If we didn't have inverter type welders, this discussion wouldn't be happening. Those transformer type welders still have a place in this world. The inverters are more than twice as efficient as the transformer types for the same capability.
For automotive applications, TTws6 wouldn't be welding stuff over 3/16", maybe 1/4" on occasion.
Ken White has done a fantastic job of explaining how those pesky electrons flow into, through, and out of our magic spark boxes.
There is always something to be learned on this forum.
Everlast 250EX with cooler and WP20 Torch
Millermatic Mig Welder
Gas welding setup
A bunch of Snap-On tools
And a Brain