Programmed control of EDM by means of microprocessors. An obsolete ten-n for capacitor Conductor A material that will carry electric current. The accumulation of debris in the dielectric fluid, causing a decrease in the fluid's dielectric strength. Coolant Sometimes used incorrectly to describe dielectric fluid. A graphite EDM electrode material infiltrated with copper.
Copper tungsten A porous tungsten material infiltrated with copper.
Core The slug that remains after EDMing with an electrode that has a flush hole in it. In EDM, the comers of the electrode wear the most. Comer wear is the distance up the electrode comers that show signs of wear. The small cavities left on the EDMed surface of the workpiece by the EDM sparks. Also known as pits.