... adopt rack and pinion transmission, fast working, high efficiency and low cost; Z axis adopts Germany-made ball screw, with high precision ... /50HzWorking ModeStepperCommandG code (HPGL,U00,mmg,plt)Operating SystemDSP with USB interfaceDiameter of cutterφ3.175-φ12.7mmCooling ModeWater-coolingWork-holdingBy ...