JP2020082680A - Recording device and recording method - Google Patents

Abstract

To adjust an influence by variation in back tension applied to a recording medium when the recording medium wound in a roll shape is delivered and conveyed with simple constitution.SOLUTION: A recording device 100 includes: a recording medium holding part 116 which holds a recording medium 101 wound in a roll shape and rotates together with the recording medium 101 when the held recording medium 101 is delivered; a rotational speed detection part 201 which detects a rotational speed of the recording medium holding part 116 when the recording medium 101 is delivered by the recording medium holding part 116; an encoder sensor 118 which detects a delivery speed of the recording medium 101 delivered by the recording medium holding part 116; and a CPU 301 which changes a discharge timing of ink to the recording medium 101 according to a diameter of the recording medium 101 held by the recording medium holding part 116 determined on the basis of the rotational speed and the delivery speed.SELECTED DRAWING: Figure 2

Description

The present invention relates to a recording device that records an image by ejecting ink onto a recording medium.

2. Description of the Related Art Conventionally, there is known a recording apparatus that feeds a recording medium wound in a roll shape while adjusting the back tension in the feeding direction and conveys the recording medium, and records an image on the conveyed recording medium.

In Patent Document 1, a rotating shaft that rotates in accordance with the conveying speed of a sheet wound in a roll shape, a rotating speed detecting unit that detects the rotating speed of the rotating shaft, and a brake torque that is provided on the rotating shaft to adjust the brake torque. And an unwinding brake. In the device of Patent Document 1, the diameter of the sheet wound around the rotation shaft is calculated from the rotation speed of the rotation shaft detected by the rotation speed detection unit and the sheet conveyance speed. Then, in the device of Patent Document 1, by controlling the unwinding brake and adjusting the brake torque, the back shaft provided to the unwound sheet is rotated by rotating the rotating shaft with a torque according to the calculated diameter. Adjust the tension.

JP-A-4-094357

However, in Patent Document 1, since an adjusting mechanism for adjusting the back tension of the seat is required, there is a problem that the number of parts increases, the cost increases, and the size of the apparatus increases.

It is an object of the present invention to provide a recording apparatus capable of adjusting the influence of the fluctuation of the back tension applied to the recording medium when the recording medium wound in a roll is fed, with a simple configuration. ..

The recording apparatus of the present invention is a recording apparatus for recording an image by ejecting ink onto a recording medium, which holds a recording medium wound in a roll shape, and the recording medium when the held recording medium is sent out. A holding unit that rotates integrally with the holding unit; a rotation speed detecting unit that detects a rotation speed of the holding unit when the recording medium is sent from the holding unit; and a sending speed of the recording medium sent from the holding unit. And a control means for changing the ejection timing of the ink to the recording medium according to the diameter of the recording medium held by the holding means, which is obtained based on the rotation speed and the feeding speed. It is characterized by having.

According to the present invention, it is possible to adjust the influence of the fluctuation of the back tension applied to the recording medium when the recording medium wound in a roll is delivered, with a simple configuration.

It is a schematic diagram showing a configuration of a recording apparatus according to an embodiment of the present invention. It is a block diagram showing a configuration of a recording apparatus according to an embodiment of the present invention. It is a perspective view of a recording medium supply unit according to an embodiment of the present invention. It is a figure which shows the internal structure of the recording medium supply part which concerns on embodiment of this invention. It is a flowchart which shows the recording pre-processing which concerns on embodiment of this invention. It is a figure which shows an example of the table used when calculating|requiring the correction amount which concerns on embodiment of this invention. It is a flowchart which shows the recording process which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Configuration of recording device>
The configuration of the recording apparatus 100 according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

Note that FIG. 2 shows an exemplary electrical configuration of the recording apparatus 100, and the electrical configuration of the recording apparatus 100 is not limited to this. For example, as another electrical configuration of the recording apparatus 100, CPUs may be dispersedly provided at a plurality of locations, and the plurality of CPUs may operate in cooperation to control the entire operation of the recording apparatus 100.

The recording device 100 is configured to be able to communicate with the host PC 320 via a wired or wireless communication line, and records an image in the recording area of the recording medium 101. The recording medium 101 is, for example, roll paper provided with a label as a plurality of recording areas on a mount. The recording apparatus 100 is exemplified by an inkjet recording apparatus here.

