Electrical Discharge Machining is a common manufacturing process that uses electricity to create a desired shape or achieve the mirror finish requirements. The thermal energy is used to shape material, instead of direct contact machinings, such as CNC machining or grinding method.

However, only conductive material can be working in electrical discharge machining because the electrical interaction with the base material is necessary. The conductive material includes copper, steel, tungsten carbide, and titanium. The E.D.M process is particularly used in hard material machining or the complex parts that are difficult to be created by regular machining methods.

There are two typical EDM methods: Wire EDM and Sinker EDM. Although they’re working based on electricity discharging, their operating principle is significantly different. Wire EDM is known as the precision cutting process, it uses a single brass wire and computer direction to control the dimension and its accuracy. Wire EDM is considered a more efficient and cost-effective way. On the other hand, Sinker E.D.M uses preformed electrodes to create the desired shape, The working efficiency is lower compared with Wire EDM.