A little side story that shows how this thread pays dividends.
AZPete wanted to use my welder to fix his riding mower that he just purchased; it had some bracketry that had broken on the body and a big hole in the mower deck. Using scrap metal that I had, he fashioned a patch piece, and we went to work. Not knowing what metal thickness it was, I took a wild-ass guess, consulted my chart of wire speed and voltage on my MIG, and just laid a small bead on a good section of the mower deck. It looked "cold", much as Abe's original welds. Using the guidance provided in this thread, I bumped up the voltage and tried again: and hit what looked to be the sweet spot. I then proceeded to weld a nice bead all around the patch, just as perfect as you please. I blew a couple of holes in the rusty mower deck, but remembered that if I lower the voltage and keep the puddle moving back and forth, you can close the hole. A few seconds doing that, and the hole was closed.
I did the same to the bracketry, only this time the thickness exceeded the chart for 0.025" wire. I went as high as recommended, but it was too cold. I was also working where the gas had no where to go, so I slowed the wire speed down, and BINGO! great penetration began to happen. I was welding vertically, and remembered (from this thread) to push the bead up from the bottom. I ended up with good welds, not quite like Jeremy's, but nevertheless I was quite proud of myself considering I haven't welded in a year and was working on metal thicknesses I had not seen.
So...long story short...even us old dogs need to be reminded of techniques, tricks, and tips. Thanks all!
AZPete wanted to use my welder to fix his riding mower that he just purchased; it had some bracketry that had broken on the body and a big hole in the mower deck. Using scrap metal that I had, he fashioned a patch piece, and we went to work. Not knowing what metal thickness it was, I took a wild-ass guess, consulted my chart of wire speed and voltage on my MIG, and just laid a small bead on a good section of the mower deck. It looked "cold", much as Abe's original welds. Using the guidance provided in this thread, I bumped up the voltage and tried again: and hit what looked to be the sweet spot. I then proceeded to weld a nice bead all around the patch, just as perfect as you please. I blew a couple of holes in the rusty mower deck, but remembered that if I lower the voltage and keep the puddle moving back and forth, you can close the hole. A few seconds doing that, and the hole was closed.
I did the same to the bracketry, only this time the thickness exceeded the chart for 0.025" wire. I went as high as recommended, but it was too cold. I was also working where the gas had no where to go, so I slowed the wire speed down, and BINGO! great penetration began to happen. I was welding vertically, and remembered (from this thread) to push the bead up from the bottom. I ended up with good welds, not quite like Jeremy's, but nevertheless I was quite proud of myself considering I haven't welded in a year and was working on metal thicknesses I had not seen.
So...long story short...even us old dogs need to be reminded of techniques, tricks, and tips. Thanks all!