Specifically, the recording apparatus 100 includes a conveyance unit 102, a width regulation unit 103, a recording medium supply unit 104, a recording head 105, and a detection sensor 117 as shown in FIG. In addition, the recording device 100 includes a detection unit 200, a CPU 301, an interface 302, a ROM 303, an image memory 304, and a work RAM 305 as illustrated in FIG. 2. Further, the recording apparatus 100 includes an operation panel 306, a recording head control circuit 307, an output port 308, a motor drive unit 309, a head up/down motor 310, a capping motor 312, and a pump motor 313. ing.

The transport unit 102 transports the recording medium 101 fed from the recording medium supply unit 104 via the width regulating unit 103.

The width regulation unit 103 moves the recording medium 101 fed from the recording medium supply unit 104 in the transport direction A1 shown in FIG. 1 by a fixed reference wall 114 and a movable wall (not shown) facing the reference wall 114. The transport unit 102 is guided while restricting the movement in the width direction orthogonal to each other. The width regulating unit 103 detects the length of the recording medium 101 in the width direction based on the position of the movable wall that moves according to the size of the recording medium 101.

The recording medium supply unit 104 holds the recording medium 101 wound in a roll and feeds the held recording medium 101 to the width regulating unit 103.

The recording head 105 includes a recording head (Y) 105Y, a recording head (M) 105M, a recording head (C) 105C, and a recording head (K) 105K. The recording head (Y) 105Y ejects yellow (Y) ink. The recording head (M) 105M ejects magenta (M) ink. The recording head (C) 105C ejects cyan (C) ink. The recording head (K) 105K ejects black (K) ink.

Each of the recording head 105Y, the recording head 105M, the recording head 105C, and the recording head 105K has a plurality of nozzles that extend in a direction intersecting the transport direction A1 and that can eject ink. Each of these nozzles ejects ink using an ejection energy generating element such as an electrothermal conversion element (heater) or a piezo element. A nozzle using an electrothermal conversion element foams ink by heat generation and ejects the ink from the ejection port at the tip of the nozzle by utilizing foaming energy.

The recording head 105 is provided facing the upper part of the platen 112, and ejects ink droplets by driving the recording head control circuit 307 to record an image on the recording medium 101 transported by the transport unit 102.

The detection sensor 117 is provided on the upstream side of the recording head 105 with respect to the transport direction A1, detects the end of the recording medium 101 transported in the transport direction A1 or the return direction A2, and outputs the detection result to the CPU 301. .. The detection sensor 117 detects the edge of the recording medium 101 by detecting, for example, an edge mark indicating the edge of the recording medium 101 attached to the recording medium 101. The detection sensor 117 is, for example, a reflective photo sensor.

The detection unit 200 includes a light emitting unit 110 that emits light and a light receiving unit 111 that receives the light emitted from the light emitting unit 110 via the recording medium 101, and operates under the control of the CPU 301. The detection unit 200 detects the edge of the recording medium 101 based on the intensity of the light received by the light receiving unit 111, and outputs the detection result to the CPU 301. The detection unit 200 detects the edge of the recording medium 101 by detecting the edge mark attached to the recording medium 101, for example. The light emitting unit 110 constitutes, for example, the light emitting side of the transmissive photosensor unit. The light receiving section 111 constitutes, for example, the light receiving side of the transmissive photo sensor unit.

The CPU 301 as a control unit is an arithmetic processing device. The CPU 301 controls the recording operation from the start to the end of recording an image on the recording medium 101, or the operation of the recording apparatus 100 such as handling of the recording medium 101, by executing the processing program stored in the ROM 303. To do.

Specifically, the CPU 301 executes pre-recording processing when the recording medium 101 is first set in the recording medium holding unit 116 or when the recording medium 101 is replaced. In the pre-recording process, the CPU 301 uses the detection result input from the rotation speed detection unit 201, the pulse signal input from the encoder sensor 118, and the table stored in the ROM 303 to determine the ink ejection timing ( Change the recording timing).

