Tools & Fabrication - Does thinner wire weld thin metal better?

I have had trouble welding sheet metal on my project car without it burning through and looking like crap. Im using a miller mig welder with .030 wire, would switching to .024 help to keep me from burning through this stuff?

I have it set to what miller recommends but it still burns through unless i go REAL fast...

Absolutely, welding thin metal with thick wire is close to impossible.

When welding on thin metal like a 20 gauge or even 22 gauge sheet metal I use a thin wire. I have the welder set on 1 and the wire speed about 35-40. I also use a 75/25 mix at 30psi on a 120v welder. Hope this helps you out OP

thanks for the help guys. Those are the same settings I was at Mr. Nguyen so I guess i try switching to .024 wire.

some welding machines just dont like welding thin stuff no matter what you do

Can you please post up pics of the pieces you welded? I would try the tip being a little further away. Or even have a faster travel speed. are you pushing or pulling?

Ill see if i still have it outside but i think i threw it out. I usually pull using a u shaped pattern.

Ill see if i still have it outside but i think i threw it out. I usually pull using a u shaped pattern.

Pushing will help you keep the heat down because you are aiming forward if that makes any sense to you. When I get to much heat, I would push rather than pull. When the weld is to cold I would pull the puddle so that I can get more heat.

I forgot to mention if you place the work piece on like a large piece of steal and clamp it down to it. Its another trick to keeping the heat down too.