JP2010231856A - Media processor and media processing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To specify the center of a recording medium without loading it on the printer tray. <P>SOLUTION: The label printer includes a carriage 13 to print on the label surface of a recording medium by moving back and forth in the main scanning direction, a printer tray 33 freely movable in the sub-scanning direction with the recording medium mounted thereon and having center marks 38, 39 showing the center of the recording medium, a sensor 27 provided on the carriage to find the center marks, and a tray position controller to specify the center based on the position of the center marks found by the sensor. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a media processing device that reads / writes data from / to a disc-shaped recording medium such as a CD or a DVD and prints on a label surface of the recording medium, and controls the media processing device and its operation The present invention relates to a media processing system that includes a host computer that performs the processing.

  A media storage unit for storing recording media such as CDs and DVDs, a media drive for writing data to the recording media, and reading data from the recording media, and a label surface of the recording media on which the data is written Media processing including a label printer for printing a title representing the contents of the data or an image designated by the user, a media transport mechanism for transporting a recording medium, and a control unit for controlling the operation of each unit An apparatus is known (see Patent Document 1).

  The label printer included in the media processing device described in Patent Document 1 is desired by reciprocally moving the printer head on the label surface of the recording medium while ejecting ink while the tray on which the recording medium is placed is slid. Can be printed on the label.

JP 2006-331534 A

  However, when the usage environment changes greatly or the cumulative usage time becomes longer, the label printer can be caused by, for example, a dimensional error caused by deterioration of the drive mechanism that slide-drives the tray or a change in the usage environment. When the center position of the recording medium placed on the label is shifted from a preset reference position, an image may be printed at a position shifted from the print position on the label surface. For the same reason, an image that is slightly shrunk in the tray sliding direction may be printed.

  In such a case, conventionally, a method such as correcting an image based on a recording medium (fail media) on which the image is printed with a shift or shrinkage from the printing position has been used. However, in such a method, for example, every time a label printer is used in a state in which the use environment is different from the previous use, at least one piece of fail media is generated.

  One aspect of the present invention is a media processing apparatus that can solve the above-described problems, a media storage unit that stores a plurality of recording media, a media drive that writes data to the recording media, and the recording A label printer that performs printing on a label surface of media, the media storage unit, the media drive, and a media transport unit that transports the recording medium to the label printer, the media drive, the label printer, and the media transport unit A control unit that controls the operation of the recording medium, and the label printer includes a carriage that performs printing on a label surface of the recording medium by reciprocating movement in the main scanning direction, and a sub scanning direction in a state where the recording medium is mounted. Center of the recording medium that is movably provided and placed A printer tray on which a center position display mark indicating the position is formed, a detection unit provided on the carriage for detecting the center position display mark, and the detection position of the center position display mark by the detection unit It has a tray position control part which specifies a center position.

  According to such a media processing device, the label printer can specify the center position of the recording medium without placing the recording medium on the printer tray. Therefore, a failure medium is not generated to specify the center position of the recording medium, and the loss of the recording medium can be reduced.

  In the one form, the center position display mark includes a center position detection edge formed along a straight line passing through the center position, and the detection unit detects the center position detection edge. The tray position control unit preferably specifies the center position based on a detection position of the center position detection edge by the detection unit.

  Thereby, the label printer can specify the center position of the recording medium more accurately and easily.

  In the first aspect, the tray position control unit calculates a movement distance of the printer tray until the detection unit detects the center position detection edge from a reference position, and the calculated movement distance is calculated in advance. It is preferable that the moving distance of the printer tray is corrected based on a difference from a predetermined reference value.

  As a result, even when a dimensional error occurs in the drive mechanism due to deterioration of the tray drive mechanism over time or a change in usage environment, the expansion / contraction of the print image accompanying the dimensional error is detected before printing on the recording medium is started. be able to.

  In the first aspect, it is preferable that the center position display mark is formed on the printer tray on the opposite side in the sub-scanning direction across the center position.

