JP2011219194A - Feeding control device, feeding control method, and recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeding control device in which continuous feeding can be performed holding appropriate interval, and to provide a feeding control method, and a recording device.SOLUTION: A printer 11 includes a feeding control device controlling a feeding part 21 feeding paper P to a transportation route 24 connected to an inversion route 67. The feeding control device includes: a PE sensor 38 detecting the paper P at a detection position Dp arranged on the transportation route 24; a calculating part calculating length of precedence paper P1 based on the detected result of the PE sensor 38 in which both ends in the feeding direction of the fed precedence paper P1 are detected; a decision part deciding adjustment transportation quantity deciding feeding timing based on length of the precedence paper P1; and a feeding control part performing feeding indication of subsequent paper P2 when transportation quantity of the paper P exceeds adjustment transportation quantity after the PE sensor 38 detects the precedence paper P1 being in an inversion process as feeding timing.

Description

  The present invention relates to a feeding control device, a feeding control method, and a recording apparatus.

  2. Description of the Related Art Conventionally, in a recording apparatus that performs recording (printing) on a target sheet, the succeeding sheet is fed toward the recording position at the timing at which the printed preceding sheet is discharged (conveyed) to a predetermined position ( (For example, Patent Document 1).

  In the recording apparatus disclosed in Patent Document 1, when printing is continuously performed on a plurality of sheets, the processing efficiency is improved by executing the discharge of the preceding sheet and the feeding of the succeeding sheet at the same time. It was like that.

JP 2008-44313 A

  By the way, in duplex printing in which printing is performed on both sides of a sheet, after printing on the front side, the sheet is fed from the recording position to the reversing path, and the reversed sheet is conveyed again to the recording position to perform printing on the back side. . For this reason, conventionally, in order to avoid the interference between the preceding sheet and the succeeding sheet in the transport path, the feeding of the succeeding sheet is started after the discharging of the preceding sheet is completed.

  However, in order to improve processing efficiency, even in double-sided printing, while maintaining an appropriate interval to avoid interference between the preceding sheet and the succeeding sheet, the conveyance of the succeeding sheet and the feeding of the succeeding sheet are continuously performed while maintaining an appropriate interval. It was desired to do paper. Such a problem is not limited to the case of performing double-sided printing, but is common to, for example, the case of performing face-down paper discharge in which paper is discharged through a reverse path so that the printing surface of the paper faces downward. It is.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a feeding control device, a feeding control method, and a recording that can perform continuous feeding while maintaining an appropriate interval. To provide an apparatus.

  In order to achieve the above object, a feeding control device according to the present invention is a feeding control device that controls feeding means for feeding a target to a conveying path connected to a reversing path, and is provided on the conveying path. Based on the detection results of the target detection means for detecting the target at the detection position and the target detection means for detecting both ends in the feeding direction of the preceding target to be fed, the length of the preceding target is determined. A calculating means for calculating; a determining means for determining an adjustment conveyance amount for determining a feeding timing based on a length of the preceding target; and the preceding target in which the target detecting means is in a reversing process as the feeding timing. A feed instructing unit for instructing feeding of the subsequent target when the transport amount of the target exceeds the adjusted transport amount after the detection. .

  According to the above configuration, the feeding timing for instructing the feeding of the subsequent target is determined based on the adjusted conveyance amount after the target detecting unit detects the preceding target in the inversion process. In other words, the feeding timing is determined based on the conveyance status of the preceding target in the reversal process and the length of the preceding target to be fed in the feeding direction, so that an appropriate interval that does not interfere with the preceding target is maintained. However, continuous feeding of subsequent targets can be performed.

  The feeding control device of the present invention further includes a determination unit that determines whether or not the length of the preceding target is equal to or longer than a set length, and the feeding instruction unit includes the preceding target that is equal to or longer than the set length. In this case, when the transport amount after the target detection unit detects the preceding target after reversal exceeds the adjusted transport amount, the feeding instruction is given, and the preceding target is less than the set length. Performs the feeding instruction when the transport amount after the target detection means detects the preceding target before inversion exceeds the adjusted transport amount.

  According to the above configuration, when the preceding target is equal to or longer than the set length, the detection target of the target detection unit is the preceding target after inversion. Therefore, the adjustment transport amount is larger than when the detection target is the preceding target before inversion. Can be shortened. Thereby, the conveyance error after detecting a preceding target can be made small. Further, when the preceding target is less than the set length, the feeding instruction means sets the detection target of the target detecting means as the preceding target before inversion, and therefore starts feeding the subsequent target in the inversion process of the preceding target. Can do.

  In the feeding control device of the present invention, the feeding instruction means gives the feeding instruction when a rear end of the preceding target reaches a trigger position in the inversion path, and the set length is in the inversion process. When the rear end of the preceding target reaches the trigger position, the value is set to a value capable of determining whether or not the front end of the preceding target after being inverted is a length that can be detected by the target detecting means.

  According to the above configuration, when the trailing end of the preceding target in the reversing process reaches the trigger position, it is determined whether or not the leading end after the reversing of the preceding target can be detected by the target detection unit according to the set length. Can do.

  The feeding control device of the present invention is a feeding path length detecting means for detecting the length of the feeding path of the target that changes in accordance with the amount of lamination of the target held in a laminated state in preparation for feeding, And a correction unit that corrects the adjustment conveyance amount based on a detection result of the feeding path length detection unit.

  According to the above configuration, the correction unit corrects the adjustment conveyance amount based on the detection result of the feeding path length detection unit. Therefore, even when the length of the feeding path changes due to increase / decrease of the target stacking amount, Subsequent targets can be fed at an appropriate timing.

  In order to achieve the above object, a feeding control method of the present invention is a feeding control method for controlling a feeding means for feeding a target to a conveying path connected to a reversing path, and is arranged on the conveying path. Based on the detection results of detecting both ends in the feeding direction of the preceding target to be fed at the detection position to be calculated, based on the length of the preceding target, a calculation step for calculating the length of the preceding target, A determination step for determining an adjustment conveyance amount for determining a feeding timing; a detection step for detecting a preceding target in a reversing process at the detection position; and a detection step after detection at the detection position of the preceding target in a reversing process. In the determination step of determining whether or not the conveyance amount exceeds the adjusted conveyance amount, and the feeding timing at which the determination result of the determination step is affirmative determination, Comprising a feed direction step for the feed direction of the connection target, the.

