CN108016149B - Printing apparatus and method for adjusting printing apparatus - Google Patents
Printing apparatus and method for adjusting printing apparatus Download PDFInfo
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- CN108016149B CN108016149B CN201711037107.3A CN201711037107A CN108016149B CN 108016149 B CN108016149 B CN 108016149B CN 201711037107 A CN201711037107 A CN 201711037107A CN 108016149 B CN108016149 B CN 108016149B
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- Prior art keywords
- conveyor belt
- printing
- displacement
- transport
- belt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
- B41J15/048—Conveyor belts or like feeding devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/007—Conveyor belts or like feeding devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/008—Controlling printhead for accurately positioning print image on printing material, e.g. with the intention to control the width of margins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
Abstract
Provided are a printing device and a method for adjusting the printing device, which can correct the offset of the landing position of ink drops in the direction perpendicular to the conveying direction of a printing medium with higher precision. A printing device (100) is provided with: a conveyor belt (23) that conveys the fabric (1) in a conveying direction; a printing unit (40) that applies ink droplets to the fabric (1) being conveyed and performs printing; and a control unit (80) that controls the position at which the ink droplets are applied, wherein the device control unit (80) corrects the position at which the ink droplets are applied in a direction intersecting the transport direction on the basis of displacement characteristic data that indicates the amount of displacement of the transport belt (23) in the direction intersecting the transport direction, which is caused by the movement of the transport belt (23) in the transport direction.
Description
Technical Field
The present invention relates to a printing apparatus that prints on a printing medium conveyed on a conveyor belt and a method of adjusting the printing apparatus.
Background
Conventionally, as a printing apparatus, for example, an ink jet printer that performs printing on a printing medium conveyed by a conveyor belt, such as a textile printing apparatus that performs printing on a long cloth, is known.
In such a printing apparatus, a technique for suppressing a decrease in print quality due to a conveyance accuracy (error) of a print medium on a conveyance belt has been studied. For example, patent document 1 describes a printing apparatus (image forming apparatus) including: a conveyor belt that conveys a print medium (print sheet) in a conveyance direction (sub-scanning direction); a head configured to extend the nozzles in a main scanning direction perpendicular to the transport direction; and a correction unit that corrects the ejection timing of the ink droplets ejected from the head in accordance with the landing position shift of the ink droplets accompanying the rotation of the conveyor belt. Further, for example, patent document 2 describes a printing apparatus including: a meandering detection unit that detects meandering of a conveyed printing medium (recording medium); and a control unit that executes a meandering removal process for removing the detected meandering.
However, the printing apparatus described in patent document 1 has the following problems: although it is possible to correct the landing position deviation of the ink droplets in the conveying direction (sub-scanning direction) accompanying the conveyance, it is not possible to correct the landing position deviation of the ink droplets in the main scanning direction perpendicular to the conveying direction.
In the printing apparatus described in patent document 2, although the occurrence of wrinkles in the print medium can be suppressed by detecting meandering of the print medium and eliminating the meandering, there is a room for improvement in, for example, correction of a deviation in landing positions of ink droplets in a main scanning direction perpendicular to a transport direction (sub-scanning direction), and there is a possibility that sufficient correction accuracy cannot be obtained with respect to accuracy of sizes of the ink droplets and pitches thereof.
Prior art documents
Patent document
Patent document 1: japanese patent laid-open No. 2014-69322
Patent document 2: japanese patent laid-open No. 2015-187035.
Disclosure of Invention
The present invention has been made to solve at least part of the above problems, and can be implemented as the following application examples and embodiments.
Application example 1a printing apparatus according to the application example includes: a conveyor belt that conveys a printing medium in a conveying direction; a printing unit that performs printing by applying ink droplets to the transported print medium; and a control unit that controls a position to which the ink droplet is applied, wherein the control unit corrects the ink droplet application position in a direction intersecting the transport direction based on displacement characteristic data indicating a displacement amount of the transport belt in the direction intersecting the transport direction accompanying movement of the transport belt in the transport direction.
According to the present application example, the control section corrects the position to which the ink droplet is applied in the direction intersecting the transport direction, based on the displacement characteristic data indicating the amount of displacement of the transport belt in the direction intersecting the transport direction accompanying the movement of the transport belt in the transport direction. That is, the positions of ink droplets given to the printing medium which is conveyed by the conveyor belt and whose positions are displaced in accordance with the displacement of the conveyor belt are corrected based on displacement characteristic data indicating the displacement amount of the conveyor belt in the direction intersecting the conveying direction in accordance with the movement of the conveyor belt in the conveying direction. As a result, the displacement of the conveying belt in the direction intersecting the conveying direction can be corrected with higher accuracy, and the degradation of the print quality due to the displacement can be more effectively suppressed.
Application example 2 a printing apparatus according to the above application example, wherein: the control unit specifies a reference position of the printing in a direction intersecting the transport direction based on the displacement characteristic data.
According to the present application example, the control unit specifies the printing reference position in the direction intersecting the transport direction based on the displacement characteristic data indicating the amount of displacement of the transport belt in the direction intersecting the transport direction accompanying the movement of the transport belt in the transport direction. As a result, the printing medium, which is conveyed by the conveyor belt and whose position is displaced as the conveyor belt is displaced, can be printed at a more appropriate position.
Application example 3a printing apparatus according to the application example, comprising: the displacement characteristic data includes data of at least one cycle in which the displacement amount changes, and the control section corrects the position to which the ink droplet is applied in a direction intersecting the transport direction at the rotational position, based on the displacement amount obtained in accordance with the rotational position of the transport belt in the one cycle.
According to the present application example, the displacement characteristic data includes data of at least one cycle in which the amount of displacement changes, and the displacement characteristic data indicates the amount of displacement of the conveyor belt in the direction intersecting the conveying direction as the conveyor belt moves in the conveying direction. Further, the control section corrects the position of the ink droplet application in the direction intersecting the transport direction at the rotational position based on the displacement amount obtained corresponding to the rotational position of the transport belt in one cycle. That is, the positions of ink droplets applied to the printing medium conveyed by the conveyor belt and displaced according to the displacement of the conveyor belt are corrected based on displacement amount data (displacement characteristic data) corresponding to the moving position of the conveyor belt in the conveying direction. As a result, the displacement of the conveying belt in the direction intersecting the conveying direction can be corrected with higher accuracy, and the degradation of the print quality can be suppressed.
