JP-2026075529-A - printer

Abstract

[Problem] To provide a bidirectional adjustment pattern with higher visibility. [Solution] The printer prints a bidirectional adjustment pattern 200 on the recording medium 5 to correct the deviation in the ink landing position with respect to the scanning direction Y between forward printing, in which ink is ejected from the ink head while the ink head is moved in the Y1 direction, and return printing, in which ink is ejected from the ink head while the ink head is moved in the Y2 direction. The bidirectional adjustment pattern 200 includes a plurality of adjustment patterns 201, each with a different correction value set and arranged in the scanning direction Y. Each adjustment pattern 201 includes a baseline 203 extending in the nozzle alignment direction X and a diagonal line 204 that intersects the alignment direction X, and the baseline 203 and the diagonal line 204 are arranged in the alignment direction X. [Selection Diagram] Figure 6

Inventors

• 加藤 巧
• 森上 敬之

Assignees

• ローランドディー．ジー．株式会社

Dates

Publication Date

20260508

Application Date

20241022

Claims (6)

1. A support stand for supporting the recording medium, An ink head having a nozzle row in which a plurality of nozzles are arranged in a predetermined direction, each ejecting ink toward the recording medium supported on the support base, A moving device for moving the ink head in a scanning direction perpendicular to the aforementioned alignment direction, The system comprises a control device for controlling the ink head and the moving device, The control device is The system includes a pattern printing unit that controls the ink head and the moving device to print a bidirectional adjustment pattern on the recording medium for correcting the deviation in the ink landing position with respect to the scanning direction between forward printing, in which ink is ejected from the ink head while the ink head is moved to one side of the scanning direction, and return printing, in which ink is ejected from the ink head while the ink head is moved to the other side of the scanning direction. The aforementioned bidirectional adjustment pattern includes a plurality of adjustment patterns, each with a different correction value set, arranged in the scanning direction. Each adjustment pattern includes a baseline extending in the direction of alignment and a diagonal line intersecting the direction of alignment, wherein the baseline and the diagonal line are arranged in the direction of alignment. Printer.
2. The pattern printing unit prints the plurality of adjustment patterns by a pair of forward and return printing passes. The printer according to claim 1.
3. The length of each adjustment pattern in the direction of alignment is set to be less than or equal to the length of the nozzle row in the direction of alignment. The printer according to claim 1.
4. The pattern printing unit is When printing the baseline, ink is ejected from the first group of nozzles among the plurality of nozzles in the nozzle row. When printing the aforementioned diagonal lines, ink is ejected from a second group of nozzles located closer to the center in the nozzle row than the first group of nozzles in the same direction. The printer according to claim 1.
5. The pattern printing unit prints symbols representing the correction values of each adjustment pattern on the extension of the baseline or the extension of the diagonal line of each adjustment pattern. The printer according to claim 1.
6. The aforementioned diagonal lines intersect the baseline at an angle of 45° or less. The printer according to claim 1.

Description

This invention relates to a printer. Printers that form images on a recording medium using a bidirectional printing method, which includes forward printing (where ink is ejected from the ink head while it moves in one direction of scanning) and return printing (where ink is ejected from the ink head while it moves in the other direction of scanning), have been conventionally known. For example, Patent Document 1 discloses an inkjet printer comprising a carriage slidable along a guide rail extending in the main scanning direction, and a recording head mounted on the carriage, which ejects ink toward the recording medium at predetermined timings corresponding to image data during the reciprocating movement along the main scanning direction. The inkjet printer described in Patent Document 1 is configured to print an ink placement adjustment chart for adjusting the ink placement between the forward and return strokes. The adjustment of the ink placement between the forward and return strokes is performed by the user checking the ink placement adjustment chart. The ink placement adjustment chart contains a predetermined image pattern formed by ejecting ink during the forward and return strokes of the recording head, resulting in variously differing ink placements. Furthermore, Patent Document 1 discloses that in inkjet printers, the initial ink ejection velocity tends to decrease when there are more nozzles ejecting ink at the same time, compared to when there are fewer nozzles, due to the characteristics of the ink head, cable, or drive circuit. According to Patent Document 1, changes in the initial ink ejection velocity manifest as changes in the ink's landing position; therefore, the number of nozzles ejecting ink at the same time affects image quality. For this reason, the inkjet printer described in Patent Document 1 is configured to perform different landing position adjustments in Mode 1, where the number of nozzles ejecting ink at the same time is relatively large, and Mode 2, where the number of nozzles ejecting ink at the same time is relatively small. The inkjet printer described in Patent Document 1 prints a bullet impact position adjustment chart that combines an image pattern for "Mode 1," consisting of thin, straight lines parallel to the sub-scanning direction, and an image pattern for "Mode 2," consisting of thin, straight lines obliquely inclined to the sub-scanning direction. In this bullet impact position adjustment chart, the straight lines parallel to the sub-scanning direction and the oblique lines inclined to the sub-scanning direction are arranged to align with the main scanning direction. According to Patent Document 1, in adjusting the impact position in Mode 1, the user selects a chart in which the position of the straight line parallel to the sub-scanning direction in the forward path coincides with the position of the straight line parallel to the sub-scanning direction in the return path. In adjusting the impact position in Mode 2, the user selects a chart in which the position of the diagonal line in the forward path coincides with the position of the diagonal line in the return path. According to Patent Document 1, this allows for adjustment of the impact position deviation for each recording mode, optimizing the impact position in various images using different recording modes. Furthermore, Patent Document 1 states that this impact position adjustment chart allows for simultaneous viewing of charts for multiple recording modes, thus eliminating the waste of time and recording media required to output multiple impact position adjustment charts for each recording mode. Additionally, it is stated that this improves usability for the user, as they no longer need to be aware of multiple impact position adjustment charts for each recording mode. Japanese Patent Publication No. 2007-203490 This is a front view of a printer according to one embodiment.This is a bottom view of the carriage.This is a cross-sectional view of the vicinity of one nozzle of the ink head.This is a cross-sectional view of the ink head, cut along a plane extending in the sub-scanning direction.This is a block diagram of a printer.This is a schematic plan view of the bidirectional adjustment pattern.This is a flowchart for determining the correction value for bidirectional printing.These are schematic plan views of the outbound and return routes.This is a plan view showing three adjustment patterns arranged adjacent to each other.This is a schematic plan view of an adjustment pattern relating to another embodiment. The following describes embodiments of the inkjet printer (hereinafter referred to as "printer") according to the present invention, with reference to the drawings. The embodiments described herein are, of course, not intended to limit the present invention. Furthermore, the same reference numerals are used for components and parts that perform the same function, and redundant explanations are omitted