Kepler Bottom Bracket Friction Drive For Sale (Finally)

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Kepler   1 GW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Kepler » Dec 23 2018 2:36am

Hi Trigger3. Yes still got a couple of units left from the last batch. Will send you a PM.
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Adried   10 mW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Adried » Dec 23 2018 6:03am

Hi Kepler,

Can i buy a throttle interface with pass activation from you?
My own pass censor in combinatie with rc servo does nog worden fine.
I hope you can help me, i have working a long time with this problem with no good results.

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Kepler   1 GW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Kepler » Dec 25 2018 1:44am

Sure, I can supply this but it is setup for a Vesc which can be calibrated to match the Arduino output.

I am happy to send you the Visuino file if you like. You can then modify the ms output to suit your setup.
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Adried   10 mW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Adried » Dec 25 2018 3:28am

Yes , it is for a vesc 4.12 with friction drive . I would be verry happy if i can buy a plug and play throttle interface from you.
Yesterday i have removed my pedelec setup , now back to basic .

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by bigun » Jan 06 2019 6:21pm

Hi Kepler,
I am impressed with your work, and am interested in purchasing one of your kits. I plan to install on my Novara Mazama. It seems my BB to tire distance is within range, see picture.

My plan is to ride mostly unassisted, but for longer rides I plan to take a battery with me, in a Topeak case on the rear rack. I have several Ego "56V" packs (14s 18650) that I'm hoping to use for this purpose. Not sure if this voltage is within range of the RC motors that are typically used. If not, I'm open to other battery options.

Can you reply with thoughts on the battery, and PM with a kit option cost?
Thanks!
Image
Image

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Kepler   1 GW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Kepler » Jan 07 2019 6:59pm

Unfortunately I am completely out of stock. I am looking to do another run of drives next month at this stage.

Sorry about that.
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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by bigun » Jan 07 2019 9:50pm

Kepler wrote:
Jan 07 2019 6:59pm
Unfortunately I am completely out of stock. I am looking to do another run of drives next month at this stage.
No problem - please add me to your interest list. In the meantime I will try to get smarter on available friction motors and the battery options. Thanks.

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by nlhaines » Jan 22 2019 12:21am

Will this work on a hardtail mountain bike if the BB to tire distance is in range?

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cal3thousand   1.21 GW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by cal3thousand » Jan 22 2019 5:34pm

nlhaines wrote:
Jan 22 2019 12:21am
Will this work on a hardtail mountain bike if the BB to tire distance is in range?
It should, if you are running street tires and not knobby dirt tires.




@Kepler: Put me on the list for the next batch
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Kepler   1 GW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Kepler » Jan 22 2019 5:50pm

Thats correct, it will work fine as long as the tire selection is correct. For quite operation, the centre of the tire needs to be smooth. There are plenty of hybrid tires that also work quite well.

cal3thousand, I have placed you on the list.
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ModeratelyFastF   10 mW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by ModeratelyFastF » Jan 26 2019 1:01am

Still watching this in the hope I have a suitable bike at some point (I'm thinking of a stealth single speed ebike that looked low key enough to safely lock up in a big city without getting knicked).

A question: are there any build threads around? I know all about Kepler's results, but I'd like to see how average punters have got on putting a Kepler build together and what their experiences have been using it.

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Aeron » Jan 30 2019 4:50pm

ModeratelyFastF wrote:
Jan 26 2019 1:01am
A question: are there any build threads around? I know all about Kepler's results, but I'd like to see how average punters have got on putting a Kepler build together and what their experiences have been using it.
It's not a proper thread and I didn't really use the drive, but I'm an average bloke with a not so average bike to mount the thing on.
I initially could not mount it on the crank side because of the chain line (1x10 drivetrain), but the non-crank side was no better because of my bottom bracket (BB-7700).
However, it fits on the seat tube, using motorbike handlebar thingies as tube clamps. I had to machine a couple of M10 to M4 adapter (they are glued in the M10 adapters of the thingies and the drive's mounting bolds threads in there) but it's almost plug and play.

Image
Image

It is roughly adjusted, and I hope the slightly off-centered motor won't be a problem. For those having trouble with the bottom bracket mounting option, it may be an alternative.
Last edited by Aeron on Apr 17 2019 3:38am, edited 3 times in total.

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Kepler   1 GW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Kepler » Jan 30 2019 9:33pm

Nicely done. This was the reason I made main mounting plate in two halves.