  As a result, regardless of whether the printer tray is in the storage position stored in the label printer or the exchange position where the recording medium can be delivered, the center position of the recording medium and the expansion / contraction of the print image accompanying the expansion / contraction Can be easily detected.

  Another embodiment of the present invention is a media processing system that can solve the above-described problems, and includes a media processing device having any one of the above configurations and a host computer that controls the operation of the media processing device. It is characterized by that.

  With this configuration, the media processing system according to the present invention achieves the same effects as the media processing device according to the above aspect. In the present embodiment, for example, a single host computer controls a plurality of media processing devices. In the label printer of each media processing apparatus, the center position of the recording medium and the expansion / contraction of the print image accompanying the expansion / contraction can be easily detected without placing the recording medium on the printer tray.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

1 is a block diagram showing a schematic configuration of a media processing system 500 according to an embodiment of the present invention. 2 is a perspective view showing an internal structure of the media processing apparatus 100. FIG. 2 is a perspective view illustrating an appearance of a label printer 110. FIG. It is a perspective view which shows an internal structure when the external housing of the label printer 110 is removed. 3 is a block diagram of a printer control unit 50 that performs various controls of the label printer 110. FIG. 3 is a schematic top view showing an arrangement of a printer tray 33 and a pinion gear 37 on which a recording medium M is placed. FIG. FIG. 6 is a schematic diagram showing a state of a center position specifying operation and a movement distance correcting operation by the PW sensor 27 when the printer tray 33 is at the storage position. FIG. 6 is a schematic diagram showing a state of a center position specifying operation and a movement distance correcting operation by a PW sensor 27 when the printer tray 33 is at an exchange position. 6 is a flowchart illustrating an example of an operation flow of a center position specifying operation and a movement distance correcting operation by the label printer 110.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. However, the following embodiments do not limit the invention according to the scope of the claims, and the features described in the embodiments will be described below. Not all combinations are essential for the solution of the invention.

  FIG. 1 is a block diagram showing a schematic configuration of a media processing system 500 according to an embodiment of the present invention. FIG. 2 is a perspective view showing the internal structure of the media processing apparatus 100. A media processing system 500 according to this embodiment reads and writes data from and to a disc-shaped recording medium M such as a CD or a DVD, and prints on the label surface of the recording medium M. A host computer 200 that controls the operation of the media processing apparatus 100.

  As shown in FIGS. 1 and 2, the media processing apparatus 100 includes first to fourth media storage units 121, 122, 123, and 124, two media drives 141 and 142, a label printer 110, and the like. A media transport unit 130, a media identification unit 150, a transport control unit 160, and an operation unit 170.

  In FIG. 2, the case of a substantially rectangular parallelepiped shape that is an exterior of the media processing apparatus 100 is omitted and the device arrangement inside is shown, but the case is attached in an actual use state. In addition, an opening / closing door used when inserting / removing the recording medium M is attached to the front side of the case, and an operation unit 170 on which display lamps and operation buttons are arranged is arranged on the upper side of the case. Is provided.

  The first media storage unit 121 and the second media storage unit 122 provided immediately below the first media storage unit 121 can be attached to and detached from the frame of the media processing apparatus 100, and each includes a plurality of recording media. M can be stored. 1 and 2 show a state in which a plurality of recording media M are accommodated in each of the first media storage unit 121 and the second media storage unit 122. FIG.

  The third media storage unit 123 is a recess formed in a drawer tray 125 slidably attached to the front of the media processing apparatus 100 and is used for storing a small number of recording media M. The fourth media storage unit 124 is detachably fixed to the third media storage unit 123, and can store a larger number of recording media M than the third media storage unit 123.

  When data writing and label printing are performed on the recording medium M using the media processing apparatus 100, the first media storage unit 121 is used as a supply source stacker that stores the recording medium M. The second media storage unit 122 and the fourth media storage unit 124 are used as a discharge destination stacker for storing the recording media M for which data writing processing and label printing have been completed.

