I tap the foot pedal and it doesn’t do anything, or I have the shorted plug for auto welding and it detects as manual
Have you tried a continuity tester on the foot peddle?
sorry for late response, really busy here…
does the unit trigger when you short the two poles on the green connector with something else, e.g. a piece of copper wire? That way you can isolate the problem.
I advise against extending the leads when in an overcurrent situation, as this increases inductance and inductive kickback which can break the welder (the operation manual describes this in detail). The unit handles 2000 amperes max with the stock 1 meter length, and if your battery delivers more than that then you need to reduce its power by either reducing capacity and/or voltage.
We were in contact via email, is this solved meanwhile. From my experience this is mostly caused by a bad calibration. Make sure that all nuts and bolts are tight, clean the tips before, and make sure to press the >>tips<< of the electrodes together hard during the SHORT step. Make sure you don’t get any sparks. Changing something on the electrode system (e.g. new tips) also requires new calibration.
These diodes failing causes the unit either to be unusable (shows ‘remove short’) or unprotected, but the fuse is way stronger than any of the circuit board tracks.
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all solved. shortened leads and reduced the voltage
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hi, i have a kweld with kcap and ksupply. I have the new revision, so according to Frank it should be adjusted to 8.5 v max. I’m still new to the subject. i want to welden 18650 samsung cell with 0.15 nickel strips. my questions: does the kweld have to calibrate?, i bought the finished cable sett. but i have not adjusted the cable length. do I have to? what else do I have to watch? with this set which J should I use between nickel and battery and then nickel on nickel?
Thnx lot 
Definitely worth reading about the wire length and not plug and play but with the few joules you’ll need to do .15 nickel shouldn’t be a problem. Try it and figure thr current needed for .15 nickel snd will also depend on the cell. I think like 15- 20 is my guess
You have to calibrate when u first get it I’m pretty sure. Easy to do though. Go to calibrate, it measures “open” when u push the button, then push the electrodes together and push the button for “short”. Done.
Thnx!,) perhaps can i find a “User manual” ? Its Ware simpler:)
all the manuals are at our product pages under www.keenlab.de . There should have been a paper leaflet in the box as well, pointing to these.
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What J setting are people using with .3 nickel?
Thanks,
MM
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Thnx for everybody! i will nickel to batterie with 20 and nickel to nickel 30j. (With kcap und ksupply) :)))
@tatus1969 Hey, don’t know if you are planning another hv version of kweld, but you probably have some ideas in the works for the future, what do you think of adding a switch to the welder but only for the “control electronics” so the high currents don’t go through it, the idea behind this is that when I finish welding my kcaps keep the welder on for like 12 hours and the beeper is buzzing for the last few volts.
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No HV (high voltage) version, but a HP (high power) version 
But I’m currently fully occupied with customer projects, probably throughout the entire year. Not sure when I have time for that… A standby function, better LCD, integrated cap + charger, and other features are on the list.
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It was a typo I meant hardware version 
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So I bought a k weld couple of years ago and was spot welding a another battry the other day. I was having the normal issue of short leads and decided I wanted a longer left lead. (You know the one that has to do a 180deg turn over the KWeld and swoop back around to the thing your spot welding. (@tatus1969 if you ever redesign this pleas make it so the welding leads come out 1 on each side. 2nd is the jog wheel has 1 position it fails to read intermittently some thing like every 8 positions. unsure if this is programming related or I got a bad encoder. but that are the only 2 miner things and is my go to over any other diy welder)
Set the idea on 600mm (left) and 400mm (Right) leads would be a ideal length
Looking thro the manual see what I’d need to calculate the cable length if I should upgrade the cables to AWG6 or if it need to be a little longer to keep the resistance with in tolerances. After a dozen packs built my 2x 3s 6AH Garphene packs only do average 1350A welds down from the 1600A that use to so looking to add a 3rd.
(The up side is now with the lower Amps my Lipo XT90 don’t get as scolding hot as thay use to and my probes get hotter letting me know to take a brake)
I’m thinking
3*XT90M-AWG10(50mm)-XT250F
XT250M-AWG6(50mm)-16mm by 10mm Lug
AWG8-600mm
AWG8-400mm
Any one else develd down this rout yet?
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What’s the max amps the kweld should do? I thought was 1000 and would do an overcurrent if went beyond that. Or was it 2000?
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2000A max limit
1500A recomended
800A abs min 1000A recomended min
My Calculations to see if I could exceed the limit
Kweld Resistance X Max Amps = Voltage required
0.0042ohm x 2000A = 8.4v
3S Max Voltage – required Voltage = Excess Voltage
12.6V-8.4V= 4.2V
Excess Voltage / Max Amps = Requiered Resistance from Baterys
4.2/2000=0.0021 (2.1mOhm)
6AH Turnigy Graphene 7 mOhm 3 in parallel
(1/7mOhm)+(1/7mOhm)+(1/7mOhm)=0.429
1/0.429=2.331mOhm
0.231mOhm spare
Kweld resistance + battery IR
0.0042 + 0.0023 =0.0065
Max Voltage / Resistance = Total Max Amps
12.6 x 0.0065 = 1938.46A
this was to close to the limit originally but I can add resistance of
- older battery’s
- AWG6 added resistance
- extra connectors resistance xt90’s and XT250
- betrays state of charge
- AWG10 and Battery adaptor cables
make me confident I have enough headroom no never exceed 2000A
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This is how short my battery leads has to be to complete the calibration
Its putting out around 1800Amps. I recommend a battery like this even if its fu**** heavy xD
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How thick of nickel can you weld with a battery like that?
Well technically the kweld can only deliver a max of 100 J so it would just be a matter of how many welds that massive thing could do without having to be charged lol
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