Wire breakage prevention device of wire curl electric discharge machine

摘要

A teaching pendant (1) for sending a jog command to an NC control device, a teaching pendant for teaching a jog command from a teach pendant An NC control device 2 for outputting X, Y axis feed commands and X and Y axis stop and retreat commands and outputting a signal for controlling the contact detection automatic means, and a workpiece X, Y Axis motor 3 and the Y-axis motor 4 which are connected to the machining power supply 20 and the upper and lower feeders 11 and 15 for feeding the axes, A contact detecting means actuating means (22) for actuating the contact detecting means actuating means, and contact detecting means (23) connected to the output side of the contact detecting means actuating means and for sending the contact detecting signal to the NC control device.