I do have some new gas lens's coming from weldmonger, only for a 17 series torch.....because I have a new Lincoln Tic welder arriving tomorrow. I wanted to weld ac as well, and this seemed like a good opportunity to upgrade. Still have to troubleshoot this welder before I sell it. Hoping it is the g...

Tubing is thoroughly cleaned inside and out, deburred. I tried a new tank of argon today. Same results. Bluing of the tungsten inside the cup. Black around the weld. Starting to think it's the gas lense, again. Maybe restricting the gas somehow.

Hey, thanks for the replies. This sample weld was in the 20 cfh range. I increased it for this one. The 10 cfh was recommended from the instructor to reduce turbulence and since most joints are tubing, the argon gets trapped a little more (his words). And I have to say using his welder with10 cfh wa...

Hi all, my name's Chris. I make bicycle frames. Mainly out of steel. I have a small shop behind my house. I started in 2008 fillet brazing with an O/A setup. Built quite a few frames, forks, racks, and stems over the years. I am now trying to teach myself how to Tig weld frames. I've used a Mig torc...

Sorry, smaller image size.

Hi all, new to the forum and new to tig. I've been trying to troubleshoot what I think is argon contamination, but I'm also learning. I will apologize in advance. It's been a long road. Here's what I got: Bought a HTP Invertig 131 in 2014. Didn't really do much with it till recently. Maybe 1 or 2 bo...