Search found 238 matches

by hias9
Nov 15 2020 6:46pm
Forum: EBike General Discussion
Topic: Alternative to Domino Throttle
Replies: 3
Views: 314

Re: Alternative to Domino Throttle

Same happened to me. Definitely feels way better than the Chinese stuff, but it is still far away from perfect.
by hias9
Nov 15 2020 6:21pm
Forum: EBike General Discussion
Topic: Alternative to Domino Throttle
Replies: 3
Views: 314

Alternative to Domino Throttle

Are the any other good quality throttles?
The feeling and controllability of the Domino is great. Unfortunately it needs quite some space, gets damaged by crashes easily and the thread is made of plastic. Also I don’t need the integrated switch it has.
by hias9
Sep 29 2020 6:08pm
Forum: EBike General Discussion
Topic: Triangle Battery Bag hitting Chainring/Front Derailleur
Replies: 4
Views: 201

Triangle Battery Bag hitting Chainring/Front Derailleur

I am looking for solutions on the following problem: https://i.ibb.co/WkbxLRy/DSC-3114.jpg There is a large 140 cell triangle battery + charger + controller inside a triangle frame bag. I will secure the battery inside the pack a bit by using velcros, but that alone won't do the job. The battery its...
by hias9
Jul 09 2020 4:43pm
Forum: EBike General Discussion
Topic: Rear Derailleur Compatibilty for 5speed
Replies: 19
Views: 641

Re: Rear Derailleur Compatibilty for 5speed

Domino throttle and thumb throttle for regen are on the right and I dont want to change that, so the shifter has to be on the left. There are non-index grip shifters for the left (at least they say that on the ebay description) but I dont know if cable length would be okay. I will probably try that....
by hias9
Jul 09 2020 9:30am
Forum: EBike General Discussion
Topic: Rear Derailleur Compatibilty for 5speed
Replies: 19
Views: 641

Re: Rear Derailleur Compatibilty for 5speed

Thanks, I think that’s the best option.
Did anybody already try if 3speed (non-index or converted to non-index :D ) twist grip shifters for front derailleurs would work with a 5speed rear derailleur?
by hias9
Jul 09 2020 7:41am
Forum: EBike General Discussion
Topic: Rear Derailleur Compatibilty for 5speed
Replies: 19
Views: 641

Re: Rear Derailleur Compatibilty for 5speed

Sorry, I confused friction shifter with grip shifter. What I have already on one bike is a non-index friction (thumb) shifter. What I would like to try is a twist grip shifter. Do you think a 5speed indexed would work fine with a vintage 5speed Shimano derailleur? Would a non-index 3speed grip shift...
by hias9
Jul 08 2020 3:45pm
Forum: EBike General Discussion
Topic: Rear Derailleur Compatibilty for 5speed
Replies: 19
Views: 641

Re: Rear Derailleur Compatibilty for 5speed

On another bike I use a Shimano 5speed vintage derailleur (I think from the 70s) and a non-index thumb shifter. Probably I will try a friction shifter this time, but I would need one for the left side because on the right I have a Domino throttle and a thumb throttle for variable regen. Can a 3speed...
by hias9
Jul 06 2020 8:22pm
Forum: EBike General Discussion
Topic: Rear Derailleur Compatibilty for 5speed
Replies: 19
Views: 641

Rear Derailleur Compatibilty for 5speed

When using a 5speed freewheel cassette on a big rear hub motor, with which rear derailleurs can it be combined?
Is a 7/8 speed or even 9speed derailleur fine, or does it have to be a 5speed derailleur from the 70s?
by hias9
Jun 23 2020 10:28am
Forum: Bike Mechanical & Structural
Topic: The wheel-building spoke-lacing thread, post your tips
Replies: 245
Views: 51874

Re: The wheel-building spoke-lacing thread, post your tips

When lacing a rear hub motor in a one-cross pattern with all the spokes exiting on the same side, do you put the spokes which are stretched on acceleration on the outside (like it is done in the Grin lacing YouTube video), do you put them on the inside or do you put them diffently on the right side ...
by hias9
Apr 25 2020 5:41pm
Forum: EBike Technical
Topic: Measuring airflow to optimize cooling of hub motor
Replies: 19
Views: 578

Re: Measuring airflow to optimize cooling of hub motor

I mean if somebody made simulations for a rear hub motor ebike using existing programs. Yes, doing that would be very time consuming I think and probably not worth the effort. Better just trial and error and test it practically. Is anybody using sheets to direct air to the hub motor and did you noti...
by hias9
Apr 25 2020 7:18am
Forum: EBike Technical
Topic: Measuring airflow to optimize cooling of hub motor
Replies: 19
Views: 578

Re: Measuring airflow to optimize cooling of hub motor

Well, I guess you are right. It's much easier to try to make 2 comparable runs while only measuring motor temperature.

