Welding Tips and Tricks

I have been buiing a powder coat oven from galvanized and not been happy with the way it welds so I just wanted to try different wires and me being new its experimentation too. I got some silicon bronze wire pretty much as a seam filler but I read different things. I read voltage all the way down and wire speed all the way up and another "tip" said to pretty much max out voltage and wore speed well what one is it? I know melting temp is low so would I be better off starting at low voltage and high wire speed? I'm welding .060" galvanized, I-mig 140 and will be using 100% argon

Well I got my argon and it definitely welds wayyyyy better with 100% argon, than 80/20 argon/co2. I had to grind down the nozzle cause Jodi had a tip on that. The tip was recessed pretty far so it made the stick out very long so I ground it down even and it's easier to keep good stick out length and easier to see. But I noticed this wire is sensitive to stick out. I had it too short a few times and no lie it came out like poop, like it was half melted ice cream lol. I just got farther away from the work piece and it was good. So far I love this stuff, NO spatter, grinds easier, fills gaps easier, etc. And I'm using it on galvanized and NO spatter, and no sparks when grinding.