Do not know ???

by Brian Tobin
(Weatherly,PA USA)

I am a new at Tig Welding aluminum, need advice on setting welder up a miller using 30 argon 50 helium. Not sure where all the knobs are to be set when trying to weld? Are there any book that might help??

THANK YOU...
-----------------------------------------------------


if its an old school transformer machine, here are the basics

alternating current

high frequency set on continuous

contactor set to remote
amperage switch set to remote

set main amperage to a little more than one amp per thousandths of thickness being welded.

if the machine has ac balance, set it to 7


set helium and argon flowmeters to 10 cfh with a #7 cup

use 2% lanthanated, thoriated, or ceriated electrode big enough to handle the amperage
1/16 is ok up to around 85 amps

after that 3/32 up to around 200

over 200 needs a 1/8"