... machine 2.ball screw 3.stepper motor 4.high precision rotary device for advertising engraving machine ZK-1224Introduction: 1.the ... Z-axis, higher precision and longer life time7. Function of re-carving after break point and power off, reducing the materials ... items: duct collector, helping to suck the dust, milling dust, rotary axis for cylindrical materials, DSP offline control system, when working ...