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RagingGrandpa

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RagingGrandpa last won the day on May 14

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About RagingGrandpa

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  • Location
    Michigan
  • EUC
    MTen3; 84V MSX

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  1. Those are two different things... This means the controller's estimate of the 'level' position has become incorrect, usually due to vibration, or sudden U-turns. The EUC remains rideable with full power available... it just feels weird that the pedal angle is no longer level. (The problem typically goes away within 5 seconds of cruising straight ahead on a smooth surface; or after stopping for 5 seconds.) "Overlean" That means your body overpowered the EUC, and it could not make enough force to keep the pedals level. If this happens due to a bump, rough surf
  2. No! Please digest this thread: https://forum.electricunicycle.org/topic/19566-responsibly-dispose-of-16x/ Any modern EUC battery pack that was submerged in water needs to be opened and inspected by an experienced person. Don't have experience with battery packs? Remove it, destroy it, and discard it! These batteries can and do start fires after getting wet. But, you had the right idea in the end:
  3. The only thing that's practical to check is: excess heat at the charging port. It may get warm but should not feel hot like a mug of coffee. (If it's hot, it indicates a poor connection, and repairing or replacing the end of the charging cord is recommended.) The controller, and its reported temperature, are not part of the recharging circuit in the Gotway Monster, so ignore those.
  4. Let's check the one I have. I measured with HS110 and EUC.World, and it did this: Peak power came a little early, with 82.5V at the EUC. I attribute this to voltage drop in the cabling and connectors, no problem. End-voltage was low at 83.5V. This is not good for daily use because it will permit 500mV of worst-case cell imbalance (that's a lot). If I used it daily, I would check if something could be trimmed internal to the charger to raise it above 84V. The charger's output stopped at 600mA. This is nicely following the 100mA/cell recommended
  5. The Sherman should be used on roads suitable for highway passenger cars. (And pathways of similar grades and surface quality.) Dirt roads are fine. Look at the surface, and ask yourself "Could a Ford Fiesta drive here?" If the answer is no, you're taking more risk. It's your property - take as much risk as you like But please don't act surprised if your motor cables melt through the side panel or your board releases its smoke, after you try to ride your 80lb street wheel up a ski slope.
  6. Location: San Diego, USA EUC: 84V Monster, >10,000 miles ridden Rider's description: "I rode in the heavy ass rain a few times and I had a wiring adapter with some smaller gauge wires, could have been a few different things, was not Gotway's fault for sure" https://www.facebook.com/groups/352845635409860/permalink/793823701312049/
  7. If you want to do this kind of riding, the C38 and C40 are excellent, buy one! No... the reason they burn is overload But I take your point: the reason they allow you to reach overload is their controls and alerts aren't set quite accurately enough to prevent you from sustaining operation at 105%. Yes, we should expect continued improvement in this area, from our EUC developers. In the meantime, the practical solution is "stop the abuse"
  8. Swapping batteries requires tools and about 30min of labor... not a practical parking-lot job. Also adds risk that you'll damage or fatigue mounts or connections that could result in crashes when they finally fail. Much safer to leave the battery packs installed and undisturbed. Time for a 2nd Sherman? Far easier to hot-swap EUC's, than hot-swap batteries Or recharge at 14A while you rest your feet?
  9. Right. We're recommending to command acceleration in some other way than 'leaning really far forward.' Other ways include: Inertia (sudden 'stomp' or 'kick' of toe pressure) Power pads (relaxing your stance makes it fast and easy to stop shoving the pads with your shins) Always better to experiment at lower speeds- grass hills are ideal.
  10. Yes. It's not a deliberate action... the controller will already be at max output, and if you keep leaning and exceed this output, the pedals start to dip. If you relax your stance (stop leaning) you can recover from it. I bet you've already experienced this with your MTen3: a sudden 'kick' at low speed will cause the pedals to dip, and as long as you don't sustain the kick, you can recover and keep riding. The controls are the same, but the heatsink assembly is totally different and not interchangeable.
  11. That's really steep! But because speeds will be low, you'll feel pedal dip and likely be able to react without stepping off the wheel. And if you fall, falling 'uphill' is about as gentle as it gets
  12. Guys. Sherman is a high speed motor. Stop the offroad hillclimb torture
  13. We can't be sure, but it sounds like a nice conservative place to start. If the 155°F alarm does sound during otherwise 'normal' riding, take it as a reminder to inspect inside the shell to confirm the fan is still working. With MSX, it took a long, arduous, 20 minute ride struggling through deep sand to melt it... nothing felt 'normal' about that torture-test ride
  14. The motor is almost certainly not to blame. To convince yourself- The motor should spin freely when the phase wires are open-circuit. You should feel notable resistance spinning the motor when any 2 phase wires are connected together (just hold the terminals together by hand). You should feel very strong resistance spinning the motor when all 3 phase wires are connected together. You could also measure phase-to-phase resistance with a multimeter (but the DC resistance will be so low that cheap meters cannot distinguish it from a short). And with the next board you t
  15. This idea is correct, but modern EUC's have taught us a few caveats to consider: It is normal for different control boards, even of the same model EUC, to measure voltage (and therefore %SOC) slightly differently. Because of this variable accuracy, one healthy Sherman may report 101V, and the next healthy Sherman report 99V, for the same battery on the same charger. This is the typical measurement accuracy for low-cost, non-calibrated voltmeters (and the similar electronics in EUC controllers), and is not indicative of a problem. (In this example, if the voltage does not reach 9
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