Wire Electrical Discharge Machining (WEDM), also known as slow wire cutting, is a CNC machining center that uses a continuously moving fine metal wire (referred to as electrode wire, usually copper wire) as an electrode to discharge a pulse spark at the workpiece, generating temperatures above 6000 degrees Celsius, and eroding and cutting the metal into the desired shape. The principle of slow wire cutting is the continuous discharge phenomenon that occurs between the electrode wire and the workpiece due to the presence of a gap.