Apparatus for controlling speed of photosensitive belt for electrophotography

Abstract

Abstract PURPOSE:To enable stable maintenance of the speed of a photosensitive belt at a set speed by comparing the moving speed of the belt obtd. by detecting the marks put onto said belt with a reference speed and controlling a driving motor according to the difference thereof. CONSTITUTION:A mark 10 for a pattern position and a mark of a pattern 11 for detecting speed are put on a photosensitive belt 1. The detecting signal of the mark 10 detected by a photosensor 2 is inputted to an arithmetic part 6 by which control is started. A photosensor 3 detects the pattern 11 and the detection signal thereof is converted to a voltage signal by an F/V conversion circuit 7. The voltage signal is inputted via an A/D conversion circuit 8 to an arithmetic part 6. The belt speed signal and a reference speed signal are compared in the part 6 and the revolution of the motor 4 is controlled according to the difference thereof. Therefore even if there is a deviation in the speed between the belt 1 and the motor 4, the difference is quickly corrected and the belt speed is stably maintained at the set speed.

Inventors

• 👤 Hiroshi Ishikawa
• 👤 宏 石川

Bibliographic Details