Fabrication of portable CNC Milling machine for wood

Computer Numeric Control is the automation of machine tools which are operated by Numerical commands. It enables better manufactured product by reducing the number of steps involved and time taken in manufacturing. The current work uses the codes available in CNC technology to control the machining variables on a self-built 2 ½ axis machine. 2 ½ axis implies the controlled motion is along 2 axes (X and Y) and along motion of tool spindle that moves in the Z (depth). The position of the tool is driven by direct-drive stepper motor in order to provide highly accurate movements. Machine is built on a dimensionally stable platform and the parts on which machining is performed are bolted using clamps and bolts. Finally, using the open source Arduino interface and CNC shield this machine is brought to life. The scope of the current work aims to present a working model of the CNC machine which can be used for light drilling, milling operations on pieces of wood.