Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1974-07-01
1976-10-12
Scott, James R.
Electricity: motive power systems
Open-loop stepping motor control systems
178 23R, 318695, G05B 1940
Patent
active
039860949
ABSTRACT:
A logic system for controlled energization of predetermined stepper motor phases for various optimal times employing a read only memory having a plurality of memory element arrays corresponding to predetermined stepper motor sequencing commands corresponding to all possible tilt position change attempts for a print head. The memory element arrays are addressed by a shift register which stores data representative of the previous print head tilt position and the destined print head tilt position as provided by a two bit latch. The addressed memory element array is sequenced by a counter incrementing the read only memory address provided by the shift register at various predetermined optimal time intervals provided by a timer which is preset by individual preset values stored in the memory element now being addressed.
REFERENCES:
patent: 3789971 (1974-02-01), Deyesso et al.
patent: 3801891 (1974-04-01), Davenport
patent: 3816656 (1974-06-01), Ludwig
patent: 3843917 (1974-10-01), Hoffman
IBM Technical Disclosure Bulletin, J. Mako, "Feedback Control of Torque of a Stepper Motor," vol. 16, No. 1, June 1973, pp. 246-248.
IBM Technical Disclosure Bulletin, G. J. Dohanich, Jr., "Digital Acceleration-Position Control of DC Motor," vol. 14, No. 6, Nov. 1971, pp. 1918-1919.
IBM Technical Disclosure Bulletin, D. G. Abraham et al., "Stepping Motor Control System," vol. 14, No. 9, Feb. 1972, pp. 2840-2841.
IBM Technical Disclosure Bulletin, R. A. McSparran, "Stepping Motor Control," vol. 16, No. 9, Feb. 1974, pp. 2859-2862.
Eldert Cornelius
Quioque Virgilio J.
Worst John L.
Burroughs Corporation
Redman Leon E.
Scott James R.
Taylor Ronald L.
Uren Edwin W.
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