Search found 3105 matches

by Kepler
Jan 10 2019 12:23am
Forum: E-Bike Non-hub Motor Drives
Topic: Kepler Friction drive comes of age.
Replies: 373
Views: 49076

Re: Kepler Friction drive comes of age.

I have built a custom friction drive for my full suspension mountain bike which works well in most weather. Haven't done much mud testing but for road and gravel, the setup work great. I don't think I would recommend it for extended touring around South America though. https://www.endless-sphere.com...
by Kepler
Jan 07 2019 6:59pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 306
Views: 32727

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

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

Sorry about that.
by Kepler
Dec 30 2018 2:14am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

Made some changes to the motor control so I thought I best document it as part of this thread. I have been riding with a push button throttle that simply activates the drive at full throttle when held down and deactivates the drive when released. Also have the hall sensors on each brake lever which ...
by Kepler
Dec 25 2018 1:44am
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 306
Views: 32727

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

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.
by Kepler
Dec 23 2018 2:36am
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 306
Views: 32727

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

Hi Trigger3. Yes still got a couple of units left from the last batch. Will send you a PM.
by Kepler
Dec 12 2018 11:36pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

Thanks, Most people have no idea the bike is assisted. Noise level is low also so that doesn't give anything away. With regards the grip material, sound brutal on the tire but with the low power levels I use (up to 300W) the wear is minimal. Trick is to make sure the motor is hard enough on the tire...
by Kepler
Nov 30 2018 9:27pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

With regards to ratios, you mentioned 11:1 with a friction drive which sounds logical. However reduction ratios have no bearing on friction drives. A bike with a 20" wheel will go at the same speed for a given motor rpm and as bike with 700c wheel. And would go at the same speed for a given RPM if ...
by Kepler
Nov 30 2018 9:19pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

Your work is wonderful! Excuse me for the questions, but I'm totally inexperienced in the field of RC engines. Instead I have enough experience (mechanics and a bit of electronics) in the hub engines and in the central engines. Is this system for light cyclists? unfortunately weight 105 kg :-( I li...
by Kepler
Nov 30 2018 9:00pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

Go up a few posts for further info on grip tape https://www.endless-sphere.com/forums/viewtopic.php?f=28&t=96581&start=75#p1420150 I have had the grip tape fail in wet weather due to saturation but I think it more that the Uglu double side tape failed. I have now attached it with good old 30 minute ...
by Kepler
Nov 19 2018 6:27pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

I have replaced it once within the life of this tire and that was just recently. The friction material lasts fine however I did quite a bit of wet weather operation over the past few weeks. The constant saturation will shorten the life of the friction material. Predominantly dry weather operation I ...
by Kepler
Nov 18 2018 7:47pm
Forum: E-Bike Non-hub Motor Drives
Topic: Kepler Friction drive comes of age.
Replies: 373
Views: 49076

Re: Kepler Friction drive comes of age.

Road testing of the Arduino based PAS control is now complete. Settings that I came up with on the bench translated well to the road with the assist starting in a very predictable manor. Although theoretically two turns of the crank should start the drive, in real life it takes three or four turns t...
by Kepler
Nov 18 2018 7:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

I have been using this bike for both off road and commuting duties of late and as such have been racking up some distance. I am finding that this bike is only marginally slower over the commute compared to my assisted road bike but far more comfortable and the bike can be used in all weather. Tire w...
by Kepler
Nov 17 2018 2:07am
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 101
Views: 5884

Re: My RC Mid Drive with Single Stage Reduction

FZBob, I think you are coming to the same conclusions I came to a couple of years ago. Bottom line there is no substitute for lots of copper. I have cupboard full of motors I have tested over the years. Conclusion was that if you want those Watts to translate to the ground, bigger was always better....
by Kepler
Nov 15 2018 7:08pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

Very good. The programming side becomes a hobby within a hobby. I would go with with a Nano. Nice and compact and has a built in TTL so direct USB connection. You don't have to worry about 3.3V or 5V if you are using a Nano. They handle 5V regulated which is what the Vesc supplies. IO count is basic...
by Kepler
Nov 14 2018 10:09pm
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 101
Views: 5884

