| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of preventing color shift caused by errors in determining a period when each of photoconductors 1Y, M and C contacts/separates from an intermediate transfer belt 8, without the need for a home position sensor that incurs increased cost. SOLUTION: A control unit of the belt driving device is configured to, during a succeeding rotation of an intermediate transfer belt 8 performed after a contact-state-changing rotation in which the number of photoconductors contacting the intermediate transfer belt 8 has changed, control the driving speed of a belt driving motor based on a period of the intermediate transfer belt 8 determined in the rotation immediately before the contact-state-changing rotation, instead of a period determined in the contact-state-changing rotation. COPYRIGHT: (C)2010,JPO&INPIT
|
