Crane control method

Details Crane control method Crane control method

1987-07-09

1988-07-12

Peters, Jr., Joseph F.

Traversing hoists

With haul-in line

212147, 212161, B66C 1900

Patent

active

047564326

ABSTRACT:
A crane control method in which the parcels suspended from a rope is transversely carried by a trolley, the control being performed in an accelerating, a constant velocity travel, and a decelerating period separately, wherein the control is performed during said accelerating and decelerating only by turning on and off a predetermined accelerating and decelerating forces. More particularly, the control is performed by turning on and off the limit current value of the armature current through the motor. The present invention eliminates the necessity for feedback control by which a velocity pattern is followed.

REFERENCES:
patent: 3517830 (1970-06-01), Virkkala
patent: 3921818 (1975-11-01), Yamagishi
patent: 4512711 (1985-04-01), Ling et al.
patent: 4603783 (1986-08-01), Tax et al.

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