Forming Electrodes For EDM, electrodes must be tooled according to the processing shape. In this method, the spindle is held using a V-shaped bearing made of ceramic constructed to support the spindle's outer diameter on the processing machine, making it possible to rotate the spindle very accurately. Precise handling of electrodes can be easily done and control of the dimensions becomes possible, so that hole diameter and circularity of hole shape can be very precisely achieved. This method was developed to produce electrodes by using the electro-discharge principle to machine the electrode material itself. WEDG is characterized by a wire being fed around a wire guide support and back into a take-up spool.
Processing takes place at the apex of the supported wire.
New wire surfaces are fed continually, therefore attrition of the wire at the processing point is avoided and high-precision electrode processing can be achieved.