Did you use the stainless wire or the ER70? Seems contradictory, or maybe I need more coffee!
Electrodes on MIG? Again, I'm confused, but that's nothing new.
Great job!! I like these DIY projects!
Hrrrm. I'll have to go check the box. I'm pretty sure the box said stainless filler, it's what I got years ago from the LWS for stainless work.
There's a replaceable copper electrode in the nose of the MIG gun that the wire is fed through and is one side of the electrical connection. I had #11 .030 electrodes (Tweco style Barnard gun,) that were not long enough for the gas shroud. I should have had #14 electrodes, about a quarter inch longer, so that the electrode is even with the end of the gas shroud. When using the #11 electrodes, there is far too long of a stick-out from the electrode to the work piece, and the wire was melting, then freezing before contacting the work piece. This leads to what
@Andy Kaminski refers as goobered welds, a lot of us call them bird<BEEP> welds, because that's exactly what they look like. They rest on top, and there's practically no penetration or melting of the work pieces.
As I said before, when I get the right gear, and the right settings on the machine, get set with the gun, squeeze the trigger, and watch the weld puddle form and join the pieces together.