Hello name is Duke, I am an experienced welder, but new to tig welding. I am trying to practice on aluminum. I'm running 100% argon 20 cfm. 2% thoriated tungston and pure. I can start an arc on DC, but I'm having such a hard time lift starting on ac. I'm using a foot pedal and welder is set to 100 amps. Once it starts I usually can keep it going for a bit, but nothing like DC. Am I doing something wrong?
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miller 180 SD syncrowave ac tig problems
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High Frequency
Originally posted by dukie1877 View PostHello name is Duke, I am an experienced welder, but new to tig welding. I am trying to practice on aluminum. I'm running 100% argon 20 cfm. 2% thoriated tungston and pure. I can start an arc on DC, but I'm having such a hard time lift starting on ac. I'm using a foot pedal and welder is set to 100 amps. Once it starts I usually can keep it going for a bit, but nothing like DC. Am I doing something wrong?
High frequency is a convenience on DC, but a necessity on AC.
Disclaimer: I don't claim to be a welding expert, I replied because I used to have a 180 Syncrowave.Syncrowave 200, Millermatic 211, Victor torch, Propane forge....
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Originally posted by dukie1877 View Post
Just curious did you like your 180s you guys had?
I replaced it because I got a deal that I could not pass up on a Syncrowave 200. The main advantage of the 200, for me, is pulse, which I use on thin copper. I don't generally work on thicker metal, so power is not a concern. I can always stick weld thick steel or SS. At this point, I would not go back to a welder without pulse. In a perfect world I would have a Syncrowave 250 or 350 with pulse, but since I don't really need the power, I will probably stay with the 200 for the foreseeable future.
Good luck on resolving the high frequency problem; I hope that it is only the points.Syncrowave 200, Millermatic 211, Victor torch, Propane forge....
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