Re: My RC Mid Drive with Single Stage Reduction

This motor looks like it could fit the bill.

http://epowerhobby.com/product/e-power- ... 0kv-2450w/

I like that they offer a sensorless version. Perfect for your application. And they are in stock at the moment.
by Kepler
Nov 14 2018 7:53pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

That is a really neat implementation. Nicely done. I think the whine you are talking about is coming from the tread on that tire. If you have a tire with a slick center, it would be worth trying that and see how that goes. The other thing is that I have found variations in the noise that the Flipsky...
by Kepler
Nov 13 2018 8:01pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

Hi Steph. Welcome to the conversation. This type of setup sound perfect for your commute especially considering your decent is at the end of your commute heading there and at the start going back. - instead of rubbing against the outside of the wheel, what about fixing a teeth pattern on a side of t...
by Kepler
Nov 10 2018 11:16pm
Forum: E-Bike Non-hub Motor Drives
Topic: Kepler Friction drive comes of age.
Replies: 373
Views: 49076

Re: Kepler Friction drive comes of age.

Lots of requests for pedal assist. I can see merit in using pedal assist but I like the idea of still using the single button for 2 speeds and kill but only operational if pedaling. Anyway working on the code at the moment. thought it would be piece of cake lol. Wrong!!! Anyway, got my litte test j...
by Kepler
Oct 28 2018 4:14am
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 306
Views: 32727

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

Yes, 100% regen when both brakes are applied. I used Hall sensors as I wanted it to be completely water proof. I quickly discovered micro switches dont belong on a mountain bike and quickly fail under muddy and rough conditions. The button throttle and brake sensors are connected to a custom program...
by Kepler
Oct 26 2018 9:55pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 306
Views: 32727

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

Interesting idea. if you only needed a boost to low speed, you could us a low kv motor, so 60 kv and say a high C rated 4S Lipo battery. The motor would climb the tire under load, then drop off the tire once it reach full speed which would be quite low. The motor could easily be pulled on to the tir...
by Kepler
Oct 21 2018 2:30am
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 101
Views: 5884

Re: My RC Mid Drive with Single Stage Reduction

If you were starting from scratch would you choose a lower kV motor if you had access to them? Thanks! If I was starting from scratch, and there was a good selection of 60 KV motors, I might go 8S. Same for 80KV and 6S. Just size the battery pack for the same number of Watt Hours. Got to ask, why 8...
by Kepler
Oct 21 2018 2:11am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

Running out of things I can do on this bike now :)



20181020_170031.jpg


20181020_170019.jpg
by Kepler
Oct 21 2018 2:05am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

Here is the bracket with the motor attached. (no snickers about the shape thanks :oops: ) All jokes asided, this bracket is about Mk5 and is refined to point that it can be removed from the bike by removing one 8mm nut and in about 10 seconds. Attachment takes a little longer, maybe 30 seconds. Note...
by Kepler
Oct 21 2018 1:37am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 104
Views: 5158

Re: Full suspension mountain bike Friction Drive

I think that 3M tape would work but I have never tried it. I have tried lots of different methods of attaching the grip tape and nothing works better then Uglu. In regards to belt sander material, Norton Metalite 120 grit works a treat. When you cut the grip tape tape to length, make it 2mm longer t...
by Kepler
Oct 20 2018 2:25am
Forum: E-Bike Build Threads / Photos & Video
Topic: Stealth FUTR owners builds and pics
Replies: 2165
Views: 127774

Re: Stealth FUTR owners builds and pics

Rix wrote:
Oct 19 2018 9:43am
mark 324 wrote:
Oct 19 2018 8:59am
Where is Jay at? Send pms, need order a 1 frame?
Hit him up on FB. He's in the process of building up a bigwheel 85 KTM with a potential peak power of 30KW.
Good to hear Rix. Hadn't seen any activity from him for a while and it was really starting to worrying me.