recording system. 
         FIG. 3  is a schematic diagram illustrating one example of a change screen. 
         FIG. 4  is a flowchart illustrating one example of detection processing. 
         FIG. 5  is a flowchart illustrating one example of setting processing. 
         FIG. 6  is a block diagram illustrating a modified example of a recording device. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     One exemplary embodiment of a recording system will be described below with reference to the accompanying drawings. 
     As illustrated in  FIG. 1 , a recording system  11  includes a recording device  12 , a peeling device  13 , and a notification device  14 . The recording system  11  according to the present exemplary embodiment includes a holding device  15 , a tension adjustment device  16 , and a terminal device  40  capable of communicating with the recording device  12 . 
     The notification device  14  according to the present exemplary embodiment includes a display unit  17  and an input unit  18 . 
     The display unit  17  displays information. The display unit  17  is, for example, a liquid crystal display. The notification device  14  notifies a user by displaying various types of information on the display unit  17 . 
     The input unit  18  is configured to receive an input of an instruction. Thus, when the user operates the recording system  11 , the user inputs an instruction to the input unit  18 . The instruction input to the input unit  18  is input to the recording device  12  through the notification device  14 . 
     The input unit  18  is, for example, a touch panel. Thus, in the present exemplary embodiment, the display unit  17  and the input unit  18  are integrally formed. The input unit  18  may be, for example, a mouse, a keyboard, or the like. 
     The recording device  12  is, for example, an ink jet-type printer that records an image such as characters and photographs on a medium  99  such as a fiber and a sheet by discharging ink, which is one example of a liquid. 
     The recording device  12  includes a control unit  20 . The control unit  20  comprehensively controls the recording device  12 , for example. The control unit  20  can communicate with the peeling device  13 , the notification device  14 , the holding device  15 , the tension adjustment device  16 , and the terminal device  40 . The control unit  20  may control the peeling device  13 , the notification device  14 , the holding device  15 , the tension adjustment device  16 , and the terminal device  40 . 
     The terminal device  40  includes a communication unit  41  for communicating with the recording device  12 , and a storage unit  42  configured to store software for editing image data to be transmitted to the recording device  12 . The communication unit  41  can transmit job data and various types of data related to image data to the recording device  12  via a wired or wireless network. The storage unit  42  includes a non-volatile storage medium such as an SSD and an HDD, and can store image data and various types of data. Further, the terminal device  40  is electrically coupled to the notification device  14 , and can perform editing of image data and the like via the notification device  14 . 
     Note that the notification device  14  may be included in the terminal device  40  or may be independent of the terminal device  40 . When the notification device  14  is independent of the terminal device  40 , the notification device  14  can perform information communication with the terminal device  40  by using a communication cable or the like. 
     The control unit  20  can be constituted as α: one or more processors configured to execute various types of processing in accordance with a computer program, β: one or more dedicated hardware circuits configured to execute at least a part of processing of various types of processing, such as an application specific integrated circuit, or γ: a circuit including a combination thereof. The processor includes a CPU and a memory such as a RAM and a ROM, and the memory is configured to store a program code or a command configured to cause the CPU to execute the processing. The memory, namely, a computer readable medium includes any readable medium that can be accessed by a general-purpose or dedicated computer. 
     The control unit  20  includes a detection unit  21 . The detection unit  21  is, for example, a motor driver. In this case, in the control unit  20 , the motor driver and the processor may be disposed on the same chip, or may be disposed on different chips. An operation of the control unit  20  including the detection unit  21  will be described below in detail. 
     As illustrated in  FIG. 2 , the recording device  12  includes a recording unit  22 , a transporting belt  23 , a driving roller  24 , a drive unit  25 , and a driven roller  26 . The recording device  12  according to the present exemplary embodiment includes a pressing portion  27 , a cleaning portion  28 , and a drying portion  29 . 
     The recording unit  22  discharges liquid onto the medium  99 , for example. As a result, the recording unit  22  performs recording on the medium  99 . The recording unit  22  is, for example, a head. The recording unit  22  may be a serial head that scans with respect to the medium  99 , or may be a line head that extends across approximately the same range as a width of the medium  99 . 
     Note that the recording unit  22  is not limited to an ink jet-type, and may be an electrophotographic type in which an image and the like are fixed to the medium  99  by various photosensitive means after applying a solid toner. 
     The recording device  12  includes a transporting unit  2 . The transporting unit  2  includes the transporting belt  23 , the driving roller  24 , and the driven roller  26 . The transporting belt  23  includes a base material  31  and an adhesive layer  32 . 
