Search found 40 matches

by espresso
Aug 26 2019 2:11pm
Forum: Vendor Relations Corner
Topic: AVOID EUNORAU on Aliexpress
Replies: 38
Views: 2616

Re: AVOID EUNORAU on Aliexpress

Well I had a pretty horrible experience with the company, so I wouldn't be buying anything in a hurry from them.
by espresso
Aug 13 2019 9:26am
Forum: E-Bike General Discussion
Topic: Help me develop the perfect throttle
Replies: 73
Views: 2247

Re: Help me develop the perfect throttle

A switch in the initial twist region to switch off the stupid Bafang PAS. For those who don't know, the new Bafang mid drives get confused if you pedal with PAS and use the throttle at the same time. A simple normally closed switch could be set up to disable the PAS as soon as a git of throttle is a...
by espresso
Mar 01 2019 5:07am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 132
Views: 12461

Re: Full suspension mountain bike Friction Drive

A build like this is definitely in my future! Kepler, I know that you said earlier that you didn't like the idea of a drive off the sidewalls of the tyre, but what you have made is basically a flat belt drive. In industrial applications, V pulleys and belts are dominant. I would suggest that a V dri...
by espresso
Feb 13 2019 7:57am
Forum: Vendor Relations Corner
Topic: AVOID EUNORAU on Aliexpress
Replies: 38
Views: 2616

Re: AVOID EUNORAU on Aliexpress

I can agree about this vendor. My controller on a BBSHD lasted a month, then just stopped working. I contacted Eunorau who agreed to send me a new controller if I returned the broken one AT MY EXPENSE! OK bad enough but at least a replacement. However, when I took off the controller, I noticed that ...
by espresso
Feb 08 2019 6:54am
Forum: Vendor Relations Corner
Topic: em3ev support?
Replies: 16
Views: 2160

Re: em3ev support?

I have always found their support incredible. Must be a New Year issue.
by espresso
Jan 04 2019 9:03am
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD advice before placing order
Replies: 7
Views: 779

Re: BBSHD advice before placing order

If you have a bit of feel for your drive system, a gear sensor is unnecessary. Just back off on the throttle, change gear and then throttle on.
If using the PAS, just stop pedaling for a second, change gear and then slowly re-start pedaling.
by espresso
Oct 21 2018 7:55am
Forum: E-Bike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 109
Views: 17022

Re: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

I see that the Domino throttle has a micro switch built in. Couldn't this be used to switch off the PAS as soon as the throttle is activated?
by espresso
Jul 18 2018 3:57am
Forum: E-Bike Build Threads / Photos & Video
Topic: Specialized Mid drive
Replies: 6
Views: 834

Re: Specialized Mid drive

Could you post a picture of the bike without the cover on?
I want to modify this exact same bike!
by espresso
Jul 17 2018 8:26am
Forum: E-Bike Build Threads / Photos & Video
Topic: Specialized Mid drive
Replies: 6
Views: 834

Re: Specialized Mid drive

Fantastic looking battery housing!
Did you make a mould?
by espresso
May 24 2018 9:42am
Forum: Battery Technology
Topic: 14S battery @57.4 V or 15S @ 60V ?
Replies: 27
Views: 1885

Re: 14S battery @57.4 V or 15S @ 60V ?

Are you keeping the cell count the same? I don't understand your question? Whatever I do, I will use 3 parallel strings, so 14S 3P at 4.05 V per cell or 15S 3P at 4.0 V per cell Which will hold more energy? I may actually have to hold the 15S at 3.95V to ensure that I am below the magic 60V to not ...
by espresso
May 24 2018 7:04am
Forum: Battery Technology
Topic: 14S battery @57.4 V or 15S @ 60V ?
Replies: 27
Views: 1885

Re: 14S battery @57.4 V or 15S @ 60V ?

Well the question still remains...
Will 14S charged at 4.05V per cell
hold or or less power than
15S charged at 4V per cell ?
by espresso
May 24 2018 2:51am
Forum: Battery Technology
Topic: 14S battery @57.4 V or 15S @ 60V ?
Replies: 27
Views: 1885

Re: 14S battery @57.4 V or 15S @ 60V ?

Also, 15S is very rare, if you decide you truly want that, then you will likely need to build your own pack. Not impossible, but simply a major consideration in the final decision. When a 15S pack is fully charged to 4.2V per cell, it is 58.8V (very close to 60V) but...after the first half minute o...
by espresso
May 23 2018 8:54am
Forum: Battery Technology
Topic: 14S battery @57.4 V or 15S @ 60V ?
Replies: 27
Views: 1885

Re: 14S battery @57.4 V or 15S @ 60V ?

The balancing shunts work independently of the over charge detection. You could have the shunts set for 4.1v and still have the over charge detection set for 4.2v or a little higher (to account for reverse sag). If you charge to 4.2v, the cells will take quite a while to drain back down to 4.1v. So...
by espresso
May 21 2018 4:36am
Forum: Battery Technology
Topic: 14S battery @57.4 V or 15S @ 60V ?
Replies: 27
Views: 1885

Re: 14S battery @57.4 V or 15S @ 60V ?