Further, the CPU 301 executes recording processing based on a signal or the like input from the operation panel 306. In the recording process, the CPU 301 corrects the ink ejection timing based on the detection result input from the rotation speed detection unit 201, the pulse signal input from the encoder sensor 118, and the table stored in the ROM 303. And change. The CPU 301 outputs a control signal for controlling the drive frequency (ink ejection frequency) of the recording head 105 to the recording head control circuit 307 in order to eject ink at the changed ejection timing.

Further, in the recording process, the CPU 301 analyzes a command input from the interface 302, draws the image data of each color component of the recording data input from the interface 302 in the image memory 304 as a bit map. The CPU 301 sequentially reads the image data of the corresponding color from the image memory 304 in synchronization with the conveyance of the recording medium 101, and outputs the read image data to the recording head control circuit 307.

The CPU 301 outputs a control signal for driving the capping motor 312 and the head up/down motor 310 to the motor driving unit 309 via the output port 308.

The interface 302 receives the print data or command transmitted from the host PC 320 and outputs it to the CPU 301.

The ROM 303 stores processing programs, tables and the like corresponding to the control flow executed by the CPU 301.

In the image memory 304, the image data of each color component of the print data is bitmap-developed by the CPU 301.

The work RAM 305 is a memory that mainly provides a work area for the CPU 301.

The operation panel 306 detects an operation from the outside and outputs a signal corresponding to the operation to the CPU 301.

The printhead control circuit 307 drives the printhead 105 at a drive frequency controlled by a control signal input from the CPU 301, and based on image data input from the CPU 301, an image is printed on the print medium 101 by the printhead 105. Record.

The output port 308 outputs the control signal input from the CPU 301 to the motor drive unit 309.

The motor driving unit 309 controls driving of the carry motor 109, the head up/down motor 310, the capping motor 312, or the pump motor 313 based on a control signal input from the CPU 301 via the output port 308.

The head up/down motor 310 is driven by the control of the motor drive unit 309 to move the recording head (K) 105K, the recording head (C) 105C, the recording head (M) 105M, and the recording head (Y) 105Y to the recording position. Let

The capping motor 312 is driven by the control of the motor driving unit 309 to move a cap unit (not shown) between a position where the nozzle (not shown) of the recording head 105 is covered and a position where it is exposed to the outside.

The pump motor 313 is driven by the control of the motor driving unit 309 to supply ink to the recording head 105 or operate a pump unit (not shown) to perform a recovery operation of the recording head 105.

<Structure of transport section>
The configuration of the transport unit 102 according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

The transport unit 102 includes a transport roller 106, a pinch roller 107, a suction fan 108, a transport motor 109, a platen 112, a drive transmission belt 115, and an encoder sensor 118.

When the driving force is transmitted from the drive transmission belt 115, the conveyance roller 106 is driven to rotate in the forward direction to convey the recording medium 101 in the conveyance direction A1, or reversely driven to convey the recording medium 101 in the return direction A2. ..

The pinch roller 107 holds the recording medium 101 supported by the platen 112 together with the conveying roller 106 and conveys the recording medium 101 in the conveying direction A1 or the returning direction A2.

The suction fan 108 sucks the recording medium 101 supported by the platen 112 via a suction port (not shown) provided in the platen 112.

The carry motor 109 is driven by the control of the motor drive unit 309 to rotate the drive transmission belt 115.

The platen 112 supports the recording medium 101 to be conveyed.

The drive transmission belt 115 transmits the driving force of the carry motor 109 to the carry roller 106 to drive the carry roller 106 in the forward direction or the reverse direction.

The encoder sensor 118 serving as the delivery speed detecting means includes a code wheel 113 attached to the transport roller 106 and rotating together with the transport roller 106. By reading the code wheel 113, the encoder sensor 118 sends a pulse signal corresponding to the rotation amount or displacement amount of the code wheel 113 to the CPU 301 as a detection result of the delivery speed of the recording medium 101 delivered from the recording medium holding unit 116. Output.

<Configuration of recording medium supply unit>
The configuration of the recording medium supply unit 104 according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

The recording medium supply unit 104 has a recording medium holding unit 116, a rotation speed detection unit 201, a reference side support unit 202, and a non-reference side support unit 203. The recording medium supply unit 104 also includes a roll motor 401, a pulley 402, a belt 403, a gear 404, a torque limiter 405, and a drive transmission unit 408.

