The spark erosion or forming EDMs are available in table sizes of 600mm x 350mm, 700mm x 420mm, 800mm x 500mm and 1100mm x 650 mm. The machines have a maximum processing speed of 400 mm3 / min. The optimal roughness obtained is 0.4 µm. The machine is suitable for processing conductive metal molds, complicated metal parts and templates having high toughness which require high precision but\ have difficulty in processing. |