Application example 4 a printing apparatus according to the application example, comprising: the image processing unit is configured to perform image recognition on the predetermined pattern printed by the printing unit in order to measure the displacement amount, and acquire the displacement characteristic data by performing image processing.
According to this application example, the printing apparatus includes an image processing unit that performs image recognition on a predetermined pattern printed by the printing unit and acquires displacement characteristic data by image processing in order to measure a displacement amount of the conveyor belt in a direction intersecting the conveying direction in accordance with the movement of the conveyor belt in the conveying direction. Therefore, for example, the user of the printing apparatus can update the displacement characteristic data to cope with the latest state of the printing apparatus. As a result, the displacement of the conveying belt in the direction intersecting the conveying direction can be corrected with higher accuracy, and the degradation of the print quality can be suppressed.
Application example 5 the method of adjusting a printing apparatus according to the application example, the printing apparatus including: a conveyor belt that conveys a printing medium in a conveying direction; and a printing unit configured to perform printing by applying ink droplets to the transported print medium, wherein the method of adjusting the printing apparatus includes: a step of acquiring displacement characteristic data indicating a displacement amount of the conveyor belt in a direction intersecting the conveying direction accompanying movement of the conveyor belt in the conveying direction; and determining a rotational position of the transport belt, and adjusting the printing device at the rotational position of the transport belt based on the displacement characteristic data, wherein a position to which the ink droplet is applied in a direction intersecting the transport direction is adjusted at the determined rotational position.
The method for adjusting a printing apparatus according to the present application example includes the steps of: a step of acquiring displacement characteristic data indicating a displacement amount of the conveyor belt in a direction intersecting the conveying direction accompanying movement of the conveyor belt in the conveying direction; and determining a rotational position of the conveyor belt at which the printing apparatus is adjusted based on the acquired displacement characteristic data. Further, in the rotational position determined here, the position in the direction intersecting the transport direction at which the ink droplets are given is adjusted. That is, the position of the ink droplet application in the direction intersecting the transport direction is adjusted at the rotational position determined based on the displacement characteristic data indicating the amount of displacement of the transport belt in the direction intersecting the transport direction accompanying the movement of the transport belt in the transport direction. Therefore, the ink droplet application position can be adjusted at a position where the displacement of the conveyor belt in the direction intersecting the conveying direction is more stable, and more appropriate adjustment can be performed.
Application example 6 a method of adjusting a printing apparatus according to the above application example, comprising: and determining a center value of a width of the conveyor belt that is displaced in a direction intersecting the conveying direction, based on the displacement characteristic data, and determining a rotational position of the conveyor belt when the conveyor belt is located at the center value as a rotational position of the conveyor belt that adjusts the printing device.
According to the present application example, since the center value of the width of the conveyor belt that is displaced in the direction intersecting the conveying direction can be adjusted at the rotational position of the conveyor belt when the conveyor belt is at the center value, the position to which the ink droplets are applied in the direction intersecting the conveying direction can be adjusted, and therefore, the position to which the ink droplets are applied can be adjusted at the position where the displacement of the conveyor belt in the direction intersecting the conveying direction is more stable, and more appropriate adjustment can be performed.
Application example 7 the method of adjusting a printing apparatus according to the application example, wherein: and determining a most frequent position where the conveyor belt is most frequently located in a direction intersecting the conveying direction from the displacement characteristic data, and determining a rotational position of the conveyor belt when the conveyor belt is located at the most frequent position as a rotational position of the conveyor belt for adjusting the printing device.
According to the present application example, the position to which ink droplets are applied in the direction intersecting the transport direction can be adjusted at the most frequent position in which the transport belt is most often located in the direction intersecting the transport direction, and thus, more efficient adjustment with a higher time contribution rate reflecting the adjustment result can be performed.
Drawings
Fig. 1 is a schematic diagram showing a printing apparatus of a "printing apparatus" according to an embodiment.
Fig. 2 is a block diagram illustrating functions of the apparatus control unit and the image processing apparatus.
Fig. 3 is an explanatory diagram of basic functions of the printer driver.
Fig. 4 is a schematic diagram showing an example of the arrangement of the nozzles as viewed from the bottom surface of the head.
Fig. 5 is an explanatory diagram showing an example of a predetermined pattern for obtaining the displacement amount.
Fig. 6 is a graph showing an example of plotting displacement characteristic data of the conveyor belt.
Fig. 7 is a graph showing an example of plotting two cycles of the measured displacement characteristic data.
Description of the symbols
1 … fabric, 10 … fabric supply section, 11 … shaft section, 12 … bearing section, 20 … fabric conveying section, 21 … conveying roller, 22 … tension roller, 23 … conveying belt, 23a … supporting surface, 23b … inner peripheral surface, 24 … belt rotating roller, 25 … belt driving roller, 26 … conveying roller, 27 … drying unit, 28 … conveying roller, 29 … belt guide, 30 … fabric recovery section, 31 … shaft section, 32 … bearing section, 40 … printing section, 41 … head, 41a … discharge surface, 42 … head moving section, 43 … nozzle, 50 … maintenance section, 51 … processing section, 52 … base, 60 … fabric pushing section, 80 … device control section, 81 … interface, 82 …, … CPU, 3683 memory, 84 DSP 72 drive control section, 3690 image processing device, 3691, … image control section, … input section, … memory, … display section, 3695 ASIC …, … memory, … display section, 3695, 99 … interface, 100 … dye printing device.
Detailed Description
Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. The following is an embodiment of the present invention, and the present invention is not limited thereto. In the following drawings, for convenience of explanation, description will be made on a scale different from an actual scale. In addition, in the coordinates marked on the drawing, the Z-axis direction is the up-down direction, + Z-direction is the up direction, the X-axis direction is the front-rear direction, -X-direction is the front-side direction, -Y-axis direction is the left-right direction, + Y-direction is the left direction, and the X-Y plane is the horizontal plane.
(embodiment mode)
Basic structure of printing apparatus
Fig. 1 is a schematic view showing a printing apparatus 100 as a printing apparatus according to the present embodiment, and shows the printing apparatus 100 installed on a floor surface 9 from the front.
