Method and device for controlling a drive unit of a pile-lifting

Details Method and device for controlling a drive unit of a pile-lifting Method and device for controlling a drive unit of a pile-lifting

1991-06-27

1993-04-13

Skaggs, H. Grant

Sheet feeding or delivering

Feeding

Pack holders

271162, 414924, 414925, 388827, B65H 126

Patent

active

052015092

ABSTRACT:
A method of controlling a drive unit of a pile-lifting device located at a sheet-fed printing machine includes starting-up the drive unit with a first mode of operation selected by an electronic current wherein rated torque is high and rated speed is low for respectively lifting and lowering the pile and, after a given period of time, following the starting-up of the drive unit, switching to a second mode of operation of the drive unit wherein the rated torque is low and the rated speed is high if the speed has exceeded a preset value during a lifting of the pile, and has not exceeded a preset value during a lowering of the pile; and a device for performing the method.

REFERENCES:
patent: 4455115 (1984-06-01), Alger et al.
patent: 4466604 (1984-08-01), Kishimoto et al.
patent: 5123079 (1992-06-01), Tanii et al.
patent: 5123637 (1992-06-01), Musaka

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