Microprocessor - controlled positioning system

Details Microprocessor - controlled positioning system Microprocessor - controlled positioning system

G - Physics

06

K

197/42

G06K 15/00 (2006.01) B41J 11/44 (2006.01) G05B 19/23 (2006.01)

Patent

CA 1221933

ABSTRACT OF THE DISCLOSURE A positioning, system for a line printer uses dc servomotors for driving a forms feed mechanism in increments of one or more line spaces at a time. The system includes a microprocessor and a position counter that counts either 1/4 or 1 degree displacement pulses generated by a motion indicating means including optical transducers and an emitter disk coupled to the motors. The motion indicating means includes an error hold and compensation counter that counts and stores 1/4 degree pulse generated during error movement of the motors relative to a stop position during the uncontrolled state and supplies a corrected 1 degree pulse to the position counter upon start up.

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