... Modestep motor (servo is option)Work voltageAC380V/50HzSuitable Industry1. Granite, Marble, Bluestone, Sandstone and other stone engraving2. Hard ... stone like Granite can be layered engraved to reach 3mm3. Marble, ... Heav-duty, Stable operation,High precision, Long lifetime.2.The whole machine is made of welding steel, high stiffness, the back table ...