Welder World Blog

xrayrep:

Nice job! It would work better if you turned the power on/off with a foot switch because then you could turn off the heat while still holding pressure on the spot welded joint. You never should pull the electrodes apart while the spot weld is melted. Wait a half second or so after voltage is turned off, THEN release the pressure. I own a professional spot welder, and that’s how the manufacturer explains to do it. Still, you did a ncie job on the construction!

MrJslade:

I made one and its seems to work pretty good but only for small things. Its works great for wire under 1/8 inch but when it comes to sheet its got to be under .4 mm. Stainless works alot better I think because of its higher resistance. What it really needs is a driver curciut on the primary side.

2LateIWon:

@XGsboty

Sweet looks like fun to play with then

2LateIWon:

don’t you have to worry about microwave radiation?

becarful

XGsboty:

Nope, just regular galvanized steel(?). I know, it’s a big flaw but this wasn’t ever used in anything real

XGsboty:

Yes it’s directly powered directly from line, 230V to be exact as I live in Finland. I personally see very little advantage of any drive circuit. Of course a little higher frequency would be great, but if not easily availuable, it’s not worth the effort.

XGsboty:

Mot is probably best thing you can find. (Cheapest and easily available) Basicly any E-core transformer would do, you just need to replace the secondary with loop or two of thick wire. If you need to use it for longer periods, you need cooling. Bigger the core -> it’ll run cooler and you get more power.

twenglish1:

nice spot welder!!! 5 stars!!! now let me ask: what size wire is that, it is huge!

dundermiflinpaper:

dude, great job! if you put copper electrodes on there, that would be pro!

lordhenry1970:

Nice stuff. What are your electrodes made of exactly? They don’t seem to be copper at all. Perhaps I’m wrong.

finster101:

Nice job and good video. How did you modify the transformer?