The recording medium holding unit 116 serving as a holding unit holds the recording medium 101 by press-fitting a shaft portion (not shown) into a hollow core at the center of the recording medium 101 wound in a roll shape, and holds the recording medium 101. The recording medium 101 rotates together with the recording medium 101. The driving force is transmitted from the gear 404 to the shaft portion of the recording medium holding unit 116, so that when the transport roller 106 is driven to rotate normally, the recording medium holding unit 116 rotates in the CW direction of FIG. The recording medium holding unit 116 transmits the driving force from the gear 404 to the shaft portion, so that when the transport roller 106 is reversely driven, the recording medium holding unit 116 rotates in the CCW direction of FIG. Send and feed.

The rotation speed detecting unit 201 as the rotation speed detecting means includes a code wheel 406 and a code wheel sensor 407. The code wheel 406 rotates by the driving force transmitted from the gear 404. The code wheel sensor 407 outputs a pulse signal corresponding to the rotation speed of the code wheel 406 to the CPU 301 as a detection result of the rotation speed of the recording medium holding unit 116.

The reference side support portion 202 rotatably supports one end of the shaft portion of the recording medium holding portion 116 in the axial direction.

The non-reference side support portion 203 rotatably supports the other end of the shaft portion of the recording medium holding portion 116 in the axial direction.

The roll motor 401 is provided inside the reference side support portion 202, is driven by the control of the motor driving portion 309, and transmits the driving force at the time of driving to the belt 403 to rotate the recording medium holding portion 116.

The pulley 402 is provided inside the reference side support portion 202 and is coupled to the gear 404, and transmits the driving force transmitted from the belt 403 to the gear 404.

The belt 403 is provided inside the reference side support portion 202 and transmits the driving force transmitted from the roll motor 401 to the pulley 402.

The gear 404 transmits the driving force transmitted from the pulley 402 to the drive transmission unit 408 and the rotation speed detection unit 201.

The torque limiter 405 is provided in the center of the gear 404 and is configured to apply a load as back tension to the recording medium 101 when the recording medium 101 is conveyed by the conveying unit 102.

The drive transmission unit 408 is connected to the shaft of the recording medium holding unit 116, and transmits the driving force transmitted from the gear 404 to the shaft of the recording medium holding unit 116.

<Recording preprocessing>
The pre-recording process according to the embodiment of the present invention will be described in detail with reference to FIGS. 5 and 6.

In the pre-recording process shown in FIG. 5, the recording medium 101 is first set in the recording medium holding unit 116 or the recording medium 101 is exchanged, the recording medium 101 is sent to the conveying unit 102, and the conveying roller 106 and the pinch roller 106 It is started when it is sandwiched with 107.

First, the CPU 301 outputs a control signal to the motor drive unit 309 to drive the carry motor 109 to carry the recording medium 101 in the carrying direction A1 by a predetermined distance, and then carry the same distance in the returning direction A2. The set sequence is executed (S1).

Here, the set sequence is a process for setting the recording medium 101 in the recording medium holding unit 116. The reason for executing this set sequence is that the setting or replacement of the recording medium 101 is performed by the user, so that the state of the recording medium 101 may vary, and such variation is canceled.

Next, the CPU 301, based on the pulse number of the pulse signal input from the rotation speed detection unit 201 and the gear ratio between the gear 404 and the code wheel 406 during the execution of the set sequence, the recording medium holding unit 116. The rotation speed of is calculated (S2). Further, the CPU 301 calculates the delivery speed of the recording medium 101 delivered from the recording medium holding unit 116 based on the number of pulses of the pulse signal input from the encoder sensor 118 during the execution of the set sequence.

In this way, the processing for calculating the rotation speed of the recording medium holding unit 116 and the delivery speed of the recording medium 101 can be executed in the set sequence, and the load accompanying the processing for changing the ink ejection timing can be reduced. You can The rotation speed of the recording medium holding unit 116 or the sending speed of the recording medium 101 may be calculated when the set sequence is not executed.

Next, the CPU 301 calculates the diameter of the recording medium 101 using the rotational speed detected by the rotational speed detection unit 201 and the delivery speed of the recording medium 101 detected by the encoder sensor 118 (S3).

