Drive control device and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorShouji Okabe
Life of this patent
Estimating the term…
Abstract
A drive control device controls a rotation speed of a rotatable member. A rotation drive member drives the rotatable member. A plurality of objects to be detected are provided in the rotatable member. A detector detects the objects to be detected, which are rotating with rotation of the rotatable member, and outputs a detection signal. A control part detects an angular speed of the rotatable member in accordance with the detection signal, and controls a rotation speed of the rotation drive member. The control part calculates an amount of error in intervals of the objects to be detected, and controls the rotation speed of the rotation drive member in accordance with the amount of error.
Claims9
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.
An image forming apparatus comprising:
- an intermediate transfer belt that is a rotatable endless belt and onto which a toner image is transferred as a primary transfer image;
- a drive roller that drives the intermediate transfer belt;
- a driven roller that rotates with movement of said intermediate transfer belt;
- a plurality of objects to be detected that rotate together with the driven roller;
- and
- a detector that detects the objects to be detected and outputs a detection signal, wherein
- said image forming apparatus transfers said primary transfer image that has been transferred onto said intermediate transfer belt onto a recording medium so as to form a secondary transfer image on said recording medium,
- said image forming apparatus further comprising a control part that detects an angular speed of said driven roller in accordance with said detection signal and controls a rotation speed of said drive roller in accordance with the angular speed,
- said control part calculating an amount of error in intervals of said objects to be detected, the calculation of the amount of error being performed for each half rotation of said drive roller so as to control a rotation speed of said drive roller in accordance with the amount of error.
Dependencies are inferred from the claim text.