ELEKTRODENDRAHTZUFUHREINRICHTUNG IN EINER ELEKTRISCHEN DRAHTSCHNEIDE- UND ENTLADUNGSMASCHINE

摘要

In a wire electrode supplying device, a contact detector detects when a wire electrode supplied through a wire guide is brought into contact with the upper surface of a workpice, to output a detection signal, and in response to the detection signal, a control unit operates to suspend the supplying of the wire electrode and to insert it into a machining start hole formed in the workpiece while binding it with a jet stream, whereby the wire electrode is positively inserted into the machining start hole even when the wire guide is remote from the workpiece.