... /Plasma Cutting 3.HF Pilot Arc Start 4.AC Bias/AC Balance adjust 4IN1 Multi-process Machine TC-205AC ... of user-defined parameters.4) 4 working modes:AC TIG/DC TIG/MMA/Plasma cutting.5) HF ... Arc Start, Arc Force, Anti-Stick.7) Professional AC TIG welding system.8) Available to connect foot pedal( ... Duty CycleMMA/TIG:60% 200A,PAC:60% 50APulse Frequency Range0.2-20HzPulse Width Range1-100%Current Up-slope ...