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Chak
So tig welding needs argon, and best practice is argon front and back. Front from the torch, back from a back purge in the heat sink. Building one frame at a time you dont think about how much argon you are using, but 30 odd is going to add up, so this week I'm trying to get a precise flow rate for optimal coverage, and working out how to seal the frames as well as possible. This isn't a isen frame, but is being built as if it was, if that makes sense.... You can see from how silvery the welds are there is plenty of argon to go around, so I'll turn it down a bit and do the other side.