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AC DC Tig Welding Machine

AC DC TIG (pulse) welding machines are usually for professional use on aluminium welding at automative car repair industry or high quality required stainless steel welding.

TIG welding is very versitile and produces the highest quality welds. It also takes considerable practice and is least productive.

TIG uses an torch with a tungsten electrode. Argon is used as a shielding gas to protect weld and tungsten. An arc is struck between the tungsten and the work and a short gap is maintained. As the weld progresses, filler wire is dipped in the weld pool. Power source is constant-current DC or AC depending on metal used.

Controlling the torch, feeding wire, moving at the right speed and also using the correct current makes it physically more complicated. Using a footpedal, you have 1 foot and both hands busy. It is easier for bench work.

TIG can do just about any metal with AC and a DC power source. DC is used on ferrous metals (steels.) AC is used on aluinum.

( This DIY welder only does DC)