Microprocessor controlled dual channel closed loop controller for stepper motors used in servo systems

摘要

A controller for stepper motors used in servo systems is implemented for being controlled by a microprocessor via appropriate input/output circuitry. Upon application of discrete commands, the controller produces stepper motor drive signals at a predetermined rate in predetermined drive sequences for driving one motor and for concurrently driving one of a plurality of motors. Closed loop positioning of the stepper motors using digital position feedback is achieved, as is simultaneous manual control of the stepper motors utilizing a slew stick.