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fosterjeff00
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    Wed May 31, 2023 6:56 pm

Miller syncrowave 200 help
I have a miller syncrowave 200.
The machine was working fine but all of sudden started to melt the tungsten in ac mode.
I sent out the circuit board to get tested and it tested good.
I changed the bottle of argon but still same thing.
I think it’s stuck in dc + while in ac mode.
If anybody on here has any suggestions on what it could be please let me know.
cj737
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    Thu Sep 29, 2016 8:59 am

If it’s melting the tungsten, I’d look towards the gas flow being a problem. You swapped bottles, but what about changing lenses or torches?

And definitely check your hose carefully along the full length. I literally just had to replace my 25’ superflex hose due to a puncture. Cost me a gas lens, #10 cup, a tungsten and the hose.
Jack Ryan
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    Wed Mar 24, 2021 10:20 pm
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    Adelaide, Australia

Sorry to mention the obvious, but do you have the leads the right way around? It matters in AC so the balance works properly.

Jack
AJ Clayton
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    Mon Jun 19, 2023 10:51 am

I’m with Jack on the leads being backwards. Been there just the other day. Scratched my head for about a hour.

50 or so amps It will melt the electrode like butter.
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