Computer numerical control is an advanced form of soft automation developed to control the motion and operation of machine tools. Numerical control machine was invented around in 19th century to reduce work load, it is a method in which the manufacturing machine uses coded format, digits and letters. Its advantages include high efficiency, high flexibility, high production rate, low cost of production, less working time and less losses in production. It includes three main steps that is receiving data, interpreting data and accordingly control action. Based on special characters letter codes and numbers a form of program called part program (a sequential instruction or coded commands that direct specific machine function) is used for automatical operation of a manufacturing machine to produce a specific part of specific dimension. The program is then converted in to electrical signal to feed as input to motors that run the machine and do the tool movements. A machine control unit (MCU) decides the tool depth of cut, cutting speed etc. Motion of tool is based on Right hand coordinate system [1]. Three axis of rotation x, y, z for three dimensional motion of tool plus an axis of rotation. The z-axis is one of the three which allows the movement of router in up and down direction. This axis is very important because it controls the depth. The y-axis functions as motor mount to move z-axis in addition with slide mechanism, x-axis uses two pieces one for front and one for back which serves as height stands.