     The base material  31  is provided in an endless shape. The base material  31  includes a first surface  33  and a second surface  34  being a surface opposite to the first surface  33 . The first surface  33  is a surface serving as an outer circumferential surface of the base material  31 . The second surface  34  is a surface serving as an inner circumferential surface of the base material  31 . 
     The adhesive layer  32  is provided on the first surface  33 . The adhesive layer  32  has adhesion. The adhesive layer  32  is formed of an adhesive having adhesion. The adhesive layer  32  is formed by applying the adhesive onto the first surface  33 . The adhesive layer  32  is formed around the entire circumference of the first surface  33 . An adhesive force of the adhesive layer  32  decreases with use of the recording device  12 , a passage of time, and the like. 
     The adhesive layer  32  is a layer to which the medium  99  is stuck. In other words, the transporting belt  23  transports the medium  99  stuck on the adhesive layer  32 . The medium  99  is recorded by the recording unit  22  while being transported by the transporting belt  23 . Thus, the recording unit  22  is located so as to face the first surface  33  with respect to the base material  31 . The recording unit  22  according to the present exemplary embodiment is located above the transporting unit  2 . 
     The transporting belt  23  is provided in an endless shape. The transporting belt  23  according to the present exemplary embodiment is wound onto the driving roller  24  and the driven roller  26 . As a result, the second surface  34  in the base material  31  contacts the driving roller  24  and the driven roller  26 . The transporting belt  23  transports the medium  99  by circling. The transporting belt  23  circles around the driving roller  24  and the driven roller  26 . In other words, the transporting belt  23  rotates about a central point of a virtual straight line that couples from the center of rotation of the driving roller  24  to the center of rotation of the driven roller  26 . 
     The driving roller  24  is configured to be rotatable. The driving roller  24  is coupled to the drive unit  25 . 
     The drive unit  25  is, for example, a motor. When the drive  25  drives, the driving roller  24  rotates. When the driving roller  24  rotates, the transporting belt  23  circles. In this way, the drive unit  25  transmits a driving force to the driving roller  24 , and drives the transporting belt  23 . The drive unit  25  according to the present exemplary embodiment can rotate the driving roller  24  in both directions of a first direction and a second direction being an opposite direction from the first direction. In other words, the transporting belt  23  can circle in both directions of a direction of transporting the medium  99  and a direction of reverse-transporting the medium  99 . 
     The drive unit  25  includes an encoder  35 . The encoder  35  is configured to detect the amount of rotation, a rotational speed, and the like of the driving roller  24 . The encoder  35  allows the driving roller  24  to rotate accurately. 
     The driven roller  26  is configured to be rotatable. The driven roller  26  is driven as the transporting belt  23  circles. In other words, the driven roller  26  rotates with rotation of the drive roller  24 . 
     The pressing portion  27  is located outside the transporting unit  2 . As a result, the pressing portion  27  is located so as to face the first surface  33  with respect to the base material  31 . The pressing portion  27  according to the present exemplary embodiment is located above the transporting unit  2 . 
     The pressing portion  27  presses the medium  99  against the transporting belt  23 . As a result, the medium  99  is stuck on the adhesive layer  32 . The pressing portion  27  according to the present exemplary embodiment presses the medium  99  downward toward the transporting belt  23 . The pressing portion  27  sequentially bonds the medium  99  to the adhesive layer  32  by the transporting belt  23  circling. 
     The pressing portion  27  is, for example, a rod. The pressing portion  27  may be a roller. The pressing portion  27  effectively bonds the medium  99  to the adhesive layer  32  by reciprocating in a predetermined distance on the circumferential surface of the transporting belt  23 , for example. 
     The cleaning portion  28  is located outside the transporting unit  2 . Thus, the cleaning portion  28  is located so as to face the first surface  33  with respect to the base material  31 . The cleaning portion  28  according to the present exemplary embodiment is located below the transporting unit  2 . 
     The cleaning portion  28  cleans the adhesive layer  32  by contacting the adhesive layer  32 . The cleaning portion  28  according to the present exemplary embodiment contacts the transporting belt  23  from below. The cleaning portion  28  includes a brush that contacts the adhesive layer  32 , for example. The cleaning portion  28  sequentially cleans the adhesive layer  32  by the transporting belt  23  circling. 
     In the recording device  12 , as the recording unit  22  performs recording on the medium  99 , the liquid may adhere to the adhesive layer  32 . The cleaning portion  28  cleans the adhesive layer  32  in order to remove the liquid adhering to the adhesive layer  32 . 