Specifically, the recording medium 101 is sent a distance of 49.87 [μm] when the carry motor 109 is driven by 1 [pulse], and when the carry motor 109 is driven by 847 [PPS]. It is delivered in the transport direction A1 at a delivery speed of 50 [mm/sec]. When the code wheel sensor 407 detects 500 [PPS] of the slits of the code wheel 406 having one round of 1027 slits, the CPU 301 obtains 29.21 [rpm] as the rotation speed.

At this time, since the ratio of the pitch circle diameter of the gear integrated with the code wheel 406 and the pitch circle diameter of the drive transmission portion 408 is 1:1, the rotation speed of the recording medium holding portion 116 is also 29. It becomes 21 [rpm]. Therefore, since the CPU 301 rotates integrally with the drive transmission unit 408 and the recording medium 101, the diameter of the recording medium 101 is calculated from the rotation speed of 29.21 [rpm] and the delivery speed of 50 [mm/sec]. Is calculated as 32.69 [mm].

Next, the CPU 301 calculates the back tension applied to the recording medium 101 by dividing the load of the torque limiter of the drive transmission unit 408 by the radius of the recording medium 101 (S4).

Specifically, when the load of the torque limiter of the drive transmission unit 408 is 200 [gf·cm] and the diameter of the recording medium 101 is 32.69 [mm], the CPU 301 gives back to the recording medium 101. 122.4 [gf] is calculated as the tension.

Next, the CPU 301 outputs a control signal to the motor drive unit 309 to control the drive of the carry motor 109, thereby stopping the recording medium 101 at the standby position before the start of recording (S5).

Next, the CPU 301 obtains and sets the correction amount of the vertical magnification of the image to be recorded based on the calculated back tension and the table stored in the ROM 303 (S6), and thereafter ends the pre-recording process. Here, the vertical magnification is the magnification in the transport direction A1 of the image recorded on the recording medium 101.

Specifically, in the table stored in the ROM 303, the back tension shown as an example in FIG. 6 is associated with the vertical magnification of the image to be recorded. Note that the relationship between the back tension and the vertical magnification of the recorded image is linear in FIG. 6, but may be non-linear.

When the back tension applied to the recording medium 101 is 20.4 [gf], the image recorded on the recording medium 101 has a vertical magnification smaller than 100.00 [%] as compared with FIG. The vertical magnification is smaller than that of the actual image. Therefore, the CPU 301 refers to the table stored in the ROM 303 to obtain the vertical magnification when the back tension is 122.4 [gf]. Further, the CPU 301 subtracts the vertical magnification when the back tension is 122.4 [gf] from the vertical magnification of 100.00 [%] to obtain the vertical magnification correction amount, and uses the obtained vertical magnification correction amount as the work amount. It is stored in the RAM 305.

<Recording process>
The recording process according to the embodiment of the present invention will be described in detail with reference to FIG.

The recording process shown in FIG. 7 is a process of recording for each page as a plurality of recording areas, and is performed at a timing when a signal that detects an operation for starting the recording process on the operation panel 306 is input to the CPU 301 from the operation panel 306. Be started.

First, the CPU 301 starts the recording operation (S11). At this time, the CPU 301 outputs a control signal for controlling the ink ejection timing to the recording head control circuit 307 to determine the vertical magnification of the image recorded on the recording medium 101 as the pre-recording process stored in the work RAM 305. It is corrected by the correction amount obtained in. In this manner, when the recording process is started, the CPU 301 controls the ink ejection timing of the recording head 105 to be changed according to the correction amount obtained in the pre-recording process, thereby forming a highly accurate image. It can be carried out.

Next, during the recording operation, the CPU 301 rotates the recording medium holding unit 116 based on the number of pulses of the pulse signal input from the rotation speed detection unit 201 and the gear ratio between the gear 404 and the code wheel 406. The speed is calculated (S12). Further, the CPU 301 calculates the delivery speed of the recording medium 101 delivered from the recording medium holding unit 116 based on the pulse number of the pulse signal input from the encoder sensor 118 during the recording operation.

Next, the CPU 301 calculates the diameter of the recording medium 101 using the rotational speed detected by the rotational speed detection unit 201 and the delivery speed of the recording medium 101 detected by the encoder sensor 118 (S13).

