Help Welding a Welder Cart

[f350ca]

going from .025 to .030 would be the same as jumping from 1/8 to 5/32 rod. Ed if your machine has the auto settings go with them, I have a old Lincoln, think its an SP250, fully automatic, (hope the computer never dies), I never stray from what it sets. You tell it type of metal (steel ss aluminum) type of gas (argon, argon/co2 or argon/co2/oxygen) wire size and metal thickness and away it goes. All I ever do is go heavier on the thickness to get a hotter weld. I tried the argon/co2 mix (still have a small bottle for sheet metal) but found the welds too cold. If you can pick up the part 1/2 hour after you welded it you weren't welding hot enough. I now use an argon/co2 mix with something like 2% oxygen and .035 wire. Its like welding hot with 7018 stick. With a proper chamfer a single pass will penetrate fully on 3/8 plate. With the straight argon/co2 I could never get good constant penetration, test samples would break beside the weld.
Greg