Feed roll wear compensation scheme

Details Feed roll wear compensation scheme Feed roll wear compensation scheme

1993-12-17

1994-08-30

Schacher, Richard A.

Sheet feeding or delivering

Feeding

Separators

271121, 271126, 271147, B65H 108, B65H 306

Patent

active

053420373

ABSTRACT:
A feed roll wear compensating method and apparatus measures the surface speed of the feed and nudger rolls that are rotated by a motor and adjusts the motor speed to prevent sheet damage from occurring. The surface speed of each of the rolls is measured by sensors that detect the position of a moving sheet and the signal from the sensors is used to deduce the reduction in diameter of the rolls due to wear. The roll wear information is used to adjust the nominal elevator height to maintain constant force on the sheets and to provide feedback for adaptive control of the feed motor to adjust the speed of the feed roll.

REFERENCES:
patent: 3866903 (1975-02-01), Eppe et al.
patent: 4331328 (1982-05-01), Fasig
patent: 4919412 (1990-04-01), Weigel
patent: 5121915 (1992-06-01), Duncan
patent: 5149077 (1992-09-01), Martin et al.
patent: 5186449 (1993-02-01), Ohmi
patent: 5195736 (1993-03-01), Ishidate
patent: 5197726 (1993-03-01), Nogami
patent: 5201508 (1993-04-01), Kuo

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