Just one thing with this mounting position, you will need to move the pivot point further to the front of the bike if you want it be able climb the tire.
IMG_20190127_143608_Kep.jpg
Alternately you can leave it where it is but in permanent contact with the tire adjusted so it doesn't slip
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Aeron   10 W

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Aeron » Jan 31 2019 1:10pm

Thanks for the advice. The motor currently does not touch the tire (but is very close). For now, I will leave it there, because it would be a headache to move it forward.

I would have to drill and tap the brackets, which is the easy part.
The spring adjustment system cannot fit much forward, and I unfortunately cannot put it on the "outside" (in the pictures, it is "inside"), otherwise the motor would be too much on the left of the bike and would not touch the tire anymore. That means I would need to mill the brackets, which I don't have the proper tools for. So I hope the small margin I have to lower the motor will be enough :)
Kepler wrote:
Jan 30 2019 9:33pm
This was the reason I made main mounting plate in two halves.
And that is, to me, one of the best things on that unit's design: it is very adaptable to any frame/motor :thumb: (and even a normal frame with weird components)

Aeron   10 W

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Aeron » Feb 08 2019 12:58pm

Aeron wrote:
Jan 31 2019 1:10pm
Kepler wrote:
Jan 30 2019 9:33pm
Just one thing with this mounting position, you will need to move the pivot point further to the front of the bike if you want it be able climb the tire.
For now, I will leave it there, because it would be a headache to move it forward.
I just understood why I would not work... :roll:
I'll try to place the drive above the wheel (as I have more room for it to move around), hopefully it'll work.

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by bigun » Feb 09 2019 3:56pm

Still interested in buying. PLease update if you have an estimated date for the next batch, thank you.

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Kiwi3 » Feb 13 2019 4:00am

Hello Kepler, great to read of your innovative design and dedicated testing, building a platform for the rest of us to enjoy this tech, so thank you for that! I have found a work colleague interested in doing a parallel build alongside me, though he has yet to measure his frame to check suitability, but could you please put us on your list for two mounts, and any other helpful guidance and build material you could supply to us in NZ, and let us know your ordering process? Thank you!

nlhaines   100 W

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by nlhaines » Feb 17 2019 7:35pm

I would like to be added to the list as well, for 1 kit. Thanks.

nomo81   1 µW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by nomo81 » Apr 12 2019 3:32pm

@Kepler
great work and your will to share it outstanding

please add me to the list as well, for 1 kit.
Many Thanks

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Snowman81 » Apr 17 2019 8:27pm

Please put me down for a drive if they come available again....

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Kepler   1 GW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Kepler » May 04 2019 1:51am

I am now in the process of building another batch of drives.

A few minor changes have been made and are as follows:

The bottom end stop has been deleted from the design. I found this end stop wasn't really necessary as the gravity spring took care disengagement anyway. Also found the swing arm would rattle against the end stop when not in operation and so by deleting this, the drive is now less noticeable under the bike.

This has also allowed me to make the swing arm wider which in turn makes this component less likely to flex especially with heavier motors.

The centre attachment screw has been upgraded from 4mm unbrako to 5mm. This screw is now directly threaded into the lower main plate which has allowed me to delete the threaded back plate.

Drive will be shipped with a reverse wound gravity spring for those who want mount the drive on the non drive side of the bottom bracket.

Price stays the same as always at $100 USD plus postage.
Exploded View 04_2019.PNG
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cal3thousand   1.21 GW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by cal3thousand » May 08 2019 6:15pm

Sounds awesome... I have PayPal ready :)
Get a Cycle Analyst and a Multimeter, you're still a noob if you don't have at least one of each.

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by tallbally » May 09 2019 3:55am

Hi Kepler

Have been watching this thread for a while now. Please count me in for a bracket when they become available.

May also be interested in the kit you mentioned (back in June 2018) if you are still considering it as an option. I'd be looking for fully programmed Vesc, Arduino microcontroller, Button throttle interface, metr bluetooth, pedal cadance sensor etc.
Ideally I'd like to have a 'road legal' setting which, in the UK, involves:
- 25 km/h (15.5 mph) max assisted speed
- 250 Watts (maximum continuous rated power)
- The e-bike’s pedals must be in motion for motor assistance to be provided

Is the kit something you are still considering?

Either way, I'd like a bracket!

Thanks

Steve

Padrossov   1 µW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by Padrossov » May 11 2019 8:27am

Hi Kepler,

I would love to buy a bracket as soon as it is available.


Greetings from Germany,
Padrossov

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siva707   1 µW

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Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Post by siva707 » May 26 2019 12:41am

Hi Kepler,

I would like to buy one as soon as it becomes available.

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