  According to the above configuration, the feeding timing for instructing the feeding of the subsequent target is determined based on the adjusted conveyance amount after the preceding target in the reversal process is detected at the detection position. In other words, the feeding timing is determined based on the conveyance status of the preceding target in the reversal process and the length of the preceding target to be fed in the feeding direction, so that an appropriate interval that does not interfere with the preceding target is maintained. However, continuous feeding of subsequent targets can be performed.

  In order to achieve the above object, a recording apparatus of the present invention includes a feeding unit that feeds a target to a conveyance path connected to a reversing path, a conveyance unit that conveys the target along the conveyance path, and A recording unit configured to perform recording on the target in a conveyance path; a reversing unit configured to reverse the target on which the recording has been performed in the reversing path; and the feeding control device.

  According to the said structure, the effect similar to the said feeding control apparatus can be acquired.

1 is a cross-sectional view illustrating a schematic configuration of a printer according to a first embodiment. FIG. 3 is a block diagram illustrating a main part of an electrical configuration of the printer. 6 is a flowchart for explaining a print processing routine. 6 is a flowchart for explaining a print processing routine. Sectional drawing which shows the state which the front-end | tip of the preceding paper whose length is less than setting length reached the detection position in the inversion process. FIG. 6 is a cross-sectional view illustrating a state in which the rear end of the preceding sheet in FIG. 5 has reached a trigger position. Sectional drawing which shows the state which the front-end | tip of the preceding paper whose length is more than a setting length reached the detection position in the feeding process. FIG. 8 is a cross-sectional view showing a state in which the leading edge of the preceding paper in FIG. FIG. 9 is a cross-sectional view illustrating a state in which the trailing edge of the preceding sheet in FIG. 8 has reached a trigger position. FIG. 10 is a cross-sectional view illustrating a state where a trailing edge sheet is fed following the preceding sheet of FIG. 9. FIG. 10 is a cross-sectional view illustrating a schematic configuration and a state in which a preceding sheet having a length less than a set length is conveyed in a second embodiment. Sectional drawing which shows the state in which the preceding paper whose length is more than setting length is conveyed in the printer in 2nd Embodiment.

(First embodiment)
Hereinafter, a first embodiment embodying the present invention will be described with reference to FIGS. In the following description of the present specification, the terms “front-rear direction”, “left-right direction”, and “up-down direction” indicate the front-rear direction, left-right direction, and up-down direction indicated by arrows in each figure Shall.

  As shown in FIG. 1, a printer 11 as a recording device includes a recording unit 12 that performs recording on a sheet P (P1, P2) as a target, a transport device 13 that transports the sheet P, and a feeding control device. 14 (see FIG. 2).

  The recording unit 12 includes a recording head 15 as recording means for ejecting ink (fluid). A platen 16 as a support base is disposed below the recording head 15. Then, recording is performed by ejecting ink from the recording head 15 onto the paper P conveyed on the platen 16. In the following description, an area where the recording head 15 performs recording may be referred to as a recording position. In FIGS. 1 and 5 to 12, a dotted line written along the upper surface or the lower surface of the paper P indicates that the surface has been printed.

  The transport device 13 includes a transport unit 20 as a transport unit that transports the paper P, and a feeding unit 21 as a feed unit that feeds the paper P to the transport unit 20. The transport unit 20 includes a transport roller pair 22, a discharge roller pair 23, a transport path 24, a return path 25 connected to the transport path 24, a rotation roller 26, and a transport that can be driven to rotate in both forward and reverse directions. And a motor 27 (see FIG. 2).

  The return path 25 is a transport path through which the paper P passes only in the reversal process, and both ends thereof are connected to the transport path 24 at the merging positions G1 and G2. In addition, a portion of the transport path 24 on the left side of the merging position G1 is a substantially planar first path portion 24a, and a portion of the transport path 24 from the merging position G1 to the merging position G2 is approximately. The curved second path portion 24b is formed. The recording position where the recording head 15 performs recording is arranged on the first path portion 24a.

  The conveyance roller pair 22, the discharge roller pair 23, and the rotation roller 26 are connected to a conveyance motor 27 via a power transmission mechanism (not shown). The rotating roller 26 rotates the paper P in the counterclockwise direction in FIG. 1 when the transport motor 27 is driven in either the forward or reverse direction, so that the paper P is transported in the transport path 24 (mainly the second path portion). 24b) is fed (conveyed) in the feeding direction toward the recording position.

  The conveyance roller pair 22 and the discharge roller pair 23 rotate in the positive direction indicated by an arrow in FIG. 1 as the conveyance motor 27 rotates in the positive direction, thereby feeding the paper P in the feeding direction (left in FIG. 1). Direction). Further, the transport roller pair 22 and the discharge roller pair 23 rotate in the reverse direction as the transport motor 27 rotates in the reverse direction, so that the paper P passes through the first path portion 24a and is reverse to the feed direction. It is transported (returned) in the return direction (right direction in FIG. 1), and is transported toward the joining position G2 through the return path 25.

  The feeding unit 21 rotates the storage unit 30 that holds the unprocessed sheets P in a stacked state, the feeding roller 31 that feeds the sheet P from the storage unit 30, the feeding path 32, and the feeding roller 31. And a feeding motor 33 (see FIG. 2). The feeding path 32 is connected to the transport path 24 and the return path 25 at the joining position G2. When the feeding roller 31 is rotated in the counterclockwise direction in FIG. 1 as the feeding motor 33 is driven, the paper P placed on the uppermost side is fed out from the storage unit 30 to the feeding path 32. . As a result, the sheet P is fed through the feeding path 32 to the merging position G2 between the transport path 24 and the return path 25.

  In the printer 11, two or more sheets P exist on the transport path 24 so that a plurality of sheets P are continuously fed to the transport path 24 so as to be aligned along the feeding direction. Sometimes. In the present embodiment, when a plurality of sheets P are continuously fed to the transport path 24 in this way, the sheet P that has been fed first out of the two consecutive sheets P is referred to as the preceding sheet P1. The paper P fed after the preceding paper P1 may be referred to as the subsequent paper P2.

  The feed roller 31 is rotatably supported by an arm 36 that can rotate around a rotation shaft 35. The rotary shaft 35 is provided with a rotary encoder 37 (see FIG. 2) for detecting the amount of rotation of the rotary shaft 35. The arm 36 is biased by a biasing member (not shown) in a direction in which the paper P on which the feeding rollers 31 are stacked is pressed downward (clockwise in FIG. 1).

