Kepler Bottom Bracket Friction Drive For Sale (Finally)

Place for dealers to post items for sale.
reivax   1 µW

1 µW
Posts: 3
Joined: May 28 2018 9:26am

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

Post by reivax » May 28 2018 1:55pm

Hi,

first post here, I have been reading all the stuff you made and it seems to be awesome!! why buying a bafang and a very big battery for around 1200$ ending up with a 25kg bike when we can make the conversion with a friction drive for 250-300$ battery included with the bike weighing around 10-12kg or even less?!

I m interested to buy two of them too, even If I still haven t checked if my bottom brackets are compatible, don t want to miss it!

But I come from Belgium...

User avatar
Kepler   1 GW

1 GW
Posts: 3111
Joined: Nov 08 2009 9:22pm
Location: Eastern suburbs Melbourne Australia

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

Post by Kepler » Jun 03 2018 4:26am

Doesn't matter where you live. I can send drive mech nearly anywhere. :D

Apologies for the delay but I hope worth the wait. I have been busy continuing testing and figuring out how to make the drive more robust and to open up more mounting options.

So what has changed?
The main mounting plate that attaches to the bottom bracket has been split into 2 pieces. -- 3 reason for this.

Reason 1: The motor can be removed from the main mounting bracket without disturbing any of the endstop settings.
Reason 2: The split bracket creates an offset and as such provides better chainring clearance
Reason 3: Makes it easy to fabricate a kickstand mount for those so inclined to mate too the main drive assembly.

There has also been an anti rotation bracket added to the drive assembly. This bracket is designed to assist with supporting the main mounting plate and applies additional support to stop the main mounting plate rotating under forces exerted when the drive is pushing into the tire.

Will do a limited run of 20 units for starters. Pricing stays the same.
Attachments
Friction Drive.JPG
Friction Drive.JPG (69.02 KiB) Viewed 1114 times
Friction Drive1.JPG
Friction Drive1.JPG (59.9 KiB) Viewed 1114 times
Current Rides

Lightest true ebike on the planet: ON ROAD https://endless-sphere.com/forums/viewt ... =6&t=74269
eBoost on facebook: http://www.facebook.com/pages/Eboost/200306283342024/
75 Volt 6 kW FUTR Beta 29'er: OFF ROAD

User avatar
Kepler   1 GW

1 GW
Posts: 3111
Joined: Nov 08 2009 9:22pm
Location: Eastern suburbs Melbourne Australia

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

Post by Kepler » Jun 03 2018 4:31am

Developers version for those wanting to build a custom mount to suit their specific bike.
Attachments
Friction Drive1.JPG
Friction Drive1.JPG (66.48 KiB) Viewed 1216 times
Current Rides

Lightest true ebike on the planet: ON ROAD https://endless-sphere.com/forums/viewt ... =6&t=74269
eBoost on facebook: http://www.facebook.com/pages/Eboost/200306283342024/
75 Volt 6 kW FUTR Beta 29'er: OFF ROAD

User avatar
Flyin Hawaiian   10 µW

10 µW
Posts: 5
Joined: Sep 09 2014 12:35pm
Location: Santa Clara CA

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

Post by Flyin Hawaiian » Jun 05 2018 3:57am

Please add me to the list. Thanks!
Grip and rip!

dirttorpedo   100 mW

100 mW
Posts: 41
Joined: Mar 21 2017 8:23am

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

Post by dirttorpedo » Jun 05 2018 3:04pm

Can I get on the list too please?
The Commuter: 2006 GT Kustom Kruiser- 16s LiFePo4 (25ah), generic Chinese motor, Grin 48v 35A
The Trail Bike: 1999 GT XCR-3000- 20s Calibike li-ion (15ah), H3540, Grin 72v 40A

Ded   1 µW

1 µW
Posts: 3
Joined: Feb 27 2018 6:00pm

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

Post by Ded » Jun 05 2018 5:23pm

Please add me to the list!

maxmax77   1 µW

1 µW
Posts: 3
Joined: Jun 05 2018 2:18am

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

Post by maxmax77 » Jun 06 2018 11:30pm

PM sent. I have been looking into different bike options for the last ten days or so. I was convinced I would have to spend a lot more money to get a solid setup together, but this genius minimalist design gets rid of the need for all that!

User avatar
Kepler   1 GW

1 GW
Posts: 3111
Joined: Nov 08 2009 9:22pm
Location: Eastern suburbs Melbourne Australia

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

Post by Kepler » Jun 06 2018 11:41pm

No worries PM received.

