Patent ID: 6721621
Filing Date: 2004-04-13
Classification: B23H

Abstract:
A numerical controller for a wire electrical discharge machine producing electrical discharge between a wire electrode and a workpiece and finishing the workpiece a plurality of times from rough machining to finish machining on the basis of a predetermined machining program, said numerical controller comprising:machining controlling means for determining and controlling a machining speed of the wire electrode in accordance with a discharge gap between the workpiece and the wire electrode or a state of electrical discharge; machining-state detecting means for detecting machining-state detection information including a working voltage for each movement of a predetermined distance in a process of execution of machining based on the machining program; information-record storing means for correlating the machining-state detection information detected by said machining-state detecting means, the machining speed generated by said machining controlling means, and machining position information for each movement of the predetermined distance, and for storing them in a storage device as machining-state detection information records; information-record reading means for reading the stored machining-state detection information records from said storage device; and two-dimensional graph displaying means for giving a graphic display by using the machining-state detection information and the machining speed, which are the machining-state detection information records thus read, as elements of one of two axes of a two-dimensional graph and by using the machining position information of the machining program as an element of the other axis thereof.