  The printer 11 also includes a PE sensor (paper end detection) as a target detection unit that detects an end of the paper P in the transport direction (feed direction or return direction) at the detection position Dp arranged on the transport path 24. A sensor 38 and a control device 50 (see FIG. 2) are provided. As shown in FIG. 2, the feed control device 14 is configured by the rotary encoder 37, the PE sensor 38, and the control device 50.

  The PE sensor 38 is an optical reflective sensor and includes a light source unit and a light receiving unit (not shown). The PE sensor 38 receives reflected light of light emitted downward from the light source unit by the light receiving unit, and outputs an electrical signal corresponding to the intensity of the reflected light received by the light receiving unit to the control device 50. That is, the output value of the PE sensor 38 becomes higher as the reflectance of the reflection object that reflects light from the light source unit is higher, or as the distance from the reflection object that is the reflection distance is shorter.

  In the present embodiment, the PE sensor 38 outputs an ON value that is larger than a predetermined threshold when the paper P is a reflection target, and is OFF that is less than the threshold when the paper P is not a reflection target. Output the value. Therefore, when the output value of the PE sensor 38 changes from the OFF value to the ON value, the leading edge of the paper P in the transport direction is detected, while the output value of the PE sensor 38 changes from the ON value to the OFF value. The trailing edge of the paper P in the transport direction is detected.

  The rotary encoder 37 provided on the rotation shaft 35 of the arm 36 that supports the feeding roller 31 outputs a detection signal corresponding to the amount of rotation of the rotation shaft 35 to the control device 50. The rotary shaft 35 rotates in the clockwise direction in FIG. 1 as the remaining amount of the paper P stacked in the storage unit 30 decreases in preparation for feeding. Since the length of the feeding path 32 changes according to the amount of stacked sheets P, the length of the feeding path 32 is detected based on the detection signal of the rotary encoder 37.

  As shown in FIG. 2, the control device 50 drives the computer 51, the head driver 52 for driving the recording head 15, the motor driver 53 for driving the feeding motor 33, and the transport motor 27. The motor driver 54 is provided. The computer 51 is constructed by a CPU (not shown), various memories (ROM, RAM, nonvolatile memory), ASIC (specific application IC), and the like, and is electrically connected to the head driver 52 and the motor drivers 53 and 54. Yes.

  The computer 51 includes a main control unit 55, a determination unit 56 as a determination unit, an acquisition unit 57, a determination unit 58 as a determination unit, and a correction unit as functional parts realized by at least one of hardware and software. A correction unit 59, a calculation unit 60 as a calculation unit, a print control unit 61, a feed control unit 62 as a feed instruction unit, a transport control unit 63, a forward rotation counter 64, and a reverse rotation counter 65.

  The main control unit 55 appropriately outputs control commands to the print control unit 61, the feed control unit 62, and the conveyance control unit 63. Specifically, when receiving a print command from a host computer or the like, the main control unit 55 outputs a control command for performing printing to the print control unit 61. Further, the main control unit 55 outputs a control command for starting the feeding of the paper P to the feeding control unit 62 prior to printing, and sends a control command for conveying the paper P to the transport control unit 63. Output.

  The calculation unit 60 calculates the length of the preceding sheet P1 in the feeding direction based on the detection result of the PE sensor 38 that detects both ends of the preceding sheet P1 to be fed in the feeding direction. The acquisition unit 57 acquires the length of the preceding paper P1 calculated by the calculation unit 60 and stores the acquisition result in the RAM.

  The determination unit 56 determines the adjustment conveyance amount that determines the feeding timing of the succeeding sheet P2 based on the length of the preceding sheet P1 when a plurality of prints based on one print job are performed. Further, the correction unit 59 corrects the adjusted conveyance amount based on the output signal of the rotary encoder 37. Further, the determination unit 58 determines whether or not the length of the preceding paper P1 is equal to or longer than a set length Ls described later.

  The print control unit 61 controls driving of the recording head 15 via the head driver 52 and causes ink droplets to be ejected from the recording head 15. The feed control unit 62 controls driving of the feed motor 33 via the motor driver 53, and the transport control unit 63 controls driving of the transport motor 27 via the motor driver 54. The output shaft of the transport motor 27 is provided with a rotary encoder 66 for detecting the rotation speed, rotation position, and rotation direction of the output shaft. The conveyance control unit 63 controls the driving of the conveyance motor 27 based on the detection signal from the rotary encoder 66.

  The forward counter 64 counts (counts) the transport amount of the paper P accompanying the rotation of the transport motor 27 in the forward direction, and the reverse counter 65 counts the paper P as the transport motor 27 rotates in the reverse direction. Is counted (counted).

Next, double-sided printing in the printer 11 will be described.
As shown in FIG. 1, the paper P fed out from the storage unit 30 is fed to the recording position through the transport path 24. The paper P is recorded on the front surface (upper surface) by the recording head 15, and the rear end of the paper P passes through the detection position Dp as the conveyance roller pair 22 and the discharge roller pair 23 rotate in the positive direction. It is conveyed to. At this stage, the feeding process of the paper P is completed, and then the paper P shifts to the reversing process as the conveyance roller pair 22 and the discharge roller pair 23 rotate in the reverse direction.

  In the reversal process, the paper P is reversed while passing through the merge position G 1, the return path 25, the merge position G 2, and the transport path 24. That is, the return path 25 and the second path portion 24 b of the transport path 24 constitute an inversion path 67 for inverting the paper P. The transport unit 20 functions as a reversing unit.

  After the trailing edge of the paper P in the reversing process is separated from the transport roller pair 22, the transport motor 27 finishes driving in the reverse direction and resumes driving in the forward direction. The reversal transport amount Ne corresponding to the reverse drive amount of the transport motor 27 for reversing the paper P is set according to the length of the reversal path 67.

  When driving of the transport motor 27 in the forward direction is resumed, the reversed paper P passes through the merging position G1 again and is transported to the recording position. Then, recording is performed on the back side by the recording head 15, whereby double-sided printing on the paper P is performed.