Confirming that the laser cutting order has been placed so production is underway. :D Working on an updated manual at the moment that includes the latest Vesc information, new Ardunio interface, and display app.
Current Rides

Lightest true ebike on the planet: ON ROAD https://endless-sphere.com/forums/viewt ... =6&t=74269
eBoost on facebook: http://www.facebook.com/pages/Eboost/200306283342024/
75 Volt 6 kW FUTR Beta 29'er: OFF ROAD

maxmax77   1 µW

1 µW
Posts: 3
Joined: Jun 05 2018 2:18am

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

Post by maxmax77 » Jun 07 2018 10:53am

Kepler wrote:
Jun 06 2018 11:41pm
No worries PM received.

Confirming that the laser cutting order has been placed so production is underway. :D Working on an updated manual at the moment that includes the latest Vesc information, new Ardunio interface, and display app.
Checked out Ardunio.. :shock: what a cool, versatile, inexpensive instrument!

Raysur   1 µW

1 µW
Posts: 1
Joined: Jun 07 2018 8:51pm
Location: Los Angeles, CA

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

Post by Raysur » Jun 08 2018 8:49am

My search for a lightweight electric drive lead me to this page. I love your approach.

I'll definitely take one.

cbr009   10 µW

10 µW
Posts: 5
Joined: Nov 01 2014 5:37pm
Location: Canberra, AU

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

Post by cbr009 » Jun 11 2018 2:53am

Keen on one too. PM sent. Cheers

chilltrout   10 W

10 W
Posts: 69
Joined: Oct 30 2016 8:08am

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

Post by chilltrout » Jun 11 2018 9:53am

Keen! will send a pm!

User avatar
Kepler   1 GW

1 GW
Posts: 3111
Joined: Nov 08 2009 9:22pm
Location: Eastern suburbs Melbourne Australia

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

Post by Kepler » Jun 15 2018 12:06am

A quick update.

I have confirmation from the laser cutters that parts will be ready for pickup next week. So the latest design drive will be ready to ship the week after that.

Been continuing the development of the button throttle concept. I have now gone to a single throttle button only.

Logic for the single button is as follows:

Single button 2 speed throttle with throttle kill

Using a single momentary switch/button, the drive can be toggled from zero% to 50% throttle by holding the button for a minimum of 2 seconds and a maximum of 4 seconds. This 2 second delay ensures that you won't accidentally switch the drive on by bumping the throttle button.
The drive can also be toggled from zero% to 100% throttle by holding the button for a minimum of 4 seconds.
The drive can then be toggled between 50% and 100% by using a continued 2 second to 4 second button hold.
Any button push less than 2 seconds will immediately kill the throttle.




Further programming considerations
Other programing considerations are ramp times. For drive engagement, a quick ramp is needed so the torque reaction within the motor kicks or bumps the motor against the tire. This quick ramp time is maintained when transitioning between 50% throttle and 100% throttle. However, disengagement requires a slower ramp rate. This slower ramp rate allows the motor to roll off the tires smoothly and landing softly on its mechanical bump stop.

Any momentary switch can be used for the throttle adding further versatility to the setup.
Code will be freely available or you can purchase a pre programmed Arduino Pro Mini’s ready for a plug and play solution. I am considering offering the throttle button interface also for those preferring not to make their own. The latest assembly manual will also be included with any drive purchased.

Price on the pre programmed Arduino interface will be $25 USD
Price on the custom button throttle will also be $25 USD

There has also been quite a lot of enquiries to purchasing a complete package. I am seriously considering this now the design has been refined.

I would be looking to offer the following package:

1: Drive mechanics
2: 63-54 200kv outrunner motor
3: fully programmed Vesc
4: Arduino microcontroller
5: Button throttle interface with 1.5m cable
6: 1.0mm motor extension cables
7: Bike seat bag modified to accept the Vesc and Arduino Interface

I will not be supplying batteries due to the attached liability and difficulty in shipping however the drive will suit a host of 6S LiPo batteries readily available through Hobbyking of similar. And of course custom lithium Ion packs can also be used.

Price on the full package is still to be finalized
Current Rides

Lightest true ebike on the planet: ON ROAD https://endless-sphere.com/forums/viewt ... =6&t=74269
eBoost on facebook: http://www.facebook.com/pages/Eboost/200306283342024/
75 Volt 6 kW FUTR Beta 29'er: OFF ROAD

ScooterMan101   1 MW

1 MW
Posts: 1626
Joined: Oct 06 2012 4:45pm
Location: South of San Jose, California.

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

Post by ScooterMan101 » Jun 15 2018 11:31am

Kepler,

How would that motor/controller run with 7s and 8s packs ?
My first conversion ...

https://endless-sphere.com/forums/viewt ... 1#p1077497

It's 2018 already, lets get some real , improved e-bike / e-velomobile / e-motorcycle designs .

Dumsterdave   100 W

100 W
Posts: 205
Joined: May 09 2016 5:26am
Location: copenhagen, Denmark

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

Post by Dumsterdave » Jun 15 2018 1:55pm

I want a kit!