The printing apparatus 100 is an ink jet printing apparatus that prints a fabric 1 by discharging (applying) ink droplets to the fabric 1 as a "printing medium" to form an image. As the fabric 1, for example, cotton, silk, wool, chemical fiber, blended fabric, or the like is used.
The printing apparatus 100 includes a fabric supply unit 10, a fabric transport unit 20, a fabric collection unit 30, a printing unit 40, a maintenance unit 50, a fabric pressing unit 60, an apparatus control unit 80, an image processing apparatus 90, and the like.
The fabric supply section 10 stores the fabric 1 before being applied with ink, that is, before a desired image is formed. The fabric supply section 10 includes a shaft 11 and a bearing 12.
The shaft portion 11 supports the band-shaped fabric 1 wound in a roll in a rotatable manner in the circumferential direction. The shaft portion 11 is detachably attached to the bearing portion 12.
The bearing portion 12 has a rotation driving portion (not shown) for rotatably driving the shaft portion 11, and rotatably supports the shaft portion 11. The rotation driving section is controlled by the apparatus control section 80 to rotate the shaft section 11 in the feeding direction when the fabric 1 is easily stretched. When tension needs to be applied to the fabric 1, the rotation is stopped and the applied load is controlled.
The fabric conveying section 20 conveys the fabric 1 on a conveying path from the fabric supply section 10 to the fabric collection section 30 via the printing section 40. The fabric conveying section 20 includes: conveying rollers 21, 26, 28, a tension roller 22, a conveying belt 23, a belt rotating roller 24, a belt driving roller 25, a drying unit 27, a belt guide 29, and the like.
The conveyor belt 23 is formed in an endless shape and is hung on a belt rotating roller 24 and a belt driving roller 25. The conveyor belt 23 is held in a state in which a predetermined tension is applied so that a portion extending between the belt turning roller 24 and the belt driving roller 25 is parallel to the floor surface 9. An adhesive layer (not shown) for bonding the fabric 1 is provided on the surface (support surface 23a) of the conveyor belt 23. The conveyor belt 23 supports the fabric 1 on a support surface 23a provided with an adhesive layer.
The belt rotating roller 24 and the belt driving roller 25 support the inner circumferential surface 23b of the conveying belt 23. Further, the following may be configured: between the belt turning roller 24 and the belt driving roller 25, a support portion is provided for supporting the conveyor belt 23 from the inner peripheral surface 23 b.
In the conveying path, a belt driving roller 25 is disposed downstream of the belt rotating roller 24. The belt driving roller 25 is controlled to rotate by the apparatus control section 80. The conveyor belt 23 is rotated by the rotation of the belt driving roller 25, and the belt rotating roller 24 is rotated in accordance with the rotation of the conveyor belt 23. The fabric 1 supported by the conveyor belt 23 (support surface 23a) is conveyed in the conveying direction by the rotation of the conveyor belt 23. That is, the direction from the belt-rotating roller 24 toward the belt-driving roller 25 is the conveying direction.
The tension roller 22 is provided between the fabric supply section 10 and the conveyor belt 23 in the conveying path, and generates a predetermined tension in the fabric 1 between the conveyor belt 23 (the support surface 23a to which the fabric 1 is bonded).
The feed roller 21 transfers the fabric 1 between the fabric supply section 10 and the tension roller 22.
The conveying roller 26 transfers the fabric 1 conveyed by the conveying belt 23.
The drying unit 27 is provided between the conveyance roller 26 and the conveyance roller 28, and guides and dries the fabric 1 to which the ink is applied. The conveying roller 28 conveys the fabric 1 guided by the drying unit 27 to the fabric collecting section 30.
The belt guide 29 is a pair of flat plate-like guides provided so as to sandwich the conveyor belt 23 from both ends in the width direction of the conveyor belt 23 in a region (printing region) facing the printing portion 40 of the conveyor belt 23, and thereby can prevent the conveyor belt 23 from being displaced in a direction intersecting the conveying direction in the printing region.
The fabric collecting section 30 stores the fabric 1 that is applied with ink and dried (that is, formed (printed) with a desired image). The fabric collecting portion 30 includes a shaft portion 31 and a bearing portion 32.
The shaft 31 is rotatably provided in the circumferential direction to wind the fabric 1 in a roll shape and store the same. The shaft 31 is detachably attached to the bearing 32.
The bearing portion 32 includes a rotation driving portion (not shown) for rotatably driving the shaft portion 31, and rotatably supports the shaft portion 31. The rotation driving section is controlled by the apparatus control section 80 to rotate the shaft section 31 in the direction in which the fabric 1 is wound.
The printing unit 40 discharges ink droplets to the fabric 1 under the control of the apparatus control unit 80. The printing unit 40 includes: a head 41, a head moving unit 42, and an ink supply unit (not shown). The head 41 includes an ejection surface 41a that ejects ink supplied from the ink supply unit as ink droplets. A plurality of nozzles 43 for ejecting ink droplets are formed on the ejection surface 41 a. In the printing area, the discharge surface 41a is provided so as to face the fabric 1 conveyed by the conveyor belt 23.
The head moving section 42 is configured by a carriage on which the head 41 is mounted, a guide shaft provided in a direction intersecting the conveying direction of the fabric 1, a drive mechanism for moving the carriage along the guide shaft, and the like (not shown), and moves the head 41 along the width direction (X-axis direction) of the fabric 1 intersecting the conveying direction.
Fig. 4 is a schematic diagram showing an example of the arrangement of the nozzles 43 as viewed from the lower surface of the head 41.
In the head 41, for example, four nozzle rows are formed by a plurality of nozzles 43 arranged along the transport direction (Y-axis direction) of the fabric 1, and each nozzle row discharges ink of a different color (for example, cyan: C, magenta: M, yellow: Y, black: K). In the example shown in fig. 4, each nozzle row is constituted by 400 nozzles 43 of #1 to # 400.
The maintenance unit 50 (see fig. 1) performs maintenance of the conveyor belt 23 under the control of the apparatus control unit 80. The maintenance unit 50 includes a processing unit 51, a base 52, and the like. The processing unit 51 includes a mechanism (not shown) for performing various processes on the conveyor belt 23, such as a removing unit for removing foreign matter such as dust or thread ends adhering to the conveyor belt 23, or an adhesive layer repairing unit for repairing an adhesive layer of the conveyor belt 23 when the adhesive layer is deteriorated. The base 52 supports the treatment unit 51 so as to be movable up and down.
