Recent content by tatus1969

aarrgh, again... checking, https://hobbyking.com/de_de/turnigy-graphene-6000mah-3s-75c-lipo-pack-w-xt90.html https://hobbyking.com/de_de/graphene-5000mah-3s-75c.html are shown as 'in stock' but with just a few of them. I guess I need to make more test buys soon...

yeah, good point. Any idea how to explain that to 10,000 customers? ;-)

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...

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 :-/ kWeldPro will definitely have that - automation via USB, and also a digital input/output interface for use with CNC machines...

sorry, just seeing this now. kSupply can be paralleled, so upping the current is quite easy. Two to three of them in parallel, with a server power supply for each of them, would allow for maybe 250 amps short time. Might actually be an interesting approach.

I wasnt able to progress as fast as I wanted, because we had to do firefighting for weird firmware bugs in a customer project, literally for several months in a row. Conclusion: Wireshark does not see everything bad happening on USB, but thanks to the makers of the Beagle USB sniffer we managed...

that's definitely what I am shooting at - pure copper strips on aluminium cell cans. I'll conduct a few tests soon and post my results here.

Thanks guys, you are amazing. I would never have realized that it is the peltier effect causing this. This also explains why I could never reproduce your observations - the Peltier effect depends on the material combination, and the pulse duration also appears to play a role. Now, with kWeldPro...

That will require a custom enclosure (I'll publish 3D models to start from) but is no problem. Not sure why you would want this however, as it is not the capacitance but the resistance that we need from them. The "small" ones already deliver 4500A during calibration. Also, changing the charge...

Attached is the voltage regulator. The trimmer sets the reference voltage, and V+ is the kSupply's output voltage. From that you can calculate the values. You can use R3 and R7 to mount the fixed resistors.

I had done that and tested, and found that there is no improvement. kWeld delivered perfect and repeatable results without the cleaning pulse, no matter what I do. Also the community gives me this feedback. If you keep having trouble then please contact us and we'll check your setup and guide...

The energy metering approach of kWeld (which eliminates the need of having 1 or 2 softening pulses) assumes that the power source doesn't vary that much. This is because 1500A means roughly double welding power than 1000A. Consequently you get the same variation in pulse duration. The longer the...

(english for the other guys :-) Happy to hear that, I should have roughly 10 prototypes within the next 2 to 4 months (I need to stretch my time sometimes due to other projects) and plan to start a poll once ready.

I plan to sell assembled and tested units (with EMC and safety certification later on) as well as kits. I already have a laser-cut sheet metal enclosure here on my desk, form example. There will be a kit that includes the capacitor module, and also one without. It will be possible to mount a...

That is ok for slower casual welding, but you should watch the connector's temperature while doing that.