... with stepping motor 4.HIWIN guide rail High quality mini cnc milling machine for metal(7STC-6060A) Product features: With 600mm* 600mm ... the real-time trajectory, plus or minus Z-axis depth in real-time, and adjust the motor speed conveniently;Powerful ... professional manufacturer of all kinds of CNC engraving machines, suitable for various of materials, such as: wood, stone, jade, acrylic, ...