Next, the feeding of the succeeding paper P2 in the printer 11 will be described.
In the printer 11, after recording on the back surface of the preceding paper P <b> 1, the feeding control device 14 adjusts the interval Sd between the preceding paper P <b> 1 and the succeeding paper P <b> 2 in order to quickly record on the front surface of the subsequent paper P <b> 2. It is supposed to be. The interval Sd is the interval between the rear end of the reversed preceding paper P1 aligned in the feeding direction on the transport path 24 and the front end of the newly fed succeeding paper P2, and the preceding paper P1. And a subsequent sheet P2 are set to an arbitrary value of zero or more so that they do not overlap.

  When a plurality of sheets P are continuously fed, at the timing when the rear end of the preceding sheet P1 reaches the trigger position Tp arranged on the return path 25 in order to secure an appropriate interval Sd. The feeding control device 14 controls the conveying device 13 so that feeding of the succeeding paper P2 is started. That is, the trigger position Tp is the rear end position in the reverse path 67 of the preceding sheet P1 that determines the feeding timing for feeding the succeeding sheet P2, and is the distance Sd and the length of the feeding path 32 (the feeding path length). Lf). Thereby, after the trailing edge of the preceding sheet P1 passes the merging position G2, feeding of the succeeding sheet P2 is started so that the leading edge of the succeeding sheet P2 reaches the merging position G2 with a gap Sd.

  Here, if the reverse path length from the trigger position Tp to the merging position G2 is Sa, Sa = Lf−Sd. Further, assuming that the reverse path length from the detection position Dp to the merge position G2 is Lb and the reverse path length from the detection position Dp to the trigger position Tp is Sb, Sb = Lb−Sa = Lb− (Lf−Sd) = Lb−Lf + Sd.

  In the printer 11, as the feeding timing of the succeeding paper P2, after the PE sensor 38 detects the preceding paper P1 in the reversal process, the transport amount of the preceding paper P1 exceeds the adjusted transport amount Nc. The feeding control unit 62 issues a feeding instruction for the succeeding paper P2. In other words, the adjusted transport amount Nc corresponds to the transport amount from when the leading edge of the preceding sheet P1 reaches the detection position Dp to when the trailing edge of the preceding sheet P1 reaches the trigger position Tp.

  Here, assuming that the transport path length from the joining position G2 through which the paper P passes at the time of feeding to the recording position to the detection position Dp is Lh and the set length Ls = Lh + Sa = Lh + Lf−Sd, the length Lp of the preceding paper P1. Is shorter than the set length Ls (Lp <Ls, see FIG. 1), when the leading edge of the reversed preceding paper P1 reaches the detection position Dp, the trailing edge has already passed the trigger position Tp. . For this reason, when the length Lp of the preceding paper P1 is less than the set length Ls, the transport amount after the PE sensor 38 detects the leading edge of the preceding paper P1 before inversion exceeds the adjusted transport amount Nc. Then, the feeding instruction of the succeeding paper P2 is performed.

  On the other hand, when the length Lp of the preceding paper P1 is equal to or longer than the set length Ls (Lp ≧ Ls), when the leading edge of the reversed preceding paper P1 reaches the detection position Dp, the trailing edge is still at the trigger position Tp. (See FIG. 8). Therefore, when the length Lp of the preceding paper P1 is equal to or longer than the set length Ls, when the transport amount after the PE sensor 38 detects the leading edge of the preceding paper P1 after the inversion exceeds the adjusted transport amount Nc, An instruction for feeding the subsequent sheet P2 is issued. That is, the set length Ls is a length that allows the PE sensor 38 to detect the leading edge of the preceding sheet P1 after the reversal when the trailing edge of the preceding sheet P1 in the reversing process reaches the trigger position Tp. Is set to a value that can be determined.

  When the length Lp of the preceding paper P1 is less than the set length Ls, the adjusted conveyance amount Nc = Lp + Sb = Lp + Lb−Lf + Sd. At this time, since the transport motor 27 is driven in the reverse direction, the adjusted transport amount Nc is counted by the counter 65 for reverse rotation.

  On the other hand, when the length Lp of the preceding paper P1 is equal to or longer than the set length Ls, the adjustment transport amount Nc = Lp−Ls = Lp− (Lh + Sa) = Lp−Lh−Lf + Sd. At this time, since the transport motor 27 is driven in the forward direction, the adjusted transport amount Nc is counted by the forward rotation counter 64.

  That is, when the length Lp of the preceding paper P1 is equal to or longer than the set length Ls, the adjustment transport amount Nc becomes long when the transport amount is counted after the preceding paper P1 before reversal is detected. Further, when the trailing edge of the preceding paper P1 reaches the trigger position Tp, the leading edge is finished to be reversed and held between the pair of conveying rollers 22 (see FIG. 9), and the forward rotation of the conveying motor 27 has been resumed. Therefore, the transport amount cannot be counted only by the reverse counter 65. Therefore, when the length Lp of the preceding sheet P1 is equal to or longer than the set length Ls, the conveyance amount is started after detecting the preceding sheet P1 after being inverted.

  As described above, the feeding path length Lf is used to determine the set length Ls and the adjustment transport amount Nc. The length of the feeding path 32 is the amount of stacked sheets P (remaining amount) of the paper P in the storage unit 30. Will change accordingly. Specifically, the feeding path 32 is the shortest when the amount of paper P stored is the maximum value, and the feeding path 32 becomes longer as the remaining amount of the paper P decreases. Therefore, when the remaining amount of the paper P is reduced, the interval Sd is increased.

  Therefore, the length of the feeding path 32 used for determining the adjusted conveyance amount Nc is controlled based on the detection signal from the rotary encoder 37 while using the length when the accommodation amount is the maximum value as a reference value. The correction unit 59 of the device 50 performs correction. Then, the set length Ls and the adjusted transport amount Nc are also corrected by calculating the set length Ls and the adjusted transport amount Nc using the corrected feeding path length Lf. That is, in the present embodiment, the rotary encoder 37 functions as a feed path length detection unit that detects the length of the feed path 32, and the correction unit 59 sets the adjusted transport amount Nc based on the detection result of the rotary encoder 37. A correcting means for correcting is configured.

  Note that the length Lp of the preceding sheet P1 used for determining the adjusted conveyance amount Nc is calculated by the PE sensor detecting both ends in the feeding direction of the preceding sheet P1 in the feeding process before the front surface printing. And is stored in the RAM by the acquisition unit 57. In addition, actual measurement values (or design values) are stored in the ROM or the like as the reference values for the transport path length Lh, the reverse path length Lb, and the feed path length.

