Stepping motor control circuit

Details Stepping motor control circuit Stepping motor control circuit

1980-07-14

1982-12-07

Truhe, J. V.

Electricity: motive power systems

Positional servo systems

Digital or numerical systems

364900, 318696, G05B 1928

Patent

active

043629792

ABSTRACT:
Disclosed is a stepping motor control utilizing a microprocessor. The control is suitable for driving one or more stepping motors one at a time or in unison. In the illustrated embodiment when plural motors are driven together they are driven at the same rate or at rates in a fixed proportion to one another although several of the features of the invention are suitable for use in circuits providing contouring control; i.e., where separate motors are driven at separate stepping rates proportional to the relative distances each is to traverse for a single movement. An acceleration/deceleration circuit is utilized which provides simple yet highly accurate and efficient control of the stepping motors. Feed rate compensation for simultaneous drive of two motors is provided. Also a means is provided to allow stepping rates in excess of the counting rate capability of the microprocessor.

REFERENCES:
patent: 4086470 (1978-04-01), Ashbee

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