Electrical discharge machining (EDM) is a machining process that discharges electric sparks from two electrodes on a metal sheet to detach the desired shape. Also called spark machining, it employs spark application techniques for cutting metal. Amid the many types of EDM, wire and sinker have gained more traction.

In the past decade, Wire EDM has grown significantly. The tool electrode in wire EDM is a wire. The technique used here is to wind wire between the two spools. The machine's motion causes the active part of the wire to switch continuously to produce sparks, which prevents the metal from corroding itself.