Feed control method of the electrical discharge machining and control method of the electrical discharge machining, as well as electro-discharge machining of the feed control device

摘要

PROBLEM TO BE SOLVED: To sufficiently utilize high responsiveness and a high control property at a high speed of a linear motor when the motor is used as a feed drive means of a main spindle and a quill of an electric discharge machine.;SOLUTION: A linear motor 10 is constituted together with a stator to feed and move a quill on which a machining electrode 6 is attached as a needle, and a linear travel position of the quill is detected to control the operation of the motor. In servo feed control, an output current to the linear motor is detected and feed back to output a torque command to a servo amplifier 28, and a speed detected by a position detection device 13 and a position signal generated by it are feed back and controlled to a PID servo algorithm part 29. Furthermore, a machining voltage is detected and passes through a low pass filter for A/D conversion to use an average value of sequentially obtained data as a machining clearance average voltage, input a deviation voltage between a servo reference voltage set in advance and it into a travel command dividing part 30 together with the position signal, a machining position command 31, and a speed command 32, and output a travel amount command into a PID part.;COPYRIGHT: (C)2000,JPO