KR101164480B1 - Inkjet printer with print compensation device and method for compensating print using the same - Google Patents

Abstract

An inkjet printer equipped with a print correction device and a print correction method using the same according to the present invention, when the positions of the ejection holes corresponding to each other of the print nozzles are distorted, correct the position of the ejection holes corresponding to each other by software. Since the ink is ejected from each printing nozzle in one state, the printing position can be easily corrected so that the printing position can be corrected, thereby improving the printing accuracy and providing the effect of contributing to the improvement of the print quality.

Mechanical, software, injection, calibration, head unit, nozzle

Description

Inkjet printer with print compensation device and method for compensating print using the same {Inkjet printer with print compensation device and method for compensating print using the same}

TECHNICAL FIELD The present invention relates to a large size inkjet printer device used for industrial purposes and the like.

Inkjet printers can be classified into small and medium sized printers and large sized printers according to their sizes. Small and medium sized printers are usually used for home, office, etc., and large sized printers are mainly used for industrial purposes.

Among the large printers, there are a roll providing method and a plane fixing method according to a method of supplying a printing object. In the flat fixing method, the print head unit is moved to the printing surface of the printing object while the printing object is set on the upper part of the stage. Configured to effect printing.

The large-size inkjet printer of the planar fixing method is configured to print a large advertisement board, a banner or the like. As a printing target of such a printer, various materials can be printed from general papers, sheet-like structures such as vinyl, PVC, and silk, and plate-like structures such as wood, glass, stone, and metal.

1 is a schematic perspective view showing an example of a conventional planar fixed inkjet printer, in which the head support 5 and the head support 5 are fixed in a state where the printing object 3 is fixed to an upper side of the stage 1. It is made to print while moving the provided print head unit (7).

The print head unit 7 is provided with a plurality of print nozzles 8 for ejecting ink. FIG. 2 is a view showing a state where a plurality of (four) print nozzles 8 are arranged, typically C (Cyan: blue), M (Magenta: red), Y (Yellow: yellow), and K (black: black). ) Can be printed while selectively spraying ink such as color.

Each printing nozzle 8 is configured to eject ink of one color, and a plurality of injection holes 8a are formed at regular intervals according to a resolution to be implemented, that is, dots per inch (dpi). In the case of 720dpi, injection holes for forming 720 dots in 1 inch are formed.

In the case where a plurality of print nozzles 8 are arranged in parallel for color printing as shown in FIG. 2, the injection holes 8a of each print nozzle 8 must be aligned in a straight line in the printing direction to ensure accurate printing. It becomes possible.

When the injection holes 8a of the respective printing nozzles 8 are twisted in the lateral direction, the printing quality is lowered, and thus, a mechanical nozzle adjusting device is used to control them.

The mechanical nozzle adjusting device has an adjustment bolt 9b at the other end of the printing nozzle 8 with one end of each printing nozzle 8 being supported by the elastic member 9a as shown in FIG. It is configured to adjust and match the position of the injection holes (8a) of the plurality of printing nozzle using.

However, the nozzle adjusting device as described above is a method of adjusting the remaining printing nozzles (M, Y, K colors) around the first printing nozzle (C color) while the operator (or user) visually confirms the results. Because of the mechanical correction, the precise matching of the injection holes of the various printing nozzles is not easy, and there is a problem that it is difficult to exactly match the reality. There is also a problem that the nozzle adjustment work takes a considerable time.

The contents of the background art described above are technical information that the inventor of the present application holds for the derivation of the present invention or acquired in the derivation process of the present invention and is a known technology disclosed to the general public prior to the filing of the present invention I can not.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and when the positions of the corresponding ejection holes of each printing nozzle are distorted, by adjusting the positions of the ejection holes corresponding to each other by software, the printing accuracy can be easily adjusted. An object of the present invention is to provide an inkjet printer equipped with a print correction device capable of contributing to the improvement of print quality, and a print correction method using the same.

In addition, the present invention is configured to perform mechanical correction primarily, and to perform software correction secondarily, so as to quickly correct print position misalignment and to perform precise correction work, thereby providing print quality. An object of the present invention is to provide an inkjet printer with a print correction device capable of contributing to improvement and a print correction method using the same.

