JP2012166406A - Image recording apparatus, and method of controlling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image recording apparatus, along with a method of controlling the same, which can correctly control a cutting position in relation to a recorded image, even when a web conveying position is deviated in a width direction, regarding an image recording apparatus used for web with a cutter device.SOLUTION: The image recording apparatus includes: an image recording unit which performs image recording to a recording medium; a paper sheet edge detector for detecting a conveying position of a recording medium; and a cutter unit which cuts a recording medium at a predetermined cutting position. In the image recording apparatus, a deviation amount between a center position in a width direction, of a recording medium, and a center position in a width direction, of a conveyance path, is measured based on the detection result by the paper sheet edge detector, and an interval between a starting timing of image recording and a cutting timing of a recording medium, is adjusted so that the recording medium is correctly cut at a predetermined cutting position in relation to an image-recorded position, according to the deviation amount.

Description

  The present invention relates to an image recording apparatus including a cutter device that records an image on a continuous recording medium and then cuts the recording medium downstream in the conveyance direction, and a method for controlling the image recording apparatus.

  In general, an image recording apparatus using a continuous recording medium (web) such as roll paper includes a cutter device that measures an amount of paper transported and automatically cuts the web at a specified length after recording an image. . As such a cutter device, there are a method of cutting in a state where the conveyance is once stopped before cutting the web and a method of cutting while conveying the web.

  As a method of stopping and cutting the web transport, for example, a rotary cutter that can move in the width direction of the web is used, and the web is cut at a desired position. On the other hand, as a method of cutting while transporting the web, for example, a cutter roller having a cutter blade in the length direction is used as a roller having a length greater than the width of the web, and the web is cut at a desired position.

In this case, a method of cutting the web gradually toward the downstream in the transport direction by attaching the cutter blade to the transport direction in an inclined manner. By gradually cutting the web, the cutting torque can be reduced, the sound during cutting is small, and the motor can be downsized. However, in any case, in an image recording apparatus provided with such a cutter device, it is necessary to accurately cut the web at a desired position.
For example, Patent Document 1 discloses a technique that includes a measurement unit that measures the length of a web that is cut downstream in the conveyance direction of the cutter device, and corrects the cut timing when the measured length deviates from a specified length. ing.

JP 2001-270178 A

  However, according to the technique described in Patent Document 1, the cut length can be corrected to a desired length, but the cut position cannot be corrected for the recorded image. That is, if the cut position with respect to the recorded image is shifted, the image position in the transport direction is shifted with respect to the cut recording medium.

  Further, in the method of gradually cutting toward the downstream in the transport direction, even when the cut length is adjusted to a desired length, if the web transport position is shifted in the width direction, the cutting timing is shifted, and the recorded image The cut position with respect to is shifted. In particular, even if the web is replaced while supporting a plurality of web widths, the number of parts and the cost increase in order to define the transport position with high accuracy. Therefore, it is a method of cutting gradually toward the downstream in the transport direction, and it is required that the cut position with respect to the recorded image does not shift even if the transport position of the web is shifted in the width direction.

  Therefore, the present invention provides an image recording apparatus including a cutter device, and an image recording apparatus capable of accurately controlling a cut position with respect to a recorded image even when the web conveyance position is shifted in the width direction. A control method is provided.

  In order to solve the above-described problem, according to the disclosed image recording apparatus, an image recording unit includes an image recording unit that records an image on a recording medium, and a cutter unit that cuts the recording medium at a predetermined position while transporting the recording medium. An apparatus, a paper edge detection unit that detects a width direction edge of the recording medium, a paper center position calculation unit that obtains a paper center position from a detection result of the paper edge detection unit, and the paper position center calculation unit When the result of the storage unit storing the calculation result of the sheet and the paper reference center position preset in the storage unit and the paper center position calculated and stored are shifted, according to the shift amount, A control unit that adjusts the interval between the recording timing and the cut timing is provided.

  Alternatively, according to the disclosed control method for an image recording apparatus, the image recording apparatus includes: an image recording unit that records an image on a recording medium; and a cutter unit that cuts the recording medium at a predetermined position while transporting the recording medium. A paper edge detection process for detecting a width direction edge of the recording medium, a paper center position calculation process for obtaining a paper center position from a detection result of the paper edge detection process, and the paper position center calculation unit. When the result of the calculation result stored in the storage unit and the result of the paper reference center position preset in the storage unit and the calculated and stored paper center position are deviated, according to the deviation amount In this configuration, the process of adjusting the interval between the recording timing and the cut timing is performed.

