Recording device and its control method, program, and storage medium

Abstract

To effectively suppress vibration due to driving of a circulation pump in a recording device.SOLUTION: A pump device for circulating internal liquid of a recording head for discharging liquid includes: drive means for circulating liquid; and control means for controlling operation of the drive means so as not to cause the recording head to resonate with the vibration caused by driving of the drive means on the basis of information relating to vibration of the recording head.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a technique for circulating ink in a recording apparatus. [Background technology]

[0002] In an inkjet recording device that forms an image by ejecting ink onto recording paper, a circulation pump is used to circulate the ink in order to prevent the ink from solidifying, settling, etc. In particular, an ink circulation pump that uses a piezoelectric element as a drive source may be used as the circulation pump.

[0003] For example, Patent Document 1 discloses a drive circuit capable of driving a plurality of piezoelectric elements. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2006-238564 A Summary of the Invention [Problem to be solved by the invention]

[0005] The technology disclosed in Patent Document 1 makes it possible to simplify the design by lowering the maximum voltage of not only the drive circuit for the piezoelectric element but also the entire circuit including the peripheral circuits, and by lowering the withstand voltage of the components used.

[0006] However, when a piezoelectric element is used to drive a circulation pump, vibrations may occur due to resonance with the surrounding mechanism in response to the drive frequency of the piezoelectric element. Therefore, there is a need for more appropriate control of the drive of the piezoelectric element.

[0007] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to effectively suppress vibrations caused by driving a circulation pump in a recording apparatus. [Means for solving the problem]

[0008] The pump device of the present invention is a pump device that circulates liquid within a recording head that ejects the liquid, and is characterized in that it comprises a driving means for circulating the liquid, and a control means that controls the operation of the driving means based on information regarding the vibration of the recording head so that the recording head does not resonate due to vibrations caused by the operation of the driving means. Effect of the Invention

[0009] According to the present invention, it is possible to effectively suppress vibrations caused by driving the circulation pump in a recording apparatus. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view of an inkjet printing apparatus according to a first embodiment of the present invention. [Diagram 2] FIG. 4 is a block diagram showing a control configuration of a circulation pump in the printing apparatus. [Diagram 3] FIG. 2 is a schematic diagram showing the configuration of the periphery of a circulation pump. [Figure 4] FIG. 2 is a block diagram showing the configuration of a control system included in the printing apparatus. [Diagram 5] 4 is a flowchart showing the driving operation of a circulation pump. [Figure 6] 5A and 5B are diagrams showing examples of ink landing when the print head is vibrated. [Figure 7] 6 is a diagram showing vibrations of a recording head when a circulation pump is driven. [Figure 8] 10 is a flowchart showing the driving operation of a circulation pump in a second embodiment. [Figure 9] 5A and 5B are diagrams showing vibrations of the recording head in the forward and backward directions. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the embodiments will be described in detail with reference to the attached drawings. Note that the following embodiments do not limit the invention according to the claims. Although the embodiments describe a number of features, not all of these features are essential to the invention, and the features may be combined in any manner. Furthermore, in the attached drawings, the same reference numbers are used for the same or similar configurations, and duplicated descriptions are omitted.

[0012] In the following description of the embodiment, "recording" includes not only the formation of significant information such as characters and figures, but also the formation of images, designs, patterns, etc. on a sheet. In the present embodiment, a roll sheet is assumed as the sheet, but cut paper, cloth, plastic film, etc. may also be used. Furthermore, "ink" should be broadly interpreted and refers to a liquid that can be applied to a sheet to form images, designs, patterns, etc., or to process the sheet, or to be used for ink processing.

[0013] (First embodiment) <Configuration of Inkjet Printing Apparatus> FIG. 1 is a perspective view of an inkjet printing apparatus 101 (hereinafter, printing apparatus 101) according to a first embodiment of the present invention.

[0014] The recording device 101 includes an operation panel 102 for displaying various recording information and setting results, a basket 103 for loading cut recording media on which images have been recorded, and the like. The operation panel 102 is an interface module that accepts various operations from a user. The user can use various switches and the like provided on the operation panel 102 to perform various settings for the recording device 101. The various settings for the recording device 101 include, for example, settings for the size and type of recording media, the drive frequency of a circulating pump 202 of a recording head 201 (see FIG. 3), and the like.

