Nuvinci developer kits for cheap

Sorry if the answer is buried in this thread. Is it still possible to get one of these kits this cheap ?
The original link in 1st post is no longer good so assuming I missed the boat.
 
I hope they continue to have the developer kits. IMO an 80-100, 100 amp controller and a dev kit builds a completely street able drive train for a light motorbike.
 
it seems they stopped supporting this product, not only remove it from the website :(

i sent them 2 or 3 emails couple of weeks ago and no reply...

in the past i got reply on 2-3 day max.

have you received 2 rods [for auto and manual] in the package? i seem to be missing the manual one...
 
The auto and manual rods have different threads therfore they are not interchangeable.
 
Rassy said:
Even if the auto and manual rods could somehow be interchanged, it wouldn't work anyway. The manual NuVinci CVT requires two turns from low ratio to high ratio and the auto requires four turns from low ratio to high ratio.
Click to expand...

you can tune the software. in the main setup there is an option for the 2 turn or the 4 turn shift rod.

rick
 
E-racer said:
The auto and manual rods have different threads therfore they are not interchangeable.
Click to expand...

are you refering to the shifting or turn rod that enters the hub? If so I think the only difference is the ratio of the turns and the rest of the rod is machined the same. Therefore, allowing the hub to work with an auto rod or a manual shift rod. At least that is what they told me when I purchased it and they included a free manual rod, cabling and shift handle assembly. I requsted this because I was thinking of staying with a manual setup like I have on my current bike with N171 manual.

Bob
 
wojtek said:
it seems they stopped supporting this product, not only remove it from the website :(

i sent them 2 or 3 emails couple of weeks ago and no reply...

in the past i got reply on 2-3 day max.

have you received 2 rods [for auto and manual] in the package? i seem to be missing the manual one...
Click to expand...

You will only get the manual rod, cables and shift handle setup if you request it and then they will give it to you free. Try calling them on the phone and give them your order # and the girl will likely send you the manual parts setup for free.

Bob
 
I understand the above discussion but I don't understand how it could possibly work.

The shift rod has a "worm" gear on the inner end which meshes with a matching gear inside the hub. If either rod fits properly it will still require either 2 or 4 turns to shift from lowest to highest gear, depending on which hub is being used.

The manual shift cable system only allows two full turns from stop to stop so you could only set it up for partial gear ratios.

I know you can set parameters for the auto shift, but it is barley strong enough to shift under power with the full four turns, so would probably not like the extra force required to shift the two turn system.

I have both a manual and auto on the shelf, so I'll go check and see if the shift rods are interchangeable and report back later.
 
the 2 turn shift rod is a 4 start worm and the 4 turn rod is a 2 start. so they should interchange. at the worm end at least.

the big problem is that the other end. the auto shift rod has a square end. the manual has a spline. if you install the manual rod you have to use the manual shift assembly.

rick
 
My conclusion is that these shift rods are not interchangeable. The worm threads are cut on a different angle and the inner end points are completely different. Even if you could force the wrong one in you would just ruin the threads, probably both the shift rod and the internal ones in the hub.

Sorry my pictures are so poor. The upper rod is for the manual shift and the lower rod is for the auto shift.
 

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Thank you rassy. Pictures are better than words.
 
the 2 turn shift rod is a 4 start worm and the 4 turn rod is a 2 start. so they should interchange. at the worm end at least.
Click to expand...

Rick, I don't have the foggiest idea what you just said here. How can worm threads that are cut on a different angle both mesh with the same mate?

Edit: Okay, I had to stop and think. If the worm threads are just moving a 'pin' and not meshing with another set of threads, then they are just pulling and pushing the "pin". Even so, I'd still be careful, unless NuVinci also has rods that match at both ends but just have a different thread pitch. I.e., why did NuVinci even bother to make the ends different? It seems they could just have made the thread pitch different.

Edit 2: Okay, I tried again to carefully interchange the shift rods. They insert into the axle, but at the point where they contact the internal stuff they simply won't thread in. The manual rod won't thread into the auto hub and the auto rod won't thread into the manual hub. My advice, if you want a manual shift get one of the newer N360 models that only requires a partial turn from lowest to highest gear. I found the two full turns of the manual N171B to be a pain. If someone is interested in a barley used N171B manual shift NuVinci send me a PM.
 
yes. as Rassy and I stated these are absolutely not interchangeable.
 