Specifically, the recording medium 101 is sent a distance of 49.87 [μm] when the carry motor 109 is driven by 1 [pulse], and when the carry motor 109 is driven by 6018 [PPS]. It is delivered in the transport direction A1 at a delivery speed of 300 [mm/sec]. When the code wheel sensor 407 detects 500 [PPS] of the slits of the code wheel 406 having one round of 1027 slits, the CPU 301 obtains 29.21 [rpm] as the rotation speed. Therefore, the CPU 301 calculates 196.15 [mm] as the diameter of the recording medium 101 from the rotation speed of 29.21 [rpm] and the delivery speed of 300 [mm/sec].

Next, the CPU 301 calculates the back tension applied to the recording medium 101 by dividing the load of the torque limiter of the drive transmission unit 408 by the radius of the recording medium 101 (S14).

Specifically, when the load of the torque limiter of the drive transmission unit 408 is 200 [gf·cm] and the diameter of the recording medium 101 is 196.15 [mm], the CPU 301 gives back to the recording medium 101. 20.4 [gf] is calculated as the tension.

Next, the CPU 301 calculates the vertical magnification associated with the calculated back tension in the table stored in the ROM 303 (S15).

Next, the CPU 301 determines whether or not the vertical magnification calculated in step S15 deviates from the vertical magnification corrected when the recording operation is started in step S11 by a predetermined amount or more (S16). The predetermined amount is, for example, 0.05 [%] here.

When the deviation amount of the vertical magnification calculated in step S15 with respect to the vertical magnification corrected in step S11 is equal to or more than a predetermined amount (S16: Yes), the CPU 301 has completed the recording of the page as the recording area being recorded. It is determined whether or not (S17). Here, the forming accuracy of the image recorded on the recording medium is improved as the above-mentioned predetermined amount is decreased, while the productivity is improved as the above-mentioned predetermined amount is increased.

If the recording of the page being recorded is not completed (S17: No), the CPU 301 repeats the process of step S17.

On the other hand, when the recording of the page being recorded is completed (S17: Yes), the CPU 301 sets the vertical magnification calculated in step S15 as the correction amount (S18).

If the correction amount of the vertical magnification is set and the ink ejection timing of the recording head 105 is changed before the recording of the page being recorded is completed, the image is partially expanded and contracted within the same page to obtain the desired image. I will not be able to. Therefore, high-accuracy image formation can be performed by changing the ink ejection timing of the recording head 105 after the recording of the page being recorded is completed.

Next, the CPU 301 restarts the recording operation (S19). At this time, the CPU 301 outputs a control signal to the recording head control circuit 307 based on the correction amount of the vertical magnification set in step S18 to change the ink ejection timing of the recording head 105. Then, the CPU 301 ends the recording process.

On the other hand, when the deviation amount of the vertical magnification calculated in step S15 with respect to the vertical magnification corrected in step S11 is less than the predetermined amount (S16: No), the CPU 301 determines whether to continue recording (S20). ).

When continuing recording (S20: Yes), the CPU 301 returns to the process of step S12.

On the other hand, when the recording is not continued (S20: No), the CPU 301 ends the recording process.

Here, the reason why the ink ejection timing is changed when the deviation amount of the vertical magnification in step S16 is equal to or larger than the predetermined amount is that the diameter of the recording medium 101 continuously changes during recording, and the back tension also increases accordingly. This is because it will change. At this time, when the ink ejection timing of the recording head 105 is continuously controlled based on the correction amount of the vertical magnification set in the pre-recording process, the size of the image to be recorded also changes as the diameter of the recording medium 101 changes. It will change. Therefore, when the diameter of the recording medium 101 becomes smaller due to continuous recording, it is necessary to change the correction amount of the vertical magnification.

In the recording process shown in FIG. 7, the recording apparatus 100 can perform highly accurate image formation by continuously changing the vertical magnification correction amount during recording. Further, by changing the ink ejection timing when the deviation amount of the vertical magnification is equal to or more than a predetermined amount, the ink ejection timing is changed as compared with the case where the ejection timing is changed regardless of the deviation amount of the vertical magnification. It is possible to reduce the load associated with the processing.

As described above, in the present embodiment, ink is ejected onto the recording medium 101 according to the diameter of the recording medium 101 held by the recording medium holding unit 116, which is obtained based on the rotation speed and the delivery speed of the recording medium 101. Change the timing. This makes it possible to adjust the influence of the fluctuation of the tension applied to the recording medium 101 when the recording medium 101 wound in a roll is delivered, with a simple configuration.

