... speed .A, All operations must be completed by PC, The pc must be under working conditions when machines ... of cnc routers.4,RailsBig size CNC routers must adopt imported widen square rails , The bearing ... size routers engrave 1.5 mm texts, they must be clear by magnifying glass.Maintenance of CNC Router ... when maintain the machine. When check work must open the power, need the professional electrician ...