I also just removed my manual rod and tried screwing into the auto kit and no go. I guess the chick that was telling everyone it could be done and suppling the rest of the parts needed to convert to a manual setup was full-a-beens unless you change out the shifing guts onside the hub. Not something I want to do.

What I would be interested in knowing is if anyone has identified the motor and gearbox being used. If Nuvinci stops/stopped supporting these things that's something that maybe needed in the future. Along with the control board.

Bob
 
If you really wanted to use the manual shifter with the auto hub, or vice-versa, you could probably easily make an adapter that would go over the endcap of the rod in question, and mate with the shifter either way. It would make it stick out a bit farther to the right, but in most cases that shouldn't be an issue, other than perhaps having to extend whatever clamps hold the shifter to the frame.


There is that disassembly thread over on the motoredbikes forum, linked I think earlier in this thread, where there should be pics of the opened-up NV. If the pics are detailed enough it may be possible to tell if the shifter internals are a pin or a meshing thread.

Alternately, might be possible to see down into the shaft hole in the hub itself to tell; I'll check that later tonite myself on mine.

If it is just a pin or set of pins, then they should indeed work with either worm thread, and then that also means you can have almost any shifter ratio you want, by making the worm-thread pitch different, up to the point that you are pushing the pins too hard for their material strength.


I thought someone had identified the motor/control board as that of a window motor and controller from a specific Japanese car (Mazda?--I forget now).
 
the control unit is a custom one. but the motor drive unit is a one commonly used on after market power window systems. i have even seen it used on some production cars in my travels through the local auto wreckers.

as with most of these things it is manufactured in China. Sunkol Automotive Corporation.

looks like the processor is an Atmel unit. but i just can't read the part number. There is a Jtag port on the board. someone with better eyesight than mine would have to trace down the pinout. and then i wonder if it would be possible to dump the code. or maybe if someone asks real nice NuVinci may be willing to part with it.

rick
 
well i have not seen it mentioned here. but it is a fact that NuVinci has not given up on the Auto-Drive for e-bikes, just the N171 Dev Kit version of it.

they now have the N360 based Harmony Drive.

anyone have more information on it?

rick
 
never mind that the N360 itself is much smaller. that new shifter unit is downright tiny.

i've emailed them asking if they plan to sell it separately or a a new DEV KIT, i hope they respond.

rick
 
I've just ordered the N171 Dev kit. Only downside for me is the HUGE shiftunit, hoping I can somehow relocate that.
N360 just isn't tough enough from what I've read, besides, the electronic version isn't available yet.

Alfine 11 Spd has better gearing range, but isn't strong enough. Also, electric version would cost me 500 eur, dev kit I ordered is 175 eur.

I just need to find a way to relocate the nuvinci motor.



Anyway:
Couple of questions.

Can I hook this up to 14s lipo?
They say controller is from 12-48V, but don't know what the margin would be.

Anybody find a good way to change between auto and manual shift? And what do you use for manual shift?
Was thinking maybe a left hand half throttle, hooked to a DC DC converter, giving 0-5V? Remove the spring, so it would stay where you put it?


What are your thoughts?
 
wannesd said:
I've just ordered the N171 Dev kit. Only downside for me is the HUGE shiftunit, hoping I can somehow relocate that.
N360 just isn't tough enough from what I've read, besides, the electronic version isn't available yet.

Alfine 11 Spd has better gearing range, but isn't strong enough. Also, electric version would cost me 500 eur, dev kit I ordered is 175 eur.

I just need to find a way to relocate the nuvinci motor.



Anyway:
Couple of questions.

Can I hook this up to 14s lipo?
They say controller is from 12-48V, but don't know what the margin would be.

Anybody find a good way to change between auto and manual shift? And what do you use for manual shift?
Was thinking maybe a left hand half throttle, hooked to a DC DC converter, giving 0-5V? Remove the spring, so it would stay where you put it?


What are your thoughts?
Click to expand...

I'm thinking it's going to be difficult moving the shift actuator. Not impossible probably, but it won't be easy and the only way that I can see to do it would be to use a flexible coupling between the motor and the shaft and I don't know if those have any twist up in them, but that would effect things too.

By the way, how did you get a dev kit? Did you get it from Fallbrook or from someone else? Last report said that Fallbrook was only holding some back for replacements for people that had previously bought them.
 
Fallbrook reput them on the website, quickly jumped on it.

Was also thinking along the line of flexible coupling. Since this doesn't have fixed gears, the twistup wouldn't really matter, as there's no need to get an exact output everytime. Any idea on where to get that?
 
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