Search found 399 matches

by ferret
Apr 19 2019 12:34pm
Forum: E-Bike Technical
Topic: Cycle Analyst V3 Power vs Torque mode
Replies: 4
Views: 138

Re: Cycle Analyst V3 Power vs Torque mode

I guess power mode is more similar to ICE than torque mode because it is less effected by battery voltage drop, but the difference is usually negligible. CA limits the amount of current generated by the system by lowering the throttle signal sent into the controller then the current is about to exce...
by ferret
Apr 16 2019 3:59am
Forum: E-Bike Technical
Topic: Cycle Analyst V3 Power vs Torque mode
Replies: 4
Views: 138

Re: Cycle Analyst V3 Power vs Torque mode

Hi. You can use torque throttle mode with any controller as long as you use an external shunt. https://www.ebikes.ca/shop/electric-bicycle-parts/ca-accessories/shunts.html If you can't use torque mode then power mode won't work either, because power (Watt) is calculated by multiplying Amps (which ar...
by ferret
Apr 15 2019 9:36am
Forum: E-Bike Technical
Topic: Adjustable controller?
Replies: 6
Views: 222

Re: Adjustable controller?

If the controller has a DP CA plug, a DP CA can limit amps. Can't if its a stand alone. Sorry, that is incorrect. All CAs can limit Amps. https://www.ebikes.ca/shop/electric-bicycle-parts/cycle-analysts.html The DP models use the controllers internal shunt to do it, the SA models use a supplied ext...
by ferret
Apr 12 2019 10:30am
Forum: E-Bike Technical
Topic: Adjustable controller?
Replies: 6
Views: 222

Re: Adjustable controller?

CA will do that.

Keep in mind that the Amp rating is the maximum that the controller can handle without frying.
If you motor for example pulls 90 Amps max it doesn't matter if the controller can survive 120A, the system will not pull more than 90A.

Avner.
by ferret
Jan 22 2019 5:52am
Forum: E-Bike General Discussion
Topic: Tubeless Rim's What Brands ? Prices ?
Replies: 7
Views: 284

Re: Tubeless Rim's What Brands ? Prices ?

I have been riding tubless off road for a few years now. Both DIY conversions and off the shelf stuff in 26" and 27.5". After switching, flats went from a weekly occurrence to maybe once a year. The only time I burped a little air was after hitting a tree stump with such force that would have probab...
by ferret
Jan 07 2019 10:11am
Forum: E-Bike Non-hub Motor Drives
Topic: DH frames for freeriding
Replies: 52
Views: 2022

Re: DH frames for freeriding

Grant, a 200mm travel DH bike is a good choice, the slack head angle good for riding fast off road. In most cases, freeriders use DH bikes. That said, any (decent quality) full suspension bike will be a major step up compared to a HT. you should take into account that generally the more travel a bik...
by ferret
Aug 31 2018 3:15pm
Forum: E-Bike General Discussion
Topic: Mountain bike frame geometry tending to get longer and lonnnger
Replies: 18
Views: 708

Re: Mountain bike frame geometry tending to get longer and lonnnger

Chalo wrote:
Aug 31 2018 12:47pm
Since MTB riding is usually only fooling around of one kind or another, even what kind of riding that is, is an expression of fashion.
:shock:
:roll:
:lol:
by ferret
Aug 29 2018 3:02am
Forum: E-Bike Technical
Topic: Kv * turns = constant?
Replies: 10
Views: 523

Re: Kv * turns = constant?

Short answer - no. When you double the the KV you also get half the KT and get half of the torque for the same current. However, when doubling the reduction ratio you will get only half the heat.

Long answer - read this :twisted: :
viewtopic.php?f=2&t=64907

Avner.
by ferret
Aug 13 2018 5:58am
Forum: E-Bike Technical
Topic: Possible to increase charger current.
Replies: 5
Views: 298

Re: Possible to increase charger current.

The chargers markings seem to suggest it is rated at 360 Watt. If that is the case, then it won't charge at 8A if the pack voltage is higher than 45V.

Avner.
by ferret
Jul 31 2018 10:09am
Forum: E-Bike Technical
Topic: Lower no-load speed with sine wave controller?
Replies: 11
Views: 434

Re: Lower no-load speed with sine wave controller?

Thanks a lot for the reply! So the Sabvoton probably uses a simpler technique. Are there any controllers that use a more sophisticated technique? (Adaptto?) Which of them use space vector modulation? Instead of replacing the controller, why not just just enable the field weakening and set it to get...
by ferret
Jul 30 2018 5:54pm
Forum: E-Bike Non-hub Motor Drives
Topic: Nylon Motor Mounts
Replies: 5
Views: 295

Re: Nylon Motor Mounts

I guess thick plastic could work, but why not use Aluminium? Also, why mount it in a tubular structure instead of bolting the original mounting points to brackets on the swing arm? Maybe if you posted some picture I could get a batter idea of what you are aiming for and try to give more focused advi...
by ferret
Jul 30 2018 5:37pm
Forum: E-Bike Non-hub Motor Drives
Topic: Castle LINK programming kit - is it necessary/worthwhile with CA V3?
Replies: 11
Views: 484

Re: Castle LINK programming kit - is it necessary/worthwhile with CA V3?

I'm running a Phaserunner with a 3215 (sensored).
Works good, but less powerful than the HV160 I used before.

Dave, the ASI guys are useless, Grin Cycles guys rock.