An inkjet printer with a print correction device according to the present invention for realizing the above object has a plurality of print nozzles sequentially arranged in a print movement direction (lateral direction), and each print nozzle is orthogonal to the print movement direction. 1, 2, 3,.. a print head unit having n ejection holes, wherein the nth ejection hole of each print nozzle corresponds to each other in the transverse direction with the nth ejection hole of another print nozzle to combine colors and to print a plurality of colors; A measuring unit which measures a state printed on a printing object by using the print head unit; By using the measurement information of the measuring unit, the plurality of printing nozzles detect a misalignment state between the nth injection holes corresponding to each other, and perform correction to adjust the injection holes corresponding to each other between the printing nozzles. And a correction output unit for outputting a print signal based on the result.

Preferably, the measurement unit is a vision camera mounted on the print head unit and photographing a printing state and inputting it to the correction output unit when printing on a print object.

The correction output unit may include: a print state detector configured to detect a difference in printing positions between the injection holes corresponding to each other in the print nozzles using the measurement information measured by the measurer; and a print nozzle detected by the print state detector. A printing reference correction unit for correcting printing reference information by readjusting the injection holes corresponding to each other according to the printing position difference between the injection holes corresponding to each other, and initial printing at the time of printing output according to the signal of the printing reference correction unit. And an output data correction unit for correcting the output information, and a drive signal output unit for outputting a signal input from the output data correction unit to the ink injection driver of each print nozzle.

A mechanical correction unit that adjusts the positions of the respective printing nozzles by physically adjusting the positions of the respective printing nozzles by adjusting the positions of the injection holes corresponding to each other using the correction output unit. It is preferable to comprise together a part.

A print correction method using an inkjet printer equipped with a print correction device according to the present invention for realizing the above object includes a first step of performing alignment printing on a print object while moving the print head unit in a lateral direction; A second step of measuring a printing state of a printing object during or after performing the first step in the measuring unit; A third step of detecting, by the correction output unit, a printing position shift amount by using the information measured in the second step; And a fourth step of outputting and printing a print signal based on the correction signal by correcting the positions of the ejection holes corresponding to each of the print nozzles when the print position is shifted by a predetermined level or more as a result of the detection in the third step. do.

Here, before the first step, a mechanical correction may be performed to physically adjust the positions of the printing nozzles so that the positions of the ejection holes corresponding to each other in the printing nozzles can be matched.

In the fourth step, it is preferable to correct the positions of the injection holes by resetting the injection holes of each print nozzle existing in the same print line in the printing movement direction of the print head unit to the injection holes corresponding to each other between the printing nozzles.

In the fourth step, if at least one of the injection holes corresponding to each other in each print nozzle does not exist in the same print line, the one-pass print area is removed with the exception of the printing line in which one or more injection holes do not exist. It is preferable to reset and output the print signal.

The main problem solving means of the present invention as described above, will be described in more detail and clearly through examples such as 'details for the implementation of the invention', or the accompanying 'drawings' to be described below, wherein In addition to the main problem solving means as described above, various problem solving means according to the present invention will be further presented and described.

An inkjet printer equipped with a print correction device and a print correction method using the same according to the present invention, when the positions of the ejection holes corresponding to each other of the print nozzles are distorted, correct the position of the ejection holes corresponding to each other by software. Therefore, the printing position can be easily corrected, thereby improving the printing accuracy.

In addition, the present invention is capable of quickly correcting a print position misalignment when configured to first perform mechanical correction and secondly to perform software correction, and also to perform a second more precise correction operation. This is possible and there is an effect that can contribute to the improvement of the print quality.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 3 is a perspective view of an embodiment of an inkjet printer with a print correction device according to the present invention, Figure 4 is a schematic block diagram showing a mechanical correction unit of the print correction device according to the present invention, Figure 5 A block diagram showing a software correction unit of the print correction device according to the present invention.

The inkjet printers illustrated in these figures illustrate an inkjet printer of a planar fixing method, but are not limited thereto and may be applied to other types of inkjet printers such as a roll providing method. Hereinafter, a description will be given of the inkjet printer of the planar fixing method.

The inkjet printer illustrated in FIG. 3 includes a stage 10 configured to fix a printing object 15 thereon, a head support 20 mounted to the stage 10 to be movable in the Y-axis direction, The head support 20 is installed to be movable in the X-axis direction and is printed using the print head unit 30 and the print head unit 30 provided with print nozzles 31 to perform a print job on the print object. A measurement unit (e.g., a vision camera; 40) for measuring the state printed on the object 15, and the print position is corrected when the print position is distorted using the measurement information of the measurement unit, and based on the correction signal And a correction output unit 50 for outputting a print signal.

