| 摘要 |
An image forming apparatus which forms an image on a sheet by using an image bearing member, the image forming apparatus includes a motor configured to rotate the image bearing member, a speed detection unit configured to detect a rotation speed of the motor or the image bearing member, a feedback control unit configured to supply the motor with a PWM signal which is acquired by performing a pulse width modulation on a feedback control value which is based on a target rotation speed, the rotation speed detected by the speed detection unit, and a feedback gain, and a gain updating unit configured to sample the PWM signal output from the feedback control unit during the image bearing member is in a steady rotation for an image forming operation and update the feedback gain based on the sampled PWM signal.
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