Search found 359 matches

by zro-1
Sep 13 2018 7:23pm
Forum: E-Bike Technical
Topic: Rear Q100 on 130 mm dropout
Replies: 18
Views: 487

Re: Rear Q100 on 130 mm dropout

The ideal cadence to motor RPM balance is when you're able to be contributing power through pedaling at top speed. You'll know you're reaching that point because the motor will just be hitting its unloaded max RPM. Be ready to play with cog sizes and chainring sizes to achieve that goal. That perfec...
by zro-1
Sep 08 2018 10:27am
Forum: E-Bike Technical
Topic: Rear Q100 on 130 mm dropout
Replies: 18
Views: 487

Re: Rear Q100 on 130 mm dropout

The cog side of the freewheel Q100's shaft has a nut and 2 spacers. I had a freewheel version of the Q100 installed in my single speed bike that had 120mm dropout width. You can probably just remove the nut, and get the 5mm you need. Alternatively, you can try replacing one or both of the spacers wi...
by zro-1
Sep 02 2018 9:44pm
Forum: E-Bike Non-hub Motor Drives
Topic: Could I run a grin phaserunner and still keep higo connections?
Replies: 2
Views: 201

Re: Could I run a grin phaserunner and still keep higo connections?

You won't be able to use PAS with just a phaserunner. You'll need a cycleanalyst to use the PAS sensor.

As for the higo connectors, if you wanted to keep them, you'd probably be looking at sniping off the stock connectors and soldering in the appropriate higos in their place.
by zro-1
Sep 02 2018 9:40pm
Forum: Polls & Surveys
Topic: Has interest in ebikes increased decreased or stayed the same at your location compared to 10 years ago?
Replies: 18
Views: 617

Re: Has interest in ebikes increased decreased or stayed the same at your location compared to 10 years ago?

Here in the ATL, I see at least one other ebike every other day that I haven't seen before. There are a few that I've come to recognize as fellow commuters which I don't count as 'new'. I think it helps that we have a really great ebike builder here in town ( Edison ), but I've also seen some more e...
by zro-1
Aug 30 2018 8:16pm
Forum: E-Bike Technical
Topic: Snapped axle on Crystalyte TC100 hub motor, almost died
Replies: 31
Views: 940

Re: Snapped axle on Crystalyte TC100 hub motor, almost died

Ohhhh OK. I get it now. Sorry for being slow on that and adding noise to the thread.
by zro-1
Aug 30 2018 8:06pm
Forum: E-Bike Technical
Topic: Snapped axle on Crystalyte TC100 hub motor, almost died
Replies: 31
Views: 940

Re: Snapped axle on Crystalyte TC100 hub motor, almost died

Corrosion could have been the cause of the initial crack, but then so could have poor workmanship (e.g. sharp inside corner, flawed surface finish). I agree with this part of Chalo's follow-up. I think that point where the flats and the rest of the axle met up was the weak point. Again, just my hum...
by zro-1
Aug 30 2018 8:01pm
Forum: E-Bike Technical
Topic: Snapped axle on Crystalyte TC100 hub motor, almost died
Replies: 31
Views: 940

Re: Snapped axle on Crystalyte TC100 hub motor, almost died

I am no chemist, but in my research into electroplating and oxidation, I've come to understand that oxidation only happens at the surface, where oxygen can come into contact with the metal. Since there's rust penetrating in to where the faces of the axle were machined from the main part of the axle,...
by zro-1
Aug 30 2018 7:47pm
Forum: E-Bike General Discussion
Topic: Finished project: Super Light Carbon Ebike
Replies: 10
Views: 1168

Re: Finished project: Super Light Carbon Ebike

You fit 13s2p in that little bottle with a Rosenberger connector?! Are you using a BMS with it?

I currently have my 13s2p in a seat bag, which is fine, but if I could build a stealthy little bottle like you did (with a BMS) I'd be ordering parts right this second.
by zro-1
Aug 28 2018 9:24pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar
Replies: 331
Views: 22387

Re: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar

A HUGE congratulations to you and AnSo, Justin! I'm sure the light in your hearts out shone those (very impressive) fireworks you put together. I'm so happy for you both and wish you the very best of times on your journey together. Thank you for making this little forum on the internet such a big pa...
by zro-1
Aug 28 2018 9:09pm
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 49
Views: 2522

Re: Sensorless at standstill, development updates and status

Lebowski wrote:
Aug 15 2018 1:44am
...let alone in the assembly that I code in...
Wait. You code directly in assembly? (insert bowing emoji here) That's pretty amazing.
by zro-1
Aug 28 2018 8:54pm
Forum: E-Vehicles General Discussion
Topic: Does Elon Lurk these forums ?
Replies: 17
Views: 1094

Re: Does Elon Lurk these forums ?

Welp. Cats out of the bag now.
I. Am. Elon.
Image
:lol:
by zro-1
Aug 04 2018 11:32am
Forum: E-Bike Technical
Topic: Xiongda YTW-06 mini hub motor
Replies: 92
Views: 9649

Re: Xiongda YTW-06 mini hub motor

davideserin wrote:
Aug 02 2018 1:54am
Are you talking phase amps or battery amps?
Battery Amps.