  In order to solve the above problems, according to the disclosed image recording apparatus, an image recording unit that records an image on a recording medium, and a cutter that cuts the recording medium at a predetermined position while transporting the recording medium An image recording apparatus comprising: a sheet edge detection unit that detects an end in a width direction of the recording medium; a sheet center position calculation unit that obtains a sheet center position from a detection result of the sheet edge detection unit; A storage unit that stores a calculation result of the sheet position center calculation unit; and a cutter unit that has a result of a shift between a sheet reference center position preset in the storage unit and the calculated and stored sheet center position. A cutter moving unit that moves the cutter unit in a direction perpendicular to the conveying direction and a control unit that controls the amount of movement of the cutter unit by the cutter moving unit according to the amount of deviation.

  Alternatively, according to the control method of the disclosed image recording apparatus, the image recording includes: an image recording unit that records an image on a recording medium; and a cutter unit that cuts the recording medium at a predetermined position while transporting the recording medium A method for controlling an apparatus, comprising: a paper edge detection process for detecting an end in a width direction of the recording medium; a paper center position calculation process for obtaining a paper center position from a detection result of the paper edge detection process; and the paper position When the result of the process of storing the calculation result of the center calculation unit in the storage unit and the sheet reference center position preset in the storage unit and the sheet center position calculated and stored are shifted, the cutter unit A cutter moving process for moving the cutter in the direction perpendicular to the conveying direction and a process for controlling the moving amount of the cutter unit by the cutter moving unit according to the deviation amount are performed.

  ADVANTAGE OF THE INVENTION According to this invention, the cutting position with respect to the recording image of the image recording apparatus for webs provided with the cutter apparatus can be controlled correctly.

1 is a configuration diagram of an image recording apparatus according to an embodiment. It is a figure explaining the structure of the cutter part used by this embodiment. It is a figure which shows the schematic arrangement | positioning of a conveyance path | route, and the recording medium after cut. It is a figure which shows the timing waveform regarding the drive control of a cutter part. It is a figure which shows the cutting condition when the center of the paper width direction of a web has shifted | deviated from the paper reference | standard center position. It is a figure which shows the calculation formula of distance (beta). It is a figure which shows a timing waveform when a center position shifts | deviates. It is a flowchart explaining the processing operation of this embodiment. It is a flowchart explaining the adjustment process of 1st Embodiment. It is a figure explaining the adjustment process of a recording start timing, and shows the timing waveform for keeping the distance of an image front-end | tip and a cutting position constant. It is a flowchart explaining the adjustment process of 2nd Embodiment. It is a figure which shows the timing waveform at the time of performing control of 2nd Embodiment. It is a flowchart explaining the adjustment process of 3rd Embodiment. It is a figure explaining the process of 3rd Embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a configuration diagram of an image recording apparatus according to the present embodiment. An image recording apparatus 1 shown in FIG. 1 is connected to a host apparatus 2 that is a host device of the image recording apparatus 1 such as a personal computer (PC). Image information is recorded on a continuous recording medium (web) 3 in accordance with a command from the host device 2. Here, the image information is information including image data to be recorded on the web 3, cutting information, and the like acquired from the higher-level device 2.

The web 3 is subjected to processing such as image recording and cutting to a predetermined length in the course of being conveyed by the conveyance system. Hereinafter, the operation of each part of the image recording apparatus 1 according to the present embodiment will be described along the process in which the web 3 is conveyed.
The ticket circulation medium storage unit 4 rotatably supports the web 3 wound in a roll shape. A mechanical or magnetic rotary brake is incorporated in the ticket-turning medium storage unit 4 to apply a predetermined tension to the web 3 by braking the pulled-out web 3.

The web 3 is provided with a vertical drag on the outer peripheral surface of the drum 6 by the back tension generated in the ticket circulation medium storage unit 4 and the conveying force provided by the conveying roller pair 5a, 5b driven by a motor (not shown). . And the web 3 is hold | maintained at the drum 6 with the frictional force between the web 3 and the drum 6, and is conveyed at a predetermined | prescribed speed. Further, the rotation axis of the drum 6 is provided with a conveyance information generation unit 7 including, for example, a rotary encoder or the like, and generates a periodic pulse as conveyance information corresponding to the conveyance distance of the web 3.
The image recording unit 8 is disposed at a position close to the outer diameter of the drum 6, and performs image recording, for example, by ejecting ink with a line-type inkjet head. The recording timing, which is the ink ejection timing, is controlled by the control unit 9 based on a cut timing signal described later and conveyance information generated by the conveyance information generation unit 7. Further, the control unit 9 has a storage unit 9a described later.