Are there any Fluid Dynamics simulations available for larger hub motor bikes?
by hias9
Apr 22 2020 8:21pm
Forum: EBike Technical
Topic: Measuring airflow to optimize cooling of hub motor
Replies: 19
Views: 578

Re: Measuring airflow to optimize cooling of hub motor

Wow, there are really a lot of different ideas/approaches here. Thanks! The idea is optimizing cooling at higher speeds (about 60mph). The motor is a 3kw hub motor with Statorade and Hubsinks. Of course it has a temperature sensor and temperatures are monitored. Just measuring motor temperature woul...
by hias9
Apr 17 2020 10:14am
Forum: EBike Technical
Topic: Measuring airflow to optimize cooling of hub motor
Replies: 19
Views: 578

Re: Measuring airflow to optimize cooling of hub motor

Not really. I would need some kind of sensor I could mount on the hub motor or hubsinks and it should log data. I did not find anything that would do the job.
by hias9
Apr 16 2020 10:52pm
Forum: EBike Technical
Topic: Measuring airflow to optimize cooling of hub motor
Replies: 19
Views: 578

Measuring airflow to optimize cooling of hub motor

I am looking for a way to measure air velocity on a certain spot (like somewhere on the hub motor/hubsinks) to optimize cooling.

My plan is to make sheets that direct air to the hub motor to improve cooling at higher speeds.
by hias9
Mar 16 2020 9:21am
Forum: EBike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 239
Views: 44997

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

For my G310 it was basically plug and play (and set parameters) to match with a KT controller. White cable is the speed sensor cable.
by hias9
Mar 15 2020 11:32pm
Forum: EBike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 239
Views: 44997

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

P2 should be 6 because it has 6 pulses per turn. It worked fine for me.
by hias9
Mar 14 2020 3:53pm
Forum: EBike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 239
Views: 44997

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

I had a squeaking noise on my G310 which was caused by the black rubber ring on the cable side. I put some silicone spray on it and the squeaking noise was gone, but the rubber ring is not staying in place because it is too elastic. The rubber ring makes one turn about every 30 seconds when the moto...
by hias9
Mar 13 2020 6:59pm
Forum: EBike General Discussion
Topic: Where to get those Bearing Standoff Rings for Hub Motors
Replies: 0
Views: 337

Where to get those Bearing Standoff Rings for Hub Motors

I think there are one or two of those thin bearing standoff rings missing on my Bafang G310.

Image

Does anybody know where to get those rings which are used in hub motors?
by hias9
Mar 13 2020 6:45pm
Forum: EBike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 239
Views: 44997

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

I did not change it. I think default value was zero and worked fine.
by hias9
Mar 13 2020 5:01pm
Forum: EBike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 239
Views: 44997

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

Yes, it is working fine. Do you mean the parameter for the number of magnets (P1)? It should be 16*11.1=178
by hias9
Mar 13 2020 3:53pm
Forum: EBike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 239
Views: 44997

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

My G310 only had one bearing standoff ring on the left (cable) side and none on the right side.
The G310 in the Grin video has 2 bearing standoff rings on the right.

How was it on your G310s?
by hias9
Feb 26 2020 12:41am
Forum: EBike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 239
Views: 44997

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

After my G310 was running a bit without load on the bench (not above 42 kph), it started squeaking.
Do you think it's the bearings which are squeaking?

Videos:
https://streamable.com/rzq58
https://streamable.com/nbtb6
by hias9
Jan 09 2020 3:11pm
Forum: EBike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 239
Views: 44997

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

Ok, the metal part with the flats was a second nut. There was minimal space to grab the flats, but after that you can easily separate the 2 parts. Now I am struggling to get the case back on. I just cannot get the bearing on the cable side back to where it should sit. Even not by pressing on a concr...
by hias9
Jan 09 2020 12:29pm
Forum: EBike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 239
Views: 44997

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

Yes, there is a circlip retaining ring, but it is on the left side (motor/gears side).

The flywheel side looks like this after I have removed the nut:
Image
The metal part below the nut has flats, but it is not possible to grab them.
by hias9
Jan 09 2020 2:04am
Forum: EBike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 239
Views: 44997

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

To look for a spot for a temperature sensor, I have disassembled the case of my G310 like in Justin's video which was very easy.
However I cannot separate the motor+gear from the freewheel by hand (in the video it works with minimal force). Is this normal?