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  1. Oscillator Ocelot

    kWeld - "Next level" DIY battery spot welder

    December 31, 2022, I placed an order from HobbyKing for a couple 3S Graphene 6.0 batteries, and they’re *still* back ordered. All HobbyKing can tell me is that the manufacturer in Hong Kong is dealing with Covid restrictions and so things are delayed for an unknown period of time. So my three...
  2. Oscillator Ocelot

    kWeld - "Next level" DIY battery spot welder

    My Turnigy Graphene 5.0 4S 75C lipo ripped itself apart when trying to weld a 0.15 nickel 0.20 copper sandwich. Apparently it’s not recommended to go above 3S because the higher voltage of a 4S battery makes the battery work harder for the same weld as a 3S battery; which becomes a problem for...
  3. Oscillator Ocelot

    kWeld - "Next level" DIY battery spot welder

    That large ARM processor makes me think you have some sophisticated capabilities planned for that beast of a welder
  4. Oscillator Ocelot

    kWeld - "Next level" DIY battery spot welder

    Oh man, imagine the antics that would ensue if a college fraternity got their hands on something like that
  5. Oscillator Ocelot

    kWeld - "Next level" DIY battery spot welder

    So I had a suspicion about that diamond pattern and how it relates to the tab welding process. It seemed to me that in order to achieve a spread out diamond pattern after an electrical resistance weld, an elaborate cascade of individual welds would be necessary to avoid using enormous current...
  6. Oscillator Ocelot

    kWeld - "Next level" DIY battery spot welder

    Oh wow yah I bet you’re right about the Diamond pattern! That would explain the uniformity of burn marks. Nice observation!
  7. Oscillator Ocelot

    kWeld - "Next level" DIY battery spot welder

    @amberwolf Thank you for your additional insight! I didn’t know that some of the tabs are aluminum, and so are a challenge to solder. I think I’ll try spot welding them back together once my new batteries arrive (still back ordered, ugh). I’d definitely wonder if that would effectively reduce...
  8. Oscillator Ocelot

    kWeld - "Next level" DIY battery spot welder

    Sorry for my delayed reply, holiday cheer kept me away from following up sooner. @amberwolf Thank you for such an informative reply! The possible scenarios you mentioned helped me better diagnose the battery, allowing me to confidently address the problem. You were 100% correct about the...
  9. Oscillator Ocelot

    kWeld - "Next level" DIY battery spot welder

    Hi everyone! (Full details of what happened are at the bottom of my post) The lipo I was using was a Turnigy Graphene 5.0 4S 75C lipo I have a question about using two batteries vs. one battery to power my Kweld. I hope posting it in this thread is okay. I’ve been a long time lurker, and...
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