  In addition, when performing image recording on both surfaces of the web 3, the drum 6 and the image recording unit 8 are each provided with two sets, and each set of the image recording unit 8 records images on the front surface and the back surface of the web 3. Do.

  The web 3 is transported to the paper edge detection unit 10 after passing between the transport roller pairs 5a and 5b. The paper end detection unit 10 is configured by, for example, an optical reflection type line sensor. Further, the sheet edge detection unit 10a that detects the sheet edge on the left side with respect to the conveyance direction and the sheet edge detection unit 10b that detects the sheet edge on the right side with respect to the conveyance direction may be used. The paper edge detection unit 10 (10a, 10b) determines the presence or absence of the web 3 based on a predetermined threshold value of the amount of received light, and detects the paper edge.

  The web 3 is conveyed to the cutter unit 12 via the roller 11 after the paper end is detected by the paper end detection unit 10 (10a, 10b). For example, a spiral cutter is used as the cutter unit 12, and the web 3 is continuously cut in page units without stopping the conveyance of the web 3.

  The cut timing of the web 3 in the cutter unit 12 is based on the count value of the encoder signal output in synchronization with the web conveyance distance from the conveyance information generation unit 7. Thereby, the continuous web 3 is cut | disconnected to the sheet | seat 3a of predetermined length. By controlling in this way, it is possible to perform image recording and cutting operations without reducing the overall throughput of the image recording apparatus 1. A specific method for controlling the cutter unit 12 will be described later.

  The sheet 3a cut by the cutter unit 12 extends in the width direction of the sheet 3a and passes through the guides 13 provided on the front surface side and the back surface side so as to sandwich the sheet surface. In this way, the cut sheet 3 a is transferred to the discharge roller 14 and discharged to the discharge unit 15.

  FIG. 2 is a diagram showing a configuration of the cutter unit 12 used in the present embodiment, and the spiral cutter is used as described above. In this cutter, a blade 12b is attached to the surface of a cutter roller 12a which is a cylindrical roller. A blade having a length W is attached to the blade 12b with an inclination of a spiral angle θ2 with respect to the central axis of the cutter roller 12a. Here, the length W of the blade 12b needs to be W> Wmax / cos θ2, where Wmax is the length in the width direction of the maximum width web 3 to be used.

  FIG. 3 is a diagram showing a schematic arrangement of the conveyance path and the recording medium (sheet 3a) after cutting. An anvil roller 12d is provided facing the cutter roller 12a, and the web 3 is cut when passing through the gap between the cutter roller 12a and the anvil roller 12d. A cutting line 12e is a line in contact with the blade 12b and the anvil roller 12d while rotating, and indicates a place where the web 3 is cut. As shown in the figure, the cutter unit 12 is attached with an inclination θ1 with respect to the paper width direction. At this time, if the peripheral speed of the pair of transport rollers 5a and 5b is V1, and the peripheral speed of the tip of the blade 12b is V2, the web 3 is set in the transport direction by setting and controlling so that V1 / sin θ1 = V2 / sin θ2. On the other hand, it is possible to cut vertically.

  Further, if the spiral angle θ2 and the inclination angle θ1 of the cutter portion 12 are set to be equal, that is, the peripheral speed V1 of the pair of transport rollers 5a and 5b and the peripheral speed of the tip of the blade 12b are controlled to be equal to V2, the web 3 is transported. Cut perpendicular to the direction.

  Further, in FIG. 3, the image recording unit 8 is described as only one line for the sake of simplification, but the conveyance path length from the image recording unit 8 to the cutter unit 12 is L. Further, it is assumed that the image recording unit 8 continuously records the recorded image, and the distance between the leading end in the transport direction of the recorded image and the cut position is α.

  In the above setting, FIG. 4 is a diagram showing timing waveforms related to drive control of the cutter unit 12. In the figure, the rotational speed V of the cutter roller 12a, the cut timing signal a, and the recording timing signal b are shown. Hereinafter, the rotation speed of the cutter roller 12a is set to V. Vc at the time of cutting for cutting the web 3 perpendicular to the conveyance direction is Vc. This Vc is a value that varies depending on the conveyance speed of the web 3. Here, the cut timing signal a is generated, for example, according to a detection signal of a cutter reference position sensor 12c attached to the cutter roller 12a. Further, the rising timing (tl) of the cut timing signal a indicates the timing at which the center of the sheet is cut.

