Image forming apparatus which controls fixing drive motor according to pressure roller diameter

摘要

An image forming apparatus includes a fixing device, a motor, and a control device. The fixing device includes a heating member, a drive roller in contact with the heating member at a nip portion therebetween, and a memory configured to store an outer diameter of the drive roller. The motor is configured to drive the drive roller. The control device is configured to read the outer diameter from the memory, adjust a rotation speed of the motor such that the rotation speed of the motor becomes smaller as the outer diameter read from the memory becomes larger, and drive the motor at an adjusted rotation speed.

主权项

1. An image forming apparatus comprising:
a fixing device comprising:
a heating member;a drive roller in contact with the heating member at a nip portion therebetween; anda memory configured to store an outer diameter of the drive roller and a heat capability of the heating member; a motor configured to drive the drive roller; and a control device configured to:
read the outer diameter and the heating capability from the memory;adjust a rotation speed of the motor such that the rotation speed of the motor becomes smaller as the outer diameter read from the memory becomes larger and such that the rotation speed becomes smaller as the heating capability read from the memory becomes larger; anddrive the motor at an adjusted rotation speed.