Arrangement for controlling the travel of two hydraulic cylinder

Details Arrangement for controlling the travel of two hydraulic cylinder Arrangement for controlling the travel of two hydraulic cylinder

1988-08-08

1989-08-29

Garrett, Robert E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

91459, 198807, 242 571, F15B 903, F15B 909

Patent

active

048606340

ABSTRACT:
For setting and guiding a band running round two rolls the bearings of the roll on either side are each adjustable by a hydraulic or lifting cylinder. Each hydraulic cylinder comprises a position control circuit. The position desired value applied jointly to the position control circuits is varied by a tension-dependent control in such a manner that in the position adjustment a maximum admissible tension force is not exceeded. Furthermore, the position desired value has superimposed thereon a correction control by which the center setting of the band is monitored. The arrangement is preferably provided for positioning and tension-dependent adjustment of the encircling metal band of a sheet casting apparatus.

REFERENCES:
patent: 2914957 (1959-12-01), Johnson
patent: 3543642 (1969-05-01), Seamone
patent: 3739158 (1973-06-01), Woodward
patent: 4700610 (1987-10-01), Bauer et al.
patent: 4712470 (1987-12-01), Schmitz

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