[0015] FIG. 2 is a block diagram showing a control configuration of the circulation pump 202 in the printhead of the printing apparatus 101. As shown in FIG.

[0016] 2, various setting information and the like based on user operations on operation panel 102 and the like are input to CPU 301. The input information is stored in memory 312 (see FIG. 4). CPU 301 can read out the information stored in memory 312 as needed and execute various processes based on the read out information. That is, CPU 301 includes a processing unit that executes various processes.

[0017] The print head 201 is capable of ejecting ink of multiple colors, and in this embodiment, ink of four colors: C (cyan), M (magenta), Y (yellow), and B (black). The print head 201 has circulation pumps 202a to 202c for each color of ink (four circulation pumps in total). In other words, the print head 201 has multiple circulation pumps. The circulation pumps 202a to 202c are used to circulate the ink of each color. The multiple circulation pumps 202a to 202c are driven by multiple pump drive circuits 303a to 303d, respectively.

[0018] The CPU 301 controls the pump driving circuits 303a-303d using control signals 304a-304d via the pump control unit 302. Furthermore, the pump driving circuits 303a-303d drive the circulation pumps 202a-202d using control signals 305a-305d. In the following description, one of the circulation pumps 202a-202d may be represented as the circulation pump 202. Similarly, the pump driving circuits 303a-303d, the control signals 304a-304d, and the control signals 305a-305d may be represented as the pump driving circuit 303, the control signal 304, and the control signal 305, respectively.

[0019] Furthermore, the CPU 301 controls the acceleration sensor 309 via a sensor control unit 310. The acceleration sensor 309 is disposed in the print head 201, and is capable of detecting the vibration frequency and vibration acceleration in each of the X, Y and Z directions shown in FIG.

[0020] FIG. 3 is a schematic diagram showing the configuration of the periphery of the circulation pump 202. As shown in FIG.

[0021] The circulation pump 202 is provided with a piezoelectric element 203 for converting electrical energy into mechanical energy. When a voltage is applied between the terminals of the piezoelectric element 203, a distortion proportional to the applied voltage occurs due to the electrostrictive effect. By utilizing this distortion, a diaphragm (not shown) of the circulation pump 202 is vibrated, thereby circulating the ink in the recording head 201.

[0022] FIG. 4 is a block diagram showing the configuration of a control system provided in the recording device 101. As shown in FIG.

[0023] The CPU 301 controls each part of the recording device 101 according to a control program recorded in the memory 312. The CPU 301 controls a carriage drive motor 316 via a motor control unit 315. The carriage drive motor 316 rotates a carriage belt (not shown) to move a carriage (not shown) and the recording head 201 mounted thereon.

[0024] The CPU 301 also controls the ink ejection operation of the print head 201 via a head control unit 314. The CPU 301 also accepts user operations from the operation panel 102 via an input / output interface 311, and receives print data and the like input from a USB port 313.

[0025] The relationship between the CPU 301, the pump control unit 302, the pump drive circuit 303, the circulation pump 202, the acceleration sensor 309, and the sensor control unit 310 is as described with reference to FIG.

[0026] <Circulation pump control> The control of the circulation pump will be described with reference to FIGS.

[0027] The printhead 201 is equipped with a plurality of circulation pumps 202 (202a to 202d) for circulating the ink inside the printhead 201. The driving voltage 305 applied to the piezoelectric element 203 is generally a square wave or a sine wave.

[0028] The CPU 301 gives a command to the pump control unit 302 regarding the drive of the circulation pump 202. Examples of the command contents include start of drive, end of drive, and drive frequency. Examples of communication means for giving the command include an I2C (Inter-Integrated Circuit) and an SPI (Cerial Peripheral Interface). The pump control unit 302 gives a control signal 304 corresponding to the command to the pump drive circuit 303. Examples of the pump control unit 302 include an FPGA (Field Programmable Gate Array) and a microcomputer. Examples of the control signal 304 include a rectangular wave and a sine wave. A drive voltage 305 corresponding to the control signal 304 is applied from the pump drive circuit 303 to the circulation pump 202.

[0029] <Basic operation of the pump drive circuit> FIG. 5 is a flowchart showing the driving operation of the circulation pump 202.