In addition, the print head unit 30 is provided with a mechanical correction unit 60 of the printing correction apparatus according to the present invention, as shown in FIG. The mechanical correcting unit 60 will be described in detail below.

The main components of the inkjet printer according to the present invention configured as described above will be described in detail.

First, as shown in FIG. 3, the stage 10 may be formed to have a quadrangular plane as a whole so that the print object 15 may be placed on the upper surface, and may fix the position by absorbing the print object 15. It is desirable to have a suction function so as to form a negative pressure.

In addition, the stage 10 may be provided with a Y-axis guide 12 for guiding the movement of the head support 20 in the Y-axis direction.

The configuration of the stage 10 can be variously configured by using or combining the configuration of a well-known planar fixed type industrial printer according to the implementation conditions.

Next, the head support 20 is coupled to both sides of the stage 10 is configured to be linearly moved in the Y-axis direction, it is formed as a gantry structure as a whole. That is, the head support 20 is connected to the both side support 21, which is movably coupled to the Y-axis guide 12 formed on both sides of the stage 10, and connects the upper portion of the both support 21 to the print head unit It consists of a horizontal support 23 for supporting 30 to be moved in the X-axis direction.

Here, the both side support 21 or the stage 10 is provided with a drive unit to move the head support 20 in the Y-axis direction with respect to the stage. In FIG. 3, reference numeral 25 denotes a nozzle cleaning unit provided on both support members 21 to clean the print nozzles 31 while the print head unit 30 is moved.

The horizontal support 23 is provided with a linear motion (LM) guide to move the print head unit 30 in the X-axis direction, the LM guide can be appropriately configured using a known configuration so that the detailed description Omit. In Fig. 3, reference numeral 27 denotes an X-axis guide.

Next, the print head unit 30 includes a head support portion 33 which is moved in the X-axis direction in a state of being supported by the horizontal support 23 of the head support 20, and in front of the head support part 33. And a head main body 35 to which a print nozzle 31 or the like is mounted to perform a print job on the print object 15 fixed to the upper part of the stage 10.

The head body 35 is provided with a plurality of print nozzles 31, the print nozzles 31 are four colors, C (Cyan: blue), M (Magenta: red), Y (Yellow: yellow), It is preferable to arrange | position so that ink, such as K (black: black), may be ejected. In the present invention, the four printing nozzles (see Fig. 4; 31C, 31M, 31Y, 31K) for discharging four colors C, M, Y, K will be described with reference to the structure, but is not necessarily limited thereto. The same applies to inkjet printers having print nozzles of four or less colors or number of branches.

When the print nozzle 31 of the print head unit 30 has a structure injecting four colors of C, M, Y, and K, referring to FIG. 4, the print nozzles 31 are sequentially arranged in the printing movement direction (lateral direction). It has four printing nozzles 31C, 31M, 31Y, and 31K. Each of the printing nozzles includes ink 1, 2, 3,.. It has n injection holes 31a.

At this time, the n-th injection hole 31a of each of the printing nozzles 31C, 31M, 31Y, and 31K corresponds to each other in the lateral direction with the n-th injection hole 31a of the other printing nozzle and combines a plurality of colors to produce color printing. Is made possible. When printing a specific color at a specific position (pixel) of the print object, ink is ejected or not ejected from each of the nth ejection holes 31a in the four print nozzles 31C, 31M, 31Y, and 31K. It is configured to print.

The mechanical correcting unit 60 provided in the print head unit 30 will be described.

The mechanical corrector 60 physically adjusts the positions of the respective print nozzles 31C, 31M, 31Y, and 31K, and adjusts the positions of the ejection holes 31a corresponding to each other in the four print nozzles. Part. Such mechanical correction unit 60 may use a known mechanical correction device.

In FIG. 4, as an example of the mechanical correcting unit 60, each of the printing nozzles 31C, 31M, 31Y, and 31K is configured in the nozzle body 31b, and each nozzle body 31b is a head body (FIG. 3). 35) or four printing nozzles 31C, 31M, 31Y, and 31K may be mounted to be mounted in the nozzle case 61 for assembling into one set.