If you don't want your pack getting out of balance you're gonna want to go with less cells and higher voltage. Since the balancing kicks in at 4.2V. Also, if you don't like to keep your cells at 4.2V there is Bestech BMS. They can configure it to start balancing at 4.2V and balance down all the way...
by espresso
May 20 2018 2:46pm
Forum: Battery Technology
Topic: 14S battery @57.4 V or 15S @ 60V ?
Replies: 27
Views: 1885

14S battery @57.4 V or 15S @ 60V ?

I want to build a 18650 battery for my downhill bike with a Bafang BBSHD motor, using Samsung 30Q batteries. I don't want to fiddle with the controller capacitors, so I need to stick to just under 60 volts. Will I achieve anything by running a 15S at just below 60V fully charged (cell voltages 4.0 V...
by espresso
May 19 2018 2:10am
Forum: Battery Technology
Topic: 14S battery @57.4 V or 15S @ 60V ?
Replies: 27
Views: 1885

Re: 14s battery @57.4V or 15s battery @ 60V

OK so 3P it is!
Now i just need to decide about 14 or 15S?
by espresso
May 18 2018 3:18pm
Forum: Battery Technology
Topic: 14S battery @57.4 V or 15S @ 60V ?
Replies: 27
Views: 1885

Re: 14s battery @57.4V or 15s battery @ 60V

I see now that Luna offer a Mighty Mini battery with the 30Q rated at 6 Ahr, so 14S2P. They say that one can draw 30 A. https://lunacycle.com/batteries/packs/52v/52v-mighty-mini-cube-samsung-ebike-battery-pack-30q-6ah-3-pounds/ Regarding the 15S, I suppose I could top up to 4.2 v sometimes to balanc...
by espresso
May 18 2018 1:41pm
Forum: Battery Technology
Topic: 14S battery @57.4 V or 15S @ 60V ?
Replies: 27
Views: 1885

14s battery @57.4V or 15s battery @ 60V

I want to build a 18650 battery for my downhill bike with a Bafang BBSHD motor, using Samsung 30Q batteries. I don't want to fiddle with the controller capacitors, so I need to stick to just under 60 volts. I pedal the bike a lot and only use the motor for short bursts with the throttle (30 amps for...
by espresso
May 08 2018 9:34am
Forum: E-Bike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 109
Views: 17022

Re: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

Thanks to all concerned for the fix!
by espresso
Apr 18 2018 11:33pm
Forum: E-Bike Non-hub Motor Drives
Topic: Throttle Behavior
Replies: 129
Views: 10214

Re: Throttle Behavior

The process would be to increase the setting a little at a time until the PAS inhibits without touching the throttle, then back off a little. If you used a pot for initial adjustment, you could disconnect and measure the resistance of it, then use a fixed resistor. Sorry to digress, but the pot is ...
by espresso
Apr 16 2018 4:13am
Forum: E-Bike Non-hub Motor Drives
Topic: Throttle Behavior
Replies: 129
Views: 10214

Re: Throttle Behavior

I just got a new controller and it didnt fix the problem. It seems there is little way to know what to expect out of Bafangs firmware. Hence what I’m proposing is figuring out how to get around the PAS component of the firmware. Are we even sure that the problem is coming from the Controller? Could...
by espresso
Apr 15 2018 1:53am
Forum: E-Bike Non-hub Motor Drives
Topic: Throttle Behavior
Replies: 129
Views: 10214

Re: Throttle Behavior

I have Bluetooth pressure sensors on my car tyres. Continuously send pressure and temperature to a monitor. Perhaps you can use this?
by espresso
Apr 14 2018 7:00am
Forum: E-Bike Non-hub Motor Drives
Topic: Throttle Behavior
Replies: 129
Views: 10214

Re: Throttle Behavior

What might work is to set up a throttle to change the PAS level setting. This would be the same as hitting the +/- buttons but easier to do while riding. You could then program it for 9 levels and get the levels dialed in so it gets progressively stronger and returns to the starting level when you ...
by espresso
Apr 13 2018 6:22am
Forum: E-Bike Non-hub Motor Drives
Topic: Throttle Behavior
Replies: 129
Views: 10214

Re: Throttle Behavior

I have been thinking about the problem and have done a few experiments: If I start off pedaling, and then add a bit of throttle, nothing happens until I get the throttle to a point where the throttle input is higher than what the PAS level is. Then the throttle kicks in , but it seems undecided as t...
by espresso
Apr 08 2018 1:57pm
Forum: E-Bike Technical
Topic: New em3ev batterý pack
Replies: 71
Views: 8820

Re: New em3ev batterý pack

Electrick wrote:
Mar 22 2018 11:05pm
Espresso, my Android version is 7.0
Works fine...
Hope you have been able to resolve the issue. ☺
I am also using Android 7 on a Samsung Galaxy S7?
No luck though.