Stepping motor control circuit

Details Stepping motor control circuit Stepping motor control circuit

1991-10-16

1992-12-29

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

H02P 800

Patent

active

051754827

ABSTRACT:
A stepping motor control circuit (50) has a step circuit (51) and a track circuit (52). The track circuit has an up-down counter (1) including an offset circuit (11), and a decoder (2). The offset circuit speeds up the change over from the first digit to the second digit in an up-down counter, when a two-phase excitation system is selected for the stepping motor. The speed-up is by a half period, or so, in terms of the output of the first digit in the up-counting mode or down-counting mode. Therefore, in either of the up-counting or down-counting modes, the excitation output starts to change at the first clock pulse input after the counting direction has been changed. Thus, the operation speed of the control circuit can be improved. Also, the information on the completion of the track operation can be immediately sent to a host device.

REFERENCES:
patent: 4803415 (1989-02-01), Sepesy
patent: 5001410 (1991-03-01), Ono

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