At this time, the mechanical corrector 60 allows one end of the nozzle body 31b (the upper end in FIG. 4) to be supported by the elastic member 63 in the head body or the nozzle case 61, and the other end thereof. An adjusting bolt 65 is coupled to the lower end in FIG. 4. The adjusting bolt 65 is configured to be fastened to the head body or the nozzle case 61.

The mechanical correcting unit 60 determines whether the injection holes 31a corresponding to each other at each of the printing nozzles 31C, 31M, 31Y, and 31K coincide with each other, and rotates the adjustment bolt 65 when they do not match. By moving the entire nozzle body 31b to be adjusted to adjust the position of the corresponding injection holes (31a) to each other.

However, since the positional adjustment of the injection holes 31a corresponding to each other by the mechanical corrector 60 is limited, it is preferable to additionally correct the software using the software corrector 70.

3, the software correcting unit may be largely composed of a measuring unit (for example, a vision camera 40) and a correction output unit 50. Each configuration will be described.

The measurement unit may be configured as a vision camera 40 for capturing an alignment print state printed on a printing object and converting the image to a digital signal. The printing correction method using the vision camera 40 will be described in detail below.

The correction output unit 50 includes n-th injection holes 31a corresponding to each other in the plurality of print nozzles 31C, 31M, 31Y, and 31K using measurement information of the vision camera 40, that is, photographing information. It is configured to detect a misaligned state between the print nozzles 31C, 31M, 31Y, and 31K to adjust the ejection holes 31a corresponding to each other, and then output a print signal based on this correction signal.

5, the correction output unit 50 is connected to each other in the plurality of print nozzles 31C, 31M, 31Y, and 31K by using the measurement information measured by the measurement unit, that is, the vision camera 40. Printing state detection unit 51 for detecting the difference in printing position between the corresponding injection holes 31a and injection nozzles corresponding to each other in the printing nozzles 31C, 31M, 31Y, and 31K detected by printing state detection unit 51 Printing according to the signal of the printing reference correction unit 53 and the printing reference correction unit 53 for correcting the printing reference information by readjusting the injection holes (31a) corresponding to each other according to the print position difference between the holes (31a) An output data correction unit 56 for correcting initial print output information at the time of output, and an ink injection drive unit 58 and a print head unit drive unit 59 of each print nozzle to output signals inputted from the output data correction unit 56; And a drive signal output section 57 or the like output to the back.

Here, the output data correction unit 56 is made to receive a signal from the print data input unit 55 for converting the input information for printing a single image to convert the printable data, and at the same time, the print reference correction unit It is configured to convert and output the information input from the print data input unit 55 based on the information input from the 53.

6 is a flowchart illustrating a printing correction method according to the present invention, Figures 7 to 9 are views for explaining the printing correction method according to the present invention, Figure 7 is a position of the injection hole when the printing position is optimal, FIG. 8 is a view showing the injection hole position when the printing position is changed, and FIG. 9 is a reference diagram showing the injection hole re-adjustment state by correction when the printing position is changed as shown in FIG. 8.

The printing correction method of the inkjet printer according to the present invention can be largely made in two ways.

In the first method, mechanically correcting the position of the printing nozzles 31C, 31M, 31Y, and 31K physically using the mechanical corrector 60 is performed first, and then secondarily, softwarely. It is a method of performing a software correction for precisely adjusting the corresponding positions of the injection holes 31a between the print nozzles 31C, 31M, 31Y, and 31K by using the correction unit 70.

The second method is a method of performing software correction without performing primary mechanical correction.

In the embodiment of the present invention described below, since the method of performing only the software correction, which is the second method, is included in the first method, the first method will be described.

Even if normal printing starts or during printing, the printing correction method according to the present invention can be carried out when necessary.

FIG. 7 illustrates a case where the injection holes 31a of the printing nozzles C, M, Y, and K coincide with the corresponding injection holes 31a. In this case, the printing correction method is described. There is no need to do it separately. That is, when the injection holes 31a positioned in each print line (row) in the four print nozzles C, M, Y, and K coincide with each other, for example, the print nozzles C, M, Y, and K If the first injection holes 31a of each of the printing nozzles C, M, Y, and K coincide with each other in the H1 line (row) included in this pass, the printing position does not change and accurate printing is possible. There is no need to perform print correction.

