Electrical discharge machining, EDM (Electrical Discharge Machining), is a process of separating metals by an electric spark in a very short time with large voltage between the cutting tool and details.The principle of this method is to separate details bombardment of materials by thermal energy source so large was born when the two electrodes near each other. In this the two electrodes, a knife and a role as a workpiece during machining. The surface details are EDM machining can reach out = 0.63 µm when roughing and out = 0.12 µm when machining essential. Usually about Machining accuracy 0, 0,01 mm.
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