aluminum welding setups

[Kempy]

I test my PowerTig 250EX at 70A with the Frequency from 20Hz to 250Hz and the AC Balance from 10% to 90% and could not get a bad result using a 1/8 2% lanthanated tungsten on a 1/8th aluminum plate but turn down the argon low then the weld was bad black and messy.
Yes in the panel drawing the AC Balance is wrong the Less and More are reverse I will change it on the new drawing had no proof reader to help.

[Mr120]

I like your idea about using a diagram to illustrate your settings for a job. I've been just jotting down numbers but your diagram would make it a lot easier to eyeball my settings. I like dials but I sure like the memory feature of the digital welders.