| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize a configuration for inputting speed change at the same timing respectively to a photoreceptor drum 608y and a drive roller 604 of an intermediate transfer belt 606 in a test mode in order to perform feed-forward control, and still reducing influence on respective detection results. <P>SOLUTION: In a test mode, a difference between the average rotation speed of a peripheral surface of a photoreceptor drum 608y and the average rotation speed of a peripheral surface of an intermediate transfer belt 606 is made larger than that during image formation. Accordingly, a slip occurs at a contact portion; and therefore influence on respective detection results can be reduced even though speed change is respectively input. <P>COPYRIGHT: (C)2013,JPO&INPIT |