  Further, the corrected feeding path length Lf may be stored in, for example, a non-volatile memory, and the value corrected as needed based on the detection signal of the rotary encoder 66 may be rewritten. The interval Sd may be stored in advance in the ROM as one or a plurality of set values, or may be arbitrarily changed by storing it in a nonvolatile memory or the like.

  The set length Ls = Lh + Lf−Sd determined based on the transport path length Lh, the feed path length Lf, and the interval Sd is stored in each memory at the time of comparison with the length Lp of the preceding sheet P1. The value may be calculated based on the value, or when the feeding path length Lf and the interval Sd are constant, the value calculated in advance may be stored in a ROM or the like.

  Next, based on the flowcharts shown in FIGS. 3 and 4 and the operation diagrams shown in FIGS. 5 to 10, a print processing routine including feeding control in the case of performing duplex printing will be described. The computer 51 performs the control by the CPU executing a program stored in the ROM or the like.

As shown in FIG. 3, first, in step S11, the feeding control unit 62 starts feeding the preceding sheet P1 by instructing feeding of the sheet P, and proceeds to step S12.
In step S12, the conveyance control unit 63 causes the conveyance motor 27 to start rotating in the forward direction, and the process proceeds to step S13. Thereby, the rotation roller 26, the conveyance roller pair 22, and the discharge roller pair 23 start to rotate in the forward direction, and the preceding sheet P1 is fed toward the recording position.

  In step S13, it is determined whether the PE sensor 38 has detected the leading edge of the preceding paper P1, and the process proceeds to step S14. In this determination, the main control unit 55 monitors the output signal of the PE sensor 38, and when the output value changes from the OFF value (no paper) to the ON value (paper present), the PE sensor 38 detects the leading edge of the preceding paper P1. Is determined to have been detected. Then, if the PE sensor 38 does not detect the leading edge of the preceding paper P1, the main control unit 55 repeats the determination in step S13 until a determination of No (negative determination) is made and detected. When the PE sensor 38 detects the leading edge of the preceding paper P1, the main control unit 55 makes a Yes determination (positive determination) and proceeds to step S14.

  In step S14, the normal rotation counter 64 starts the normal rotation count in accordance with an instruction from the main control unit 55, and proceeds to step S15. When the leading edge of the preceding paper P1 is detected by the PE sensor 38, the paper P is cued. That is, the PE sensor 38 functions as a leading edge detection sensor for performing cueing, and the paper P is conveyed to the recording start position based on the count value of the normal rotation counter 64.

  In step S15, the main control unit 55 outputs a control command for starting printing on the surface of the preceding paper P1 to the print control unit 61, and proceeds to step S16. Thereby, when the preceding paper P1 reaches the recording start position by cueing, printing on the front surface is started.

  In step S16, it is determined whether or not the PE sensor 38 has detected the trailing edge of the preceding paper P1. Then, when the output value of the PE sensor 38 changes from the ON value (paper present) to the OFF value (paper absent), the main control unit 55 determines Yes and proceeds to step S17. On the other hand, if the output value of the PE sensor 38 does not change, the main control unit 55 determines No and repeats the determination in step S16 until the trailing edge of the preceding sheet P1 is detected.

In step S17, in accordance with an instruction from the main controller 55, the normal rotation counter 64 ends the normal rotation count, and the process proceeds to step S18.
In step S18 (calculation step), the calculation unit 60 calculates the length Lp of the preceding paper P1 based on the count value of the forward rotation counter 64, and the process proceeds to step S19. That is, in step S13 and step S16, since both ends in the feeding direction of the preceding sheet P1 fed through the transport path 24 are detected, the calculation unit 60 determines the length Lp of the preceding sheet P1 based on the detection result. Is calculated. Further, the acquisition unit 57 acquires the calculated length Lp of the preceding paper P1, and stores it in the RAM. When the normal rotation count is completed, the normal rotation counter 64 is reset.

  In step S19, the main control unit 55 determines whether or not front side printing for the preceding paper P1 has been completed. If the front side printing has not been completed, the determination at step S19 is repeated until the determination is completed and the determination at step S19 is repeated.

  In step S20, the conveyance control unit 63 rotates the conveyance motor 27 in the reverse direction, and the process proceeds to step S21. In other words, the preceding paper P1 is finished by feeding to the position where the printing on the front surface is finished and the trailing edge passes through the detection position Dp, and the conveyance roller pair 22 and the discharge roller pair 23 are reversed. As the rotation starts, the process proceeds to the inversion process.

  In step S21 (detection step), the determination unit 58 determines whether or not the PE sensor 38 has detected the leading edge of the preceding paper P1 that is in the inversion process. The leading edge at this time refers to the leading edge (the right edge in FIG. 5) in the return direction of the preceding paper P1 whose output value changes from the OFF value (no paper) to the ON value (paper present). If the PE sensor 38 does not detect the leading edge of the preceding paper P1, the determination unit 58 makes a “No” determination and repeats the determination in step S21 until the PE sensor 38 detects the preceding paper P1. On the other hand, as shown in FIG. 5, when the leading edge of the preceding paper P1 reaches the detection position Dp and the PE sensor 38 detects the preceding paper P1, the determination unit 58 determines Yes and proceeds to step S22.

In step S22, in response to an instruction from the main controller 55, the counter 65 for reverse rotation starts the reverse count, and the process proceeds to step S23.
As shown in FIG. 4, in step S23, the determination unit 58 compares the length Lp of the preceding sheet P1 with the set length Ls, and if the length Lp of the preceding sheet P1 is less than the set length Ls, Yes A determination is made and the process proceeds to step S24.

  In step S24 (determination step), the determination unit 56 determines the adjusted transport amount Nc, and the process proceeds to step S25. That is, the determining unit 56 calculates the adjusted transport amount Nc = Lp + Lb−Lf + Sd because the length Lp of the preceding paper P1 is less than the set length Ls.

  In step S25 (determination step), it is determined whether or not the determination unit 58 has detected the count value N of the reverse counter 65, that is, whether the conveyance amount after the leading edge of the preceding paper P1 in the reversal process has exceeded the adjusted conveyance amount Nc. judge. If the count value N does not exceed the adjusted carry amount Nc, the determination of No is performed, and the determination in step S25 is repeated until the count value N exceeds the adjusted carry amount Nc. On the other hand, if the count value N exceeds the adjusted transport amount Nc, the determination of Yes is performed and the process proceeds to step S26.

