CNC Plastic Machining and CNC MillingComputer Numerical Control, or CNC, uses a computer to make a numerical conversation of any design produced by Computer Aided Design software, or CAD. The numbers are like coordinates of a graph which controls the cutter along three axes, X, Y, and Z. The software instructs the computer (in a language called G-code), and the computer controls the cutting.
Unlike 3D printing, instead of adding material to the resulting piece, CNC milling removes material from a block and leaves only the desired piece; like sculpting by computer.
CNC milling is the most common form of CNC plastic machining, as it performs the functions of both drilling and turning. In addition to the three CNC axis, milling adds a fourth axis, Milling Head Z, or more. A fifth or sixth axis provide pivots and angles for greater flexibility.