Further, according to the present embodiment, it is possible to perform highly accurate image formation by adjusting the vertical magnification of the image recorded on the recording medium.

It is needless to say that the present invention is not limited to the above-mentioned embodiment and can be variously modified without departing from the gist thereof.

Specifically, in the above-described embodiment, the ink ejection timing may be changed when the correction amount of the vertical magnification obtained from the back tension is equal to or more than the predetermined amount even in the pre-recording process. In this case, it is possible to reduce the load involved in the process for changing the ink ejection timing.

Further, in the above-described embodiment, the diameter of the recording medium 101 is calculated in every predetermined cycle during the recording process, and the correction amount of the vertical magnification is calculated every time the diameter is calculated, and the ink ejection timing may be changed each time. Good.

100 Recording Device 101 Recording Medium 102 Conveying Section 103 Width Regulation Section 104 Recording Medium Supply Section 105 Recording Head 105C Recording Head (C)
105K recording head (K)
105M recording head (M)
105Y Recording head (Y)
106 Conveying Roller 107 Pinch Roller 108 Suction Fan 109 Conveying Motor 110 Light Emitting Section 111 Light Receiving Section 112 Platen 113 Code Wheel 114 Reference Wall 115 Drive Transmission Belt 116 Recording Medium Holding Section 117 Detection Sensor 118 Encoder Sensor 200 Detection Section 201 Rotational Speed Detection Section 202 Reference side support section 203 Non-reference side support section 301 CPU
302 Interface 303 ROM
304 image memory 305 work RAM
306 Operation panel 307 Recording head control circuit 308 Output port 309 Motor drive unit 310 Head up/down motor 312 Capping motor 313 Pump motor 401 Roll motor 402 Pulley 403 Belt 404 Gear 405 Torque limiter 406 Code wheel 407 Code wheel sensor 408 Drive transmission unit

Claims (8)

A recording device for recording an image by ejecting ink onto a recording medium,
Holding means for holding the recording medium wound in a roll shape and rotating integrally with the recording medium when the held recording medium is sent out,
Rotation speed detecting means for detecting a rotation speed of the holding means when the recording medium is sent out from the holding means,
Sending speed detecting means for detecting the sending speed of the recording medium sent from the holding means,
Control means for changing the ejection timing of ink to the recording medium according to the diameter of the recording medium held by the holding means, which is obtained based on the rotation speed and the delivery speed;
A recording apparatus having: The control means is
A correction amount of an image to be recorded on a recording medium is obtained from the diameter, and when the correction amount is a predetermined amount or more, the ejection timing is changed according to the correction amount,
The recording apparatus according to claim 1, wherein: The control means is
The back tension applied to the recording medium sent from the holding unit is obtained from the diameter, and the ejection timing is changed according to the back tension.
The recording apparatus according to claim 1 or 2, wherein: The control means is
Changing the ejection timing according to the diameter that changes during recording of an image on a recording medium,
The recording apparatus according to any one of claims 1 to 3, wherein: The control means is
When the recording on the recording area during the recording of the recording medium having a plurality of recording areas is completed, the ejection timing is changed.
The recording apparatus according to claim 4, wherein: The control means is
The diameter is obtained based on the rotation speed detected by the rotation speed detection means and the delivery speed detected by the delivery speed detection means during execution of a set sequence for setting the recording medium in the holding means.
The recording apparatus according to any one of claims 1 to 5, wherein: The control means is
By changing the discharge timing, the magnification of the image recorded on the recording medium in the transport direction of the recording medium is adjusted.
The recording apparatus according to any one of claims 1 to 6, wherein: A recording method in a recording device for recording an image by ejecting ink onto a recording medium,
Detecting a rotation speed of the holding unit that rotates integrally with the recording medium when the recording medium is fed from the holding unit that holds the recording medium wound in a roll shape,
Detecting the sending speed of the recording medium sent from the holding means,
Changing the ejection timing of the ink to the recording medium according to the diameter of the recording medium held by the holding unit, which is obtained based on the rotation speed and the delivery speed,
A recording method comprising:

Images