  In step S26 (feeding instruction step), the feeding control unit 62 starts feeding the succeeding sheet P2 by instructing feeding of the succeeding sheet P2, and proceeds to step S27. When the determination result in step S25 is affirmative, the trailing edge of the preceding paper P1 has reached the trigger position Tp in the reverse path 67 as shown in FIG. That is, the feeding control unit 62 instructs the subsequent target to be fed at the feeding timing at which the trailing edge of the preceding paper P1 reaches the trigger position Tp. As a result, as shown in FIG. 1, the succeeding sheet P2 is fed through the transport path 24 continuously with the inverted preceding sheet P1 while maintaining a gap Sd with the preceding sheet P1.

  In step S <b> 27, the determination unit 58 determines whether or not the count value N of the reverse counter 65 exceeds the reverse transport amount Ne. If the count value N does not exceed the reversal transport amount Ne, the determination of No is performed, and the determination in step S27 is repeated until the count value N exceeds the reversal transport amount Ne. On the other hand, when the count value N exceeds the reversal conveyance amount Ne, the determination of Yes is performed and the process proceeds to step S28.

  In step S28, the conveyance control unit 63 causes the conveyance motor 27 to start rotating in the forward direction, and the process proceeds to step S29. Thereby, the conveyance roller pair 22 and the discharge roller pair 23 resume rotation in the forward direction. Note that when the rotation of the transport motor 27 in the forward direction is resumed, the reverse counter 65 ends counting and the reverse counter 65 is reset. Although not shown, after step S28, the leading edge of the preceding paper P1 is detected by the PE sensor 38, and cueing is performed based on the detection result.

  In step S29, the main control unit 55 outputs a control command for starting printing on the back surface of the preceding paper P1 to the print control unit 61, and proceeds to step S30. Thus, when the preceding paper P1 reaches the recording start position by cueing, printing on the back surface is started.

  In step S30, the main control unit 55 determines whether or not the back side printing for the preceding paper P1 has been completed. If the reverse side printing has not been completed, the determination in step S30 is repeated until the determination is completed after the determination of No. If the determination is completed, the determination of Yes is performed and the duplex printing of the preceding paper P1 is completed.

As shown in FIG. 7, when the length Lp of the preceding paper P1 is equal to or longer than the set length Ls, the determination unit 58 determines No in step S23 and proceeds to step S31.
In step S31 (determination step), the determination unit 56 determines the adjusted transport amount Nc, and the process proceeds to step S32. That is, the determination unit 56 calculates the adjusted transport amount Nc = Lp−Lh−Lf + Sd because the preceding sheet P1 is equal to or longer than the set length Ls.

  In step S <b> 32, the determination unit 58 determines whether or not the count value N of the reverse rotation counter 65 exceeds the reverse conveyance amount Ne. If the count value N does not exceed the reversal transport amount Ne, the determination of No is performed, and the determination in step S32 is repeated until the count value N exceeds the reversal transport amount Ne. On the other hand, when the count value N exceeds the reversal transport amount Ne, the determination of Yes is performed and the process proceeds to step S33.

  In step S33, the conveyance control unit 63 causes the conveyance motor 27 to start rotating in the forward direction, and the process proceeds to step S34. Thereby, the conveyance roller pair 22 and the discharge roller pair 23 resume rotation in the forward direction. Note that when the rotation of the transport motor 27 in the forward direction is resumed, the reverse counter 65 ends counting and the reverse counter 65 is reset.

  In step S34 (detection step), the determination unit 58 determines whether or not the PE sensor 38 has detected the leading edge of the preceding paper P1 after being inverted. If the PE sensor 38 does not detect the leading edge of the preceding paper P1, the determination unit 58 makes a “No” determination and repeats the determination in step S34 until the PE sensor 38 detects the preceding paper P1. On the other hand, as shown in FIG. 8, when the leading edge of the preceding paper P1 after reversal reaches the detection position Dp, the output value of the PE sensor 38 changes from the OFF value (without paper) to the ON value (with paper). The determination unit 58 determines Yes and proceeds to step S35.

  In step S35, in response to an instruction from the main control unit 55, the forward rotation counter 64 starts counting forward rotation, and the process proceeds to step S36. When the leading edge of the preceding paper P1 is detected by the PE sensor 38, the leading paper P1 is cued based on the detection result.

  In step S36, the main control unit 55 outputs a control command for starting printing on the back surface of the preceding paper P1 to the print control unit 61, and proceeds to step S37. Thus, when the preceding paper P1 reaches the recording start position by cueing, printing on the back surface is started.

  In step S37 (determination step), it is determined whether or not the determination unit 58 has detected the count value N of the normal rotation counter 64, that is, whether or not the conveyance amount after the leading edge of the preceding paper P1 in the reversal process has exceeded the adjusted conveyance amount Nc. judge. If the count value N does not exceed the adjusted carry amount Nc, the determination of No is performed, and the determination in step S25 is repeated until the count value N exceeds the adjusted carry amount Nc. On the other hand, if the count value N exceeds the adjusted transport amount Nc, a Yes determination is made and the process proceeds to step S38.

  In step S38 (feeding instruction step), the feeding control unit 62 starts feeding the succeeding sheet P2 by instructing feeding of the succeeding sheet P2, and proceeds to step S39. When the determination result in step S37 is affirmative, the trailing edge of the preceding paper P1 has reached the trigger position Tp in the reverse path 67 as shown in FIG. That is, the feeding control unit 62 instructs the subsequent target to be fed at the feeding timing at which the trailing edge of the preceding paper P1 reaches the trigger position Tp. As a result, as shown in FIG. 10, the succeeding sheet P2 is fed through the transport path 24 continuously with the inverted preceding sheet P1 while maintaining the interval Sd with the preceding sheet P1.

  In step S39, the main control unit 55 determines whether or not the back side printing for the preceding paper P1 is completed. If the reverse side printing has not been completed, the determination in step S39 is repeated until the determination is completed after the determination of No. If the determination is completed, the determination of Yes is performed and the duplex printing of the preceding sheet P1 is completed.

  When three or more sheets P are continuously fed, after the first preceding sheet P1 is discharged, the second succeeding sheet P2 becomes a new preceding sheet P1. By repeating the process, the third sheet P is fed as the subsequent sheet P2.

