Bert Kortegaard

US Patent:

46895418, Aug 25, 1987

Filed:

Jul 22, 1986

Appl. No.:

6/888313

Inventors:

Rollin G. Jones - Los Alamos NM
Bert L. Kortegaard - Los Alamos NM
David F. Jones - Los Alamos NM

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

H02P 800

US Classification:

318696

Abstract:

A method and apparatus are provided for simultaneously controlling a plurality of stepper motors. Addressing circuitry generates address data for each motor in a periodic address sequence. Memory circuits respond to the address data for each motor by accessing a corresponding memory location containing a first operational data set functionally related to a direction for moving the motor, speed data, and rate of speed change. First logic circuits respond to the first data set to generate a motor step command. Second logic circuits respond to the command from the first logic circuits to generate a third data set for replacing the first data set in memory with a current operational motor status, which becomes the first data set when the motor is next addressed.