[0030] Since the print head 201 is equipped with a circulation pump 202, when a piezoelectric element 203 in the circulation pump 202 is driven, the print head 201 vibrates. Figures 6(a) and 6(b) are schematic diagrams showing the landing positions of droplets ejected from the print head 201 when the vibration is small and when the vibration is large. When the vibration is small, there is no disturbance in the landing positions of the ejected droplets as shown in Figure 6(a). In contrast, when the vibration is large, there is disturbance in the landing positions of the ejected droplets as shown in Figure 6(b), resulting in image unevenness.

[0031] In order to suppress this disturbance in the landing positions, the following operation is carried out in this embodiment.

[0032] First, in step S501, the CPU 301 uses the acceleration sensor 309 to measure the vibration of the print head 201. Specifically, when driving the circulation pump 202, the CPU 301 issues a command to drive the circulation pump 202 to the pump control unit 302. Since the print head 201 also vibrates due to its own ink ejection operation, the acceleration sensor 309 measures the vibration frequency and vibration acceleration in the X, Y and Z directions of the print head 201 including its peripheral mechanisms when the circulation pump 202 is not driven. Then, the CPU 301 stores the measurement results in the memory 312.

[0033] In step S502, CPU 301 sets the drive frequency of circulation pump 202 in accordance with the vibration frequency and vibration acceleration of print head 201 measured by acceleration sensor 309 in step S501. The setting is performed so that the natural frequency (resonance frequency) of print head 201 including the peripheral mechanisms stored in memory 312 does not match the drive frequency when circulation pump 202 is driven. For example, Fig. 7 is a diagram showing the vibration of print head 201 when circulation pump 202 is driven, with the maximum acceleration of vibration on the vertical axis and frequency on the horizontal axis. It can be seen from this diagram that the vibration at 50 Hz is large.

[0034] The drive frequency of the circulation pump 202 is set within a predetermined frequency range appropriate for circulating the ink. In this case, the drive frequency of the circulation pump is set so that the natural frequency (resonance frequency) of the print head 201 including the peripheral mechanisms does not match the drive frequency of the circulation pump 202. For example, in the example of Fig. 7, since the vibration acceleration of the peripheral mechanisms of the print head 201 has a peak at 50 Hz, the drive frequency of the circulation pump 202 is set to 30 Hz, 40 Hz, 60 Hz, 70 Hz, etc., avoiding 50 Hz.

[0035] In step S503, the CPU 301 drives the circulation pump 202. In this case, the drive frequency of the circulation pump 202 is set to 30 Hz, 40 Hz, 60 Hz, 70 Hz, etc., as described above.

[0036] In step S504, CPU 301 determines whether a predetermined time has elapsed since starting to drive circulation pump 202 in order to drive circulation pump 202 for a predetermined time. The predetermined time is set in advance by an administrator of recording device 101 through operation panel 102. If it is determined in step S504 that the predetermined time has elapsed, CPU 301 proceeds to the process of step S505, where it continues to drive circulation pump 202 until the predetermined time has elapsed.

[0037] In step S505, the CPU 301 measures the vibration of the print head 201. As in step S501, the acceleration sensor 309 in the print head 201 is used to measure the vibration frequency and vibration acceleration of the print head 201.

[0038] In step S506, the CPU 301 determines whether the vibration intensity of the print head 201 measured in step S505 is equal to or less than a reference value. In this embodiment, the vibration intensity is expressed by the maximum acceleration of the vibration. However, the vibration intensity can be expressed not only by the maximum acceleration of the vibration, but also by other values ​​such as the maximum amplitude.

[0039] As an example, the reference value when the resonance frequency of the recording head 201 including the peripheral mechanisms is 50 Hz is shown by the dotted line in Fig. 5. In Fig. 5, the maximum acceleration of the vibration of the recording head 201 is 30 [m / s 2 ] or less, the standard value of the maximum vibration acceleration is set to, for example, 35 [m / s 2 At the resonance point of 50Hz, the maximum acceleration of the vibration is set to this reference value of 35[m / s 2 ], the drive frequency of the circulation pump 202 is set to 30 Hz, 40 Hz, 60 Hz, 70 Hz, etc., avoiding the range of about ±20 Hz of 50 Hz as described above.

[0040] If the vibration strength exceeds the reference value in step S506, CPU 301 proceeds to step S507, and if the vibration strength does not exceed the reference value, ends this flow. When this flow ends and the vibration strength of print head 201 is suppressed to the reference value or less, recording device 101 becomes ready for printing.