The fabric pressing portion 60 is provided above the conveyor belt 23 on the upstream side of the conveying path from the printing portion 40. The fabric pressing section 60 presses the fabric 1 against the support surface 23a having the adhesive layer, and prevents the fabric 1 from separating (floating) from the conveyor belt 23.
Fig. 2 is a block diagram illustrating functions of the apparatus control unit 80 and the image processing apparatus 90.
The image processing apparatus 90 includes an image control unit 91, an input unit 92, a display unit 93, a storage unit 94, and the like, and executes data transmission and reception with an external electronic device connected via a network or the like, operation control for printing by the printing apparatus 100, image processing related to printing, and the like. The image processing apparatus 90 is preferably configured using a personal computer.
The software operated by the image processing apparatus 90 includes general image processing application software (hereinafter, referred to as an application) for processing print image data, and printer driver software (hereinafter, referred to as a printer driver) for generating print data necessary for the printing apparatus 100 to perform printing based on the image data.
The image control unit 91 includes: a CPU (Central Processing Unit) 95, an ASIC (Application Specific Integrated Circuit) 96, a DSP (Digital Signal Processor) 97, a memory 98, and an interface 99.
The input unit 92 is an information input unit as a man-machine interface. Specifically, the input device is, for example, a keyboard or a port to which an information input device is connected.
The display unit 93 is an information display unit (display) as a man-machine interface, and displays information input from the input unit 92, information relating to a printed image, a print job, and the like, under the control of the image control unit 91.
The storage unit 94 is a rewritable storage medium such as a Hard Disk Drive (HDD) or a memory card, and stores software (a program operated by the image control unit 91) operated by the image processing apparatus 90, information relating to a print image or a print job, and the like.
The memory 98 is a storage medium for securing a storage area of a program operated by the CPU95 or a work area of the operation, and is configured by a storage element such as a RAM or an EEPROM.
The apparatus control unit 80 includes an interface 81, a CPU82, a memory 83, a drive control unit 84, and the like, and collectively controls the respective drive units of the printing apparatus 100. Specifically, the apparatus control section 80 executes control of the printing section 40 (ink discharge control to the head 41, head movement control to the head moving section 42), conveyance drive control to the fabric conveying section 20, and the like.
At the time of printing, the apparatus control section 80 repeatedly executes the following operations with respect to the fabric 1 supplied to the printing area by the fabric conveying section 20, based on the print data transmitted from the image processing apparatus 90: discharging ink droplets from the head 41 while moving the carriage supporting the head 41 along the guide shaft in the main scanning direction (X-axis direction); and the fabric 1 is moved in a conveying direction (+ Y direction) intersecting the main scanning direction by the fabric conveying section 20 (conveying belt 23). By the above operation, a desired image is formed (printed) on the fabric 1.
The interface 81 is connected to the image processing apparatus 90 (interface 99), and performs transmission and reception of data with the image processing apparatus 90.
The CPU82 is an arithmetic processing unit for performing drive control of the entire textile printing apparatus 100.
The memory 83 is a storage medium for securing a storage area of a program operated by the CPU82 or a work area of the operation, and is constituted by a storage element such as a RAM or an EEPROM.
The CPU82 controls the fabric supply section 10, the fabric conveying section 20, the fabric collecting section 30, the printing section 40, the maintenance section 50, and the fabric pressing section 60 via the drive control section 84, based on the program stored in the memory 83 and the print data received from the image processing apparatus 90.
Basic function of printer driver
Fig. 3 is an explanatory diagram of basic functions of the printer driver.
The print data is transmitted from the image processing apparatus 90 to the apparatus control section 80 via the printer driver, and the printing on the fabric 1 is started. The print data is generated by a printer driver.
Next, the process of generating print data will be described with reference to fig. 3.
The printer driver receives image data from the application program, converts the image data into print data in a format that can be interpreted by the apparatus control unit 80, and outputs the print data to the apparatus control unit 80. When converting image data from an application program into print data, a printer driver executes resolution conversion processing, color conversion processing, halftone processing, rasterization processing, command addition processing, and the like.
The resolution conversion process is a process of converting image data output from an application program into a resolution (printing resolution) when printing is performed on the fabric 1. For example, in the case where the print resolution is designated 720 × 720dpi, image data in a vector format received from an application program is converted into image data in a bitmap format having a resolution of 720 × 720 dpi. Each pixel data of the image data after the resolution conversion process is composed of pixels arranged in a matrix. Each pixel has, for example, 256 levels of gray scale values of the RGB color space. That is, the resolution-converted pixel data represents the gradation value of the corresponding pixel.
Pixel data corresponding to 1 column of pixels arranged in a predetermined direction among the pixels arranged in a matrix is referred to as dot matrix data. The predetermined direction in which the pixels corresponding to the dot data are arranged corresponds to the moving direction (main scanning direction) of the head 41 when printing an image.
The color conversion process is a process of converting RGB data into data of a CMYK color space. The CMYK colors are cyan (C), magenta (M), yellow (Y), and black (K), and image data in the CMYK color space corresponds to ink colors included in the printing apparatus 100. Therefore, for example, when 10 inks of CMYK color systems are used in the printing apparatus 100, the printer driver generates image data of 10-dimensional space of CMYK color systems from RGB data.
The color conversion process is performed based on a table (color conversion look-up table LUT) in which gradation values of RGB data and gradation values of CMYK color system data are associated with each other. Further, the pixel data after the color conversion processing is CMYK color system data of, for example, 256 levels expressed by a CMYK color space.
The halftone process is a process of converting data of a high number of gradations (256 levels) into data of a number of gradations that can be formed by the printing apparatus 100. By this halftone processing, data representing 256 levels is converted into, for example, 1-bit data representing 2 levels (presence or absence of dots) or 2-bit data representing 4 levels (absence of dots, small dots, medium dots, large dots). Specifically, the dot generation rate corresponding to the gradation value (for example, in the case of 4 levels, the generation rates of no dot, small dot, medium dot, and large dot) is obtained from the dot generation rate table in which the gradation value (0 to 255) and the dot generation rate correspond, and pixel data is created so that dots are formed in a dispersed manner by a dither method, an error diffusion method, or the like in the obtained generation rate.
