Apparatus and method for precise velocity control

摘要

An apparatus and method for precisely controlling a driven component (10) in an electromechanical system, particularly for controlling the speed of a photoreceptor or intermediate transfer belt in an electrophotographic printing machine. A sensor (160) monitors the speed of the driven belt (10) and generates and sends a signal indicative thereof to a controller (90). A second sensor monitors the rotational speed of the shaft (172) of the drive motor (170) and also generates a signal indicative thereof and sends that signal to the controller (90). The controller (90) processes the signals so that a preselected belt speed is maintained while minimizing or eliminating torque disturbances caused by the rapid fluctuation of the motor velocity without the necessity of using an inertial flywheel.