| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the following problem that it is impossible for an image forming apparatus to increase an uneven rotation control region, and also, it is impossible for the apparatus to cope with an environmental change and a secular change, then, image quality is deteriorated. <P>SOLUTION: The uneven rotation correcting device is provided with a main motor 5 for rotary-driving a rotating body 1, a fluctuation correction motor 7, a rotational fluctuation detection means 2 for detecting the rotational fluctuation of the rotating body 7, a control value deciding means 4 for deciding a control command value for the main motor 5 based on the detection result of the means 2, and an uneven rotation calculating means 2 for detecting the amplitude and phase of a prescribed frequency from the control command value and deciding the correction quantity for the control command value, and a driving means 4 for detecting the amplitude and phase of the prescribed frequency from the control command value and driving the main motor 5 and the motor 7, and the correction quantity decided by the means 2 is added to the control command value, and then, the rotation of the rotating body 1 is controlled. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
