I'm NOT a welder,but I can make a decent bead, not always pretty, but will hold. I have a Lincoln 175 with 220 volt. I usually use .030 wire with Argon gas. My setting for mild steel is the scale reading A thru E is C, with the numerical setting about 6 1/2 to 7. I ran out of .030 wire and had a partial roll of .035. I had to up the scale to D or E with my numerical setting at 8 or 9. I had open heart triple by-pass surgery a few months ago and my memory is just getting back close to normal. I honestly don't remember, and I didn't make notes of settings in the past. I'm hoping having to increase the power is from the increase in wire size and not my welder giving out. Also Home Depot has .035 Super Arc L-56 ER 70S-6 wire. Can I use that wire, I'm not familiar with the designation: (ER). Any and all advise is greatly appreciated. James C. (Circuit Rider)