... machine1.IGBT inverter tech,current-mode control,reliable quality,stable performance2.Closed loop feedback control,constant ... arc, little spatter,deep penetration,beautiful shaping,high welding efficiency4.Slow wire feeding during arc starting ... tip ball after welding,reliable arc starting5.Suitable for work piece with a thickness of more ... *300*540600*350*580 Good quality IGBT welding machine(CCC&CE)