  The rotation speed V of the cutter roller 12a is controlled so that the period of the cut timing signal a (the time for which the cutter roller rotates once) is equal to the time (T5) for conveying the web 3 for the specified length to be cut. When V = Vc and the time for one rotation of the cutter roller is slower than T5, as shown in FIG. 4, the control is performed to increase the rotational speed V from Vc after cutting and return to Vc when cutting again. In this way, cut with the specified length to be cut. On the other hand, if the time for one rotation at V = Vc is earlier than T5, the specified speed to be cut is controlled by controlling the rotation speed V to be lowered from Vc after cutting and returning to Vc when cutting again. Cut with. By controlling in this way, the web 3 can be cut with a specified length.

  The recording timing signal b indicates the timing at which the image recording unit 8 performs recording processing on the web 3, and the rising timing (t3) of the recording timing signal b indicates the recording start timing. The recording timing signal b from t2 to t6 is a recording timing signal for one sheet, and the time (T4) from t2 to t6 is equal to the time (T5) for transporting the web 3 for a specified length to be cut.

  Further, the time (T2) from t2 to t3 is the time for transporting the leading edge margin α. Furthermore, if the interval between the sheet center cut timing t1 and the recording start timing t3 is T1, T1-T2 is equal to the time for transporting the remaining length when the transport path length L is divided by the specified cut length.

FIG. 5 shows a cutting situation when the center of the web 3 in the sheet width direction is shifted from the sheet reference center position 21 to the sheet center position 22. In this case, the timing for cutting the web 3 is delayed, and as a result, the distance α between the leading edge of the image and the cutting position becomes the distance β. Here, the distance β is obtained from the relationship shown in FIG.
It can be expressed by a calculation formula of β = α−r × tan θ1.
The timing waveform at this time is shown in FIG. That is, the actual cutting timing at the center of the paper is deviated from the rising timing (t3) of the recording timing signal b. For this reason, t2 in FIG. 4 is shifted to the position t2 ′ in FIG. 7, and as a result, the distance between the front end of the image and the cut position becomes β. Here, T2 ′ corresponds to the time for transporting the distance β.

FIG. 8 is a flowchart for explaining the processing of this embodiment.
First, the image recording apparatus 1 determines a job input from the host apparatus 2 (step (hereinafter referred to as S) 1). Specifically, it is determined whether image data to be recorded on the web 3 from the host device 2 or image information such as cutting information has been input, and if there is a job input (S1 is YES), the above-described transport roller pair 5a, The driving of 5b is started (S2), and the paper edge of the web 3 is detected by the paper edge detector 10 (10a, 10b) (S3).

  Next, the paper center position is calculated (S4). This processing is performed by the control unit 9 based on the detection signal from the paper edge detection unit 10 (10a, 10b). Then, the paper reference center position data stored in the storage unit 9a is read (S5), and it is determined whether the calculated paper center position is shifted from the paper reference center position stored in the storage unit 9a (S6).

  If the calculated paper center position is not shifted from the paper reference center position stored in the storage unit 9a (NO in S6), the process proceeds to the recording process (S8), but the sheet center position is shifted. (S6 is YES), adjustment processing is performed (S7). FIG. 9 is a flowchart for explaining this adjustment processing. In this process, first, the recording start timing with respect to the cutter origin signal is adjusted in accordance with the sheet deviation amount (S7-1).

  FIG. 10 is a diagram for explaining the adjustment process of the recording start timing, and shows a timing waveform for keeping the distance between the leading edge of the image and the cut position constant. For example, if it is found that the paper center position is shifted by r as shown in FIG. 5 based on the detection signal from the paper edge detection unit 10 (10a, 10b), the recording timing signal b is shifted by T6. This T6 is the time for transporting the aforementioned α-β. That is, assuming that the conveyance speed is Vf, T6 = (α−β) / Vf = rtan θ1 / Vf. Considering the rise timing (tl) of the cut timing signal a as a reference, the recording timing signal b is raised with a delay of T1 ′ (= T1 + T6).