     The cleaning portion  28  according to the present exemplary embodiment cleans the adhesive layer  32  by using a cleaning liquid. The cleaning portion  28  cleans the adhesive layer  32  by, for example, bringing a brush wet with the cleaning liquid into contact with the adhesive layer  32 . As a result, the liquid adhering to the adhesive layer  32  is effectively removed. In this case, when the cleaning portion  28  cleans the adhesive layer  32 , the transporting belt  23  gets wet with the cleaning liquid. The cleaning liquid is, for example, water. 
     The drying portion  29  is located outside the transporting unit  2 . Thus, the drying portion  29  is located so as to face the first surface  33  with respect to the base material  31 . The drying portion  29  according to the present exemplary embodiment is located below the transporting unit  2 . 
     The drying portion  29  dries the adhesive layer  32  wet with the cleaning liquid. The drying portion  29  dries the adhesive layer  32  by, for example, blowing hot air onto the transporting belt  23 . The drying portion  29  according to the present exemplary embodiment blows hot air from below the transporting belt  23 . The drying portion  29  sequentially dries the adhesive layer  32  wet with the cleaning liquid by the transporting belt  23  circling. 
     Next, a series of operations of the recording device  12  will be described while focusing on a specific region of the circumferential surface of the transporting belt  23 . 
     First, the pressing portion  27  presses the medium  99  against the specific region of the circumferential surface of the transporting belt  23 . Next, the recording unit  22  performs recording on the medium  99  stuck on the specific region. Next, the medium  99  stuck on the specific region is peeled from the transporting belt  23  by the peeling device  13 . Next, the cleaning portion  28  cleans the specific region. Next, the drying portion  29  dries the specific region. Next, the pressing portion  27  presses the medium  99  again against the specific region. In this way, an image is sequentially recorded on the medium  99  by the transporting belt  23  circling. 
     Next, the holding device  15 , the tension adjustment device  16 , and the peeling device  13  will be described. 
     The holding device  15  holds a roll body on which the medium  99  is wound. The holding device  15  rotatably holds the roll body. The roll body held by the holding device  15  is a first roll body R 1  on which the medium  99  before recording is wound. In the present exemplary embodiment, by driving the transporting belt  23 , the medium  99  is unwound from the first roll body R 1  held by the holding device  15 . The unwound medium  99  is transported from the holding device  15  toward the recording device  12 . 
     The tension adjustment device  16  includes, for example, a contact member  36  and an elastic member  37 . The contact member  36  contacts the medium  99  between the holding device  15  and the recording device  12 . The contact member  36  according to the present exemplary embodiment contacts a surface of the medium  99  on which the recording unit  22  performs recording. The contact member  36  may be, for example, a cylindrical rod or a roller. 
     The elastic member  37  has elasticity. The elastic member  37  is attached to the contact member  36 . The elastic member  37  is, for example, a spring. The elastic member  37  stretches and contracts according to magnitude of tension applied to the medium  99  between the holding device  15  and the recording device  12 . In other words, when the tension applied to the medium  99  is great, the elastic member  37  contracts. When the tension applied to the medium  99  is small, the elastic member  37  stretches. In this way, the tension adjustment device  16  adjusts the tension of the medium  99  between the holding device  15  and the recording device  12  to be substantially constant. 
     The peeling device  13  holds the roll body on which the medium  99  is wound. The peeling device  13  rotatably holds the roll body. The roll body held by the peeling device  13  is a second roll body R 2  on which the medium  99  is wound after the medium  99  passes through the recording device  12 . In the recording system  11 , the peeling device  13  winds the medium  99  from the recording device  12 . In other words, the peeling device  13  collects the medium  99 . A driving force from a drive source (not illustrated), such as a motor, is transmitted to the peeling device  13 , and the peeling device  13  winds the medium  99  from the recording device  12  with a predetermined rotational torque. 
     The peeling device  13  peels the medium  99  from the transporting belt  23 . The peeling device  13  according to the present exemplary embodiment peels the medium  99  from the transporting belt  23  by rotating the second roll body R 2 . Specifically, the peeling device  13  peels the medium  99  at a peeling point P of the circumferential surface of the transporting belt  23  on the driven roller  26 . Since a predetermined tension is applied to a medium  99 B, which is a part of the medium  99  from the peeling point P to the peeling device  13 , there is substantially no slack in the medium  99 B. Here, a part of the medium  99  that is stuck on the adhesive layer  32  upstream of the peeling point P in the circling direction of the transporting belt  23  is referred to as a medium  99 A. At this time, in the vicinity of the peeling point P, an angle formed by the medium  99 A and the medium  99 B, namely, a peeling angle θ is less than 90 degrees. In the present exemplary embodiment, the peeling angle θ decreases as the adhesive force of the adhesive layer  32  increases. 
