Patent ID: 7460820
Filing Date: 2008-12-02
Classification: G03G

Abstract:
1. A drive control device for controlling a rotation speed of a rotatable member, comprising: a rotation drive member that drives the rotatable member; a plurality of objects to be detected provided in said rotatable member; a detector that detects the objects to be detected, which are rotating with rotation of said rotatable member, and outputs a detection signal; and a control part that detects an angular speed of said rotatable member in accordance with the detection signal, and controls a rotation speed of said rotation drive member, wherein said control part calculates an amount of error in intervals of said objects to be detected, controls the rotation speed of said rotation drive member in accordance with the amount of error, uses an average value of values calculated as said amount of error for a plurality of times and performs calculation of said amount of error for each half rotation of said rotation drive member.