The rasterizing process is a process of sorting pixel data (for example, the above-described 1-bit or 2-bit data) arranged in a matrix in the order of dot formation in printing. The rasterization process includes the following distribution process: the image data composed of the pixel data after the halftone processing is distributed to each path operation in which the head 41 (nozzle row) ejects ink droplets while scanning. After the assignment process is completed, the pixel data arranged in a matrix is assigned to the actual nozzles forming the dot matrix lines constituting the print image.
The command addition processing is processing for adding command data corresponding to the printing method to the data subjected to the rasterization processing. Examples of the command data include transport data related to the transport specification (movement amount, speed, and the like in the transport direction) of the print medium (fabric 1).
The above-described processing by the printer driver is performed by the ASIC96 and the DSP97 (see fig. 2) under the control of the CPU95, and the generated print data is transmitted to the apparatus control unit 80 through the interface 99 by print data transmission processing.
In the printing apparatus 100 having the basic configuration described above, when the transport belt 23 is slightly displaced in the width direction (X-axis direction) of the fabric 1 intersecting the transport direction (Y-axis direction) in the printing area, the landing positions of the ink droplets (dot positions formed by the ink droplets) discharged onto the fabric 1 are displaced by the displacement of the position of the fabric 1 in the X-axis direction, and the printing quality (image quality) constituted by a plurality of dots may be degraded.
The guide 29 guides the fabric 1 so as to be in contact with the widthwise end of the conveyor belt 23, thereby suppressing a large meandering in the width direction (X-axis direction) of the fabric 1 intersecting the conveying direction (Y-axis direction) of the conveyor belt 23. However, for example, when the length of the short side of the conveyor belt 23 varies, or when the end portion in the width direction has irregularities due to the degree of processing of the conveyor belt 23, the conveyor belt 23 may be slightly displaced due to stress from the belt guide 29 which slides against the conveyor belt 23 as the conveyor belt 23 rotates. Further, in addition to the above, the conveyor belt 23 may be slightly displaced due to, for example, eccentricity of the conveyor rollers 21, 26, 28, the tension roller 22, the conveyor belt 23, the belt rotating roller 24, the belt driving roller 25, or the like, or deviation in assembly accuracy or the like.
Thus, in the textile printing apparatus 100 of the present embodiment, the displacement amount of the conveyor belt 23 in the direction intersecting the conveying direction, which is caused by the movement of the conveyor belt 23 in the conveying direction, is evaluated and acquired as displacement characteristic data included in the textile printing apparatus 100, and the apparatus control unit 80 can correct the position at which the ink droplets are applied in the direction intersecting the conveying direction, based on the displacement characteristic data.
The following is a detailed description.
Displacement characteristic data
First, the displacement characteristic data and the method of acquiring the displacement characteristic data will be described. The method for adjusting the printing apparatus 100 according to the present invention includes a step of acquiring the displacement characteristic data.
A predetermined pattern is printed on a printing medium (fabric 1 or printing paper) placed (supported) on the conveyor belt 23 and conveyed to the printing area, and the amount of displacement of the conveyor belt 23 in the direction intersecting the conveying direction is determined by analyzing the printed predetermined pattern.
Fig. 5 is an explanatory diagram showing an example of a predetermined pattern for obtaining the displacement amount.
The predetermined pattern is a landing pattern (dot row K shown in fig. 5) formed by ink droplets discharged from a specific nozzle row provided on the head 41. The specific nozzle row is any one of nozzle rows including a plurality of nozzles 43 (see fig. 4) arranged along the transport direction, and is, for example, a nozzle row for discharging black ink (K). The dot row K of the predetermined pattern shown in fig. 5 is a line formed of dot rows.
First, the transport belt 23 is stopped at the origin position of the transport system, and the head 41 is stopped at a predetermined position (for example, substantially the center of the short side of the transport belt 23) in the main scanning direction (X-axis direction), and one droplet of ink is discharged from the nozzle row to form a dot row K1. Next, the print medium is moved by the same length D as the nozzle row in the conveyance direction (+ Y direction), and one ink droplet is discharged from the nozzle row again to form a dot row K2. Similarly, the movement of the print medium and the discharge of ink droplets are repeated to print a dot row K as a predetermined pattern consisting of dot rows K1 to Kn.
Here, the origin position of the conveying system is a predetermined position where the rotational position of the conveying belt 23 constituting the fabric conveying section 20 or the rotational position of each conveying roller is specified, and may be a reproducible position. Information on the rotational position of the conveying belt 23 or the rotational position of each conveying roller is obtained by, for example, encoders or the like provided at various places.
Next, the printing medium on which the predetermined pattern (dot row K) is printed is taken out from the printing apparatus 100, and the displacement amounts of the dot rows K1 to Kn in the main scanning direction (X-axis direction) are measured. The method of measuring the displacement amount is not particularly limited, and for example, an image of a predetermined pattern (dot row K) is captured as image data by using a ccd (charge Coupled device) image sensor or the like and extracted by image processing. In the present embodiment, the image processing apparatus 90 captures a predetermined pattern (dot row K) as image data, and the image control unit 91 performs image processing to determine the amount of displacement. That is, the image processing apparatus 90 has functions as an "image processing section": in order to measure the amount of displacement, the predetermined pattern printed by the printing unit 40 is subjected to image recognition and image processing, thereby obtaining displacement characteristic data.
In addition, the printing apparatus 100 may be provided with an image acquisition unit such as a CCD image sensor so that the amount of displacement can be measured without taking out the printing medium on which the predetermined pattern (dot row K) is printed from the printing apparatus 100. In this case, the image acquiring unit is disposed at a position where an image printed with a predetermined pattern (dot row K) can be acquired, that is, at a downstream side of the transport path of the fabric 1 with respect to the head 41. The image data acquired by the image acquisition unit is preferably configured to be transmitted to the image processing device 90. In this case, the image processing apparatus 90 functions as an "image processing unit" including the image acquisition unit.
