burn through?

[jackfrost]

I have a Millermatic 140 Autoset turned all the way down, and I'm still burning through when putting new panels in (butt welded). the welder claims it'll do 24 ga., but this is 20 ga., and I'm still having problems. I'm not trying to do a continuous bead, just like 1/4" at a time.



is there something I can do to make it cooler? less wire speed? move the torch farther away? would those heat absorption pastes help? I have no problem with warping.


thanks.