     A tension T based on the adhesive force acting between the adhesive layer  32  and the medium  99  acts on the medium  99 B being a part of the medium  99 . The tension force T acts toward the peeling device  13  from the peeling point P. Here, since the peeling angle θ is less than 90 degrees, a component TA of components of the tension T along the medium  99 A approaches the direction of reverse-transporting the medium  99 . The component TA along medium  99 A is represented by T×cosθ. At this time, in other words, in a case in which a slippage does not occur between the driving roller  24  and the transporting belt  23 , when the medium  99  is peeled from the transporting belt  23  by the peeling device  13 , torque based on the component TA along the medium  99 A acts so as to resist rotational torque of the driving roller  24 . Therefore, the peeling of the medium  99  from the transporting belt  23  by the peeling device  13  is the resistance of the circling transporting belt  23 . In other words, when the peeling device  13  peels the medium  99  from the transporting belt  23 , a load is generated on the drive unit  25 . When a load is generated on the drive unit  25 , a load current corresponding to magnitude of the load flows to the drive unit  25 . 
     The resistance that occurs in the drive unit  25  by the medium  99  being peeled from the transporting belt  23  increases as the adhesive force of the adhesive layer  32  increases. As a result, as the adhesive force of the adhesive layer  32  increases, a load current flowing in the drive unit  25  in order for the transporting belt  23  to output a target transport speed increases. Conversely, as the adhesive force of the adhesive layer  32  decreases, a load current flowing in the drive unit  25  in order for the transporting belt  23  to output a target transport speed decreases. In this way, when the medium  99  is peeled from the transporting belt  23 , a load current corresponding to magnitude of the adhesive force flows to the drive unit  25 . In other words, the load current is a current supplied to the drive unit  25  in order for the transporting belt  23  to output a target transport speed. 
     Next, an operation of the control unit  20  including the detection unit  21  will be described. 
     The control unit  20  controls the drive unit  25 . The control unit  20  according to the present exemplary embodiment controls not only the drive unit  25 , but also other configurations. By control of the control unit  20 , the transporting belt  23  circles at a predetermined speed. As a result, the medium  99  is transported at a predetermined speed. The predetermined speed refers to a predetermined target transport speed. 
     The detection unit  21  detects a load current flowing in the drive unit  25 . The control unit  20  causes the notification device  14  to notify a replacement time of the adhesive layer  32 , based on a detection result of the detection unit  21 . The detection result of the detection unit  21  is a load current flowing in the drive unit  25 . In other words, the control unit  20  transmits a signal related to a replacement time of the adhesive layer  32  to the notification device  14 , based on a load current flowing in the drive unit  25  when the medium  99  is peeled from the transporting belt  23 . As a result, the notification device  14  notifies the replacement time of the adhesive layer  32 . 
     When the adhesive force of the adhesive layer  32  decreases, the medium  99  is not correctly held on the transporting belt  23 , and thus recording quality may be affected. Thus, the control unit  20  prompts the user to replace the adhesive layer  32  at appropriate timing by notifying a replacement time of the adhesive layer  32 . 
     Note that, as a replacement operation of the adhesive layer  32 , a new adhesive may be applied after all the old adhesive layer  32  remaining on the first surface  33  is removed by an organic solvent or the like, or a new adhesive may be added to a state where the old adhesive layer  32  remains on the first surface  33 . 
     For example, when a load current detected by the detection unit  21  is greater than a set value, the control unit  20  causes the notification device  14  to notify a period of time in which the current adhesive layer  32  can be used, based on the load current. In this case, for example, the control unit  20  causes the display unit  17  to display the period of time in which the adhesive layer  32  can be used. The control unit  20  causes the display unit  17  to display, for example, a basis weight, an area, and the like of the recordable medium  99  as the period of time in which the adhesive layer  32  can be used. As a result, the user can realize when a replacement time of the adhesive layer  32  is. Alternatively, the user can realize how much more the medium  99  can be recorded in a state of a current adhesive force of the adhesive layer  32 . In other words, when a load current detected by the detection unit  21  is greater than the set value, the control unit  20  causes the notification device  14  to notify when a replacement time of the adhesive layer  32  is. 
     Note that it is preferable that a correspondence relationship between an adhesive force of the adhesive layer  32 , namely, a value of a load current, and a basis weight and an area of the recordable medium  99  is evaluated in advance by experimentation, simulations, or the like, and is stored as a correspondence table in a memory such as a RAM and a ROM and the storage unit  42  of the terminal device  40 . 