In this configuration, in order to prevent the image of the predetermined pattern (dot row K) from being affected by displacement in the direction intersecting the conveying direction of the conveyor belt 23 when acquiring the image of the predetermined pattern, for example, a straight line (reference line extending along the conveying direction) serving as a reference is preferably provided in advance on a print medium on which the predetermined pattern (dot row K) is printed. With this arrangement, a relative value to the reference line in the X-axis direction is obtained as a displacement amount.
As a method of obtaining the displacement amount by image processing from the image data of the predetermined pattern (dot sequence K), for example, there is the following method: the position of the center of gravity P of each of the dot row K1 to the dot row Kn is obtained (the center of gravity position of the dot row K3 is denoted as P in fig. 5), and the displacement amount in the X-axis direction is obtained. The difference between the position (X value) of the center of gravity P of each dot row Kn and the position (X value) of the center of gravity P of the dot row K1 at the reference position is obtained as displacement characteristic data.
Fig. 6 is a graph showing an example of plotting displacement characteristic data of the conveyor belt 23 obtained from image data of the predetermined pattern (dot row K) of fig. 5. For example, as in the dot row K2 shown in fig. 5, since the dot row K1 of the print position relative to the reference position is shifted in the + X direction and indicates that the print medium (the transport belt 23) is displaced in the-X direction, the polarity of the X axis shown in each drawing of the graph shown in fig. 6 is opposite to the polarity of the shift in the X axis direction of the corresponding dot row in the dot row shown in fig. 5.
The predetermined pattern is not limited to the above-described pattern. Any pattern may be used as long as it is possible to obtain the displacement amount in the direction intersecting the conveying direction of the conveyor belt 23 as the displacement characteristic data by the position of the conveying system (fabric conveying section 20) (for example, the rotational position of the conveyor belt 23). For example, the pattern may be obtained by discharging ink droplets at a fixed interval from a specific nozzle 43 that moves to a substantially central position of the short side of the conveyor belt 23 while rotating the conveyor belt 23 at a fixed speed from the origin position of the conveyor system, thereby forming a continuous dot row.
If the displacement of the conveyor belt 23 in the direction intersecting the conveying direction, which is accompanied by the movement of the conveyor belt 23 in the conveying direction, is caused by the irregularities at the end in the width direction of the conveyor belt 23, the period of the displacement characteristic data coincides with the rotation period of the conveyor belt 23, and if other factors are combined, the period may become longer.
Fig. 7 is a graph showing an example of plotting two cycles of the measured displacement characteristic data. In the case where the conveying belt 23 is displaced in the direction intersecting the conveying direction due to a number of important factors, the period T of the displacement characteristic data is longer than the rotation period of the conveying belt 23.
In this way, when the displacement characteristic data is obtained as a characteristic having periodicity, regardless of the cause, the position at which the ink droplet is applied in the direction intersecting the transport direction can be corrected based on the displacement characteristic data in accordance with the transport amount from the origin position of the transport system, thereby suppressing the degradation of the print quality. Further, by adjusting the printing apparatus 100 based on the displacement width in the direction intersecting the transport direction of the transport belt 23 and the distribution of the displacement positions, it is possible to suppress a decrease in print quality.
Next, the adjustment method and the correction method will be specifically described.
Determination of adjustment position of printing apparatus (printing apparatus)
One of the adjustment contents of the printing apparatus 100 is adjustment of the landing positions of ink droplets in the main scanning direction (X-axis direction). This is to correct the landing position deviation of the ink droplets in accordance with the scanning movement of the head 41, and first, the landing positions of the ink droplets in the outward path of the scanning movement are determined as target points, and then, the landing positions of the ink droplets in the backward path of the scanning movement are adjusted so as to overlap the landing positions of the ink droplets in the outward path (correction of the positional deviation).
The target point is a position for specifying a print area in the main scanning direction (X-axis direction), and by specifying the target point, the position of the pixel data of the print image arranged in a matrix on the X-axis with respect to the fabric 1 can be specified. That is, the positions at which the landing positions of the ink droplets in the outward path and the return path of the scanning movement are shifted and overlapped are moved on the X axis, and the position of the printing area is also moved in accordance with the amount of the movement.
The adjustment method of the textile printing apparatus 100 according to the present embodiment includes the steps of: the rotational position of the conveyor belt 23 at which the printing apparatus 100 is adjusted is determined based on the displacement characteristic data. Specifically, the rotational position of the conveyor belt 23 for determining the above-described target point is determined based on the displacement characteristic data. More specifically, the center value of the width of the conveyor belt 23 displaced in the direction intersecting the conveying direction is obtained from the displacement characteristic data, and the rotational position at which the conveyor belt 23 is located at the center value is determined as the rotational position at which the target point conveyor belt 23 is specified. For example, in the example shown in fig. 7, as the rotational position of the transport belt 23 in the period T, the positions of y1, y2, and y3 are the rotational positions of the transport belt 23 at the center value (x3) of the width (x1 to x2) of the transport belt 23 displaced in the direction intersecting the transport direction, and therefore, the adjustment of the printing apparatus 100 (the determination of the target point and the correction of the deviation of the ink droplet landing position) is performed at any position.
When it is confirmed that the displacement characteristic data is periodic, that is, when the displacement amount of the transport belt 23 in the direction intersecting the transport direction is reproducible by the position of the transport system (fabric transport section 20), the positions of y1, y2, and y3 can be easily obtained as the position of x3 by referring to the displacement characteristic data.
For example, when the displacement characteristic data is obtained as the function f (m, n, l) based on the causes m, n, l, the following method may be adopted: the center value x3 is obtained from the minimum value x1 and the maximum value x2, and the position of the transport system (fabric transport section 20) is derived as m, n, and l of x 3.
In the present embodiment, the displacement characteristic data obtained by the image processing device 90 is stored in the memory 83 provided in the device control unit 80. The apparatus control unit 80 determines a printing reference position in a direction intersecting the transport direction based on the displacement characteristic data stored in the memory 83. Specifically, first, the apparatus control unit 80 derives the position (for example, the rotational position of the conveyor belt 23) of the conveyor system (fabric conveyor unit 20) for specifying the target point based on the displacement characteristic data, and drives the conveyor system (fabric conveyor unit 20) so that the head 41 moves to the derived position. Next, the apparatus control unit 80 derives a target point (a landing position of an ink droplet in the outward path of the scanning movement) based on the displacement characteristic data, and drives the head moving unit 42 to move the head 41 to the target point.
