Hi,
I have built a microvawe transformer spotwelder, I have put a single turn of welder wire for in the secondary and I'm timing it with arduino. Worth mentioning it was/is a 230V transformer. Electrodes are sharpened copper rods. I believe the voltage is still high. The spotwelds it produces are slightly discolored and not as strong as you would expect. Is this design fundamentally borked? Is there anything else I can make to make it better?
Photo from test stage before it was built into a project box, it is less "shocking" now.
this post was submitted on 18 Oct 2023
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https://www.youtube.com/watch?v=K_pD0W_Fm6g
He burnt himself off a 12v battery. Increase the voltage by the amount you want to live dangerously at the benefit of getting better weld. It also suggests using two MCBs in series in case one of them does not trip for any reason.