[0041] In step S507, CPU 301 changes the drive frequency of circulation pump 202. In other words, if the vibration intensity measured in step S505 is greater than a reference value that is the vibration tolerance range, the drive frequency of circulation pump 202 is set again. As already described, for example, if the resonance frequency of print head 201 including peripheral mechanisms is 50 Hz, the drive frequency of circulation pump 202 is determined to be 40 Hz, 60 Hz, 70 Hz, 80 Hz, etc. This is repeated until the measured vibration intensity falls below the reference value that is the vibration tolerance range. If the vibration intensity is greater than the reference value three times in a row, CPU 301 determines that an error has occurred.

[0042] As described above, by setting the drive frequency of the ink circulation pump 202 so as not to overlap with the resonance frequency of the print head 201 including the peripheral mechanisms, it is possible to drive the circulation pump 202 with vibrations kept to a minimum. This makes it possible to provide a printing device that can print with stable image quality.

[0043] Second Embodiment 8 is a flowchart showing the drive operation of the circulating pump 202 in the second embodiment of the present invention. In the second embodiment, the configuration other than the operation of this flowchart is similar to that of the first embodiment.

[0044] In step S801, the CPU 301 reads data indicating the relationship between the vibration frequency and vibration intensity of the print head 201 including its peripheral mechanisms from the memory 312. In this embodiment, the relationship between the vibration frequency and vibration intensity of the print head 201 including its peripheral mechanisms is measured in advance and stored in the memory 312. The data on the resonance frequency and vibration intensity is read out by reading out the most recent data among the stored data. When reading out data for the second or subsequent times, the data with the next most recent date after the data read out the first time is read out.

[0045] In step S802, the CPU 301 sets the drive frequency of the circulation pump 202 in accordance with the data of the vibration frequency and vibration intensity read out in step S801. The setting method is the same as in step S502 in FIG.

[0046] In step S803, CPU 301 causes print head 201 to print a test pattern while driving circulation pump 202 at the drive frequency set in step S802. The test pattern is image data that is stored in CPU 301 in advance, and is image data that makes it easy to determine the ink landing state caused by vibration of print head 201.

[0047] In step S804, CPU 301 causes the scanner to read the product on which the test pattern is printed, and determines whether image unevenness is within an acceptable range. Image unevenness detection is performed as follows. The read data (pixel values ​​of each pixel of the imaging element used for reading) is divided into N blocks in the printing direction, and the RGB values ​​of each of the N blocks are calculated. An evaluation value is calculated, which is the difference between the maximum and minimum values ​​of the N RGB values. The acceptable range of evaluation values ​​varies depending on the administrator, and the acceptable range of image unevenness is determined by the administrator. If CPU 301 finds that the evaluation value falls within the criteria determined by the administrator, the operation of this flow ends. Then, printing is started. If the evaluation value does not fall within the criteria, CPU 301 returns to step S801, reads out the next most recent data among the data stored in memory 312, and repeats the operations of S802 to S804.

[0048] (Third embodiment) In the third embodiment, the process of step S502 in FIG. 5 is different from that of the first embodiment.

[0049] In this embodiment, the CPU 301 can change not only the drive frequency of the circulation pump 202 but also the phase (it is possible to change at least one of the frequency and the phase). By changing not only the frequency component but also the phase, the print head 201 and the circulation pump 202 vibrate so as to suppress each other's vibration, making it possible to suppress vibration of the print head 201 including the peripheral mechanisms. Also, by switching the print head 201 on and off while it is being driven, it is possible to suppress vibration caused by the circulation pump 202 and reduce power consumption.

[0050] (Fourth embodiment) In the fourth embodiment, the process of step S502 in FIG. 5 is different from that of the first embodiment.

[0051] The vibration of the print head 201 becomes larger when the carriage is accelerating compared to when the carriage is moving at a constant speed. This is because when the carriage is accelerating (during acceleration), acceleration, that is, force, is applied to the print head 201. Also, since the settling speed of the ink differs depending on the color (or type of ink), the driving states of the four circulation pumps 202a to 202d for each color (type of ink) also differ.

