... adjustment design, meet high welding quality needs. WSM IGBT Pulse argon arc welding machine series WSM-315/ WSM-400/WSM ... current, attenuation time adjustment at any time.Multi pulse adjustment function, fast pulse current upward and downward speed, good look welding ... Arcing way High frequency High frequency High frequency Pulse frequency(low)222 Pulse frequency(middle)200200200 Down-slope time(S)0 ...