How To: Spot welding

[Bruce Parker (RIP)]

Originally Posted by Mike Kelly

I've seen situations where certain fussy restorers do the plug weld, then use a small spot drill to replicate the small dish that a genuine spot welder leaves on the panel. It never looks totally convincing though , because the genuine spot crater has a slight dish or cratered shape to it that is not easy to replicate

The welders at the local TAFE were 3 phase things..like night and day the difference to the average home setup struggling with single phase .. your grandmother could do perfect large welds with those industrial machines.

Ah, and then there's the reach. I'd spend the bucks to get a home spot welder only to find the welds I need are beyond the reach of my new toy. If the right dimple was a thing I'd get out the dremel tool.