     As a display representing a period of time in which the adhesive layer  32  can be used, a recommended period of time until replacement of the adhesive layer  32  is performed, a basis weight and an area of the recordable medium  99 , and a gauge representing a level of an adhesive force, a warning display, and the like may be displayed. As the warning display, how much the adhesive force is currently decreasing is displayed on a gauge of a maximum adhesive force, and a message that recommends replacement of the adhesive layer  32  is then output. In this way, replacement of the adhesive layer  32  can be prevented from being performed at an unexpected timing by the user previously realizing when replacement of the adhesive layer  32  needs to be performed. Such a display can be displayed based on the correspondence table described above. 
     For example, when a load current detected by the detection unit  21  is equal to or less than the set value, the control unit  20  causes the notification device  14  to make a notification so as to prompt replacement of the adhesive layer  32 . In this case, for example, the control unit  20  causes the display unit  17  to display a message that prompts replacement of the adhesive layer  32 . As a result, the user can realize that a replacement time of the adhesive layer  32  is now, for example. In other words, when a load current detected by the detection unit  21  is equal to or less than the set value, the control unit  20  causes the notification device  14  to notify that a replacement time of the adhesive layer  32  is now. 
     The set value may be changeable by the user. In the present exemplary embodiment, the set value can be changed through the input unit  18 . In the present exemplary embodiment, any of a first set value, a second set value, and a third set value can be set as the set value. The first set value is greater than the second set value, and the second set value is greater than the third set value. 
     As illustrated in  FIG. 3 , in the present exemplary embodiment, when the set value is changed, the display unit  17  displays a change screen  50 . The change screen  50  is a screen for changing the set value. In the change screen  50  according to the present exemplary embodiment, a first check box  51 , a second check box  52 , a third check box  53 , an OK button  54 , and a cancel button  55  are displayed. 
     The first check box  51  corresponds to a first set value. In the change screen  50 , for example, “high replacement frequency” is displayed next to the first check box  51 . In other words, when the first set value is set and a load current is equal to or less than the first set value, replacement of the adhesive layer  32  is prompted. The first set value is a value greater than the second set value and the third set value. Thus, when the first set value is set, a replacement frequency of the adhesive layer  32  increases. A state of a great adhesive force of the adhesive layer  32  is maintained by increasing the replacement frequency of the adhesive layer  32 , and thus a state where recording quality is high can be maintained. 
     The second check box  52  corresponds to the second set value. In the change screen  50 , for example, “medium replacement frequency” is displayed next to the second check box  52 . In other words, when the second set value is set and a load current is equal to or less than the second set value, replacement of the adhesive layer  32  is prompted. 
     The third check box  53  corresponds to the third set value. In the change screen  50 , for example, “low replacement frequency” is displayed next to the third check box  53 . In other words, when the third set value is set and a load current is equal to or less than the third set value, replacement of the adhesive layer  32  is prompted. The third set value is a value smaller than the first set value and the second set value. Thus, when the third set value is set, a replacement frequency of the adhesive layer  32  decreases. One adhesive layer  32  can be used for an extended period of time by decreasing the replacement frequency of the adhesive layer  32 . As a result, consumption of an adhesive can be suppressed. 
     The OK button  54  is a button that reflects a change in the set value. In other words, when the OK button  54  is pressed while any of the first check box  51 , the second check box  52 , and the third check box  53  is selected, the set value is changed. 
     The cancel button  55  is a button that cancels a change in the set value. When the cancel button  55  is pressed, the change screen  50  is closed. 
     In the present exemplary embodiment, the set value is a value determined with reference to a maximum load current, but may be a predetermined value. The maximum load current is a load current detected first for the adhesive layer  32  in detecting the adhesive force of the adhesive layer  32 . In other words, the maximum load current is an initial value of a load current detected for the adhesive layer  32  in detecting the adhesive force of the adhesive layer  32 . 
     The adhesive force of the adhesive layer  32  decreases as time passes. Therefore, a load current detected first is the greatest load current among a plurality of load currents detected for the adhesive layer  32  in detecting the adhesive force of the adhesive layer  32 . The load current detected first is referred to as a maximum load current. 
     When the set value is determined with reference to the maximum load current, for example, the first set value may be set to a value of 80% of the maximum load current. For example, the second set value may be set to a value of 60% of the maximum load current. For example, the third set value may be a value of 40% of the maximum load current. 
     Next, one example of detection processing executed by the control unit  20  will be described. The control unit  20  according to the present exemplary embodiment executes the detection processing of detecting the adhesive force of the adhesive layer  32  simultaneously with recording of an image. 
     As illustrated in  FIG. 4 , in step S 11 , the control unit  20  detects a load current flowing in the drive unit  25 . At this time, the control unit  20  detects the load current flowing in the drive unit  25  when the medium  99  is peeled from the transporting belt  23 . For example, the control unit  20  detects the load current for a predetermined period of time. The control unit  20  may acquire an average value of the load current detected over the predetermined period of time, or may acquire the greatest value from the load current detected over the predetermined period of time. 