[0052] For example, if the settling speed of ink A is 1, then ink B settles at twice the speed, ink C at three times the speed, and ink D at once the speed. In this case, it is necessary to drive the circulation pumps 202 for inks B and C, which tend to settle more easily, with priority. Therefore, in the acceleration region where the vibration of the print head 201 is large, only the circulation pumps 202 (part of the multiple circulation pumps) for inks B and C are driven, and the circulation pumps 202 for inks A and D are not driven, thereby making it possible to suppress the vibration of the print head 201 in the acceleration region.

[0053] In this way, in the constant speed region, all of the circulation pumps 202 are driven, whereas in the acceleration region, only the circulation pumps 202 for inks B and C are driven. This method makes it possible to suppress vibrations not only of the print head 201 but also of the entire peripheral mechanism.

[0054] Fifth embodiment In the fifth embodiment, the process of step S502 in FIG. 5 is different from that of the first embodiment.

[0055] The print head 201 is scanned back and forth, and the vibration of the print head 201 may differ depending on the scanning direction of this back and forth scanning. FIG. 9 is a diagram showing the vibration of the print head 201 in the forward and backward directions of the print head 201 (carriage), with the maximum acceleration of vibration on the vertical axis and the frequency on the horizontal axis. The frequency at which the vibration becomes large and the strength of the vibration (maximum acceleration of vibration) change between the forward direction (forward path) and the backward direction (return path). Therefore, by changing the frequency at which the circulation pump 202 is driven in the forward and backward directions, it is possible to suppress the vibration of the print head 201 including the peripheral mechanisms. Note that it is not the frequency that is changed, but the phase or the control waveform may also be changed.

[0056] Sixth embodiment In the sixth embodiment, the process of step S502 in FIG. 5 is different from that of the first embodiment.

[0057] For example, in the fourth embodiment, consider a case where the circulation pumps 202 for inks B and C are driven with priority, and the circulation pumps for inks A and D may or may not be driven. In this case, a drive method is selected that reduces the current consumption of the recording device 101 without driving the circulation pumps for inks A and D. This makes it possible to reduce the power consumption of the recording device 101.

[0058] 2, the number of control signals 304 from the pump control unit 302 to the pump drive circuit 303 is not limited to four. The number of pump drive circuits 303 controlled by the pump control unit 302 is not limited to four. Therefore, a single pump control unit 302 may control a plurality of pump drive circuits 303. A single pump drive circuit 303 may drive a plurality of circulation pumps 202 or piezoelectric elements 203 of the circulation pumps 202.

[0059] The disclosure of this specification includes the following recording device, method, program, and storage medium.

[0060] (Item 1) A pump device for circulating liquid in a recording head that ejects the liquid, comprising: A drive means for circulating the liquid; a control means for controlling the operation of the driving means based on information regarding the vibration of the recording head so that the recording head does not resonate due to vibration caused by the operation of the driving means; A pump device comprising:

[0061] (Item 2) 2. The pump device according to item 1, wherein the control means controls at least one of a frequency and a phase of the operation of the drive means.

[0062] (Item 3) 3. The pump device according to item 2, wherein the control means makes the operating frequency of the drive means different from a resonance frequency of the recording head.

[0063] (Item 4) 3. The pump device according to item 2, wherein the control means makes the phase of the operation of the drive means different from the phase of the vibration of the recording head.

[0064] (Item 5) 5. The pump device according to any one of items 1 to 4, wherein the information relating to vibration of the recording head is information relating to vibration of the recording head including a peripheral mechanism of the recording head.

[0065] (Item 6) 6. The pump device according to any one of items 1 to 5, wherein the information regarding the vibration of the recording head is information obtained by measuring the vibration of the recording head.

[0066] (Item 7) 7. The pump device according to item 6, further comprising a measuring means for measuring vibration of the recording head.

[0067] (Item 8) The pump device described in item 7, characterized in that the measurement means measures the vibration of the recording head while the drive means is operating, and when the intensity of the measured vibration exceeds a reference value, changes at least one of the frequency and phase of the operation of the drive means.

[0068] (Item 9) 6. The pump device according to any one of items 1 to 5, wherein the information regarding the vibration of the recording head is information that is obtained by measuring the vibration of the recording head in advance and storing the information.

[0069] (Item 10) 10. The pump device according to item 9, further comprising a storage means for storing information regarding the vibration of the recording head.