  Alternatively, the first media storage unit 121 can be used as a discharge destination stacker, or the second media storage unit 122 and the fourth media storage unit 124 can be used as a supply source stacker. The third media storage unit 123 is provided to serve as an alternative output destination stacker when the fourth media storage unit 124 used as the output destination stacker is removed. By providing the third medium storage unit 123 in this way, even if the fourth medium storage unit 124 cannot accommodate the recording medium M during the data writing process and label printing on the recording medium, the data can be stored. The fourth medium storage unit 124 can be removed and the internal recording medium M can be collected while continuing the writing process and label printing.

  Each of the two media drives 141 and 142 has drive trays 143 and 144 that are slidably openable and closable. Each of the media drives 141 and 142 performs one or both of a reading process of reading data written on the recording medium M placed on the drive trays 143 and 144 and a writing process of writing predetermined data. Can do.

  The label printer 110 has an ink jet recording apparatus that can print on the label surface of the recording medium M. The label printer 110 can print an image (label image) designated by the user in advance on a label surface of a recording medium M placed on a printer tray 33 described later. The detailed configuration of the label printer 110 will be described later.

  The media transport unit 130 includes a vertical guide shaft 131 provided substantially vertically and a transport arm 132 that can be moved up and down and swiveled along the vertical guide shaft 131. In addition, a gripping claw for gripping the recording medium M is provided at the center of the front end of the transport arm 132.

  The transfer arm 132 is capable of rotating in the direction indicated by arrows A to H in FIG. 1 and elevating in the direction indicated by arrows I and J. The transfer arm 132 can be moved to each transfer position indicated by [1] to [6] in the drawing by a combination of these operations. As a result, the transport arm 132 includes the media storage units 121, 122, 123, and 124 (either the third media storage unit 123 or the fourth media storage unit 124), the media delivery position of the media drive 141, The recording medium M can be transported between the media delivery position of the media drive 142 and the media delivery position of the label printer 110.

  In addition, if each conveyance position shown with numerals [1] to [6] in FIG. 1 is supplementarily explained, [1] is the position (standby position) of the home position (HP) of the conveyance arm 132; 2] is the position of the first media storage unit 121, [3] is an arbitrary position between the HP and the position of the first media storage unit 121, and [4] is the media delivery of the label printer 110. [5] is the position of the second media storage unit 122, and [6] is an arbitrary position between the media delivery position of the label printer 110 and the position of the second media storage unit 122. .

  The transport control unit 160 performs drive control of the media transport unit 130. This transport control unit 160 is based on information (drive control information) related to drive control of the media transport unit 130 input by the user in the operation unit 170 or the drive control information from the host computer 200. Control the behavior. For example, based on the drive control information, the transport control unit 160 transfers the recording medium M in the first media storage unit 121 to the media storage units 122 and 124, the media delivery position of the label printer 110, and the media drive 141. , 142 is output to the media transport unit 130 as an instruction command indicating whether it should be transported to one of the media delivery positions.

  The operation unit 170 receives control information regarding various operations of the media processing device 100 input by the user, and sends the control information to the media drives 141 and 142, the label printer 110, and the transport control unit 160. Note that the media processing apparatus 100 of this embodiment may not include the operation unit 170. In this case, the operations of the media drives 141 and 142, the label printer 110, and the media transport unit 130 of the media processing apparatus 100 are controlled based on various control information from the host computer 200.

  FIG. 3 is a perspective view showing an appearance of the label printer 110. FIG. 4 is a perspective view showing the internal structure of the label printer 110 when the external housing is removed. FIG. 5 is a block diagram of the printer control unit 50 that performs various controls of the label printer 110. FIG. 6 is a schematic top view showing the arrangement of the drive tray 33 and the pinion gear 37 on which the recording medium M is placed.

  As shown in FIG. 3, the label printer 110 includes a housing 3 that covers the side surface, top surface, and rear surface of the label printer 110, a front cover 8 that is provided on the front surface of the label printer 110, and an open / close provided on the front surface that can be opened and closed. And a door 9. Further, an ink cartridge unit 15 is provided above the front cover 8, and a plurality of ink cartridges 16 are detachably provided side by side in the width direction of the label printer 110.

