Wire-cut electric discharge machine and electric discharge machining method

摘要

In wire-cut electric discharge machining, a relative feeding speed of a wire electrode with respect to a workpiece is controlled based on an average voltage in a machining gap during machining. A correction coefficient is calculated based on acquired workpiece size information, and the average machining-gap voltage is corrected by multiplying the average machining-gap voltage during machining by the calculated correct coefficient. The relative feeding speed of the wire electrode with respect to the workpiece is controlled based on the corrected average machining-gap voltage.