zlacker

Oof, those welds are ugly. The author comments on the welding at the end of the article, but I'd venture a guess that if using a MIG setup the polarity may also be reversed and/or gas shielding may be wrong. On my machine the flux core wire vs solid core wire with shielding gas require opposite polarities...

source: I'm a terrible amateur welder

>>seemaz+(OP)
the last section discusses this. the author was having problems relating the feed and the current settings to the weld characteristics. personally I prefer to manage all that with a pedal and manual feed with a tig

>>seemaz+(OP)
I haven't seen welds that bad since visiting India, where I ran across some so dire I was compelled to photograph them in case the building fell down later: https://imgur.com/a/16FRlEW

Love the spirit of the build, though, and it's a case where weld cleanliness doesn't really matter, so, more power to him.

>>seemaz+(OP)
Yes I'm using flux-core wire and I do indeed have the polarity set for flux-core.

My conception was that we're adding power by increasing the voltage and we're stacking up material by adding wire, so to get good penetration on thick material I want lots of voltage and not much wire feed.

But actually it turns out that you make it hotter by increasing the wire feed speed.

I don't really see why, but at least now I know.

Here's a more recent weld: https://img.incoherency.co.uk/6464 - still not great but not nearly as bad.