Comment by AYBABTME
4 years ago
FYI: spot welding is a lot easier and precise using this welder: https://www.keenlab.de/index.php/portfolio-item/kweld/
With the capacitor module, you can easily power it with a lab bench power supply.
4 years ago
FYI: spot welding is a lot easier and precise using this welder: https://www.keenlab.de/index.php/portfolio-item/kweld/
With the capacitor module, you can easily power it with a lab bench power supply.
Finally, a constructive comment instead of a bunch of legal stuff and fantasy performance figures. Thank you very much, I'll look into this.
edit: Hm, the power supply looks to be a LiPo pack, the other two options are no longer available. But very nicely executed kit, now to find a way to power it from a wall socket.
If you pair it with this ultracapacitor bank, you can power it with a regular lab bench power supply.
https://www.keenlab.de/index.php/product/kweld-ultracapacito...
That's what I did for a custom ~600Wh pack I made. From memory (that was ~3y ago) I've set the voltage to ~12V and amperage to 30A. If you weld super fast, you'll start to be rate limited by the capacitor charge rate, but then you can just slow down a bit and all is well. It seems like the creator of the project has since released this custom voltage regulator that you can hook to a server power supply:
https://www.keenlab.de/index.php/product/ksupply/
This would be useful if you don't have a lab bench powersupply that can't provide 30A at 12V, and you're impatient. The website looks like their stuff is all in stock, so you shouldn't have a problem. Although you already built your pack so it might be too late. :)
Too late for this one but for sure there will be more and the capability to spotweld stuff is handy anyway. I already repaired a bunch of electric tool batteries as well as a series of Nikon camera batteries for a relative. Very useful skill this. Thanks again for the pointer.