| 摘要 |
PROBLEM TO BE SOLVED: To accurately correct ejection timing of eject ink droplets in an inkjet printer of a two-way printing system. SOLUTION: The device includes: a correction pattern printing part 11 that prints a first correction pattern in a forward path and a second correction pattern in a return path; a deviation detection part 12 that detects deviation of a printing position of the second correction pattern with respect to a printing position of the first correction pattern; and an ejection timing correction part 13 that corrects the ejection timing to eject the ink droplet in the forward path and the return path of a head unit 6. When the second correction pattern is printed to approach to the first correction pattern stepwise from a front side to the other side in a main scanning direction A, the ejection timing correction part 13 sets the ejection timing in which the deviation of the printing position is not detected by the deviation detection part 12 as a first correction value and a second correction value, and sets an average of the first correction value and the second correction value as a correction value of the ejection timing. COPYRIGHT: (C)2011,JPO&INPIT
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