Coarse/fine sheeter controls in particular and machine drive sys

Details Coarse/fine sheeter controls in particular and machine drive sys Coarse/fine sheeter controls in particular and machine drive sys

1974-11-15

1976-09-28

Rubinson, Gene Z.

Electricity: motive power systems

Positional servo systems

Multiple mode systems

318624, G05F 146, G05B 702

Patent

active

039834670

ABSTRACT:
A machine drive system includes two motors which are to be driven with a selected velocity ratio. To one of these motors a coarse control is applied, and which the velocity ratio approximates the desired value, a fine control is applied to the other motor. The system may be hydraulic or electric. The hydraulic version employs a single pump to drive the two motors, and the fine control is conveniently a valve in a fluid line bypass around the associated motor. An error signal obtained from a comparison of the two speeds is used to govern the coarse/fine control.

REFERENCES:
patent: 1539187 (1925-05-01), Hewlett et al.
patent: 2697190 (1954-12-01), Andersson
patent: 2751535 (1956-06-01), Kuhnel
patent: 2798992 (1957-01-01), Adler et al.
patent: 3323030 (1967-05-01), Inaba et al.
patent: 3441818 (1969-04-01), Tiskus et al.
patent: 3688642 (1972-09-01), Negoro
patent: 3775837 (1973-12-01), Tomita et al.

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