... ,cnc engraving machine,small intertia,high rigidity,space adjustabl scanner laser engraving machineCNC Router YH-1625,YH-1325,YH1613 ... good sealing capability. External circulation tool cooling system . * High power , high speed water cooling spindle, precision ER elastic collets. * ... Driver System Step: AC stepper/AC Servro(optional) (10)Power Supply: AC220V/AC380(11)Spindle Rotary Speed: 0-24000rpm ( ...