CONTROL METHOD OF HYDRAULIC PINCH ROLL AND CONTROL UNIT THEREOF

摘要

A control unit of hydraulic pinch rolls 1 comprises: position detectors 10c, 10d that detect position of right and left cylinder pistons 6c; an arithmetical unit 13 that calculates a difference of output 16c, 16d from the position detectors; a controller 14 that processes a calculated value to make correction output; and add-subtract units 18c, 18d that add/subtract the correction output from the controller such that the correction output 17 is added to an end portion of the pinch rolls having a wider gap in a direction to push the gap and the correction output of the same amount is subtracted from the opposite end portion, by which the set values of pressing force control provided for right and left independently are corrected. Thus, a defective winding shape can be suppressed.