However, this is an ideal case, as illustrated in FIG. 8, when printing is performed in a state where the injection holes 31a of the printing nozzles C, M, Y, and K are twisted. A print correction method is performed. That is, the first injection holes 31a of each of the printing nozzles C, M, Y, and K do not have the H1 line, and the first injection hole of the C printing nozzle is the first injection hole of the H1 and M printing nozzles. No. 1 injection holes of H2 and Y printing nozzles are No. 1 injection holes of H1 and K printing nozzles respectively located on the H0 line, which makes it impossible to print an accurate image when a combination of these is used for color printing at a specific position (pixel). Problems will arise.

In order to correct | amend the printing position misalignment of each printing nozzle C, M, Y, and K, mechanical correction is performed primarily using the mechanical correction part 60. FIG. At this time, the mechanical correction is performed by rotating the adjusting bolt 65 to physically move the nozzle body 31b of each print nozzle 31C, 31M, 31Y, and 31K, as described with reference to FIG. 4 above. The injection holes 31a corresponding to each other are adjusted to some extent. At this time, since the adjustment of exactly matching the injection holes 31a corresponding to each other requires considerable effort and time, the basic physical position correction is basically performed.

Thereafter, it is preferable to perform software correction after completing the primary mechanical correction.

Software calibration can be done after the mechanical calibration has been completed or without any mechanical calibration.

A state of completion of the primary mechanical correction is set to the arrangement of the injection holes 31a of FIG. 8, and the software correction method of the present invention will be described with reference to FIG.

As shown in FIG. 8, with the injection holes 31a of the printing nozzles C, M, Y, and K being positioned, the injection holes 31a of the printing nozzles C, M, Y, and K are shown in FIG. 7. As shown in FIG. 2, alignment printing is performed on a print object by using uncorrected output data in a normal state. At this time, since the injection holes 31a corresponding to each other in each of the printing nozzles C, M, Y, and K do not exactly match each other, as shown in FIG. Problems occur, such as appearing sprayed in place.

Subsequently, at the same time as or after the alignment printing, the printed state as described above is measured by using the vision camera 40 and the input state is input to the correction output unit 50.

The correction output section 50 converts the image information input through the vision camera 40 into a digital signal, detects the print state, and converts the detected information into the print position correcting amount in the print reference correction section 53. If the amount of distortion is greater than or equal to a certain amount, the positions of the injection holes 31a corresponding to each other in each of the printing nozzles C, M, Y, and K are corrected and input to the output data correction unit 56.

The information input through the print data input unit 55 by the output data corrector 56 corrects the injection holes 31a corresponding to each other in each of the print nozzles C, M, Y, and K, as shown in FIG. Then, based on the corrected information, a drive signal is output to the driving units for printing and printed.

That is, as shown in FIG. 9, the H2 line (row) printing before correction is set to print by injecting ink through the two injection holes to be positioned on the H2 line for all of the print nozzles C, M, Y, and K. After the correction, the H2 line (row) printing is performed by the software correction method as described above. The C print nozzle has 2 injection holes 31a, the M print nozzle has 1 injection hole 31a, and the Y print nozzle has 2 The injection holes 31a and K print nozzles are combined with each other by injecting ink from the third injection hole 31a, thereby printing a specific point.

Therefore, after software-correcting the positions of the injection holes 31a of the respective printing nozzles C, M, Y, and K as described above, the entire printing nozzles C, M, Y, and K are moved laterally. When one-pass printing is performed while printing, the printing quality can be greatly improved since the ink is corrected to be printed while being accurately injected at a desired position including the specific line (for example, the H2 line in the above).

On the other hand, after correcting the position of the corresponding injection hole (31a) of each printing nozzle (C, M, Y, K) as shown in Figure 6 and repeatedly measured by the vision camera 40, if necessary, if the amount of distortion In this case, the printing can be implemented to perform normal printing. In this method, it is preferable to proceed with the method of photographing the printing state with the vision camera 40 together with the alignment printing and repeating the software correction several times.

On the other hand, when performing the software correction in the state as shown in Figure 8, for example, H-1 line, H0 line, Hn line, H1 + n line, etc., all the printing nozzles (C, M, Y, K, etc.) Normal printing is difficult because the combination of) is difficult, and these lines reset the 1-pass print area so that printing is performed with the exception of the 1-pass print area, and the output data is corrected to the reset print area range. When printing is performed, more accurate printing is possible in all areas. Of course, ink is not ejected from the injection holes 31a of the print nozzles C, M, Y, and K in the print area excluded from the one-pass print area.