Next, information on the recording start timing for the adjusted cutter origin signal is stored in the storage unit 9a (S7-2).
Next, when the cutting process (S9) is executed, the web 3 can be accurately cut at a position where the distance between the leading edge of the image and the cutting position is set to α.
Therefore, according to the present embodiment, even if the web conveyance position is shifted in the width direction, the cut position with respect to the recorded image can be accurately controlled.

Next, a second embodiment of the present invention will be described.
In this embodiment as well, the image recording apparatus 1 used in the first embodiment is used. For example, the image recording apparatus 1 is connected to a host apparatus 2 as a host device, and a web 3 wound in a roll shape is used. A ticket-turning medium storage unit 4 that is rotatably supported, a pair of conveyance rollers 5a and 5b driven by a motor (not shown), a drum 6, an image recording unit 8, a paper edge detection unit 10 (10a and 10b), and a cutter. Part 12.

  Also, the operation processing is basically performed according to the flowchart shown in FIG. 8, and the image recording apparatus 1 determines job input from the host apparatus 2 (S1), and drives the conveying roller pairs 5a and 5b. The process starts (S2), and the paper edge detection unit 10 (10a, 10b) detects the paper edge of the web 3 (S3). Thereafter, the paper center position is calculated (S4), and calculation processing is performed by the control unit 9 based on the detection signal from the paper edge detection unit 10 (10a, 10b), and the paper reference center stored in the storage unit 9a. If the position and the calculated center position of the paper are shifted (S6 is YES), an adjustment process is performed (S7).

  In the present embodiment, this adjustment process is different from that in the first embodiment. FIG. 11 is a flowchart for explaining this adjustment process. In the present embodiment, first, the operation of the cutter roller 12b is adjusted according to the amount of sheet deviation, and the cut timing is adjusted (S7-3).

  FIG. 12 is a diagram showing timing waveforms when the above control is performed. In the control of the first embodiment described above, the control for delaying the recording timing signal by T6 is performed based on the cut timing signal. In this embodiment, however, it is detected that the paper center position is shifted by r, for example. Then, the rise of the cut timing signal is advanced by T6. In order to advance the cut timing signal, it is necessary to adjust the rotation speed of the cutter roller 12a to increase the speed at which the cutter roller 12a makes one rotation.

  The time during which the rotational speed of the cutter roller 12a is rotating at a speed faster than the cutting speed Vc is increased by T7, and the speed Vc is shortened to increase the time for one rotation. By controlling in this way, the distance between the leading edge of the image and the cut position is adjusted to α by advancing the cut timing signal a by T6 with reference to the recording timing signal b.

Next, returning to the flowchart shown in FIG. 8, when the cutting process (S9) is executed, the web 3 can be accurately cut at a position where the distance between the image leading edge and the cutting position is set to α.
Therefore, according to this embodiment, even if the conveyance position of the web 3 is shifted in the width direction, the cut position with respect to the recorded image can be accurately controlled.

Next, a third embodiment of the present invention will be described.
In this embodiment, the image recording apparatus 1 used in the first and second embodiments is also used. For example, the image recording apparatus 1 is connected to a host apparatus 2 as a host device and wound in a roll shape. A ticket-turning medium storage unit 4 that rotatably supports the web 3, a pair of conveyance rollers 5a and 5b driven by a motor (not shown), a drum 6, an image recording unit 8, and a paper end detection unit 10 (10a and 10b). And a cutter unit 12.

  Also, the operation processing is basically controlled according to the flowchart shown in FIG. 8 described above, and the image recording apparatus 1 determines job input from the host apparatus 2 (S1), and drives the conveying roller pairs 5a and 5b. The process starts (S2), and the paper edge detection unit 10 (10a, 10b) detects the paper edge of the web 3 (S3). Then, a paper center position is calculated (S4), a calculation process is performed by the control unit 9 based on the detection signal from the paper edge detection unit 10 (10a, 10b), and a paper reference center position stored in the storage unit 9a. If the calculated paper center position is shifted (S6 is YES), an adjustment process is performed (S7).

  In the present embodiment, this adjustment process is different from the first and second embodiments described above. FIG. 13 is a flowchart for explaining the adjustment processing, and FIG. 14 is a diagram for explaining the adjustment processing. In the case of the present embodiment, instead of adjusting the cut timing signal a and the recording timing signal b, the cutter moving unit 19 is configured to be movable vertically in the conveying direction so that the cutter unit 12 follows the web 3. The information of a cutter movement position detection unit (not shown) is obtained, and the cutter unit 12 is moved by the shift amount r between the paper reference center 21 and the paper center 22 (S7-4). By controlling in this way, it is possible to cut at a distance α which is a predetermined amount from the front end of the image.

