Search found 8 matches

by fja2
Feb 13 2021 7:30am
Forum: EBike Non-hub Motor Drives
Topic: DIY Speed sensor | Bafang BBSHD sensor reverse engineering
Replies: 2
Views: 601

Re: Bafang BBSHD "DIY" Speed sensor experimentation

Wow, this post is now over a year old. I'm back to change this thread into something that could help people. I got a new BBSHD speed sensor and the plastic snapped again! I decided to take it apart and see what makes it tick and if I can design something that isn't mounted with a plastic stick. The ...
by fja2
Jun 09 2020 7:53am
Forum: Items for Sale - New
Topic: ASI BAC Controllers Worldwide Vendor
Replies: 137
Views: 14793

Re: ASI BAC Controllers Europe Vendor

I really like your approach to the ASI BAC controllers. I'm all for being able to modify parameters at will from the app. I sent you a PM. 🙂
by fja2
May 03 2020 1:25am
Forum: EBike Technical
Topic: Bafang BBSHD How I repaired my controller and how you might do it!
Replies: 7
Views: 643

Re: Bafang BBSHD How I repaired my controller and how you might do it!

I guess my battery can't supply more than 30-35A. If the battery was the actual limiting factor, it would be shutting off due to overcurrent when you reach that, either as a direct overcurrent protection, or as low-voltage-cutoff from excessive sag during those current levels. If that's not happeni...
by fja2
May 02 2020 2:49pm
Forum: EBike Technical
Topic: Bafang BBSHD How I repaired my controller and how you might do it!
Replies: 7
Views: 643

Re: Bafang BBSHD How I repaired my controller and how you might do it!

You might want to try a regular wattmeter between the battery and controller. Or a clamp-on ammeter on the battery output wires. Then you will be able to see if the current is really still increasing, and the display/controller simply can't provide a reading above the limit you're seeing. Sadly I h...
by fja2
Apr 25 2020 12:26am
Forum: EBike Technical
Topic: Bafang BBSHD How I repaired my controller and how you might do it!
Replies: 7
Views: 643

Re: Bafang BBSHD How I repaired my controller and how you might do it!

How are you measuring the current? If you are looking at the display, it will still be 30A even after the shunt mod, but the actual current will be higher. The current measurement on the display is based on the shunt. I measure current on my Eggrider, Im aware that there's a certain multiplier I ha...
by fja2
Apr 23 2020 5:23pm
Forum: EBike General Discussion
Topic: How To, 50A BBSHD Controller Mod
Replies: 260
Views: 55745

Re: How To, 50A BBSHD Controller Mod

I did this mod and kindof broke my controller, you can read about how I fixed it here: https://endless-sphere.com/forums/viewtopic.php?f=2&t=105837&p=1548984#p1548984 Anyway! I now got two 2mOhm shunts, crazy small I know! But my motor still won't go over what would be about 30 amps. Anyone ...
by fja2
Apr 23 2020 4:48pm
Forum: EBike Technical
Topic: Bafang BBSHD How I repaired my controller and how you might do it!
Replies: 7
Views: 643

Bafang BBSHD How I repaired my controller and how you might do it!

Hey guys, this is some kind of advanced troubleshooting guide for the BBSHD controller. :bolt: There's a capacitor that's connected in parallel to the + and - terminals. After the controller has been disconnected from the battery do the following: 1. Turn on your display. 2. Measure the voltage betw...
by fja2
Nov 07 2019 3:29pm
Forum: EBike Non-hub Motor Drives
Topic: DIY Speed sensor | Bafang BBSHD sensor reverse engineering
Replies: 2
Views: 601

DIY Speed sensor | Bafang BBSHD sensor reverse engineering

This is a complete repurposing of this thread. Short story, I've broken 8FUN speed sensors in the past and finding information on how this speed sensor works was impossible. This thread aims to provide schematics, simple measurements, sample 3D designs and a place where people can talk about 8FUN an...