  As shown in FIG. 4, the label printer 110 includes a lower chassis 4, a main frame 5 extending in the width direction (main scanning direction) of the label printer 110, and the depth of the label printer 110 on both sides of the main frame 5. A side frame 6 and a side frame 7 provided in parallel to the direction (sub-scanning direction) are arranged. A main carriage guide shaft 11 and a sub carriage guide shaft 12 extending in the main scanning direction are arranged between the side frame 6 and the side frame 7 with a predetermined interval in the sub scanning direction. Both ends of the main carriage guide shaft 11 and the sub carriage guide shaft 12 are fixed to the side frame 6 and the side frame 7.

  A carriage 13 is arranged inside the label printer 110. The rear portion of the carriage 13 is inserted through the main carriage guide shaft 11, and the front portion of the carriage 13 is supported by the sub carriage guide shaft 12 from below. The carriage 13 is guided by these carriage guide shafts and can reciprocate in the main scanning direction by a driving force from a CR motor 63 described later.

  A recording head 14 having a plurality of ink ejection openings is provided below the carriage 13 so as to face the platen 20. The recording head 14 is supplied from each of the plurality of ink cartridges 16 to the carriage 13 via an ink supply tube in a later-described printing operation on the label surface of the recording medium M placed on the printer tray 33. Ink is discharged onto the label surface.

  The printer tray 33 is provided so as to be movable in the sub-scanning direction with the recording medium M placed thereon. In the present embodiment, the printer tray 33 is an exchange position where the recording medium M can be transferred between the storage position stored in the label printer 110 (indicated by a solid line in FIG. 4) and the media transport unit 130. It is possible to slide between the positions indicated by the phantom lines in FIG.

  As shown in FIGS. 4 and 6, a rack 34 that meshes with the pinion gear 37 is formed on one side surface of the printer tray 33 along the sub-scanning direction. The pinion gear 37 is rotated by a driving force from a PF motor 64 described later. Therefore, the printer tray 33 can move in the sub-scanning direction while maintaining a substantially horizontal posture by rotating the pinion gear 37 that meshes with the rack 34 under the driving force from the PF motor 64.

  The printer control unit 50 receives information related to the printing operation of the label printer 110 transmitted from the host computer 200 or input from the operation unit 170 by the user, and sends information related to the printing results and various print settings by the label printer 110 to the host computer. 200 is transmitted to the operation unit 170.

  As shown in FIG. 5, the printer control unit 50 includes an interface (IF) 51, an ASIC 52, a RAM 53, a PROM 54, an EEPROM 55, a CPU 56, a timer IC 57, a DC unit 58, a PF motor driver 61, a CR motor driver 60, and a head driver 59. Have.

  The interface (IF) 51 transmits / receives data to / from the host computer 200. The CPU 56 performs arithmetic processing for executing the control program of the label printer 110 and other necessary arithmetic processing, and the timer IC 57 causes the CPU 56 to generate periodic interrupt signals necessary for various processing.

  The ASIC 52 controls the print resolution, the drive waveform of the recording head 14, and the like based on print data included in information transmitted from the host computer 200 via the IF 51. The RAM 53 is used as a work area for the ASIC 52 and the CPU 56 and a primary storage area for other data. The PROM 54 and the EEPROM 55 store a control program (firmware) necessary for controlling the label printer 110 and data necessary for processing.

  The DC unit 58 is an example of the tray position control unit of the present invention, and controls the driving speeds of the CR motor 63 and the PF motor 64. The DC unit 58 includes, for example, a PID control unit, an acceleration control unit, and a PWM control circuit. The DC unit 58 performs various calculations based on control commands sent from the CPU 56 and output signals from the rotary encoder 68, the linear encoder 69, the PW sensor 27, etc., and the driving speed of the CR motor 63 and the PF motor 64. Is sent to the CR motor driver 60 and the PF motor driver 61.

  The PF motor driver 61 drives and controls the PF motor 64 based on a control signal from the DC unit 58. The PF motor 64 rotates the pinion gear 37 that meshes with the rack 34 formed on the side surface of the printer tray 33 by generating a driving force according to the drive control by the PF motor driver 61, thereby causing the printer tray 33 to move. Move in the sub-scanning direction.

