CNC machines use a high speed electric motor that is guided in the X, Y and Z direction by stepper motors. It’s like an under-control RotoZip. It takes a different mindset to use than 3d printing, but you can achieve precision results. A small, inexpensive CNC machine can easily mill to a .05mm accuracy. We have a small 300x180x40 mm all metal body machine. It is controlled by the computer using CAM (computer aided manufacturing) software. I use EstlCAM, but there are many different programs available for running CAM machines. Go over to our “The LAB” section to see more information about the machine.