... cnc engraving and milling machine 1.3-D engrave on metal, aluminium, cuprum, steal 2.DSP control system 3. servo motor system cnc engraving and ... high precision can be last all life time. Twin nut ball bearing screw bar and rectangle guide rail transmission ... , max speed 24,000rpm, high-power milling and small knife fine artifactitious function Digital control system ResolutionParameters:Overall Size: ...