     In step S 12 , the control unit  20  calculates a replacement time of the adhesive layer  32 , based on a detection result of the detection unit  21 . In other words, in step S 12 , the control unit  20  calculates a replacement time of the adhesive layer  32 , based on the value acquired in step S 11 . The control unit  20  according to the present exemplary embodiment refers to a set value in step S 12 . 
     In step S 13 , the control unit  20  causes the notification device  14  to notify the calculated replacement time of the adhesive layer  32 . At this time, the control unit  20  transmits a signal related to the replacement time of the adhesive layer  32  to the notification device  14 . In other words, in steps S 12  and S 13 , the control unit  20  causes the notification device  14  to notify the replacement time of the adhesive layer  32 , based on a value of the detected load current. When the processing in step S 13  is finished, the control unit  20  ends the processing. 
     Next, one example of setting processing executed by the control unit  20  will be described. The control unit  20  executes the setting processing of setting a set value, for example, when the adhesive layer  32  is replaced. The control unit  20  according to the present exemplary embodiment executes the setting processing when completion of the replacement of the adhesive layer  32  is input to the input unit  18 . In the present exemplary embodiment, the recording unit  22  does not operate during execution of the setting processing. 
     As illustrated in  FIG. 5 , in step S 21 , the control unit  20  drives the drive unit  25  and the peeling device  13 . The transporting belt  23  circles by driving the drive unit  25 . The second roll body R 2  rotates by driving the peeling device  13 . The medium  99  is sequentially peeled from the transporting belt  23  by driving the drive unit  25  and the peeling device  13 . 
     In step S 22 , the control unit  20  detects a load current flowing in the drive unit  25 . At this time, the recording unit  22  does not perform recording on the medium  99 . Thus, in step S 22 , while an operation of the recording unit  22  is stopped, the control unit  20  detects the load current flowing in the drive unit  25  when the medium  99  is peeled from the transporting belt  23  by the peeling device  13 . The load current detected in step S 22  is a maximum load current for the replaced adhesive layer  32 . 
     In step S 23 , the control unit  20  sets a set value, based on a detection result of the detection unit  21 . In other words, the control unit  20  sets a set value with reference to the maximum load current acquired in step S 22 . For example, the control unit  20  sets 80% of the maximum load current as the set value. When the processing in step S 23  is finished, the control unit  20  ends the processing. 
     Next, the functions and effects of the exemplary embodiment described above will be described. 
     (1) When the medium  99  is peeled from the transporting belt  23  by the peeling device  13 , a load is generated on the drive unit  25 . The load generated on the drive unit  25  appears as a load current flowing in the drive unit  25 . The load generated on the drive unit  25  increases as an adhesive force of the adhesive layer  32  increases. Thus, the load current increases as the adhesive force of the adhesive layer  32  increases. In other words, when the adhesive force of the adhesive layer  32  decreases, the load current decreases. 
     In the exemplary embodiment described above, the control unit  20  includes the detection unit  21  configured to detect a load current flowing in the drive unit  25 . The control unit  20  can detect an adhesive force of the adhesive layer  32  by detecting the load current flowing in the drive unit  25 . In other words, the control unit  20  can detect the adhesive force without affecting the adhesive layer  32 . Therefore, the recording system  11  can detect the adhesive force without decreasing the adhesive force of the adhesive layer  32 . 
     (2) When completion of replacement of the adhesive layer  32  is input to the input unit  18 , the control unit  20  detects a load current flowing in the drive unit  25  in a case in which the medium  99  is peeled from the transporting belt  23  by the peeling device  13  while an operation of the recording unit  22  is stopped. According to this configuration, when the adhesive layer  32  is replaced, the control unit  20  detects an adhesive force of the replaced new adhesive layer  32 . In other words, the control unit  20  detects an initial value of the adhesive force of the new adhesive layer  32 . As a result, the control unit  20  can detect a degree of decrease in the adhesive force with reference to the initial value of the adhesive force. 
     (3) A set value can be changed through the input unit  18 . In this case, timing for prompting replacement of the adhesive layer  32  is changed by changing the set value. As a result, usability of a user improves. 
     (4) The recording system  11  includes the tension adjustment device  16  configured to adjust a tension of the medium  99  between the holding device  15  and the recording device  12  to be constant. In this case, by the tension adjustment unit  16  adjusting the tension of the medium  99  to be constant, a load generated on the drive unit  25  is constant by the medium  99  being unwound from the first roll body R 1  regardless of the remaining amount of the medium  99 . As a result, the control unit  20  can accurately detect the adhesive force, based on a load current. 
