| 摘要 |
An image forming apparatus which forms toner images of different colors by at least one image forming device with a rotatably driven image bearing member, and forms a picture by transferring the different colored toner images formed by the image forming device onto an image transfer medium supported on a rotatably driven endless bearing member, or directly onto the endless bearing member, the image forming apparatus wherein a latent image writing position on the image bearing member being angularly spaced by approximately 180 DEG from an image transfer position including: a pattern detecting mechanism for detecting a color misregistration detecting pattern formed on the endless bearing member; and a drive control mechanism for individually controlling rotation speeds of rotary members, such as the image bearing member and the endless bearing member, so as to suppress a periodical rotation variation by using detecting information of a vibration component on the periodical rotation variation, which is obtained from detecting signals derived from the pattern detecting mechanism.
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