Had a few minutes to go in the basement and do a little welding tonight. I was running a Hobart 125 with .035 flux core wire maxed on power. In the other corner we had a Everlast 200 hooked to 110v power (120 amps, then 110 amps) pushing a Miller SP32 suitcse welder with .035 flux core wite. Had a few pieces of 1/4"x1-1/2" flast stock. Did a quick complete bevel on the grinder (eyeballed to appx 60 degrees), root opening was appx 1/16 or less and varied slightly. Keep in mind this whole thing took less than 30 minutes.
1 pass with the Hobart 125 and it was almost completely filled in the center. I had to touch up the ends. Upon bending as expected the start and ends were not good but the middle held together nicely. I have no doubt that with a little more than 2 minutes of setup and practice that it is possible for a skilled welder to get complete penetration in 1/4" material with this machine, which would lead me to beleive it is probably possible to weld 3/8" material with 2 or more passes on this machine. I will also plan on taking it and timing how long it will run on a 20 amp circuit sometime this weekend. It did not overheat on this task.
First try with the new Everlast 200 (Arrived on Friday) plugged into 110 volts set on 120 amps and about half way through the weld I blew through. I knew it was getting hot and I sped up but it was too late. It was also slightly underfilled the face but showed good penetration on the back side. Second try the machine was turned down to 110 amps and everything was looking good until the end where I blew through again. The weld was completely filled and about 1/16" tall. I think I am getting close to the right setup and with some more time adjusting and practicing there is no doubt in my mind that it is possible to pass a 3/8 bend test with this setup doing multiple passes.
Also ran a little 1/8 7018 on the Maxstar 150 hooked to 110v power (20 amps circuit) and set on 120 amps. No doubt in my mind that a skilled welder could pass a 3/8" bend test with that machine.
Anyhow for some reason it seems that the inverter arc welders hooked to 110v power had more power than the Hobart wire feeder. The Everlast 200 and Miller SP32 setup was really quite impressive for a machine on 110v power. I'll post a few pics tomorrow at work and plan on doing a slightly modified bend test with some 3/8 material this weekend. I'm still getting used to the Everlast 200 but really like it so far. Also really nice that it will push my suitcase welder which the Maxstar 150 won't do. I've already noticed how much better the Everlast is at running 6010 as well.