INVOEE, China famous brand of CNC spindle inverter, Compared with other general traditional spindle VFD, iNVOEE VC680/690 series frequency converters can highly improve your machine tools function without changing your machine tool other onfiguration,including spindle fast acceleration/deceleration super low speed & large torque, stable precise rotating speed.Meanwhile,it can provide upgraded function,which general VFD canâ??t provide.Such as,spindle positioning servo,position interpolation,rigid tapping,thread cutting etc, to upgrade your machine tool function,added value and make your machine tool follow the tide of industrial upgrading.