Search found 10 matches

by Thomsontouring
May 06 2019 2:42pm
Forum: General Discussion
Topic: What type of plastic XT60 and EC5?
Replies: 9
Views: 625

Re: What type of plastic XT60 and EC5?

Just tested an XT90 I had lying around. It's definitely nylon. (My day job is Plastics Engineering) Melting point is around 475°F. ABS melts around 360°F. But you can still melt nylon with a soldering iron, which normally runs around 700.
by Thomsontouring
May 03 2019 1:04pm
Forum: E-Bike General Discussion
Topic: first electric bike build, lots of questions
Replies: 19
Views: 999

Re: first electric bike build, lots of questions

I wouldn't categorically say that a mid-drive install is more difficult for a first build (provided you have the right tools to remove the crank). My first Bafang BBS02 install took 3 hours and my second one took 2 hours, as did my tenth one. All the electrics are plug-and-play so there's no crimpin...
by Thomsontouring
May 03 2019 10:28am
Forum: E-Bike Non-hub Motor Drives
Topic: Best internal gear hub?
Replies: 132
Views: 35789

Re: Best internal gear hub?

I've built several bikes with Nexus 3-speed and 8-speed IGHs using BBS02 (1450w) and BBSHD (1750w) mid-motors. I haven't had a hub fail yet in thousands of miles. Don't shift under load and they work fine. You can use single-speed chain and 1/8" sprockets which eliminates most drivetrain wear issues...
by Thomsontouring
May 03 2019 8:30am
Forum: E-Bike General Discussion
Topic: First E-Bike - Doing DIY BBSHD - Critique my plan
Replies: 162
Views: 4943

Re: First E-Bike - Doing DIY BBSHD - Critique my plan

The other thing common to scooters and mopeds is small diameter wheels. Large wheels on bicycles not only smooth out the ride by decreasing the contact angle of road imperfections, but they also contribute to stability. One of my motorcycles was a cruiser-style with 19" front rim and I could steer w...
by Thomsontouring
May 02 2019 3:02pm
Forum: E-Bike General Discussion
Topic: First E-Bike - Doing DIY BBSHD - Critique my plan
Replies: 162
Views: 4943

Re: First E-Bike - Doing DIY BBSHD - Critique my plan

Note that the OP was only talking about going 24mph. But even with 1000 watts he's going to be going 10mph up hills so he'll have to make it up on the downhills. Non-powered road bikes are routinely doing 40 or even 50 on hills when the road is good. I'm talking about roads like this which I was on ...
by Thomsontouring
May 02 2019 12:54pm
Forum: E-Bike General Discussion
Topic: First E-Bike - Doing DIY BBSHD - Critique my plan
Replies: 162
Views: 4943

Re: First E-Bike - Doing DIY BBSHD - Critique my plan

Some real-world experience with a very similar set-up to OP's proposal-- I'm very happy with a BBSHD on a hardtail name-brand alloy frame. I carry 1500 watt-hours and take weekly 50-70 mile rides on hilly rural roads with lots of potholes. I average about 18mph and peak at 45mph on downhills. The fr...
by Thomsontouring
Dec 15 2018 10:46am
Forum: E-Bike Technical
Topic: EM3EV Bluetooth BMS App
Replies: 6
Views: 1973

Re: EM3EV Bluetooth BMS App

I took my em3ev BMS out after it failed. There is a sticker on it that says: Power core BMS Possibly this is the manufacturer's website -- http://en.d-powercore.com/eproduct/list-47.html This information is also printed on the BMS: DXB30-1440BU-1002 50.4V/17.7AH BARCODE with this number below 182840...
by Thomsontouring
Nov 09 2018 3:02pm
Forum: E-Bike General Discussion
Topic: New em3ev battery not working.
Replies: 7
Views: 654

Re: New em3ev battery not working.

I recently had the BMS fail in a brand new 52v em3ev battery. They sent a new one and it also failed within a week. The second replacement appears to work. So maybe they got a batch of faulty BMS boards? They will definitely replace it under warranty, and it's much cheaper and faster to air freight ...
by Thomsontouring
Sep 21 2018 8:15am
Forum: E-Bike Non-hub Motor Drives
Topic: Battery BMS failed for second time
Replies: 0
Views: 401

Battery BMS failed for second time

I'm posting this to find out if anybody has had a similar experience, or any advice. I'm not in any way trying to disparage the reputable vendor (em3ev) who provided my kit and I'm sure will stand by their product and get my bike running again. This is the fairly generic kit I bought - my fourth bui...
by Thomsontouring
Jun 19 2018 3:43pm
Forum: E-Bike Non-hub Motor Drives
Topic: [Solved] BBS02, C965 without wattmeter ?! PAS max 3 ?
Replies: 24
Views: 3616

Re: [Solved] BBS02, C965 without wattmeter ?! PAS max 3 ?

I recently got a C965 from Em3ev. It also doesn't show the wattmeter, but if I push the ON switch 3 times while riding it will show the instantaneous watts at the bottom of the screen for about 3 seconds.