Therefore, according to the above embodiment, the following effects can be obtained.
(1) The feeding timing for instructing feeding of the succeeding sheet P2 is determined based on the adjusted conveyance amount Nc after the PE sensor 38 detects the preceding sheet P1 in the reversing process. That is, the feeding timing is determined based on the conveyance status of the preceding paper P1 in the reversal process and the length Lp in the feeding direction of the preceding paper P1 to be fed. It is possible to continuously feed the succeeding paper P2 while maintaining the interval Sd.

  Further, since the feeding timing is determined based on the length Lp of the preceding paper P1 that is actually fed, when the paper size set in the print data is different from the actually fed paper size In addition, an appropriate interval Sd can be secured.

  (2) When the preceding paper P1 is equal to or longer than the set length Ls, the detection target of the PE sensor 38 is the preceding paper P1 after the reversal, so that the adjustment conveyance is more than the case where the detection target is the preceding paper P1 before the reversal. The amount Nc can be shortened. Thereby, the conveyance error after detecting the preceding sheet P1 can be reduced. Further, when the preceding sheet P1 is less than the set length Ls, the feeding control unit 62 sets the detection target of the PE sensor 38 as the preceding sheet P1 before the reversal, so that the succeeding sheet P2 is reversed in the preceding sheet P1 reversal process. Feeding can be started.

  (3) Based on the set length Ls, it is determined whether or not the PE sensor 38 can detect the leading end of the preceding sheet P1 after the leading edge of the preceding sheet P1 has reached the trigger position Tp. be able to.

  (4) Since the correction unit 59 corrects the adjusted conveyance amount Nc based on the detection result of the rotary encoder 37, an appropriate timing can be obtained even when the length of the feeding path 32 changes due to the increase / decrease of the stacking amount of the paper P. Then, the succeeding paper P2 can be fed.

  (5) Since the feeding timing of the succeeding sheet P2 is determined based on the length of the preceding sheet P1 actually fed to the transport path 24, it is appropriate even when the sizes of the preceding sheet P1 and the succeeding sheet P2 are different. Continuous feeding can be performed at a small interval Sd. Further, even when the preceding paper P1 having a size larger than the paper size set in the print data is fed, interference with the subsequent paper P2 can be avoided. Further, even when the preceding paper P1 having a size smaller than the paper size set in the print data is fed, the interval Sd is not excessive.

  (6) The length Lp of the preceding paper P1 is calculated using the PE sensor 38 that detects the leading edge of the paper P for cueing, and the preceding paper P1 that is in the inversion process can be detected. There is no need to provide a sensor. For example, if the printer includes a PE sensor for performing cueing, it is not necessary to add a new PE sensor.

  (7) Since the adjusted conveyance amount Nc can be counted using the forward rotation counter 64 or the reverse rotation counter 65 for controlling the driving of the conveyance motor 27, it is not necessary to provide a dedicated counter.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, a part of the configuration of the transport unit 20 is different from the first embodiment. Therefore, in the following description, parts different from those of the first embodiment will be mainly described, and the same or corresponding member configurations as those of the first embodiment are denoted by the same reference numerals, and redundant description will be omitted. To do.

  As shown in FIG. 11, the transport unit 20 of the second embodiment is transported in both forward and reverse directions by a driving force of a transporting motor 27 and a substantially planar transporting path 24 </ b> A, a substantially curved reversing path 25 </ b> A. And a roller 68. One end (right end) of the transport path 24A is connected to the reverse path 25A at the merge position G0. Further, the transport roller 68 rotates in the same direction as the transport roller pair 22 and the discharge roller pair 23.

  The preceding paper P1 fed out from the storage unit 30 to the feeding path 32 is conveyed (fed) by the conveying roller 68 in the feeding direction which is the left direction in FIG. Further, the preceding paper P1 on which the recording on the front surface has been performed is transported (returned) in the right direction (return direction) that is opposite to the feeding direction in the transport path 24A, thereby reaching the reversal path 25A. Then, the preceding paper P1 is reversed by the reversing path 25A as the rotating roller 26 rotates in the clockwise direction in FIG. 11, and then conveyed again toward the recording position through the conveying path 24A as shown in FIG. Is done.

  Here, the conveyance path length from the merge position G0 to the detection position Dp is Lh1, the reverse path length is Lr, the feed path length is Lf, and the reverse path length from the trigger position Tp to the merge position G0 is Sa = Assuming Lf−Sd, the set length Ls = Lh1 + Sa = Lh1 + Lf−Sd.

  As shown in FIG. 11, when the length Lp of the preceding paper P1 is less than the set length Ls, the adjusted transport amount Nc = Lp + Lh1 + Lr−Sa = Lp + Lh1 + Lr− (Lf−Sd) = Lp + Lh1 + Lr−Lf + Sd. In this case, the succeeding paper P2 is fed when the transport amount after the leading edge of the preceding paper P1 in the reversing process before the reversal is detected by the PE sensor 38 exceeds the adjusted transport amount Nc. Be started.

  On the other hand, as shown in FIG. 12, when the length Lp of the preceding paper P1 is equal to or longer than the set length Ls, the adjusted transport amount Nc = Lp−Ls = Lp− (Lh1 + Lf−Sd) = Lp−Lh1−Lf + Sd. In this case, the feeding of the succeeding paper P2 is started when the transport amount after the leading edge of the preceding paper P1 after the reverse is detected by the PE sensor 38 exceeds the adjusted transport amount Nc.

Therefore, also in the printer 11 including the transport device 13 configured as in the second embodiment, the same effect as in the first embodiment can be obtained.
In addition, you may change each said embodiment as follows.

The feeding roller 31 may be rotated by the driving force of the transport motor 27.
-After calculating the length Lp of the preceding paper P1 in step S18, the adjusted transport amount Nc may be determined based on the calculation result.

  The printer 11 may include a plurality of storage units 30 that store different sizes of paper P, and may be continuously fed in a state where different sizes of paper P are mixed. Also in this case, continuous paper feeding can be performed while maintaining an equal interval Sd between the preceding paper P1 and the succeeding paper P2 of different sizes.

The transport path 24, the return path 25, and the feed path 32 can be configured by arbitrary path forming members. Also, the length and shape can be arbitrarily changed.
The rotary encoder 37 and the correction unit 59 may not be provided. For example, when the paper P is held in a state of being biased from below in the storage unit 30, the length of the feeding path 32 does not change according to the change in the remaining amount of the paper P. There is no need to correct the adjusted conveyance amount Nc.