The operator of the printing apparatus 100 adjusts the landing positions of the ink droplets on the return path of the scanning movement (corrects the positional deviation) so as to be aligned with the target points.
As described above, the target point is a point for specifying the print area in the main scanning direction (X-axis direction), and specifying the target point is a point for specifying the print reference position in the direction intersecting the transport direction.
In addition, since the target point is a point that specifies the print area in the main scanning direction (X-axis direction), in other words, specifying the target point based on the displacement characteristic data means correcting the ink droplet application position in the direction intersecting the transport direction based on the displacement characteristic data.
Correction of ink discharge position
In the present embodiment, when the obtained displacement characteristic data is characteristic data having periodicity, that is, when the displacement characteristic data includes data of at least one cycle in which the amount of displacement changes, the apparatus control portion 80 corrects the ink droplet applying position in the direction intersecting the transport direction at the rotational position, based on the amount of displacement obtained in accordance with the rotational position of the transport belt 23 in one cycle.
Specifically, for example, when it is desired to print the following straight lines using only the nozzle rows that discharge black ink: that is, when the feeding pitch in the conveying direction (Y-axis direction) is based on a straight line extending in one conveying direction (Y-axis direction) at intervals of the pitch D from the reference position, the conveyor belt 23 is displaced based on the displacement characteristic data shown in fig. 6, and the printed straight line becomes a discontinuous straight line shown in fig. 5. Since the displacement amount corresponding to the rotational position of the transport belt 23 is obtained from the displacement characteristic data, the device control unit 80 performs correction control of the ink droplet ejection timing based on each passing position (i.e., the rotational position of the transport belt 23), and thus can print a discontinuous straight line to a straight line more similar to a straight line.
More specifically, the apparatus control unit 80 creates a data table with the correction amount of ink droplet discharge timing corresponding to the correction amount in the X-axis direction. The position of the printing straight line can be corrected to an appropriate position by correcting the driving timing of the head 41 by the drive control unit 84 (see fig. 2) only by the correction amount corresponding to each path.
Further, since the correction amount of the timing of ink droplet ejection can be easily calculated from the moving speed of the carriage, the ejection may be corrected in real time at a timing at which the integrated value matches the correction amount in the X-axis direction while detecting the moving speed of the carriage.
As described above, according to the printing apparatus and the method for adjusting the printing apparatus according to the present embodiment, the following effects can be obtained.
The device control unit 80 corrects the ink droplet applying position in the direction intersecting the transport direction based on displacement characteristic data indicating the amount of displacement of the transport belt 23 in the direction intersecting the transport direction accompanying the movement of the transport belt 23 in the transport direction. That is, the positions of the ink droplets applied to the fabric 1, which is conveyed by the conveyor belt 23 and whose positions are displaced in accordance with the displacement of the conveyor belt 23, are corrected based on displacement characteristic data indicating the displacement amount of the conveyor belt 23 in the direction intersecting the conveying direction in accordance with the movement of the conveyor belt 23 in the conveying direction. As a result, the displacement of the conveyor belt 23 in the direction intersecting the conveying direction can be corrected with higher accuracy, and the deterioration of the print quality due to the displacement can be more effectively suppressed.
The device control unit 80 also specifies the printing reference position in the direction intersecting the transport direction based on displacement characteristic data indicating the amount of displacement of the transport belt 23 in the direction intersecting the transport direction, which is caused by the movement of the transport belt 23 in the transport direction. As a result, the fabric 1 conveyed by the conveyor belt 23 and displaced in position along with the displacement of the conveyor belt 23 can be printed at a more appropriate position.
When the acquired displacement characteristic data indicating the amount of displacement of the conveyor belt 23 in the direction intersecting the conveying direction accompanying the movement of the conveyor belt 23 in the conveying direction is periodic displacement characteristic data, that is, when the displacement characteristic data includes data of at least one cycle in which the amount of displacement changes, the apparatus control unit 80 corrects the ink droplet application position in the direction intersecting the conveying direction at the rotation position based on the amount of displacement obtained in accordance with the rotation position of the conveyor belt 23 in one cycle. That is, the positions to which the ink droplets are applied on the fabric 1 conveyed by the conveyor belt 23 and displaced along with the displacement of the conveyor belt 23 are corrected based on the data (displacement characteristic data) of the displacement amount corresponding to the movement position of the conveyor belt 23 in the conveying direction. As a result, the displacement of the conveyor belt 23 in the direction intersecting the conveying direction can be corrected with higher accuracy, and the print quality can be suppressed from being degraded.
The printing apparatus 100 further includes an image processing device 90 as an image processing unit that performs image recognition on a predetermined pattern printed by the printing unit 40 and acquires displacement characteristic data by image processing in order to measure a displacement amount of the transport belt 23 in a direction intersecting the transport direction in accordance with the movement of the transport belt 23 in the transport direction. Therefore, for example, the user of the printing apparatus 100 can update the displacement characteristic data to cope with the latest state of the printing apparatus 100. As a result, the displacement of the conveyor belt 23 in the direction intersecting the conveying direction can be corrected with higher accuracy, and the degradation of the print quality can be suppressed.
Further, the adjustment method of the textile printing apparatus 100 according to the present embodiment includes the steps of: a step of acquiring displacement characteristic data indicating a displacement amount of the conveyor belt 23 in a direction intersecting the conveying direction accompanying movement of the conveyor belt 23 in the conveying direction; and a step of determining a rotational position of the transport belt 23 at which the printing apparatus 100 is adjusted based on the acquired displacement characteristic data. Further, in the rotational position determined here, the ink-droplet imparting position in the direction intersecting the conveying direction is adjusted. That is, the ink-droplet applying position in the direction intersecting the conveying direction is adjusted at the rotational position determined based on the displacement characteristic data indicating the amount of displacement of the conveying belt 23 in the direction intersecting the conveying direction accompanying the movement of the conveying belt 23 in the conveying direction. Therefore, the position at which ink droplets are applied can be adjusted at a position at which the displacement of the conveyor belt 23 in the direction intersecting the conveying direction is more stable, and more appropriate adjustment can be performed.