User avatar
Kepler   1 GW

1 GW
Posts: 3111
Joined: Nov 08 2009 9:22pm
Location: Eastern suburbs Melbourne Australia

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

Post by Kepler » Jun 15 2018 8:17pm

ScooterMan101 wrote:
Jun 15 2018 11:31am
Kepler,

How would that motor/controller run with 7s and 8s packs ?
No problems at all. Just keep motor kv down to no higher then 200kv.

I have a folding bike running 12S in conjunction with an 80kv skateboard wheel hub motor.
Current Rides

Lightest true ebike on the planet: ON ROAD https://endless-sphere.com/forums/viewt ... =6&t=74269
eBoost on facebook: http://www.facebook.com/pages/Eboost/200306283342024/
75 Volt 6 kW FUTR Beta 29'er: OFF ROAD

User avatar
Kepler   1 GW

1 GW
Posts: 3111
Joined: Nov 08 2009 9:22pm
Location: Eastern suburbs Melbourne Australia

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

Post by Kepler » Jun 15 2018 8:17pm

Dumsterdave wrote:
Jun 15 2018 1:55pm
I want a kit!
Would you like me to place you on the list?
Current Rides

Lightest true ebike on the planet: ON ROAD https://endless-sphere.com/forums/viewt ... =6&t=74269
eBoost on facebook: http://www.facebook.com/pages/Eboost/200306283342024/
75 Volt 6 kW FUTR Beta 29'er: OFF ROAD

newhli   100 µW

100 µW
Posts: 7
Joined: Feb 20 2010 6:38pm
Location: Melbourne, Australia

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

Post by newhli » Jun 15 2018 10:51pm

Please put me on the list thanks if you decide to sell your drive as a complete package.

Dumsterdave   100 W

100 W
Posts: 205
Joined: May 09 2016 5:26am
Location: copenhagen, Denmark

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

Post by Dumsterdave » Jun 16 2018 12:11am

I'd love one, but it really depends on the cost. I have a lot of projects going on and my wife may not want me starting a new one if it's expensive :/
What's a rough estimate of the cost?
Kepler wrote:
Jun 15 2018 8:17pm
Dumsterdave wrote:
Jun 15 2018 1:55pm
I want a kit!
Would you like me to place you on the list?

liamcaff   1 kW

1 kW
Posts: 373
Joined: Feb 17 2013 6:21pm
Location: Dublin

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

Post by liamcaff » Jun 16 2018 6:35am

Also interested in a kit - depending on the total cost. 👍

ScooterMan101   1 MW

1 MW
Posts: 1626
Joined: Oct 06 2012 4:45pm
Location: South of San Jose, California.

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

Post by ScooterMan101 » Jun 16 2018 7:44am

Great ,

Any chance you will offer the drive kit with a lower KV motor ?


I am thinking about making a small kick scooter drive using your system . ( would not need the mounting plates )
So it is possible that you could sell some of the parts ?

Kepler wrote:
Jun 15 2018 8:17pm
ScooterMan101 wrote:
Jun 15 2018 11:31am
Kepler,

How would that motor/controller run with 7s and 8s packs ?
No problems at all. Just keep motor kv down to no higher then 200kv.

I have a folding bike running 12S in conjunction with an 80kv skateboard wheel hub motor.
My first conversion ...

https://endless-sphere.com/forums/viewt ... 1#p1077497

It's 2018 already, lets get some real , improved e-bike / e-velomobile / e-motorcycle designs .

maxmax77   1 µW

1 µW
Posts: 3
Joined: Jun 05 2018 2:18am

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

Post by maxmax77 » Jun 20 2018 12:06am

https://www.amazon.com/gp/product/B075S ... TF8&psc=1
Thinking of using this battery with the kit. It's a universal setup. I have one, it's awesome. I'm for sure gonna buy this flexible 100W solar panel, unless there's something better:
https://www.amazon.com/gp/product/B07B ... 87BV&psc=1

thoughts?

jmb25   1 µW

1 µW
Posts: 1
Joined: Jun 23 2018 11:23am

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

Post by jmb25 » Jun 23 2018 11:34am

I would like to buy 1 friction drive kit, can you please send me the info or link about pricing, payment mode and shipping costs to France ?

Thanks, best regards, Jean-Marc

User avatar
tomjasz   1.21 GW

1.21 GW
Posts: 3832
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

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

Post by tomjasz » Jun 24 2018 6:18am

Waiting for more info. Sounds perfect.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

linustheyuen   1 µW

1 µW
Posts: 1
Joined: Oct 17 2017 9:07am

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

Post by linustheyuen » Jun 25 2018 8:45am

Hello! I'm interested in getting just the button throttle with a pre programmed Arduino. Would this be possible?

Post Reply