There is a wealth of knowledge on the Miller site (
www.millerwelds.com) that gives you basic settings for all welding processes including TIG as well as technique suggestions. There is even a TIG calculator which helps you set up your machine for different materials and thicknesses. Check out
http://www.millerwelds.com/resources...ur-skills/tig/
It tells you that you need to use AC High Frequency for Aluminum as well as the initial settings to use for the thickness and type of weld you want to make.
Welding is Fun!