How To Weld Aluminium With A Spool Gun. 100 argon gas is usually the gas of choice but mixtures like 5050 argonhelium can be helpful for welding thick sectionsMake sure the polarity is connected properly. I recently wrote an article on this subject have a look at it.
Place the spool of aluminum wire inside the canister of the gun and cover it. The fact that Mig or to give it its proper name Gas metal arc welding GMAW aluminium is hard is probably not news to most of you who read this blog. You can see for yourself how these systems function by taking a peek at the Lotus Technology MSG094 Spool Gun.
In this video I show how I installed a spool gun for welding aluminum on my Yes Welder Mig-250 Pro my first test welds with it and cuttingacid etching the welds to check penetration.
Do not forget to close the tension arm present at the side of your spool gun. Watch this video to learn how to MIG weld aluminum with a spool gun. Mig welding aluminum requires reverse polarity. But really thick aluminum welds a lot better with a preheat.