that would require a firmware extension as kWeld does not have a proper automation interface. It has been requested many times, but I just never hav gotten to that :-/
not yet, but we are making a first batch of 20 right now. I hope to be able to open up for preorders before Christmas. The first units will be kits, and I might have a price point in one or two weeks from now. Software will be limited when they get released, but we are and will remain working heavily on that thereafter. My plan is to reach at least kWeld status, with proper energy metering and of course capacitor voltage control.
That amount of current is definitely by far enough for 0.3mm nickel, and also solid copper sheets should be possible. But I havent been able to test many variants yet, rather concenrating on development. I'm curious to read what you guys will achieve with it.yeah, good point. Any idea how to explain that to 10,000 customers?
aarrgh, again... checking,
hobbyking.com
hobbyking.com
haha idk, tell them it is a pure pos and not worth it, hopefully they will trust youyeah, good point. Any idea how to explain that to 10,000 customers?
I am telling you guys, use a 20$ stack of Ev lipos from such as the Chevrolet. Volt.
Hello, how can I unlock the current kWeld from its limit of 2000?Should we build SuperCap module out of this Maxwell 3400F, 3V/3.15Vmax. For 3S2P, we will get 2,266F with higher Vcap, much lower ESR, 10x the Farad, I expect > 3,xxx Amp output can be achieved. Or the more hard-core 4S2P, or even 4S1P with the > 3,xxxF, 2.85V (total 750F or so) this is what we can get much more headroom V (2.85V*4Serial). From V = I*R, increase V (from 3S to 4S caps = from 8.55Vmax to 11.4Vmax) and lower R (big wires), Imax will be increased and t will be decreased dramatically - that is exactly what we want for high Q (very high energy in very short time). PSU might need to be upgraded to ≈14.5V / > 60A, programmable CC-CV charger preferred. Just make sure your gears can withstand this magnitude of punch. The 3S/4S balancer board also needed. Should be able to weld thicker Cu directly to cell cap. May be 0.3-0.5mm ? Have to unlock current kWeld from its 2,000-A limit (factory default). It just looks promising. These Maxwell 3400F3V/3.15Vmax are expensive plus they are heavy and gigantic (1 pc ≈ 1 soda can). So shipping cost will be steep too. Alternatively, I found 3400F 2.85V Maxwell used ones for sales cheap at $10.- ea. But buying used ones is like buying lotto, could be a complete Crapacitor. :lol: :lol: The ESR is what matters here and they keep increasing with usage - not to mention if they are even genuine Maxwell originally. That's the trade-off. I don't know whether there is an easy way to test these SuperCaps reliably, especially the ESR. Any idea ?
Also the TVS diodes might need mods to cope with the new much higher oomphs ?
Frank, do these sound OK to you ? Is it possible to unlock this kWeld's 2,000-A limit ? Pls advise.
any news Frank? still waitingnot yet, but we are making a first batch of 20 right now. I hope to be able to open up for preorders before Christmas. The first units will be kits, and I might have a price point in one or two weeks from now. Software will be limited when they get released, but we are and will remain working heavily on that thereafter. My plan is to reach at least kWeld status, with proper energy metering and of course capacitor voltage control.
And to your question: it has already done stress testing with full steam 13ms / 3300 ampere pulses, once every two seconds. Sock solid after 100,000 cycles
Yes. Now it works. I'm happy.Maybe recalibrate the resistance and wire length like when you first bought it.
