Damping servo-motor control

Details Damping servo-motor control Damping servo-motor control

1990-07-26

1991-12-31

Skaggs, H. Grant

Sheet feeding or delivering

Feeding

By means to convey sheet

271198, 1985024, 355212, 346134, B65H 504

Patent

active

050765680

ABSTRACT:
A system for maintaining a uniform velocity of a belt which is driven on rollers. A first roller is provided with a first encoder which supplies a pulse train to a first control device which controls a first servomotor. The first servomotor drives the first roller which provides torque to the belt. A second roller is provided with a second encoder which supplies a pulse train to a second control device which controls a second servomotor for selectively dampening the second roller. When a variation in the speed of the belt is detected by the second control device a signal is sent from the second control device to the second servomotor. The second servomotor dampens any speed variations so that the belt maintains a constant speed at a location proximate to the second roller.

REFERENCES:
patent: 3998017 (1976-10-01), Kyhl
patent: 4318540 (1982-03-01), Paananen et al.
patent: 4457506 (1984-07-01), Ashbee et al.
patent: 4799981 (1989-01-01), Stone et al.
patent: 4819927 (1989-04-01), Noguchi et al.
patent: 4903954 (1990-02-01), Robertson et al.

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