Adjust setting method and the determination of the filter of tension control circuit and method thereof, and wire electrode tension control device of wire electric discharge machine

摘要

PROBLEM TO BE SOLVED: To perform safer tension control for a wire electrode by interpolating a notch filter using each tension fluctuation resonance frequency of each wire electrode tension suspending traveling system as each cut-off frequency in a tension control circuit from a tension detecting signal to a speed command input to a servo driver. ;SOLUTION: While the tension suspending traveling route length of a wire electrode is set to a minimum value, a tension detecting signal TM is detected to generate a tension compensating signal TC, the speed command of a servo driver is updated based on a new speed command SC compensating for a reference speed command signal by a compensating signal to set the state traveling while the wire electrode is tension-controlled, and the tension detecting signal TM is repeated fetched in a filter coefficient calculation controller 47. Then, amplitude for each frequency is calculated, the coefficient of the notch filter is calculated based on a frequency component having largest amplitude, and the filter coefficient is outputted to the notch filter 2 and then adjusted.;COPYRIGHT: (C)1999,JPO