Tig welding vertical up

Hello, im trying to learn to Tig weld vertical uphill, but am not doing well. I cant seem to avoid under cutting. Any ideas? Also, what is your opinion of the Miller Diversion 165?

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first make sure the metal is clean. hot rolled mill scale will cause undercut most everytime.

second, let cool between passes enough to touch without burning.

third, hold a pretty tight arc..a long arc tends to undercut


forth, make sure you are comfortable...

here is a video page on doing some vertical tig.

tig welding technique tips for tig welding practice

I think the diversion 165 is ok, but i hate the fact that the torch is hard wired in and you cant change it out easily....and its a big torch too.



its a good arc, and a good company, but they got it wrong on the torch.


best of luck,

jody