... off restoring, continuation on breaking point ,processing time anticipation,and auto=feeding blades.4.Strong functions, easy operation, sturdy, durable ... Speed0-6000mm/s Rotation Speed of Spindle Motor6000-24000rpmEngraving ToolΦ3.175 ,Φ4,Φ6(optional)Dictate FormatG-Code Ball ... )7.Vacuum System(optional) 1500W 300x250x40mm SD3025MV Mini CNC Router CNC Engraver processing small precision instruments