I think max phase amps are set to 35, but I'm not 100% sure of that. It may be in one of my screenshots of phaserunner settings in my build thread.
by zro-1
Aug 01 2018 11:53pm
Forum: E-Bike Technical
Topic: Xiongda YTW-06 mini hub motor
Replies: 92
Views: 9649

Re: Xiongda YTW-06 mini hub motor

I've been running my YTW-06 at a max of 54.6V, 20A for about 90 days without issue. I need to point out (again) that I don't run the motor at that level all the time though. I use a Phaserunner which is a FOC, so the amps delivered are based on throttle. Most of the time I run at 30% throttle which ...
by zro-1
Aug 01 2018 11:00pm
Forum: E-Vehicles General Discussion
Topic: Test driving the Jaguar I-PACE
Replies: 12
Views: 635

Re: Test driving the Jaguar I-PACE

From what I've seen of online videos, one of the "EV Smile" moments people have is when they feel the torque from a standstill but with no (or minimal) noise from the vehicle. They use the phrase "like on a magic carpet". I don't think EVs should make noise for the benefit of the driver. On the othe...
by zro-1
Aug 01 2018 10:51pm
Forum: Motor Technology
Topic: Controller design and technology-why not both sinewave and squarewave?
Replies: 5
Views: 348

Re: Controller design and technology-why not both sinewave and squarewave?

OK, dumb question: How does a FOC (field oriented controller) compare to what's been described above?
by zro-1
Aug 01 2018 10:36pm
Forum: Battery Technology
Topic: Add your EV etiquette tips for the newbs
Replies: 20
Views: 633

Re: Add your EV etiquette tips for the newbs

I really LOVE that ChargePoint is here asking us for feedback. That alone is enough for me to be a ChargePoint customer when I eventually get an electric car. I am fortunate enough to work at a company that has several EV owners (more bikers and a few ebikers) and in an environment that has a limite...
by zro-1
Aug 01 2018 10:05pm
Forum: General Discussion
Topic: nominal vs. peak - is it just marketing fluff?
Replies: 6
Views: 320

Re: nominal vs. peak - is it just marketing fluff?

To clarify, I personally completely understand the real numbers and how to compute pack power/capacity, versus peak or nominal or minimal motor power. I was just commenting on what I've observed in the commercial arena.

I'm not even gong to go near the range numbers they quote... :wink:
by zro-1
Aug 01 2018 5:59pm
Forum: General Discussion
Topic: nominal vs. peak - is it just marketing fluff?
Replies: 6
Views: 320

nominal vs. peak - is it just marketing fluff?

So I've noticed a pattern amongst commercial ebikes where the motor power listed is often something like "nominal power" or "rated power" expressed in watts, and the battery capacity is often expressed in "max capacity" in watt-hours. I've also seen a few cases where "experts" on ebikes have stated ...
by zro-1
Jul 26 2018 8:25pm
Forum: E-Bike General Discussion
Topic: Help with ebike presentation
Replies: 26
Views: 531

Re: Help with ebike presentation

I have to say that teklektik's post is the best advice for this particular crowd. The company I work for lets employees give "night school" classes where they can talk to fellow employees about something that they love. I've been approached twice about giving a class on ebikes * . I think I'm going ...
by zro-1
Jul 26 2018 8:09pm
Forum: E-Bike General Discussion
Topic: Help with ebike presentation
Replies: 26
Views: 531

Re: Help with ebike presentation

And beware the "e-bikes are cheating" attitude I always like to respond: Technically riding a bicycle is "cheating" because a bicycle gives you a mechanical advantage over a person getting along just on their own two feet. Ebikes are just the next step enabling more people to enjoy those same mecha...
by zro-1
Jul 24 2018 1:05pm
Forum: E-Bike General Discussion
Topic: Help with ebike presentation
Replies: 26
Views: 531

Re: Help with ebike presentation

Since this is a presentation to your local cycling association, they probably already know the virtues of cycling vs driving. Perhaps you can differentiate cycling for sport/exercise vs cycling for utility and commuting, and how an ebike makes that easier and available to a wider range of people. tr...
by zro-1
Jul 18 2018 9:09pm
Forum: General Discussion
Topic: Any Lawyers Here?
Replies: 28
Views: 831

Re: Any Lawyers Here?

The first rule of fight club is that you do not talk about fight club.

Signed:
...
by zro-1
Jul 18 2018 9:05pm
Forum: E-Bike General Discussion
Topic: A very interesting light ebike
Replies: 1
Views: 242

A very interesting light ebike

With the sole exception of the very low EU-friendly power levels (and the price), I think this bike has every wish-list feature I could imagine http://desiknio.com/wp-content/uploads/2018/03/URB0752.jpg http://desiknio.com/pinionurban/ pinion BB gearbox Gates carbon belt drive disk brakes internal b...
by zro-1
Jul 18 2018 8:34pm
Forum: E-Bike Technical
Topic: Powerful middrive in a carbon frame
Replies: 24
Views: 1391

Re: Powerful middrive in a carbon frame

This is looking very interesting! I'll be following along.