Welding Tips and Tricks

Hi

I am just starting out with a "unimig" 140amp DC invertor with lift TIG function. I am atempting to weld 20 guage(0.9mm) sheet metal for automotive repairs. The problem I am having is that it appears to be too hot and I am getting burn through, the welder is set at 10A(lowest it will go, and I have a flow of 10L/min argon/co2, I am using 1.6mm electrodes sharpened to 30 degrees. I have the torch attached to the negative, and my clamp is in the positve.

What am I doing wrong?

Is my welder too big? Do I need a high frequency unit?

I will be getting some clean scrap to practice on and will be percivering until I get it down pat.

Any help you guys can offer in the meantime would be greatly appreciated.

Kind Regards
Ben

Ben, get some straight argon for your tig welding. the ar/c02 mix is only for mig and sounds like your main problem.
10 amps should be plenty low enough to weld without holes on 20 ga.

thanks,

jody

i agree with admin. you should think about your tungsten electrode. i think you should try out the .040 mm red point for low amperage. and you should be fine, do 100%argon too.

best of luck you´ll get there. i love body work too.

mainly offroad

Thanks for the help, i am getting the gas exchanged today.