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Electrical discharge machining (EDM), also known as spark machining, spark eroding, burning, die sinking, wire burning or wire erosion, is a manufacturing process whereby a desired shape is obtained by using electrical discharges (sparks).[1] Material is removed from the workpiece by a series of rapidly recurring current discharges between two ...
How Wire EDM Works. Wire EDM machining (also known as spark EDM) works by creating an electrical discharge between the wire or electrode, & the workpiece. As the spark jumps across the gap, material is removed from both the workpiece & the electrode.