Electrical Discharge Machining Performance of Linear Motor Equipped Die-Sinking EDM

This paper reports on the improvement in the machining performance of quick response and higher speed in the linear motor servo-equipped Die-sinking EDM. The linear motor system allows the motor itself to move, so the travel distance measured by the linear scale is directly sent back to the motor. It enables a simpler control mechanism without the effect of backlash. Since the electrode is directly installed at the motor itself, the movement of both the electrode and the motor can be regarded as a one-piece body's movement. Because of these characteristics, even in the machining systems based on the voltage feedback of the electrical discharge gaps, an excellent follow-up and a quick response are possible as well as a higher and consistent accuracy at higher speed.