  The CR motor driver 60 drives and controls the CR motor 63 based on a control signal from the DC unit 58. The CR motor 63 reciprocates the carriage 13 in the main scanning direction by generating a driving force according to the driving control by the CR motor driver 60. The head driver 59 drives and controls the recording head 14 based on print data included in information transmitted from the host computer 200 based on a control signal from the CPU 56.

  The CPU 56 and the DC unit 58 are supplied with an output signal from a rotary encoder 68 that detects the rotation amount, rotation direction, and rotation speed of the PF motor 64 and a linear encoder 69 that detects an absolute position of the carriage 13 in the main scanning direction. An output signal and an output signal from the PW sensor 27 are given.

  The PW sensor 27 is an example of a detection unit in the present invention, and is provided at the bottom of the carriage 13. The PW sensor 27 may be, for example, an optical sensor including a light emitting unit that emits light toward the printer tray 33 and a light receiving unit that receives reflected light from the printer tray 33. The PW sensor 27 is used for detecting the presence or absence of the recording medium M on the printer tray 33, for example. Further, the PW sensor 27 is used to detect center position display marks 38 and 39 for specifying the center position of the media loading portion 32 in the printer tray 33 as described later.

  The rotary encoder 68 includes a disk-shaped scale 68b attached to a drive shaft 65 that is rotationally driven by the PF motor 64, a plurality of light-transmitting portions 68c provided along the outer periphery of the disk-shaped scale 68b, and a light-transmitting portion 68c. And a detection unit 68a configured by a light receiving unit that receives light that has passed through the light transmitting unit 68c.

  When the scale 68b rotates, the detection unit 68a outputs a rising signal and a falling signal formed by light passing through the light transmitting unit 68c to the printer control unit 50. The printer control unit 50 can calculate the moving distance of the printer tray 33 by detecting the rotation amount, rotation speed, and rotation direction of the PF motor 64 based on the signal from the detection unit 68a.

  The pulley 71 is attached to a driven shaft 70 connected to a power transmission mechanism (not shown) that rotationally drives the pinion gear 37. An endless belt 67 is wound around the pulley 71 and the drive shaft 65, and the pulley 71 is rotationally driven by the PF motor 64 via the endless belt 67. The rotational driving force from the PF motor 64 is transmitted to the pinion gear 37 via the driven shaft 70 and the power transmission mechanism.

  The linear encoder 69 includes a code plate that is long in the main scanning direction, a light emitting unit that emits light to a plurality of light transmitting units formed on the code plate, and a light receiving unit that receives light that has passed through the light transmitting unit. Have. The linear encoder 69 outputs, to the printer control unit 50, a rising signal and a falling signal that are formed by light that passes through the translucent part of the light from the light emitting part. The printer control unit 50 can detect the absolute position of the carriage 13 in the main scanning direction based on a signal from the linear encoder 69.

  As shown in FIG. 6, a media placement portion 32 that is recessed in a concave shape is formed on the upper surface of the printer tray 33, and the recording medium M is placed on the media placement portion 32. Further, two substantially rectangular center position display marks 38 and 39 are formed on the upper surface of the printer tray 33.

  In the center position display mark 38, a center position detection edge E2 is formed along a straight line that passes through the center position of the media loading portion 32 of the printer tray 33 and is parallel to the main scanning direction. The center position display mark 39 has a center position detection edge E4 formed along the straight line. In the present embodiment, the center position of the media placement section 32 and the center position of the recording medium M placed on the media placement section 32 are the same position.

  The center position display mark 39 is formed on the opposite side in the sub-scanning direction with respect to the center position display mark 38 with the center position of the media placement portion 32 interposed therebetween.

