| 摘要 |
PURPOSE:To calculate a control amt. being the deviation of a gap between an image carrier to a developer carrier by fuzzy inference from the quantity of state of maximum copy density, air pressure, humidity, cumulative number of sheets of copy, fogging, etc., and to properly control the gap between the image carrier to the developer carrier. CONSTITUTION:The maximum copy density, atmospheric pressure and humidity are detected by sensers 109, 110, 111 respectively and the deviation of the gap between a photosensitive body drum and a development sleeve is calculated based on a membership function expressed by the fuzzy set of the state quantum and the control amt. stored in a ROM 102 and a fuzzy rule relating to the quantity of state with the control amt. qualitatively in a CPU 101, and the inference results of respective rules are synthesized and the inference value of the control amt. of the highest probability is decided. The inference value of the deviation of the gap obtained by the fuzzy inference is inputted to a motor drive circuit 108 as the control amt. and the drive motor 200 of a gap control means is rotated and the gap between the photosensitive body drum and the development drum is controlled to a proper interval. |
