Recent content by mctubster

Just an aside ... still rocking a TSDZ2 in one cargo bike, Bosch CX in other cargo bike ... there is a very interesting new type of motor that is being released, mechanically looks very interesting https://bikerumor.com/tq-hpr50-ebike-motor-harmonic-pin-ring-transmission/ Cheers

It sounds like you still have a scenario where you have tx,rx reversed. Ie by replacing the VLCD5 plug you have wired it correctly to work with the rest of the wiring and it remains reversed for the other two screens?

Likely the 850c screen is a 2021 version (check the back) which this version of the firmware does not support. You need to use the mrbusa forked firmware.

Just had something pop in my motor. Approx 3000km on a heavy cargo bike I thought a shaft had broken, it was a loud crack noise, but I pulled it apart and both the motor and main gear shafts are fine. Looks like the one way clutch in the blue gear has gone! Haven't read about this one before...

Low battery cutoff setting

Haven’t done this myself, but can’t see any reason why not. Yes the discharge curve is a bit flatter but as long as you enter the right low voltage cutoff and max current. Obviously don’t use the cell count / battery voltage tables in the manual. Out of interest what cells and how many?

There is a newer version of the 850c display that I am only aware of one of the TSDZ2 versions working on https://github.com/emmebrusa/TSDZ2-Smart-EBike-860C/releases/download/v20.1C.3-860C/850C_2021_v20.1C.2-bootloader.bin Of course the motor needs the matching firmware too...

Thank you for performing these tests. It helps explain why quieter motors have multiple nylon step downs. Very quiet motors seem to have carbon belt drives. It is also interesting as the code is refined some of the motor harmonics are reducing over time - anecdotally a lot of motor noise at...

Love it, congrats on your build, looks great

If its a 2021 850c likely won't work until a patch is applied to the existing code

The black wire in the loom going to the display is GND. They moved it at some point. Just splice into that. For reference here is a video I made a while ago, near the end if you look carefully you can see the black wire in the display loom goes off somewhere else on the board...

Here is the post. I don't have a build env so I can't patch sorry https://endless-sphere.com/forums/viewtopic.php?f=30&t=93818&p=1623369&hilit=850c#p1623369

They are recoverable. There was a post about this a few months ago. Someone had a patch for the newer 850c display but I don’t believe it was ever submitted. If you flash the 860 firmware on your 850 screen and you see the boot screen on believe it should work. Let me try to find the post

Nice one. While it was working did you notice any difference in noise profile!

From an earlier post I made I have been obsessing over Q Factor for some time now. I bought some replacement cranks and measured against the bundled TSDZ2 cranks. Here are the results for my bike with bottom bracket width 70mm. Original TSDZ2 crank arms (edited to make clearer) 206mm (offset...