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  1. N

    Check out this idea.

    you could probably chop up and convert a little powered kick scooter or convert a weed whacker with an RC motor and use a tiny wheel. *shrug*
  2. N

    axial design/build

    seems there's no reason for me to try and build a motor..oh well. I might post a build thread in the general ebike section at some point but it'll probably be a mid-drive hub. sorry :oops:
  3. N

    Big dog vs ebike. Dog won.

    I had a mutt that could maintain 20mph for several miles and he could hold that speed up some fairly good hills. I've also had a dog that wouldn't run at all. :) :lol:
  4. N

    Estimating max torque/speed 15" dia - 3" wide ring outrunner

    oooh, magnets! :shock: 8) If I get a vote I'd say keep it simple and try to improve efficiency and performance on the next one. Once the first one is running I'm sure you'll get ideas for improvements. :)
  5. N

    axial design/build

    It looks like the rotor can be 11" diameter before clearance starts getting scary. Given that, I'll look at larger magnets and see what jumps out at me. I still have a lot to do in order to make the trike roll but it should go together pretty quickly next month. Once it's together I'll have a...
  6. N

    eBike / Generator / Power Source

    Using #25 sprockets and chain I made a simple 2-stage step up... The MY1016 motor I had came with a #25 11t sprocket. If the jackshaft had a 55t and an 11t, and your pedals spin a 55t linked to the 11t on the jackshaft, you should get a 25:1 increase..meaning 100rpm at the pedals would be...
  7. N

    Lebowski's motor controller IC, schematic & setup, new v2.A1

    lol...it's currently 0% efficient, so I don't wanna hear too much efficiency talk. :lol: motor_volume doesn't know anything about magnet geometry and layout though..? Using round or square magnets means fewer can fit on a plate. I was kind of assuming 64, 1"x0.5"x0.5" N52 magnets would help...
  8. N

    eBike / Generator / Power Source

    Most cheap brush motors make decent pedal generators if you gear 'em. I had a 250w MY1016 based pedgen for a while and it wasn't terrible. edit; wrong pic..don't do that.
  9. N

    Lebowski's motor controller IC, schematic & setup, new v2.A1

    I saw your first one and noticed the gearing, so I knew v1 wouldn't do it. It seemed pretty strong though, iirc. So what does it take to make a single stator axial that compares to an ebike DD hub?...no iron core!... :wink: I was hoping a larger diameter rotor, thicker/stronger magnets and...
  10. N

    Engine question.

    1) Make up and down action. 2) Convert that to rotation. Versus... 1) Get a motor that rotates. Which one makes more sense? :pancake:
  11. N

    Lebowski's motor controller IC, schematic & setup, new v2.A1

    It's not that simple to me. I tried reading the manual on the first page and it's gibberish on my screen. The pictures appear ok but most of the text looks corrupted or something. Maybe I'll try another reader. I appreciate all your effort, I really do -- computers don't always cooperate and...
  12. N

    Lebowski's motor controller IC, schematic & setup, new v2.A1

    I think they make it look too easy. I tried reading most of it but it seems kind of cluttered with tuning/revision info. I'm lost. I still want to build an axial motor but if I can't figure out how to drive it then it may end up being a generator instead. :oops:
  13. N

    AM dual motor = bafang middrive + rear hub motor

    I'd plan to convert the carbon bike since the total package would be that much lighter, but I'd get the kinks worked out on something cheaper first.
  14. N

    axial design/build

    I guess they didn't want to cut a 1' x 2' piece of steel, so I can't start on the magnet plates. The person I talked to on Saturday made it sound like I just needed to have someone come back on Monday to get a piece cut because the guy that does the cutting wasn't there. I knew I should've hung...
  15. N

    Acronym Contest

    TURBO.. This Used to Run a Boat, Ok? :lol:
  16. N

    axial design/build

    Coreless, yep. And I binned the idea of doing a smaller one first. Nice, right? :lol: Now I'm shooting for a 9" dia rotor w/ a lot more magnets. I've got it drawn for..eek..32 per side, but I'm still open to suggestions for the final magnet count and layout. In order to save money I'll switch...
  17. N

    axial design/build

    The bearing showed today and it's plenty big enough. :mrgreen: Hopefully I can get some steel tomorrow and have a decent start by the end of the weekend. :)
  18. N

    Running different sized batteries in series?

    I'm pretty sure he meant in a battery pack with other cells that are fully charged.
  19. N

    axial design/build

    They shipped the bearing Tuesday so hopefully it'll show up in the next couple days. This weekend I'm gonna try to get the steel and some supplies so I can start building the frame and rotor. :)
  20. N

    axial design/build

    Interesting but I'm definitely starting w/ acrylic since it's easy to find, relatively inexpensive and seems like it'd be easy to work with.
  21. N

    axial design/build

    I drew the basic view on paper and an 8" rotor diameter would give me a lot more clearance around things. With a larger rotor diameter and a craftier clamp and frame design the entire motor including shaft could be made around 4-3/4" wide. :shock: The bearing and shaft is drawn to scale as best...
  22. N

    axial design/build

    I'm not too worried about magnet cost but I want good value for my money and a high temperature rating. I looked at round magnets and they seem slightly more expensive than a similarly sized block magnet and high-temp rounds would cost that much more if you can find them. I'm not considering...
  23. N

    axial design/build

    Actually your builds are what inspired me to want to try one. :D Acrylic is the backup plan, for now. I kind of want more head room though since the mags can take up to 300° F. Pliable comes before "melting", right? :)
  24. N

    axial design/build

    Stator materials is where I'll definitely need help. What's gonna withstand up to 300° (F)? :twisted:
  25. N

    axial design/build

    Hole in the center of the stator. A fairly large hole I guess but the coils need to fit too. :wink: oh!...sorry, I forgot to mention the "stator.pdf" file is only a scale-able 9 piece pie and not a representation of a stator or a plan for one. :oops: But 9 coils means each coil can occupy, at...
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