HF Start operation-noob question

admin

I am trying to figure out if my Chinese multi-function machine (Simadre CT520) is working correctly. Should you have to hold down the torch switch continuously, or just to start the TIG arc or Plasma cut then release and the arc and gas keep going until you pull away? Mine does the former, but it seems like HF "Start" and HF "Continuous" are different? It seems to work OK this way but..... Does running HF all the time cause excess wear and tear? How does this work with the "Big" brand welders?Bob G.