Further, since the center value of the width of the conveyor belt 23 displaced in the direction intersecting the conveying direction can be adjusted in the ink droplet applying position in the direction intersecting the conveying direction in the rotational position of the conveyor belt 23 when the conveyor belt 23 is at the center value, the ink droplet applying position can be adjusted in a position where the displacement of the conveyor belt 23 in the direction intersecting the conveying direction is more stable, and more appropriate adjustment can be performed.
The present invention is not limited to the above embodiments, and various modifications, improvements, and the like may be made to the above embodiments. Next, a modified example will be explained. Here, the same components as those in the above embodiment are denoted by the same reference numerals, and redundant description thereof is omitted.
(modification 1)
In the above-described embodiment, the rotational position of the transport belt 23 for specifying the target point in the adjustment of the printing apparatus 100 is set to the rotational position of the transport belt 23 when the transport belt 23 is located at the center value of the width of the transport belt 23 displaced in the direction intersecting the transport direction, but the present invention is not limited thereto.
The following method may also be adopted: the most frequent position at which the transport belt 23 is most frequently positioned in the direction intersecting the transport direction is determined from the displacement characteristic data, and the rotational position of the transport belt 23 when the transport belt 23 is positioned at the most frequent position is determined as the rotational position of the transport belt 23 for adjusting the printing apparatus 100. According to this method, the ink droplet applying position in the direction intersecting the transport direction can be adjusted at the most frequent position where the transport belt 23 is most often located in the direction intersecting the transport direction, and more efficient adjustment with a higher time contribution rate reflecting the adjustment result can be performed.
(modification 2)
In the above-described embodiment, the image processing device 90 has been described as an example of a function as an "image processing unit" that performs image recognition on a predetermined pattern printed by the printing unit 40 and acquires displacement characteristic data by image processing in order to measure the displacement amount of the conveyor belt 23 in the direction intersecting the conveying direction in accordance with the movement of the conveyor belt 23 in the conveying direction, but the printing apparatus 100 may not include the "image processing unit".
For example, the following may be configured: the manufacturer that manufactures the textile printing apparatus 100 acquires the displacement characteristic data of the conveyor belt 23 for each textile printing apparatus 100, stores the displacement characteristic data in the memory 83 or the storage unit 94, and provides the textile printing apparatus 100 to the user. In the use stage of the user, the apparatus control unit 80 can perform the same adjustment or correction as in the above-described embodiment by acquiring the displacement characteristic data stored in the memory 83 or the storage unit 94.
Alternatively, the following method may be adopted: when the printing apparatus 100 is maintained, a predetermined pattern for acquiring the displacement characteristic data described in the above embodiment is printed, and the result is analyzed to create displacement characteristic data by using a unit other than the image processing apparatus 90.
Claims (5)
1. A printing apparatus is characterized by comprising:
a conveyor belt that conveys a printing medium in a conveying direction;
a printing unit that performs printing by applying ink droplets to the transported print medium; and
a control section for controlling a position to which the ink droplet is applied,
the control unit corrects a position to which the ink droplet is applied in a direction intersecting the transport direction based on displacement characteristic data indicating a displacement amount of the transport belt in the direction intersecting the transport direction accompanying movement of the transport belt in the transport direction, and adjusts the printing device,
the printing device obtains a most frequent position where the conveyor belt is most frequently located in a direction intersecting the conveying direction from the displacement characteristic data, and determines a rotational position of the conveyor belt where the conveyor belt is located at the most frequent position as a rotational position of the conveyor belt for adjusting the printing device.
2. Printing device according to claim 1,
the control unit specifies a reference position of the printing in a direction intersecting the transport direction based on the displacement characteristic data.
3. Printing device according to claim 1 or 2,
the displacement characteristic data includes data of at least one cycle in which the amount of displacement changes,
the control section corrects a position to which the ink droplet is applied in a direction intersecting the transport direction at the rotational position, based on the displacement amount obtained in accordance with the rotational position of the transport belt in the one cycle.
4. Printing device according to claim 1 or 2,
the image processing unit is further provided for performing image recognition on the predetermined pattern printed by the printing unit to measure the displacement amount, and acquiring the displacement characteristic data by performing image processing.
5. A method for adjusting a printing apparatus,
the printing device is provided with:
a conveyor belt that conveys a printing medium in a conveying direction; and
a printing section that performs printing by giving ink droplets to the transported print medium,
the adjusting method of the printing device comprises the following steps:
a step of acquiring displacement characteristic data indicating a displacement amount of the conveyor belt in a direction intersecting the conveying direction accompanying movement of the conveyor belt in the conveying direction; and
determining a rotational position of the transport belt at which the printing device is adjusted based on the displacement characteristic data,
adjusting, in the determined rotational position, a position in a direction intersecting the transport direction at which the ink droplet is given,
the method of adjusting the printing apparatus obtains a most frequent position where the conveyor belt is most frequently located in a direction intersecting the conveying direction from the displacement characteristic data, and determines a rotational position of the conveyor belt where the conveyor belt is located at the most frequent position as a rotational position of the conveyor belt for adjusting the printing apparatus.
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| JP2016214917A JP6836134B2 (en) | 2016-11-02 | 2016-11-02 | Printing device and adjustment method of printing device |
| JP2016-214917 | 2016-11-02 |
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| CN108016149B true CN108016149B (en) | 2021-02-12 |
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| EP (1) | EP3318411B1 (en) |
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| EP3779069B1 (en) | 2018-03-30 | 2023-07-05 | Sumitomo (S.H.I.) Construction Machinery Co., Ltd. | Shovel |
| JP7163730B2 (en) * | 2018-11-12 | 2022-11-01 | コニカミノルタ株式会社 | Deformation correction device, recording medium conveying device and inkjet image forming device |
| JP7272048B2 (en) * | 2019-03-27 | 2023-05-12 | 京セラドキュメントソリューションズ株式会社 | image forming device |
| JP7413705B2 (en) * | 2019-10-08 | 2024-01-16 | セイコーエプソン株式会社 | Printing device, printing device control method, and control program |
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| EP3318411B1 (en) | 2020-09-02 |
| JP6836134B2 (en) | 2021-02-24 |
| JP2018069663A (en) | 2018-05-10 |
| EP3318411A1 (en) | 2018-05-09 |
| CN108016149A (en) | 2018-05-11 |
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