# phase welder on 240 V single phase?

No.

I think this may work - I found this post on an engineering news group - just no description of how he did it.. I Have An Older Airco [Miller] Mig Welder----------------100% Duty Cycle------And Get Ready For This!! It's 3 phase--------Running On Single Phase!!!! I Looked at The Schematic,And Wired It To What I Thought Should Work.On The Old Miller's Everything Is wired In the Back,You Lift A Flap,And there Is A huge Terminal block For ALL The Connections!! Wich Is the Way All welders Should Be By The Way,And Sure Enough,When I powered it up The Freaking Thing Worked!! Only Thing Is I Lost A Bit Of Control On The Heat, But Otherwise It Works fine! I Use It To Weld Aluminum With A Great Deal Of Sucsess. And I Did This After Everyone Told Me It Can't be Done-----------------ED

My only concern would be overheating/loading if you aren't careful while running it since there are components that are no longer contributing to the load current. Billh

You'll have to change the fan motor to a single phase motor. Otherwise it will work. Max output amperage should be held to about 170 amps to prevent overheating the transformer/diodes.

Gary