... ball screw 3.stepper motor 4.high precision Engraving machine for Crafts gifts processing ZK-1224Introduction: 1.the whole ... when working no need the computerApplication:wood working, furniture making and engraving, arts and crafts, advertisement,wave plate processing ... kinds of metal and nonmetal materials, such as wood/MDF, PVC plastic, plexiglass, acrylic, organic glass, marble, granite, aluminium ...