Kweld spot welder

Packaged quite nicely, arrived a day early… And I ordered on Friday.

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Just need to figure out how to assemble, and print the case.

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there’s a great PDF on the k-weld site… and yout00b vids… but it’s really easy…

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Yeah I’m figuring it out right now, didn’t see the pdf, I’ll look again.

Edit: found it

don’t fukk with the washers till you read the pdf…

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I have my probes wrapped in high density foam and shrink wrap, makes them a bit fatter and easier to hold and the probes don’t burn my hands :ok_hand:

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I guess a few of us are gonna start our battery building endeavors together :sweat_smile: @Linny @ShutterShock

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Oh yeah I saw that haha, I don’t have a crimping tool (one of the few things I don’t have lol) so I will have to use pliers for that part.

Haha you’re right, I’ve got fishpaper and nickel on the way from Ali, who knows when it will be here though

Sunstone welders maybe

thats well over 2k and you need really powerfull mains or maybe some sort of capacitor bank or something

Has anyone noticed the tip in the negative input, circuitry side, gets dull faster than the positive side. I resharpen them about the same interval but the positive terminal seems to always need less.

One the flip side, I could just be crazy… lol

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It’s probably just because of how electrical current flows, if anything I’d imagine that your situation would happen over time.


No more lithium fires.

Highly recommend.

8volts 70 amps.

The only annoying thing is,. Even after you unplug the caps store voltage for hours. Even with my small fan on. I need to hook up a 10 watt dump resistor or something. It’s annoying :rage:

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Nice build! @Annoyance, yeah I know. But a disconnect switch in the power line is prohibitive. I use to short the probes and make a few weld pulses, this will quickly deplete them down below 4V. A dump resistor (or halogen bulb) can do the rest then.

Yeah. I’m going to put a momentary switch and a few load resistors or a bulb.

.250mah fan still takes 40 minutes to discharge them


I think in the future , i’m going to add a xt60 for a dump to kill the batteries.
The fan control on kcap #1 is controlling the fan.
I made sure to add a diode, so when i manually turn on the fans, it doesn’t feedback into the PWM controller for the onboard kcap thermistor/ fan control

new with two kcaps, one ksupply, and one HP power supply, i can non stop weld .25mm nickel… Just need to add a second pair of electrodes so the others can cool down

Now 60 joules happens all at once, and less heating of metal, and actual 100 percent penatration. A single k cap could not do that. At least on .25/.20mm. A good lipo could do that, but I’m sick of melting lipos with 800 welds in a sitting

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I headed in the opposite price direction with just a oversized spim08hp pack. Something like $35 for a 3S4P.

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Those welds look nice kevin, also that thing looks like a bomb :joy:

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