This is what I advised on a previous post for 1.6mm Aluminium practice:
http://www.mig-welding.co.uk/forum/threads/r-tech-tig-161-ac-dc.41982/page-2
Using the pedal
set between 75 and 90amps on display
ignore all the slope and pulse functions
post gas to a couple of seconds
balance to the 10 o clock position
frequency at 12 o clock
Zirconiated 1.6mm tungsten
10mm stick out
7 or 8 cup
5 LPM Argon
Floor the pedal to start and then back off once pool forms.