抄録
Wire-break, which greatly harms machining performance, can be prevented by reducing the ma- chining energy. However, too much reducing the energy also harms machining speed. Thus control algorithm which brings minimum requirement for wire-break prevention is needed. In this paper, we clarify there exists energy limit that brings wire-break, and the limit changes according to two factors: the workpiece thickness and the flow of dielectric fluid. In addition, we propose the control algorithm for wire-break prevention, which detect these two factors automatically. It is also shown that this control algorithm brings much higher performance when these two factor change during machining.