To get it to work without errors I used the following setting:
Banwidth.PNG
Avner.
by ferret
Jul 30 2018 11:34am
Forum: E-Bike Non-hub Motor Drives
Topic: Nylon Motor Mounts
Replies: 5
Views: 295

Re: Nylon Motor Mounts

Ham,
Nylon isn't very strong and is a poor heat conductor.
Mounting the motor in a tubular closed structure with heat insulating mounts sounds like a recipe for heat soak.
Doesn't make much sense to me...

Avner.
by ferret
Jul 30 2018 4:30am
Forum: E-Bike Technical
Topic: BMX chains
Replies: 5
Views: 268

Re: BMX chains

Only 10 (or more) speed chains will fit 10 speed cassettes and derailleurs. BMX chains are too wide.

Avner.
by ferret
Jul 24 2018 5:06am
Forum: E-Bike Non-hub Motor Drives
Topic: Name/Type of sprocket for this mid motor drive?
Replies: 8
Views: 464

Re: Name/Type of sprocket for this mid motor drive?

Maybe turn the old sprocket into an adaptor for a standard BCD sprocket by drilling chainring bolt holes and cutting off the the toothed rim?

Avner.
by ferret
Jul 07 2018 9:01am
Forum: E-Bike Technical
Topic: Halo wheels
Replies: 2
Views: 208

Re: -- Cuts in Halo wheels, what the heck is this? --

Looks normal. All aluminum rims are made by taking a straight profiled extrusion and bending it into a circle. The "cuts" are the place where the circle is joined. The joint is usually strengthened with an insert and some times welded. In most cases the valve hole is located opposite to the joint of...
by ferret
Jul 04 2018 8:31am
Forum: E-Bike Technical
Topic: Powerful middrive in a carbon frame
Replies: 24
Views: 1609

Re: Powerful middrive in a carbon frame

How would you mount it - 2 piece brackets that go around the frame and tighten or screw through the frame? Any feedback is welcome, I'm currently deciding between an alloy and carbon stumpjumper, and 2-3kg weight saving on an ebike would be quite appreciated, I just don't want to snap it in half. H...
by ferret
Jun 30 2018 6:02am
Forum: E-Bike General Discussion
Topic: Rear hub that can hold a sprocket as well as the Disc Rotor ?
Replies: 6
Views: 821

Re: Rear hub that can hold a sprocket as well as the Disc Rotor ?

Most builds use an adapter beneath the brake disk to bolt the sprocket to instead of using a special hub.

Such as this:
5 holes chainwheel adaptor for BCD 44mm Disc brake mount 18 USD:
http://www.cyclone-tw.com/Parts.html

or this:
20160627_102842_HDR.jpg
20160627_102842_HDR.jpg (304.62 KiB) Viewed 560 times
Avner.
by ferret
Jun 30 2018 5:51am
Forum: E-Bike Technical
Topic: Building a robust rear wheel for a mid-drive
Replies: 2
Views: 253

Re: Building a robust rear wheel for a mid-drive

With the high torque forces applied with some of the more powerful mid-drive kits, building a proper rear wheel to handle the stress seems quite important. ... Reading through Sheldon Brown's excellent site and info, he mentions that some builders opt to use stronger spokes on the drive/derailleur ...
by ferret
Jun 29 2018 11:17am
Forum: E-Bike Non-hub Motor Drives
Topic: crank freewheel dimensions?
Replies: 8
Views: 501

Re: crank freewheel dimensions?

X2flier ,
I think something in here will do the job for you:

http://www.cyclone-tw.com/Parts.html

Get a BB to fit your frame with the matching crank threaded arms.
Avner.
by ferret
Jun 24 2018 8:26am
Forum: E-Bike Technical
Topic: Using bicycle's frame as heatsink for the Phaserunner
Replies: 45
Views: 4068

Re: Using bicycle's frame as heatsink for the Phaserunner

Remember that liquid water takes a HUGE amount of energy to evaporate. This is why sweating is so effective. ... I agree that the best approach would have been replacing the controller to a bigger 12FET one, but you tell me where to find a 12FET controller which is: 1. Programmable (in the sense of...
by ferret
Jun 19 2018 3:05pm
Forum: E-Bike Technical
Topic: Short throw thumb throttle?
Replies: 28
Views: 1370

Re: Short throw thumb throttle?

Using the WUXING 108X (on the left side).
After running it stock for some time, I shortened the lever with a grinder to get less linear throw and more sensitivity.
IMG_20180619_225832_800.jpg
IMG_20180619_225832_800.jpg (88.82 KiB) Viewed 201 times
Happy with it.

Avner.
by ferret
Jun 19 2018 2:51pm
Forum: E-Bike Non-hub Motor Drives
Topic: Dave's 80:1 RC mid drive kit build log
Replies: 1366
Views: 163758

Re: Dave's 80:1 RC mid drive kit build log

Hello everybody! I have some difficulty with the half throttle provided witht the tangent. I'm looking for a thumb accelerator, but I'm not sure to have enough space on my right side because of the shifter, maybe I should to install it on the left side. Do you have any feedback with this type of th...
by ferret
Jun 03 2018 8:00am
Forum: E-Bike General Discussion
Topic: "We don't service DIY Ebikes" said the cycle shop
Replies: 26
Views: 1345

Re: "We don't service DIY Ebikes" said the cycle shop

Bleeding the brakes is within the capabilities of a A good DIYer, I bleed my own 8) .
Maybe you could remove the brakes from the bike and give just the brakes to the bike shop?

Avner.