[0070] (Item 11) 11. The pump device according to any one of items 1 to 10, further comprising a plurality of the driving means, and wherein the control means operates only a portion of the plurality of the driving means during acceleration of the recording head.

[0071] (Item 12) The pump device described in any one of items 1 to 11, characterized in that the recording head is scanned back and forth, and the control means changes at least one of the frequency and phase at which the driving means operates between the forward and return paths of the recording head.

[0072] (Item 13) A pump device according to any one of items 1 to 12, The recording head; a carriage for causing the recording head to scan back and forth; A recording device comprising:

[0073] (Item 14) A method for controlling a pump device having a driving means for circulating a liquid in a recording head that ejects the liquid, comprising the steps of: 2. A method for controlling a pump device, comprising the step of: controlling operation of said driving means based on information regarding vibration of said recording head so that said recording head does not resonate due to vibration caused by operation of said driving means.

[0074] (Item 15) Item 15. A program for causing a computer to execute the control method according to item 14.

[0075] (Item 16) A computer-readable storage medium storing a program for causing a computer to execute the control method according to item 14.

[0076] (Other embodiments) The present invention can also be realized by a process in which a program for realizing one or more functions of the above-mentioned embodiments is supplied to a system or device via a network or a storage medium, and one or more processors in a computer of the system or device read and execute the program. The present invention can also be realized by a circuit (e.g., ASIC) for realizing one or more functions.

[0077] The invention is not limited to the above-described embodiments, and various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, the following claims are appended to apprise the public of the scope of the invention. [Explanation of symbols]

[0078] 101: recording device, 102: operation panel, 201: recording head, 202: circulation pump, 203: piezoelectric element, 301: CPU, 302: pump control unit, 303: pump drive circuit, 309: acceleration sensor, 310: sensor control unit, 314: head control unit, 316: carriage drive motor

Claims

1. A recording head that ejects ink, A pump for circulating the ink in the recording head, A sensor that detects information regarding the vibration of the recording head, A control means for controlling the operation of the pump based on the vibration information, A recording device characterized by comprising the following features.

2. The recording device according to claim 1, characterized in that the sensor is an acceleration sensor that detects the vibration acceleration of the recording head.

3. The recording device according to claim 1, characterized in that the pump has a piezoelectric element as a drive source.

4. The recording device according to claim 1, wherein the recording head is configured to eject ink of multiple colors, and the pumps are provided in multiple quantities corresponding to the ink of multiple colors.

5. The recording device according to claim 1, characterized in that the control means controls at least one of the frequency and phase of the operation of the pump.

6. The recording apparatus according to claim 5, characterized in that the control means causes the operating frequency of the pump to be different from the resonant frequency of the recording head.

7. The recording apparatus according to claim 5, characterized in that the control means causes the phase of the operation of the pump to be different from the phase of the vibration of the recording head.

8. The recording apparatus according to claim 1, characterized in that the information relating to the vibration of the recording head includes information relating to the vibration of the recording head, including the peripheral mechanism of the recording head.

9. The recording apparatus according to claim 1, characterized in that the information relating to the vibration of the recording head is information obtained by measuring the vibration of the recording head.

10. The recording apparatus according to claim 1, characterized in that the sensor measures the vibration of the recording head while the pump is operating, and changes at least one of the frequency and phase of the pump's operation if the measured vibration intensity exceeds a reference value.

11. The recording apparatus according to claim 1, characterized in that the information relating to the vibration of the recording head is information stored by measuring the vibration of the recording head in advance.

12. The recording device according to claim 1, further comprising a storage means for storing information relating to the vibration of the recording head.

13. The recording apparatus according to claim 4, characterized in that the control means operates only a portion of the plurality of pumps while the recording head is being accelerated.

14. The recording apparatus according to claim 1, wherein the recording head is scanned back and forth, and the control means changes at least one of the frequency and phase of operating the pump in the forward and return paths of the recording head.

15. A method for controlling a recording device comprising: a recording head for ejecting ink; a pump for circulating the ink within the recording head; and a sensor for detecting information relating to vibration of the recording head, A control method for a recording device, characterized by having a control step that controls the operation of the pump based on the information regarding the vibration.

16. A program for causing a computer to execute the control method described in claim 15.

17. A computer-readable storage medium storing a program for causing a computer to execute the control method described in claim 15.

Images