Recent content by Alcus

I use two fuse wires for each weld. that would be similar to using a nickel strip with the slit forcing the current to flow though the cell. Then I choose the cleanest weld and remove the other wire.

The clear shrink wrap is a great choice. Looks really good and very practical. Looks like a much greater crimping area. How many mm does the cable insert into the revised holder? PS - I had no difficulties welding 40AWG and 30AWG thinned copper strands onto 18650 cells. It was actually...

When I first received my two kCaps, my results were very poor. Around 3.1mOhms at calibration with original cable dimensions (1M) and very low amperage when welding. Even with the setup below, the results were bad and inconsistent. With good advice from Frank, I quickly soldered the copper...

It looks to me like the bullet connector is no longer used with the revised system. The following is from the online shop, "...requires access to a suitable crimping tool with inserts for 6.5mm diameters...". I'm thinking that you cut off the old bullet connector and crimp on this new copper...

Received the two kCaps yesterday. Looks like 4 cables at 225mm each should allow enough clearance for two kCaps wired in parallel feeding one kWeld. +-1,250mm total cable length using one kCap and +-1,700mm when using two in parallel. I seem to recall the limit is somewhere around 2M due to high...

Great! Close was my goal :) From the calculations using your spreadsheet we are looking at +-1493 amps at 3S 4P. Allowing pulses of up to the kWeld maximum of 500 joules while still under the 2000A limit and within the 250ms limit. Please let me know if I have made any mistakes or if you...

By "having the power", I mean that I did not bother buying a decent battery. I was not comfortable using "prismatic" cells, I didn't want a big car battery on my desk and chose to wait for kCap. I'll be testing one kCap and two kCaps in parallel. If you recall a few months ago you shared your...

Thin wire - Until that person answers, here are my two cents: I strip good quality silicone wire such as what is supplied with kWeld to get +-40AWG thinned copper wire. A length of 8AWG should yield about 1650 strands, 16AWG 252 strands, 30AWG 11 strands, etc. I'm expecting that should fuse...

Hi Frank. I see the new C14500 (tellurium copper) CNC’ed electrode system in your shop. Looks very interesting. Can't wait to get more details on that. Do you expect that this will perform better when spot welding thin copper wires?

Great job adapting to the higher power. Thanks for sharing.

quote=tatus1969 post_id=1377122 time=1525293637 user_id=53006] I am thinking of an alternative use as a high current 0..12V 0..80A bench supply kit to widen the application range of it. That's a really good idea. Can't wait to see that.

That's a similar setup to what I was thinking of doing. I was planning a HP DPS-800GB Power supply, 20A DC to DC converter set to 8.1V and to improve the repetition rate, I was thinking two capacitor banks in parallel. With the lost energy reduced by the two banks in parallel, I am hoping for a...

That sounds great! Definitely more than I'll ever need. Can't wait to get mine.

I know what you mean :wink: If you're quick and have the right tools, then it can be done in less than one hour. Well, it took me a little longer than that so I have no bragging rights :( Much longer! Having said that, it was fun the whole time :) I ran into a couple of delays that I...

Hi everyone. The following is a set of questions and answers that others may find helpful. To keep it a little shorter, I have removed some irrelevant text denoted as (…). …laser-cut housing for the kWeld system. I have just finished adding the respective section in the system’s assembly manual...