Learning manual pulsing on thin stainless is hard when everything happens in a fraction of a second, and that is the problem this animation takes on. Welding Techniques (Arc_Trainer) built a CGI walkthrough of the manual pulsing technique used to get the dimes look, and the pace is the point: the travel speed was deliberately kept slow so viewers without experience can follow the steps. In my view that choice makes the sequence far easier to study than real-time footage would be.
The build is a digital 3D rendering of the gas tungsten arc welding process. It includes a torch with a nozzle, a pointed tungsten electrode, the electric arc, a filler rod and two metal plates. The gas cup shown is a size 12 running a 1/16 electrode. Those are the pieces depicted, with nothing extra bolted on.
What stands out to me is how clearly the sequence reads. The arc melts the base metal into a molten puddle, the filler is periodically dipped into the pool, and the molten metal solidifies into a rippled bead. The finished ripples cool from glowing red to yellow-gold, which makes the progression easy to track. The technique shown is throwing amps while adding filler, letting it wet, then stepping forward while it cools. A straight torch angle is needed to get the round bead behind the dimes look, a detail I think a lot of beginners miss.
Two things are worth flagging. The maker notes the bead may be a bit too small for the cup and electrode shown, which seems like a fair admission. Also, a question about why the arc spot dances away from the fill rod has not been answered yet, and I would enjoy seeing that covered in a follow-up.
Project by Welding Techniques (Arc_Trainer). Watch it on their YouTube channel: