Patent ID: 9150379
Filing Date: 2015-10-06
Classification: B23H,B65H

Abstract:
1. A wire travelling device that travels a stretched wire between a wire feed roller and a wire collection roller, the wire travelling device comprising: a speed-instruction generation unit that, in changing a traveling speed of the wire, generates a speed instruction value for one of the wire feed roller and the wire collection roller, then generates a speed instruction value for the other roller so that a difference with respect to the other roller of the two rollers is a circumferential speed difference between a circumferential speed of the wire feed roller and a circumferential speed of the wire collection roller, and outputs each of the generated speed instruction values to the wire feed roller and the wire collection roller; a circumferential-speed calculation unit that calculates each circumferential speed of the wire feed roller and the wire collection roller based on feedback information from the wire feed roller and the wire collection roller; and a circumferential-speed-difference holding unit that calculates and holds the circumferential speed difference during a time from when the changing of the traveling speed of the wire is started until the changing thereof is completed, wherein the speed-instruction generation unit generates a speed instruction value for one of the wire feed roller and the wire collection roller so that the difference with respect to the other roller of the two rollers is the circumferential speed difference held in the circumferential-speed difference holding unit immediately before the changing of the traveling speed of the wire is started.