  The label printer 110 of the media processing system 500 according to the present embodiment is, for example, immediately after starting the media processing system 500 or before performing label printing again after label printing by the label printer 110 has not been performed for a predetermined time or more. By detecting the center position display marks 38 and 39 formed on the printer tray 33 by the PW sensor 27, the center position specifying operation for specifying the center position of the media loading unit 32 and the movement distance of the printer tray 33 are calculated. The movement distance correction operation to be corrected is executed. These operations can be executed regardless of whether or not the recording medium M is placed on the media placement unit 32 of the printer tray 33.

  Hereinafter, specific examples of the center position specifying operation and the movement distance correcting operation by the label printer 110 will be described with reference to FIGS. FIG. 7 is a schematic diagram showing the state of the center position specifying operation and the movement distance correcting operation by the PW sensor 27 when the printer tray 33 is in the storage position. FIG. 8 is a schematic diagram showing the state of the center position specifying operation and the movement distance correcting operation by the PW sensor 27 when the printer tray 33 is at the replacement position. FIG. 9 is a flowchart illustrating an example of an operation flow of the center position specifying operation and the movement distance correcting operation by the label printer 110.

  When performing the center position specifying operation and the movement distance correcting operation, the label printer 110 first detects whether or not the printer tray 33 is in the storage position (step S110). When the printer tray 33 is in the storage position as shown in FIG. 7A (step S110: YES), the carriage is moved until the PW sensor 27 overlaps the first mark detection position P1 as shown in FIG. 7B. 13 moves (step S140). In this example, as shown in FIG. 7B, the first mark detection position P1 passes through the center position display mark 38 formed on the carriage 13 side with respect to the center position of the media placement portion 32, and is sub-scanned. Any position in a straight line parallel to the direction.

  Then, the center position detection edge E2 of the center position display mark 38 is detected by the PW sensor 27 while the printer tray 33 moves from the storage position to the replacement position side (step S150). Then, the DC unit 58 stores in the PROM 54 and the EEPROM 55 as the center position of the media mounting portion 32 in the sub-scanning direction from the moving distance of the PW sensor 27 and the printer tray 33 (step S160).

  Further, the DC unit 58 calculates the distance (the distance between the edges of the center position display mark 38) that the printer tray 33 has moved until the PW sensor 27 detects the center position detection edge E2. Here, the PROM 54 and the EEPROM 55 of the printer control unit 50 store, for example, the initial setting value of the distance between edges of the center position display mark 38 or the distance between edges corrected in the immediately preceding movement distance correction operation as a reference value. Then, the DC unit 58 calculates the difference between the calculated moving distance and the reference value of the distance between the edges of the center position display mark 38.

  Then, the DC unit 58 corrects the moving distance of the printer tray 33 based on the calculated difference (step S170). For example, the DC unit 58 has a dimensional error in the drive mechanism as the drive mechanism (pinion gear 37, endless belt 67, etc.) of the printer tray 33 deteriorates with time or changes in the use environment compared to the previous movement distance correction operation. If the distance between edges (reference value) of the center position display mark 38 corrected during the previous movement distance correction operation differs from the calculated movement distance, the The rotation amount and rotation speed of the PF motor 64 during the printing operation are corrected.

  On the other hand, if the printer tray 33 is not in the storage position in step S110 (step S110: NO), the label printer 110 further detects whether or not the printer tray 33 is in the replacement position (step S120). When the printer tray 33 is at the replacement position as shown in FIG. 8A (step S120: YES), the carriage is moved until the PW sensor 27 overlaps the second mark detection position P2 as shown in FIG. 8B. 13 moves (step S180). In this example, as shown in FIG. 8B, the second mark detection position P2 passes through the center position display mark 39 formed on the carriage 13 side with respect to the center position of the media placement portion 32, and is sub-scanned. Any position in a straight line parallel to the direction.

  The center position detection edge E4 of the center position display mark 39 is detected by the PW sensor 27 while the printer tray 33 moves from the replacement position to the storage position side (step S190). Subsequent operations are the same as those in step S160 and step S170, and a description thereof will be omitted. In step S120, when the printer tray 33 is not in the replacement position (step S110: NO), the printer tray 33 is moved from the current position to the storage position side (storage direction) as an initialization operation, and then in step S110. Return to.

