Patent ID: 7076181

Claim:
A method of maintaining a surface voltage on a photoreceptor within a predetermined operational voltage range, the method comprising the steps of: providing a charging device adjacent to an outer surface of the photoreceptor; determining a reference voltage to be applied by the charging device to the photoreceptor outer surface to establish a first photoreceptor surface voltage that is within the predetermined operational voltage range; applying the reference voltage to the outer surface of the moving photoreceptor with the charging device while measuring a first photoreceptor current; comparing the first photoreceptor current to predetermined characteristics of the photoreceptor to calculate a first output value; comparing the first output value to predetermined characteristics of the photoreceptor and calculating a first correction voltage to be applied by the charging device; and applying the first correction voltage to the photoreceptor outer surface with the charging device to obtain a surface voltage on the photoreceptor that is within the predetermined operational voltage range.