A unit specifically designed for laboratory use, it operates on a work bench or desk top from a conventional 13amp power supply. All metallic samples may be drilled, trepanned, wire sliced or slotted. The Mk 3 includes many new features regarding sample adjustment, power, access and safety. The Spark Erosion Machine has X-Y micrometer positioning for the electrodes and servo control of the machining process. It is supplied as a "ready to use" system comprising water deioniser, dielectric pump, small