Slow Wire Cutting, also known as Low-Speed Wire Cutting, is a CNC machining center that uses continuously moving fine metal wire (referred to as electrode wire, usually copper wire) as the electrode to subject the workpiece to pulse spark discharge, generating temperatures above 6000 degrees Celsius, and eroding and cutting the metal into the desired workpiece shape. The principle of Slow Wire Cutting is the continuous discharge to remove metal due to the existing gap between the on-line electrode and the workpiece.