JPS54158572A - Stopping winder in fixed position - Google Patents

Abstract

PURPOSE: To stop the rear end of a coiled material at a prescribed distance from the vertical center line of the coil, by stopping a winder when a circumferential length of the coil has become equal to a common prescribed circumferential length determined from the circumferential length of the coil calculated in consideration of the expected quantity of retarded displacement of the rear end.

CONSTITUTION: The horizontal distance L between a stop position target E and the vertical center line of the coil is determined. The circumferential length l₁ of the coil between the stop position target E and the bottom B of the coil 8, the expected quantity s of retarded displacement of the rear end after the application of a stop instruction and the circumferential length l₂ of the coil between the bottom B of the coil and a stop instruction application point P are calculated on the basis of prescribed formulae. The circumferential velocity V of the coil, the inside diameter d1 of the coil, the braking torque TB of a brake, the branking lag time to and the revolution speed ratio i between the winder and a motor are decided so that the circumferential length l₂ is almost constant for all coils. A circumferential length l₂', which is regarded as almost constant for the outer outside diameter d of all the coils, is determined from the circumferential length l₂. When the circumferential length l₂ has become the value l₂', the stop instruction is applied.

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