... could making big wooden door 3) optical Servo or Stepper Applications :Widely used in Antique furniture with relief carving, ... windows processing.Special configuration : It can be customized servo driver , large format and special format models and choose imported ... ball screw precisionSpindle speed6000~24000rpm DriverStepper Driver(it can choose domestic or import servo driver)Tool Diameter3.175,4,6, ...