A dedicated counter for counting the adjusted conveyance amount Nc may be provided.
The preceding paper P1 may be discharged through the transport path 24 without printing on the back surface after being reversed. As described above, the present invention can also be applied when paper is discharged face down with the printing surface (front surface) facing downward.

  The acquisition unit 57 may acquire the length of the preceding paper P1 based on the paper size set in the print data. In this case, it is also possible to determine whether or not the set paper size is correct based on the detection result of the PE sensor 38 that detects both ends of the preceding paper P1 to be fed in the feeding direction. Good.

  In each embodiment, the recording apparatus is embodied as an ink jet printer. However, a liquid ejecting apparatus that ejects or discharges a liquid (recording material) other than ink may be employed. The present invention can be used for various liquid ejecting apparatuses including a liquid ejecting head that ejects liquid droplets. In addition, a droplet means the state of the liquid discharged from the said liquid ejecting apparatus, and shall also include what pulls a tail in granular shape, tear shape, and thread shape. The liquid here may be any material that can be ejected by the liquid ejecting apparatus. For example, it may be in the state when the substance is in a liquid phase, such as a liquid state with high or low viscosity, sol, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals (metal melts ) And a liquid as one state of a substance, as well as a material in which particles of a functional material made of a solid such as a pigment or metal particles are dissolved, dispersed or mixed in a solvent. Further, representative examples of the liquid include ink and liquid crystal as described in the above embodiment. Here, the ink includes general water-based inks and oil-based inks, and various liquid compositions such as gel inks and hot melt inks. As a specific example of the liquid ejecting apparatus, for example, a liquid containing a material such as an electrode material or a color material used for manufacturing a liquid crystal display, an EL (electroluminescence) display, a surface emitting display, or a color filter in a dispersed or dissolved form. It may be a liquid ejecting apparatus for ejecting, a liquid ejecting apparatus for ejecting a bio-organic material used for biochip manufacturing, a liquid ejecting apparatus for ejecting a liquid as a sample used as a precision pipette, a printing apparatus, a microdispenser, or the like. In addition, transparent resin liquids such as UV curable resin to form liquid injection devices that pinpoint lubricant oil onto precision machines such as watches and cameras, and micro hemispherical lenses (optical lenses) used in optical communication elements. A liquid ejecting apparatus that ejects a liquid onto the substrate or a liquid ejecting apparatus that ejects an etching solution such as an acid or an alkali to etch the substrate may be employed. The present invention can be applied to any one of these injection devices.

In each embodiment, the recording apparatus can be changed to an arbitrary recording method such as a dot impact printer.
The present invention may be applied to a scanner, a fax machine, a copier, or a multifunction machine having these functions in addition to a printer.

  The feeding control device 14 is not limited to a recording device that performs recording, and may be provided in a processing device that performs various processes such as transfer of a foil and sticking of a seal or the like. Further, the processing is not limited to processing the target, but may be, for example, inspection for inspecting the processing result of each processing processing, photographing for capturing an image, or the like.

  DESCRIPTION OF SYMBOLS 11 ... Printer as recording apparatus, 14 ... Feed control apparatus, 15 ... Recording head as recording means, 20 ... Conveying section as conveying means and reversing means, 21 ... Feeding section as feeding means, 24, 24A ... transport path, 25A, 67 ... reverse path, 32 ... feed path, 37 ... rotary encoder as feed path length detection means, 38 ... PE sensor as target detection means, 56 ... decision section as decision means, 58 A determination unit as a determination unit, 59 a correction unit as a correction unit, 60 a calculation unit as a calculation unit, 62 a feeding control unit as a feeding instruction unit, Dp a detection position, Lp a length of a preceding sheet Ls ... set length, Nc ... adjusted transport amount, P, P1, P2 ... paper as a target, P1 ... preceding paper as a preceding target, P2 ... following as a subsequent target , Tp ... trigger position.

Claims (6)

A feeding control device that controls feeding means for feeding a target to a conveyance path connected to a reversing path,
Target detection means for detecting the target at a detection position arranged on the transport path;
Calculation means for calculating the length of the preceding target based on the detection result of the target detecting means for detecting both ends in the feeding direction of the preceding target to be fed;
Determining means for determining an adjustment conveyance amount for determining a feeding timing based on the length of the preceding target;
As the feeding timing, after the target detecting means detects the preceding target in the reversal process, a feeding instruction for instructing feeding of the subsequent target when the carrying amount of the target exceeds the adjusted carrying amount And a feeding control device. A determination unit for determining whether the length of the preceding target is equal to or longer than a set length;
When the preceding target is equal to or longer than the set length, the feeding instructing unit is configured so that the transport amount after the target detecting unit detects the preceding target after reversal exceeds the adjusted transport amount. When a feeding instruction is issued and the preceding target is less than the set length, the feeding amount after the target detecting means detects the preceding target before inversion exceeds the adjusted transport amount. The feeding control apparatus according to claim 1, wherein a feeding instruction is performed. The feeding instruction means performs the feeding instruction when a rear end of the preceding target reaches a trigger position in the reverse path,
The set length determines whether or not the tip after the reverse of the preceding target can be detected by the target detection means when the trailing end of the preceding target in the reverse process reaches the trigger position. The feeding control device according to claim 2, wherein the feeding control device is set to a possible value. A feed path length detection means for detecting the length of the feed path of the target that changes in accordance with the stacking amount of the target held in a stacked state in preparation for feeding;
The feeding according to any one of claims 1 to 3, further comprising a correcting unit that corrects the adjusted conveyance amount based on a detection result of the feeding path length detecting unit. Control device. A feeding control method for controlling feeding means for feeding a target to a conveyance path connected to a reversing path,
A calculation step of calculating the length of the preceding target based on the detection result of detecting both ends in the feeding direction of the preceding target to be fed at the detection position arranged on the transport path;
A determination step of determining an adjustment conveyance amount that determines a feeding timing based on the length of the preceding target;
A detection step of detecting a preceding target in the inversion process at the detection position;
A determination step of determining whether or not a conveyance amount after being detected at the detection position of the preceding target in a reversal process exceeds the adjusted conveyance amount;
And a feeding instruction step for instructing feeding of a subsequent target at the feeding timing at which the determination result of the determination step is affirmative. A feeding means for feeding the target to a conveyance path connected to the reverse path;
Transport means for transporting the target along the transport path;
Recording means for recording on the target in the transport path;
Reversing means for reversing the recorded target in the reversing path;
A recording apparatus comprising: the feeding control device according to claim 1.

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