Two speed step motor driving apparatus for copying machines

Details Two speed step motor driving apparatus for copying machines Two speed step motor driving apparatus for copying machines

1983-12-02

1985-09-10

Shoop, William M.

Electricity: motive power systems

Open-loop stepping motor control systems

355 8, G05B 1940

Patent

active

045409277

ABSTRACT:
A pulse motor driving apparatus for the optical unit in a copying machine includes an excitation phase designating circuit for designating phase windings alternately from one phase to two phases and from two phases to one phase at the time of original scanning or forward rotation, and also designating the phase windings in pairs with every two phases at the time of return of the optical unit or reverse rotation. A drive circuit supplies drive pulses successively to the phase windings designated by the excitation phase designating circuit to rotate a pulse motor faster at the time of reverse rotation than at the time of forward rotation.

REFERENCES:
patent: 3746958 (1973-07-01), Leenhouts
patent: 4153866 (1979-05-01), Leenhouts
patent: 4221001 (1980-09-01), Heeren
IBM Technical Disclosure Bulletin, vol. 14, No. 8, pp. 2443-2446, Jan. 1972.
Ibid, vol. 15, No. 3, pp. 930-931, Aug. 1972.
Ibid, vol. 16, No. 9, pp. 2859-2862, Feb. 1974.
Ibid, vol. 17, No. 9, pp. 2630-2631, Feb. 1975.

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