All the hate from when I recommend 2 lipos and now it’s becoming more and more common
Kcapps deliver 1200amps top single lipos are delivering that as a supply
If you want to matain in the speed you can do on dule lipos you probably need dule kcaps as the kcaps heat up thay need (beer brakes) as well.
fined the week point is the XT150 connectors from the supply to the unit that heats up the most more than the probe. XT90 get so hot I could barly toutch them. Still recommend minimum XT150 or better or removing the connectors or multiple wires on the input terminals of the Kweld
After how many welds are these things heating up? like 10? 100? Also anyone has suggested settings for 0.2mm nickel strips? (idk what settings are even available on it)
I weld 0.15mm nickel at 27-30J and I can do probably 50 welds before the probe wires and xt90 parallel connector gets hot enough to start weakening the welds.
@Darkie02 i’m all for beer breaks, but the kWeld is turning me into a heavier drinker than I already am
I do need to try beefing up the connections to the lipos, as well as beefing up (or duplicating) the probe wire situation.
They have been on backorder in U.S. for a while now, but now they are out of stock worldwide. Seems like Turnigy can’t keep up with the increased demand from you guys
That’s still valid, maybe even quicker. My electronics manufacturer is working on them.
He has shown me renderings, that’s a manually operated and spring loaded solution. I suggested to add a trigger switch as well. Haven’t heard anything new since then, and I know that he is extremely busy with his running business.
The silicone wires can be operated at up to 200 deg C, so they should be fine as long as you don’t touch them. Otherwise, upgrading to 6 or 4AWG would be the simpler option compared to water cooling them. One guy added XT150s to the welder unit’s output and made the electrodes replaceable. My limits here are rather the electrodes, and I actually use a bowl of water to keep them cool. Don’t ever spill that, however…
If you were to rough guess, or anyone, 50 joules for 0.2mm nickel? Too much? I just binned a bunch of crap cells so I don’t have much to experiment with atm. Be nice to get within ballpark with minimal trial and error.
I was going to parallel the 5000mah or even the 6000mah ones if i could have found them. so 3X 4000mah would be mathematically the same as 2X 6000mah. and i was going to use xt150’s for the connection to the welder with a paralleling adapter for the lipos.
remember there is a cut off limit to the KWeld of 2000A
So mathematically absolute max is
0.0042ohm*2000A=8.4V
3s max V 12.6-8.4V=4.2V
2.7V/2000A=0.0021ohm (2.1ohm)
You power supply battery must have a minimum internal resistance of 2.1Ohm including all the cables and joints.
Befor some one asks on paper with the green Turnigy graphite don’t exceed more than the following in parallel. (Discamer this is all mathematically you battery’s could be better or worse than the spec same apply to your KWeld)
when going close to the 2kA limit, it is also important to mention that
the 4.2mOhm system resistance includes a typical 1mOhm of the weld spot itself. This is not present during calibration, and one can easily run into overcurrent during the test pulse (SHORT step).
the 2kA is only valid when keeping the total (round trip!) cable length at the stock 1.0 meter. (when using standard Lipo batteries, then that amount doesn’t need to be considered, the same for the electrode lengths and bus bars - there is enough safety margin in the design).
