Patent ID: 6501931
Filing Date: 2002-12-31
Classification: G03G

Abstract:
An image forming apparatus, comprising:a first motor for rotating a photosensitive member at a predetermined speed; a second motor for transferring a transfer medium onto which the toner image formed on the photosensitive member is transferred at a speed equal to the moving speed of the photosensitive member; a third motor for supplying the transfer medium toward the photosensitive member at a predetermined speed; a driving device supplying driving signals to the first, second and third motors; a detecting mechanism for detecting the occurrence of a phenomenon for changing the magnitude of the driving signals supplied from the driving device to the first, second and third motors wherein said detecting mechanism detects at least one amplitude of a motor current flowing through the first, second and third motors, an input device for changing the magnitude of the driving signals supplied from the driving device to the first, second and third motors on the basis of the occurrence of the phenomenon detected by the detecting mechanism, and a compensation condition setting mechanism for outputting the difference of at least one of a first, second and third error fluctuations when compensation constants of the motor driving currents supplied to the first, second and third motors are successively changed by said driving device.