This paper addresses the further developing and utilizing about the functions of EDM machine tool on the basis of researching the numerical controls of EDM machine tool itself. Experiments of testing critical gap distances, single pulse discharges and single pulse discharge gap distances have been performed by the machine tool without any extra help of auxiliary instruments or equipments. The measuring accuracy and repeated testing accuracy is the numerically controlled displacement precision of the machine tool itself. The development of this function would have a great impact on enlarging the utilizations of EDM machine tools, on evaluating the behavior of EDM effectively and on designing the jumping displacement of electrodes reasonably.
EDMcritical gap distancesingle pulse dischargesingle pulse discharge gap distance