| 摘要 |
A toner content control apparatus senses the toner content of developer in a developer station, and performs toner content control by replenishing the consumed toner in the developer station according to the result of a comparison between the sensed toner content and the predesignated standard value. The toner content control apparatus of the present invention is realized by providing a toner content sensor having a sensitivity control circuit. A controller, when the developer is changed, determines an optimum sensor sensitivity control data with which the sensor gives an optimum sensitivity. The controller outputs sensor sensitivity control data to the sensitivity control circuit and updates the sensor sensitivity control data by reducing or increasing the data by a correction value according to whether the difference between the output data of the sensor and the predesignated reference value is positive or not. The controller also determines an optimum sensor sensitivity control data by using the updated sensor sensitivity control data and by halving the correction value until the difference comes within the predesignated allowable error. The controller also performs toner content control with the determined sensitivity control data set in the sensitivity control circuit.
|
