HD-9015 Stone CNC Router 1.Cast iron stucture 2.High speed Stepper motor ... cooling spindle 4.DSP control system HD-9015 Stone CNC Router Machine Standard Features1.Whole cast iron structure, Bearing heavy, ... cooling) Spindle4.Taiwan made inverters, fully shielded, uneasy distorted cable, 5.Adopt DSP control system,high precison and high speed ... 0-24000rpm/minDrive motorstepper HD-9015 Stone CNC Router