... high precision 4. Low cost cheap cnc multi head machine with stepper motor Advantages: 1) Advanced design: Modularizing product design, cast ... motor (servo motor, optional)Guide railHiwin square guide railTransmission Gear rack for x,y-axis, ball screw for z-axisApplication: The machine ... product, etc., also can process iron, copper, aluminum. plastic board, plank and so on, which are metal or nometal ...