Hi Ned, yes that is right.

I’ll keep it simple but undercutting is when the tubes are sort of thinned next to the weld by the welding process, robbed of material. Pulsing is a feature on a welder that turns the arc on and off at a certain rhythm helping the welder produce a consistent looking weld. Grinding is removing material with a grinder to smooth out the substrate for the second pass.

Great pictures and explanation. Though I’m in the dark about “undercutting,” “grinding,” and “pulsing.” It also sounds like if you are a good welder it is easy to make a pretty weld, but not so easy if you are a bad welder, so a pretty weld (though no guarantee it’s strong) increase the likelihood that it is strong. Is that right?

In any case the dress weld you show above is darn pretty, although I expect I’m biased.

Ned

Eric.