Endless Sphere

@tatus1969. Perfect. Thanks for info! This is a well documented thing and there is a paper (among several) from a Chinese searcher in a university I can't remember, detailing scientifically his findings. I will post a link to it soon. Traveling overseas now with only my phone and missing my desktop ...

Question for Kweld's designer: Do you have any plans for adding a function in a future release that would switch the polarity half way through the welding cycle? As I am sure you know, DC spot welders don't form a similar nugget under the anode and the cathode for reasons we do not need to get into ...

I've had good success with this seller: https://www.aliexpress.com/item/18650-Lithium-ion-battery-nickel-strip-0-15-8-0-3-8-0-15-10-0/32832222955.html?spm=a2g0s.9042311.0.0.2dd94c4dOjccJ1 Still using a 1kg roll of 0.15 x 7mm I bought several years ago (nearly used it all now), and I just ordered a ...

No worries :) On a different note, I've never been a huge fan of the large copper tips supplied with my JP. They do the job, but make pinpoint close welds difficult. I prefer a much smaller point at the end so I tried various things like filing, grinding with a dremel, but nothing I tried was very ...

That's strange then. About the only other things that come to mind are using enough pressure on the electrodes, making sure the nickel surface is clean and free of any contaminants (like oil), and maybe the electrode material. I use solid copper wire for electrodes on mine and get great results wit...

I've had good success with this seller: https://www.aliexpress.com/item/18650-Lithium-ion-battery-nickel-strip-0-15-8-0-3-8-0-15-10-0/32832222955.html?spm=a2g0s.9042311.0.0.2dd94c4dOjccJ1 Still using a 1kg roll of 0.15 x 7mm I bought several years ago (nearly used it all now), and I just ordered a ...

That's what I originally thought and figured that by buying this battery (brand-new) for the JP welder, I would be all-set: OptimaYellow Top Deep Cycle Battery, Group Size 31T, 900 CC. https://www.optimabatteries.com/en-us/yellowtop-deep-cycle-battery Manufacturer claims an Internal Resistance of 0....

Has anyone found a good supplier of "pure" nickel strips (not the nickel-plated steel kind) 0.20 mm thick X 8 or 10 mm wide? I bought some through aliexpress but I am afraid they are made of some alloy that causes the electrodes to stick big time. I have tried different electrodes material and thick...

48v is too much. 12v is about the maximum. Consider that on mine, I measured about 3,000A during the pulse at 12v. There has been some success using gigantic capacitors and a 12v supply. The average power is not that much so the caps can get recharged with a reasonably small 12v supply. Fletcher, H...

48v is too much. 12v is about the maximum. Consider that on mine, I measured about 3,000A during the pulse at 12v. There has been some success using gigantic capacitors and a 12v supply. The average power is not that much so the caps can get recharged with a reasonably small 12v supply. Fletcher, H...

"48v is too much. 12v is about the maximum. Consider that on mine, I measured about 3,000A during the pulse at 12v. There has been some success using gigantic capacitors and a 12v supply. The average power is not that much so the caps can get recharged with a reasonably small 12v supply." Fletcher, ...

I just wanted to add that it isn't all that hard to build one of these spot welders as you see in the video. If you want to use it with a battery, they have someone who programmed an Arduino nano to control the pulse time. The software and programing is on the internet and you can download it and e...

Here are the pics of the jig I made to allow me to quickly (literately, about 2 seconds) and consistently cut a slit on the nickel strip. I know it looks over the top but I had this wonderful phenolic material and a Weecher rotary tool with a straight wand that is great for holding it in a similar f...

Really cool and impressive builds posted recently! My findings on electrodes sticking may not apply to too many configurations out there but I thought I post them just in case it helps someone out of new things to try to resolve it. I did not have much sticking problem with 0.15 mm pure nickel but w...

okashira, Pretty impressive work; it is great that someone is taking the time to research and optimize the design to prevent avalanche damage. One question for you about the white welding cable attached directly to the welder (showing in the picture before last). Is this the crazy-flexible silicone...

okashira, Pretty impressive work; it is great that someone is taking the time to research and optimize the design to prevent avalanche damage. One question for you about the white welding cable attached directly to the welder (showing in the picture before last). Is this the crazy-flexible silicone ...

From the DIY spot welder website Electrical data Weld current: 1100A or 400A Open voltage: 2.6V Mains current during the weld pulse: 14A Quiescent current: 1.6A Maximum welding thickness Light duty portable spot welding guns have a welding current of at least 4000A , which allow welding of 2 x 1mm ...

Thread tl;dr. That was probably me. I bought 4 of these: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=19153 And the welds were great. Nice, clean, strong nuggets but I haven't build any packs yet. Ran into electrodes problem and haven't had the time to build me a nice set. Ord...

Thread tl;dr. Earlier in the thread someone was gonna use HK Lipo rather then car battery for the welder. Did that work out? What kind of Lipos was in use and how many welds could be done before needing to charge the Lipo? That was probably me. I bought 4 of these: http://www.hobbyking.com/hobbykin...

Yes, you won't ever get electrocuted by this welder but there are hazards to be careful of. Always wear eye protection. If the FETs blow, you might have some wires getting really hot, creating a burn/fire hazard. Some kind of slow blow fuse might be a good idea. A fuse is a great idea. What value s...

Nice 'scope, okashira. I have been thinking to try one of those software oscilloscopes you install on your PC and connect via the sound card but have not had time to play with that. Wonder if anyone has used one of these to get readings from the welder. I know they have several limitations one of t...

Nice 'scope, okashira. I have been thinking to try one of those software oscilloscopes you install on your PC and connect via the sound card but have not had time to play with that. Wonder if anyone has used one of these to get readings from the welder. I know they have several limitations one of th...

Perfect! This is what I needed to make sure I do it right the first time.
Thank you, okashira

While my welder is working fine right now using 0.15mm and 0.2mm nickel strips, just to be prepared for 0.3mm later on (and being the tinkerer I am) I decided to get the diode okashira suggested and it arrived today. http://www.mouser.com/Search/ProductDetail.aspx?R=DSA300I45NAvirtualkey65120000virt...

Can we get some more details on this? I may have to increase my current because I want to weld .3 nickel. If placing a simple diode will help me increase my current without blowing my fets then I will do this. Just need more information about this and if it really works? How much current can you no...