     In a case in which the recording system  11  does not include the tension adjustment device  16 , a load current fluctuates in accordance with a weight of the first roll body R 1 . For example, when the first roll body R 1  has a great weight, it is difficult to unwound the medium  99  from the first roll body R 1 , and thus a load applied to the drive unit  25  increases. For example, when the first roll body R 1  has a small weight, the medium  99  is easily unwound from the first roll body R 1 , and thus a load applied to the drive unit  25  decreases. Thus, when the recording system  11  does not include the tension adjustment device  16 , a load current easily fluctuates in accordance with a weight of the first roll body R 1 . 
     In the exemplary embodiment described above, in addition to a weight of the first roll body R 1 , contact of the pressing portion  27  with respect to the transporting belt  23 , contact of the cleaning portion  28  with respect to the transporting belt  23 , and the like are factors that provide a resistance to the drive unit  25 . However, the pressing portion  27  and the cleaning portion  28  contact the transporting belt  23  with a constant force. As a result, contact of the pressing portion  27  and the cleaning portion  28  is less likely to contribute to a fluctuation in load current. 
     The present exemplary embodiment described above may be modified as follows. The present exemplary embodiment and modified examples thereof to be described below may be implemented in combination within a range in which a technical contradiction does not arise.
         As illustrated in  FIG. 6 , the recording device  12  may include a notification unit  61  configured to make a notification. The notification unit  61  has the same function as that of the notification device  14 . In this case, the recording system  11  may not include the notification device  14 . In other words, instead of the notification device  14 , the notification unit  61  may notify a replacement time of the adhesive layer  32 . The notification unit  61  may include a display unit  62  configured to display information, and an input unit  63  configured to receive an input of an instruction. The recording device  12  can acquire an effect similar to that of the recording system  11  described above.   The notification device  14  is not limited to being displayed by the display unit  17 , and may notify a replacement time of the adhesive layer  32  by producing a sound.   The control unit  20  may cause a replacement time to be notified, based on a plurality of set values. In this case, for example, when a detection result of the detection unit  21  is equal to or less than the first set value, the control unit  20  may notify a usable period of the adhesive layer  32  and, when a detection result of the detection unit  21  is equal to or less than the second set value, the control unit  20  may make a notification that prompts replacement of the adhesive layer  32 .   The drive unit  25  and the peeling device  13  may be synchronized. In this case, the peeling device  13  rotates the second roll body R 2  as the drive unit  25  is driven. As a result, the medium  99  is peeled from the transporting belt  23  without the peeling device  13  being controlled by the control unit  20 .   The drive unit  25  and the holding device  15  may be synchronized. In this case, the holding device  15  rotates the first roll body R 1  as the drive unit  25  is driven. A tension of the medium  99  can be adjusted by rotation of the first roll body R 1 . Thus, in the modified example, the tension adjustment device  16  is not necessary.   The structure of the tension adjustment device  16  is not limited to the exemplary embodiment described above. For example, a friction rod on which the medium  99  is wound may be employed as the tension adjustment device  16 . The friction rod is acquired by attaching a high friction member such as rubber to a surface of a rod-like member or a cylindrical member made of metal, for example. An extension direction of the friction rod is parallel to an extension direction of the driving roller  24 . The friction rod extends over a range greater than a maximum width of the medium  99  used in the recording device  12 , and is also fixed so as not to rotate. In order to make the amount of the medium  99  wound on the friction rod constant, at least two guide rollers are preferably provided offset from a position of the friction roller in the recording device  12 . In this way, by using a so-called Euler&#39;s belt theory, a tension acting on the medium  99  between the friction rod and the recording device  12  in the feeding direction of the medium  99  can be sufficiently greater than a tension acting on the medium  99  between the friction rod and the holding device  15 . As a result, even when the tension acting on the medium  99  between the friction rod and the holding device  15  fluctuates by the size of the first roll body R 1  decreasing as the medium  99  is used, an influence of the fluctuation is absorbed in a sufficiently great tension acting on the medium  99  between the friction rod and the holding device  15 , and the tension acting on the medium  99  between the friction rod and the recording device  12  can be substantially constant.       

     Note that the structure of the tension adjustment device  16  is not particularly limited as long as the structure has an effect of making the tension of the medium  99  between the recording device  12  and the holding device  15  substantially constant.
