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Just to update this for posterity, I gave up on the CH welder and bought a Hobart 140. My wallet hates me, but my welds don't **** (as bad) now!

Sigh....if I'm already in it for the nice tank and wire and helmet, I guess it only makes sense to go ahead and splurge on a decent welder. :sad: -I triple-checked polarity with a meter, I'm definitely electrode positive. -I was questioning gas flow because of some comments on Facebook, but...

I still have the broken pieces of plastic from that picture, lol. I broke them off because (well, aside from stupidity :thumbup: ) it looks like it's simply a knob that you turn. I guess sometimes it DOES pay to read the directions--if you have them! The two bus bars in the pic are still intact...

EDIT: I just saw the manual page; guess you posted while I was typing. Thank you AnEv942! Extremely helpful!! Alright, I checked the 4 connections with a multimeter. North is negative, south is positive. west is electrode, right is ground. Oddly, it's roughly 45V AC when the trigger is pressed...

Thank you for the quick response! There are 4 wires coming into the polarity "switch", which doesn't even seem physically able to switch anything. Swapping those copper plates in the 3rd pic swaps the connection the same as swapping wires. Is there a simple way to tell what polarity it's set to...

I recently bought a Farm Hand (rebranded Campbell-Hausfield) Versa Arc 95 welder. I know this is a crappy model, and it's old, but it works...or should. I wanted to get a "cheap" start to MIG welding before upgrading to a better machine later on. I've got a bottle of C25, regulated to ~20CFH at...