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  1. C

    Weld 2P battery in an X pattern?

    Hi there, I'm building a 14s2p battery. I was wondering if there's any reason I couldn't weld the nickel strips in an X pattern, like shown in blue, rather than a typical rectangle as shown in green? The reason is, it would reduce the number of strips I need to weld (2 strips per quad, rather...
  2. C

    Feedback on spotwelds?

    Hi all, I have this spot welder: https://endless-sphere.com/forums/viewtopic.php?f=14&t=89076 I'm powering it with a 5000mah 50C sustained 100C burst 3S LiPo, welding 0.2mm pure nickel strips onto 18650s. According to the official documentation and what I've read in forums about this welder...
  3. C

    Dropped battery, one cell dented. Trying to understand failure mode.

    Hi there, I have a 10s2p battery without hard case (just shrink wrap). I dropped it, and now the negative terminal of one of the cells in the last pair on the positive end of the battery is dented. Photo attached. I first noticed an issue when the battery voltage was suddenly so low that my...
  4. C

    TSDZ2 slight resistance, grinding sound 1 per revolution

    Hi there, I just got a brand new TSDZ2 from eco-cycles. It is working, but have noticed that the resistance when turning the cranks is not continuous all the way around. It is smooth all the way except one spot, where it has a bit more friction. It's not a huge amount, but you can feel it when...
  5. C

    TSDZ2 not reading speed

    Hi there, I got the OSF TSDZ2 kit from eco-cycles, flashed with the latest 1.0 stable firmware. Got it all put together this weekend and it works pretty well, but I'm having an issue: the speed always reads zero. I have tried: * Dis/Re-connecting the sensor * Swapping the speed sensor for...
  6. C

    Bafang G310 with Shimano 8/9/10/11 speed MTB cassette

    Hi all, I'm considering converting a 135mm dropout CX frame to an ebike using the G310 motor. The current drivetrain is a 10 speed shimano road cassette in the back. I'm not sure what to make of this blurb from the Grin info page for the motor...
  7. C

    Controller current draw vs. motor current draw

    Hi all, I'm considering doing a minimalist ebike conversion using the G310 kit from Grin: https://www.ebikes.ca/shop/electric-bicycle-kits/bafang-g310-311/rear-g310-kit-basic-throttle.html The kit comes with a 20A controller, and I was planning to do 2 x LiGo batteries. Each LiGo can handle...
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