| 摘要 |
<p>An image forming apparatus comprises a movable optical system (28) for reading an original image, a motor (61) for driving the optical system, a motor driving circuit (70), an encoder (62) which outputs signals responsive to velocities of the motor (61), a control circuit (69) which controls the motor driving circuit (70) such that the optical system (28) starts from a home position and turns at a predetermined point to return again to the home position, and applies braking to the motor (61) when the optical system (28) is stopped at the home position, and a microcomputer for deciding timing to apply braking in response to an output of the encoder. By deciding brake timing in response to the output of the encoder, the optical system can be stopped accurately at the home position even when a moving load is increased abnormally due to stains on component members of a running path (45, 59) for the optical system, or replacement of the optical system (28).</p> |
