| 摘要 |
<p>In an image forming apparatus, an image forming unit includes a movable member (5) that is rotationally driven by a driving unit (7). A moving distance or a moving speed of the movable member is detected. The driving unit (7) is controlled based on a quantity of control. An occurrence of a detection error or a control error is determined based on the moving distance, the moving speed, or the quantity of control. A predetermined error process is executed if an error occurs. <IMAGE></p> |
