How To Weld Aluminum With A Hobart Mig Welder. Load up your Aluminum MIG wire. The recommended electrode angle of travel is 5 to 15 degrees.
Aluminum should be thoroughly cleaned prior to welding including the removal of any lubricants from the material. This will allow the molten metal droplets to go from one end of the electrode to what you are trying to weld. Stick welding Aluminum polarity.
Keep a 14 to 38 in.
Check Your Lincoln 140 is set to MIG gun positive for MIG welding Aluminum. Use the spray transfer process when you want to weld the aluminum properly. Just remember that it would need a lot of heat so that it can work properly. But I saw Hobarts welding chart included settings to weld 16- and 12-gauge aluminum using 0030 wire.