Next, returning to the flowchart shown in FIG. 8, when the cutting process (S9) is executed, the web 3 can be accurately cut at a position where the distance between the image leading edge and the cutting position is set to α.
Therefore, according to this embodiment, even if the web conveyance position is shifted in the width direction, the cut position with respect to the recorded image can be accurately controlled.

  Note that the present invention is not limited to the above-described embodiment, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, the present invention can make various inventions by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, in the present invention, some constituent elements may be deleted from all the constituent elements shown in the embodiments, and further different constituent elements of the respective embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 ... Image recording apparatus 2 ... High-order apparatus 3 ... Recording medium (web)
DESCRIPTION OF SYMBOLS 4 ... Ticket circulation medium storage part 5 ... Conveyance roller pair 6 ... Drum 7 ... Conveyance information generation part 8 ... Image recording part 9 ... Control part 9a ... Recording part 10 ... Paper edge detection unit 11 ··· roller 12 · · cutter unit 12a · · cutter roller 12b · · blade 12c · · cutter position reference sensor 12d · · anvil roller 12e · · cutting line 13 · · guide 14 · · discharge roller 15 ·・ Discharge unit 19 ・ ・ Cutter moving unit 21 ・ ・ Paper reference center 22 ・ ・ Paper center

Claims (8)

In an image recording apparatus comprising: an image recording unit that records an image on a recording medium; and a cutter unit that cuts the recording medium at a predetermined position while transporting the recording medium.
A sheet end detection unit for detecting a width direction end of the recording medium;
A paper center position calculation unit for obtaining a paper center position from the detection result of the paper edge detection unit;
A storage unit for storing a predetermined paper reference center position;
A control unit that adjusts an interval between a recording timing and a cut timing according to the amount of deviation when a result of the paper reference center position and the calculated and stored paper center position is different;
An image recording apparatus comprising:   The image recording apparatus according to claim 1, wherein when the interval between the recording timing and the cut timing is adjusted, control is performed to shift the recording timing with respect to the cut timing.   The image recording apparatus according to claim 1, wherein when the interval between the recording timing and the cut timing is adjusted, control is performed to shift the cut timing with respect to the recording timing. An image recording apparatus comprising: an image recording unit that records an image on a recording medium; and a cutter unit that cuts the recording medium at a predetermined position while conveying the recording medium,
A sheet end detection unit for detecting a width direction end of the recording medium;
A paper center position calculation unit for obtaining a paper center position from the detection result of the paper edge detection unit;
A storage unit for storing a predetermined paper reference center position;
A cutter moving unit that moves the cutter unit in a direction perpendicular to a conveyance direction when a result of the paper center center position and the calculated and stored paper center position is deviated;
In accordance with the amount of deviation, a control unit that controls the amount of movement of the cutter unit by the cutter moving unit;
An image recording apparatus comprising: In a control method of an image recording apparatus comprising: an image recording unit that records an image on a recording medium; and a cutter unit that cuts the recording medium at a predetermined position while transporting the recording medium.
A paper edge detection process for detecting a width direction edge of the recording medium;
A paper center position calculation process for obtaining a paper center position from the detection result of the paper edge detection process;
A process of adjusting the interval between the recording timing and the cut timing according to the amount of deviation when the result of the paper reference center position preset in the storage unit and the paper center position calculated and stored are different from each other; ,
A control method for an image recording apparatus.   6. The method of controlling an image recording apparatus according to claim 5, wherein when adjusting an interval between the recording timing and the cut timing, control is performed to shift the recording timing with respect to the cut timing.   6. The method of controlling an image recording apparatus according to claim 5, wherein when adjusting the interval between the recording timing and the cut timing, control is performed to shift the cut timing with respect to the recording timing. An image recording apparatus control method comprising: an image recording unit that records an image on a recording medium; and a cutter unit that cuts the recording medium at a predetermined position while transporting the recording medium,
A paper edge detection process for detecting a width direction edge of the recording medium;
A paper center position calculation process for obtaining a paper center position from the detection result of the paper edge detection process;
A cutter movement process for moving the cutter unit in a direction perpendicular to the conveyance direction when the result of the paper reference center position preset in the storage unit and the calculated and stored paper center position is shifted;
In accordance with the amount of deviation, a process for controlling the amount of movement of the cutter unit by the cutter moving unit;
A control method for an image recording apparatus.