Search found 3116 matches

by Kepler
Jun 08 2019 7:55am
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 335
Views: 40493

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

At this stage I haven't done the combination of PAS and hall brake switches. I do have a PAS sketch and a separate hall brake sensor sketch though. Wouldn't be too hard to combine the sketches. I am not programmer though and use Visuino to write my programs. I could send you the Visunio files if tha...
by Kepler
Jun 06 2019 12:46am
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 216
Views: 12529

Re: My RC Mid Drive with Single Stage Reduction

I would recommend a wattmeter. They provide lots of interesting data, and are fun to watch if the ride gets boring. What about connecting the hm-10 Bluetooth module to vesc? Then stream all logging data to smartphone and possibly change settings also. I bought the hm-10 but didn't have the time to ...
by Kepler
May 28 2019 7:20pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 335
Views: 40493

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

aethyr wrote:
May 28 2019 12:40pm
I would like at least 2 brackets. Let me know when they're available
No problems, will let you know. Still waiting on parts from the laser cutters but I will have plenty of stock once these part arrives.
by Kepler
May 28 2019 7:17pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 335
Views: 40493

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

Hi Kin, S06 has plenty of torque to maintain engagement. I have found that as litte as 100Ws will keep the motor engaged. I would suggest problem lies with the setup geometry. Dont have motor pushing too had into the tire. With the motor fully engaged, you should be able hold the motor still overcom...
by Kepler
May 04 2019 1:51am
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 335
Views: 40493

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

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...
by Kepler
May 04 2019 1:34am
Forum: E-Bike Non-hub Motor Drives
Topic: Kepler Friction drive comes of age.
Replies: 376
Views: 55444

Re: Kepler Friction drive comes of age.

Its been a while since I have done any updates on project. Plenty has been happening with a new bike now in the stable using the friction drive. This is my stealthiest setup yet. Bike is a 2018 Trek Domane ProjectOne SLR7. Beautiful bike to ride and now even better with a light assist. All electroni...
by Kepler
Apr 17 2019 4:49pm
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 216
Views: 12529

Re: My RC Mid Drive with Single Stage Reduction

It sounds like you are describing functions that are automatically taken care of by a torque sensor. Perhaps it depends if you're coming from a moto or bicycle background which is more intuitive and natural. With a torque sensor all you have to think about IS pedalling and braking and rarely both a...
by Kepler
Apr 17 2019 4:21am
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 216
Views: 12529

Re: My RC Mid Drive with Single Stage Reduction

Personally I think torque sensing and even a throttle is unnecessary on a low powered assist setups like this. When riding single track, reactions need to be instinctive. Pedal and brake are plenty to think about when tracks get fast and technical. I think you are are on the right track with conside...
by Kepler
Feb 24 2019 8:35pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 107
Views: 8169

Re: Full suspension mountain bike Friction Drive

A couple of months have passed and I have been using this bike most days. Finally wore out my first tire after 2500km. Although happy with this, I think I would have got more out of the tire if I had set the motor to tire contact more firmly so as to avoid any slip. I have been debating the pros and...
by Kepler
Jan 30 2019 9:33pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 335
Views: 40493

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

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 bu...
by Kepler
Jan 22 2019 5:50pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 335
Views: 40493

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

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.
by Kepler
Jan 10 2019 12:23am
Forum: E-Bike Non-hub Motor Drives
Topic: Kepler Friction drive comes of age.
Replies: 376
Views: 55444

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: 335
Views: 40493

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: 107
Views: 8169

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: 335
Views: 40493

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: 335
Views: 40493

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: 107
Views: 8169

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: 107
Views: 8169

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: 107
Views: 8169

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: 107
Views: 8169

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: 107
Views: 8169

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: 376
Views: 55444

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: 107
Views: 8169

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: 216
Views: 12529

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: 107
Views: 8169

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...