This video is about tig welding aluminum on AC at 50hz and at 250hz.
there was a noticeable difference at the 2 different settings. 50hz got completed penetration and 250hz did not penetrate.
I tried to keep travel speed the same for both welds by using a motorized welding positioner turntable.
Ck worldwide mt200 ac/dc tig welder set at 90 amps, AC balance set to 6 using 3/32" (2.4mm) 2% lanthanated electrode and 4943 aluminum filler rod.
This is a large aluminum tote tray to hold several grinders and abrasive wheels
There is a lot to talk about.
things like tungsten electrodes..type and size ( i like 2% lanthanated for everything and 3/32 takes care of most of my daily welding)
shielding gases ...argon is best to start but if you begin to specialize in thicker aluminum, it might make sense to use a blend of ...
200 amps might seem like a lot but with the large heat sink due to the size of the project, 200 amps was actually about right for a lot of it. I used the foot pedal and for some of the welds, I backed off the amps quite a lot but for a few of the welds I was welding a 3/16" (5mm) thick doubler a...
