APPARATUS FOR CONTROLLING THE VELOCITY OF A MEMBER IN A DIGITAL PRINTING SYSTEM

摘要

TITLE APPARATUS FOR CONTROLLING THE VELOCITY OF MEMBER IN A DIGITAL PRINTING SYSTEM A control system for controlling the velocity of a member in a printing system which utilizes a signal representative of the time variation in intensity produced by the Doppler shift between radiation reflected from the moving member and a reference signal to generate a control signal for correcting the velocity of the moving member. The control signal is applied to a servo mechanism to modify the velocity of the moving member in the appropriate manner.