         The recording device  12  is not be limited to setting a set value from three of the first set value, the second set value, and the third set value, and may be configured so as to set a set value from four or more values.   The liquid discharged by the recording unit  22  is not limited to ink, and may be, for example, a liquid material including particles of a functional material dispersed or mixed in liquid. For example, the recording unit  22  may discharge a liquid material including a material such as an electrode material or a pixel material used in manufacture of a liquid crystal display, an electroluminescent (EL) display, and a surface emitting display in a dispersed or dissolved form.       

     Hereinafter, technical concepts and effects thereof that are understood from the above-described exemplary embodiments and modified examples will be described. 
     (A) A recording system includes a recording device including a recording unit configured to perform recording onto a medium, a transporting belt including an adhesive layer and configured to transport the medium stuck on the adhesive layer, a drive unit configured to drive the transporting belt, a control unit that includes a detection unit configured to detect a load current flowing in the drive unit, and that controls the drive unit. The recording system further includes a peeling device configured to peel the medium from the transporting belt, and a notification device configured to provide a notification, where the control unit causes the notification device to provide a notification on a time to replace the adhesive layer, based on a detection result of the detection unit. 
     When the medium is peeled from the transporting belt by the peeling device, a load is generated on the drive unit. The load generated on the drive unit appears as a load current flowing in the drive unit. The load generated on the drive unit increases as an adhesive force of the adhesive layer increases. Thus, the load current increases as the adhesive force of the adhesive layer increases. In other words, when the adhesive force of the adhesive layer decreases, the load current decreases. 
     According to the configuration described above, the control unit can detect the adhesive force of the adhesive layer by detecting the load current flowing in the drive unit. In other words, the control unit can detect the adhesive force without affecting the adhesive layer. Therefore, the recording system can detect the adhesive force without decreasing the adhesive force of the adhesive layer. 
     (B) In the recording system described above, the notification device may include a display unit configured to display information, and an input unit configured to receive an input of an instruction, and the control unit, when completion of replacement of the adhesive layer is input to the input unit, may detect the load current flowing in the drive unit in a case in which the medium is peeled from the transporting belt by the peeling device, in a state where an operation of the recording unit is stopped. 
     According to this configuration, when the adhesive layer is replaced, the control unit detects the adhesive force of the replaced new adhesive layer. In other words, the control unit detects an initial value of the adhesive force of the new adhesive layer. As a result, the control unit can detect a degree of decrease in the adhesive force with reference to the initial value of the adhesive force. 
     (C) In the recording system described above, the notification device may include a display unit configured to display information, and an input unit configured to receive an input of an instruction, the control unit may cause the notification device to provide a notification for prompting replacement of the adhesive layer when the load current is equal to or less than a set value, and the set value may be changeable through the input unit. 
     According to this configuration, timing for prompting replacement of the adhesive layer is changed by changing the set value. As a result, usability of a user improves. 
     (D) The recording system described above may include a holding device configured to hold a roll body on which the medium is wound, and a tension adjustment device configured to adjust a tension of the medium between the holding device and the recording device to be constant, where the medium may be unwound from the roll body, which is held by the holding device, by driving the transporting belt. 
     The medium is unwound from the roll body by driving the drive unit. As a result, a load is generated on the drive unit by unwinding the medium from the roll body. At this time, due to the moment of inertia, it is more difficult to rotate the roll body with a greater weight of the roll body. In other words, a load generated on the drive unit is more likely to increase with a greater remaining amount of the medium. 
     In this regard, according to the configuration described above, by the tension adjustment unit adjusting a tension of the medium to be constant, a load generated on the drive unit is constant by the medium being unwound from the roll body regardless of the remaining amount of the medium. As a result, the control unit can accurately detect the adhesive force, based on a load current. 
     (E) A recording device is a recording device in which a medium is collected by a peeling device, and includes a recording unit configured to perform recording onto the medium, a transporting belt including an adhesive layer and configured to transport the medium stuck on the adhesive layer, a drive unit configured to drive the transporting belt, a control unit including a detection unit configured to detect a load current flowing in the drive unit, and configured to control the drive unit, and a notification unit configured to provide a notification, where the control unit causes the notification unit to provide a notification on a time to replace the adhesive layer, based on the load current flowing in the drive unit when the medium is peeled from the transporting belt. 
     According to the configuration described above, an effect similar to that of the recording system described above is acquired. 
     (F) A control method is a control method for a recording device including a recording unit configured to perform recording on a medium, a transporting belt including an adhesive layer and configured to transport the medium stuck on the adhesive layer, and a drive unit configured to drive the transporting belt, and includes detecting a load current flowing in the drive unit when the medium is peeled from the transporting belt, and providing a notification on a time to replace the adhesive layer, based on a value of the detected load current. 
     According to this method, an effect similar to that of the recording system and the recording device described above is acquired.