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  1. endlessly_ending

    Kepler Friction drive comes of age.

    That helps, THX
  2. endlessly_ending

    Kepler Friction drive comes of age.

    I'm not familiar with those tiny motors used in friction drives. What ampere limits would you possibly chose for this motor? https://flipsky.net/products/6354-190kv-2450w-2
  3. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

  4. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    Ready to share a beta version of the fully working Arduino code It is tested to work both in TinkerCad and on the bench Have fun :) /* Electronic gear shift for Rohloff Speedhub and other gear hubs Arduino Nano V3 ATmega328 (old bootloader) ver: 270_V14 status: BETA TESTING platform: Arduino...
  5. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    This one seems to be the right gear for 25T Hitec / Futaba spline: Hitec ROB-12231 https://www.servocity.com/32p-25t-3f-spline-servo-mount-gears http://vionics.co.uk/index.php?route=product/search&search=ROB-12231 lets see what comes out :)
  6. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    Disassembled the ex transfer box to have closer look, if a possibly even easier approach could lead to a good solution. The brass thread was tightened strongly, but is not glued. As I happen to have a 32T gear for servos and the driving gear of the Rohloff ex transfer box is 32T as well...
  7. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    Ah, now I understand. Sorry You may have missed the link given above: https://www.robotshop.com/uk/actobotics-90-quad-hub-mount-e.html So yes, the rectangular off the shelf aluminium part was turned down to roughly 25mm outer diameter to fit. As the outer diameter is not any critical, one...
  8. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    An even more complicated approach to the one above would be to replace the driving gear by a bigger one to allow to use 270° servos Those gears from Robotshop do not exactly match modulus but metric / imperial matching in this case may be close enough to do the job. Downside here also is...
  9. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    Another approach might be to directly drive the gears inside the Rohloff ex transfer box The brass holder for the needle bearing can be screwed off and the driven gear wheel is press fit on its shaft. With minor machinery the gear wheel and the servo hub horn may be brought together...
  10. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    Now that the first test went well, there is time to ponder the other alternatives I was tinkering. Though the solution shown above is very simple an can be realized by almost anyone, the added bulk at an exposed place may be a less elegant solution. One way to overcome this may be to stay with...
  11. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    No such machine park accessible for me, sadly Exorbitant costś and delivery time of pro-shops for custom machined parts are the second reason. I hope though, others will chime in and possibly provide their expertise and skills to improve where I fall short for one reason or another, so...
  12. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    reality check http://www.74hc.co.uk/the-all-new-servo-tester/ First tests passed positive with an breadboarded Arduino. :) The shown servo tester from 74hc is of great help. Nick Ward even did a custom made version with extended PWM range for me. Thanks!!!
  13. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    https://www.rohloff.de/en/experience/technology-in-detail/modular-parts-system/ https://www.bike24.com/p235419.html?q=EX+transfer+box++ https://www.robotshop.com/uk/actobotics-90-quad-hub-mount-e.html https://www.robotshop.com/uk/load-bearing-servo-block-hitec.html...
  14. endlessly_ending

    Electronic gear shift by Arduino servo for Rohloff Speedhub and others

    With this thread its my intent to trigger a DIY solution for electronic gear shifting of hub gears like the Rohloff, Alfine, Nexus or others. To my surprise such a thing is still not available as a DIY kit / solution, though technically a rather simple thing methinks :). So I'd like to share...
  15. endlessly_ending

    Open Source BMS Project

    Any further progress? Would you mind to share further details and the code so far?
  16. endlessly_ending

    Barron Greig's MAX14920 Based Perfboard BMS

    I for one would highly appreciate that!
  17. endlessly_ending

    Adaptto Mini-E/Max-E Owner's Thread

    Hi I have problems with updating the firmware using an XP machine. The tool downloads and can be opened either as user or as administrator. FAT32 formatted SD card is recognized and written in the first line. Second line I cant decipher - just hieroglyphics in there. No matter if I press first...
  18. endlessly_ending

    Xiongda 2-speed motor

    Great, thanks for sharing the good news!
  19. endlessly_ending

    Xiongda 2-speed motor

    Thanks, that makes all lot of sense to me! Very interesting. Is that 48V version also available as a front motor version with 100mm (possibly without disk brake)?
  20. endlessly_ending

    Xiongda 2-speed motor

    at more or less comparable wattage?
  21. endlessly_ending

    2 Speed Xiongda hubmotor

    Infinion controllers also can be arranged to do reverse. No problem. But non does the trick of auto switching gears. @ panurge Sorry about your bike!
  22. endlessly_ending

    2 Speed Xiongda hubmotor

    Good to know you made an attemt to get LiShui guys on the right track. Lets hope it helps some. Their sine and FOC sine controllers are basically a very good solution and reasonably priced as well. If they open the door to customer programming - either via KM5s display, which already could make...
  23. endlessly_ending

    Eurobike 2014 thread

    Not to clutter the Eurobike thread with too much of XiongDa I did answer over there: http://endless-sphere.com/forums/viewtopic.php?f=3&t=58490&p=941594#p941594
  24. endlessly_ending

    2 Speed Xiongda hubmotor

    Might be better to coninue XiongDa matters here? I think there is no reason to "feel guilty" - it would have happend anyway. IMO the XiongDa 2-speed is the real shooting star of this year and I'm grateful to d8veh who brought it to my attention. It might take some time for bigger companies...
  25. endlessly_ending

    Eurobike 2014 thread

    Well, if Bafang (and others) gets interested in selling two speed hubs - and certainly they now will - XiongDa "family startup" most certainly will get lost - if - they are not only into developing 2-speed hubs, but the most clever business strategy on earth as well.
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