Taper cutting control unit for wire-cut, electric discharge machine

Abstract

The present invention is intended to improve the accuracy of taper cutting by a wire-cut, electric discharge machine. Path data and parameters necessary for taper cutting are punched in a paper tape (PTP). The path data read out by a tape reader (TR) is decoded by a decoder (DEC) and then provided to a register (REG). The parameters for taper cutting are decoded by the decoder and then applied to a correction circuit (CPS). The correction circuit (CPS) corrects the parameters on the basis of the sum (.delta..sub.1 +.delta..sub.2) of a first deviation (.delta..sub.1) of the wire electrode supporting point on each guide which is caused by a curved configuration of its guideway and a second deviation (.delta..sub.2) of the supporting point which is caused by the fact that the wire electrodes does not exactly conform to the geometrical configuration of the guideway. The second deviation corrects for the elasticity of the wire. The parameters thus corrected are provided to a register (PAR). A processing unit (WCP) effects known taper cutting control according to the stored data of the registers (REG, PAR).

Dependencies are inferred from the claim text.