Of course, when the positions of the corresponding injection holes 31a of each of the printing nozzles C, M, Y, and K exactly match each other, as shown in FIG. 7, all the printing lines are included (except H0 and Hn lines, if necessary). The 1-pass print area can be set as possible.

As described above, the technical ideas described in the embodiments of the present invention can be performed independently of each other, and can be implemented in combination with each other. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art. It is possible. Accordingly, the technical scope of the present invention should be determined by the appended claims.

1 is a schematic perspective view showing a conventional planar fixed type (flat type) inkjet printer,

2 is a schematic view showing a printing nozzle adjusting device in a conventional inkjet printer,

3 is a perspective view of an embodiment of an inkjet printer equipped with a printing correction device according to the present invention;

4 is a schematic configuration diagram showing a mechanical correction unit of the printing correction device according to the present invention;

5 is a block diagram showing a software correction unit of the print correction device according to the present invention;

6 is a flowchart illustrating a print correction method according to the present invention;

7 to 9 are views for explaining the print correction method according to the present invention,

7 is a view of the injection hole position when the printing position is optimal;

8 is a view of the injection hole position when the printing position is shifted;

9 is a reference table showing the injection hole readjustment state by correction when the printing position is changed as shown in FIG. 8.

Claims (8)

It has a plurality of print nozzles sequentially arranged in a print movement direction (lateral direction), and each print nozzle has 1, 2, 3,... a print head unit having n ejection holes, wherein the nth ejection hole of each print nozzle corresponds to each other in the transverse direction with the nth ejection hole of another print nozzle to combine colors and to print a plurality of colors; A measuring unit which measures a state printed on a printing object by using the print head unit; By using the measurement information of the measuring unit, the plurality of printing nozzles detect a misalignment state between the nth injection holes corresponding to each other, and perform correction to adjust the injection holes corresponding to each other between the printing nozzles. A correction output unit for outputting a print signal on the basis of The correction output unit may include: a print state detector configured to detect a difference in printing positions between the injection holes corresponding to each other in the print nozzles using the measurement information measured by the measurer; and a print nozzle detected by the print state detector. A printing reference correction unit for correcting printing reference information by readjusting the injection holes corresponding to each other according to the printing position difference between the injection holes corresponding to each other, and initial printing at the time of printing output according to the signal of the printing reference correction unit. And a drive signal output unit for outputting a signal input from the output data correction unit to an ink injection driver of each print nozzle. The method according to claim 1, And the measuring unit is a vision camera mounted to the print head unit to capture a printing state and input the printed state to the correction output unit when printing to a print object. delete The method according to claim 1, A software correction unit for readjusting the injection holes corresponding to each other using the correction output unit, And a mechanical corrector for physically adjusting the positions of the print nozzles to adjust the positions of the ejection holes corresponding to each other in the plurality of print nozzles. A print correction method using an ink jet printer provided with the print correction device according to claim 1, A first step of performing alignment printing on a printing object while moving the print head unit in a lateral direction; A second step of measuring a printing state of a printing object during or after performing the first step in the measuring unit; A third step of detecting, by the correction output unit, an amount of print position shift by using the information measured in the second step; And a fourth step of outputting and printing a print signal based on the correction signal by correcting the positions of the ejection holes corresponding to each of the print nozzles when the print position is shifted by a predetermined level or more as a result of the detection in the third step. A print correction method for an inkjet printer provided with a print correction device. The method of claim 5, Before the first step, the inkjet provided with a print correction device, characterized in that for performing a mechanical correction to physically adjust the position of each of the print nozzles to match the position of the corresponding injection holes in each of the print nozzles How to calibrate your printer's print. The method of claim 5, In the fourth step, the positions of the injection holes are corrected by resetting the injection holes of each print nozzle existing in the same print line in the printing movement direction of the print head unit to the injection holes corresponding to each other between the printing nozzles. A print calibration method of an inkjet printer equipped with a print calibration device. The method of claim 5, In the fourth step, if at least one of the injection holes corresponding to each other in each print nozzle does not exist in the same print line, the one-pass print area is removed with the exception of the printing line in which one or more injection holes do not exist. A print correction method of an inkjet printer with a print correction device, characterized in that to output a print signal by resetting.

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