Microstepping motor controller circuit

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318685, 318696, 364400, G05B 1940, H02P 800

Patent

active

047348470

ABSTRACT:
A controller circuit for controlling the movement of a stepper motor or the like about one or more axes is disclosed. The circuit includes a microprocessor and associated circuitry for generating velocity and distance control signals according to a preferred method. According to the method, a constant acceleration number provided by the user is cumulatively added to itself to produce a velocity number. In addition, the velocity number is cumulatively added to itself to produce a pulse rate number. The pulse rate number is routed as a plural bit number to a counter wherein it is used to generate a train of stepper motor control pulses. The preferred method and circuitry allow the microprocessor to generate the stepper motor control pulses at a very high rate of speed without requiring peripheral adder circuitry.

REFERENCES:
patent: 3893616 (1975-07-01), Trousdale
patent: 4262336 (1981-04-01), Pritchard
patent: 4377847 (1983-03-01), Daniel et al.
patent: 4446412 (1984-05-01), Friedman et al.
patent: 4489259 (1984-12-01), White et al.
patent: 4535405 (1985-08-01), Hill et al.
patent: 4584512 (1986-04-01), Pritchard
Nordquist, Jack I., et al., "A Motion Control System for (Linear) Stepper Motors," Xynetics Products Div. of General Signal, Santa Clara, Calif.--17 pages.
"Motion Control and Pulse Sources," Compumotor Corporation, Petaluma, Calif., Applications Note 2--8 pages.

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