  Although the center position can be specified and the movement distance can be corrected by the above operation flow, the following simple operation flow is also possible. That is, the center position may be specified and the movement distance may be corrected by detecting the mark after moving the printer tray and the carriage.

  As described above, the label printer 110 of the media processing system 500 according to the present embodiment has the center of the recording medium M regardless of whether or not the recording medium M is placed on the media placement unit 32 of the printer tray 33. The position can be specified. Even if a dimensional error occurs in the drive mechanism due to deterioration of the tray drive mechanism over time or a change in use environment, an error occurs between the movement distance of the printer tray 33 and the movement distance calculated by the DC unit 58. Thus, it is possible to prevent the printing operation from being performed. In addition, by providing two center position display marks 38 and 39 on the opposite side in the sub-scanning direction across the center position of the media placement section 32, the printer tray can be used at the start of the center position specifying operation and the movement distance correcting operation. Even when 33 is in the storage position or the exchange position, the center position specifying operation and the movement distance correcting operation can be completed in a shorter time.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 3 ... Housing, 4 ... Lower chassis, 5 ... Main frame, 6 ... Side frame, 7 ... Side frame, 8 ... Front cover, 9 ... Opening / closing door, 11 ... Main carriage guide shaft, 12 ... Sub carriage guide shaft, 13 ... Carriage, 14 ... recording head, 15 ... ink cartridge unit, 16 ... ink cartridge, 20 ... platen, 27 ... PW sensor, 32 ... media placement section, 33 ... printer tray, 34 ... rack, 37 ... pinion gear, 38, 39 ... Center position display mark, 50 ... Printer control unit, 51 ... IF, 52 ... ASIC, 53 ... RAM, 54 ... PROM, 55 ... EEPROM, 56 ... CPU, 57 ... Timer IC, 58 ... DC unit, 59 ... Head Driver 60 ... CR motor driver 61 ... PF motor driver 63 ... CR motor , 64 ... PF motor, 65 ... drive shaft, 67 ... endless belt, 68 ... rotary encoder, 69 ... linear encoder, 70 ... driven shaft, 71 ... pulley, 100 ... media processing device, 110 ... label printer, 121, 122, 123, 124 ... Media storage unit, 125 ... Drawer tray, 130 ... Media transport unit, 131 ... Vertical guide shaft, 132 ... Transfer arm, 141,142 ... Media drive, 143,144 ... Drive tray, 160 ... Transport control unit, 170 ... operation unit, 200 ... host computer, 500 ... media processing system, M ... recording medium

Claims (5)

A media storage unit that stores a plurality of recording media, a label printer that performs printing on a label surface of the recording media, the media storage unit, a media transport unit that transports the recording media to the label printer, and the label printer And a control unit that controls the operation of the media transport unit, and a media processing device comprising:
The label printer is
A carriage for printing on the label surface of the recording medium by reciprocating movement in the main scanning direction;
A printer tray provided with a center position display mark indicating a center position of the recording medium, which is provided so as to be movable in a sub-scanning direction orthogonal to the main scanning direction in a state where the recording medium is mounted;
A detection unit provided on the carriage for detecting the center position display mark; and
A tray position control unit that identifies the center position based on the detection position of the center position display mark by the detection unit;
A media processing apparatus comprising: The center position display mark includes a center position detection edge formed along a straight line passing through the center position,
The detection unit detects the center position detection edge,
The media processing apparatus according to claim 1, wherein the tray position control unit specifies the center position based on a detection position of the center position detection edge by the detection unit.   The tray position control unit calculates a movement distance between the carriage and the printer tray until the detection unit detects the center position detection edge, and a difference between the calculated movement distance and a predetermined reference value The media processing apparatus according to claim 2, wherein the movement distance of the printer tray is corrected based on the information.   4. The media processing apparatus according to claim 3, wherein the center position display mark is formed on the printer tray on the opposite side in the sub-scanning direction across the center position. A media processing device according to any one of claims 1 to 4,
And a host computer for controlling the operation of the media processing device.

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