CNC stands for computer numerical control, and refers specifically to a computer "controller" that reads instructions and drives a machine tool, a powered mechanical device typically used to fabricate components by the selective removal of material. CNC does numerically directed interpolation of a cutting tool in the work envelope of a machine. The operating parameters of the CNC can be altered via a software load program. CNC Router considered to be lighter version of CNC milling Machine and/or CNC lathe or combination of both .The structure more often seen in Gantry style. In other way, CNC Router is a development on normal hand operated Router with computerized controlled movement of cutting tool with speed, feed and other machining parameters. The general application areas of CNC Router are furniture industry, architects / builders for interiors and prototyping, signage industries ,etc.. The materials commonly machined using CNC Router are all type of Natural and artificial wood, plastics, rubber, aluminium sheets, lime stone, marble, synthetic materials etc....and harder material like steel ,granite, brass etc.....for engraving only.