| 摘要 |
PROBLEM TO BE SOLVED: To print a color image with an excellent accuracy by correcting position shifting derived from irregular speed of a driving system, independent of a processing accuracy or the assembling accuracy. SOLUTION: In this printing device, a drum phase correcting section 140, on detecting a respective rotary position on plural photosensitive drums 32 by the drum position sensor, corrects rotary phase of respective drum so as to be uniformized to a specific phase, so that the transferring position based on this rotary detecting position as a reference with respect to the belt on the drum periphery becomes a specified relation for instance, becomes the same. The position-shift detecting section, on detecting the position-shift of the transfer image on a recording paper derived from the irregular speed of the driving system including the belt 12 the photosensitive drum 32, and based on the position-shift detected by the speed irregularity correcting section 175, corrects the position-shift of the transfer image with respect to the recording paper derived from the speed irregularity. |
