| 摘要 |
An image forming apparatus includes an image bearing member, a developer bearing member, a conveying member circulating and conveying a developer, an executing portion which can make the image forming apparatus execute a first mode in which image formation is performed at a first image forming speed and a second mode in which image formation is performed at a second image forming speed lower than the first image forming speed, and a controlling portion which, in case that a mode is switched between the first mode and the second mode, gradually changes a target drive speed of the conveying member so that the drive speed of the conveying member is gradually changed from the drive speed of the conveying member in the mode before switching to the drive speed in a steady state in the mode after switching. |
