I've been giving some thought lately to buying a MIG welder, and I really like the feature set of the MTS200. I noticed the other day that it apparently can weld Aluminum, and that got me to thinking. In the TIG world, AC is required to break up the oxidation layer in order to weld Al. However, the MTS200 is a DC inverter, so how does this work?
When I google "MIG aluminum", pretty much every resource says that a spool gun is required since soft Al wire can't be pushed very far. However the MTS can't use a spool gun, so how is it able to push the wire?
From the manual I noted that .04 wire is recommended for welding aluminum (perhaps this large wire is why a spool gun is not needed?). I haven't MIGed before, but I assume that using a larger wire will require more heat input, which might prevent me from working on thinner material? Just curious what the implications of using .04 wire might be.
MIGing aluminum would not be my primary use for this machine, but I would still like to have access to the process and understand what the limitations might be.