Retrofit of my (now) bluish, purplish bike!

[m@Robertson]

can a torque sensor be added to the BBSHD?

No but you can change the PAS so dramatically you won't want it. the BBSxx will run away from you and engage like a great big mechanical switch.

You will not recognize or possibly even believe the difference when you properly work the motor over to change how it engages, disengages, runs on much lower power (which improves range by a bunch) and even pulls assistance back as cadence increases. The motor will be in the background to your pedal effort. Stock, it runs the show and you are trying and failing to keep up. I have owned a torque-sensed bike and what can be done with a BBSxx makes it superior to torque sensing (yes really). The key to this is moving the motor to the 'background'. You still have lots of power - if you care to use it.

BBSHD Programming For The Pedaling Cyclist

(But Not For The Throttler) There is a follow-on to this article that tinkers with these settings a bit further. In August 2023 I published another update that passed along what I’m doing dif…

talesontwowheels.com

 

[EMGX]

Power wise it sounds like a tongsheng can't compare with bafang, but I don't want a heavier motor with a cadence system. I have converted a couple bikes with cadence based geared hub motors. They work great but still not the more natural feel of torque sensing which is a strong preference of mine.
From the eco ebike site:
"We program ours (ourselves) for 15a on the 36v models, 18a on the 48v and 17a on the 52v models - stronger than you can get anywhere else! We would rate the 36v15a @ 500w, and the 48v18a & 52v17a @ 750w - which is a realistic actual power rating for the TSDZ2. The 750w BBS models are rated with a bit of a deflated value, seeing how they peak over 1300w, while the TSDZ2 typically peaks under 1000w."

But my tsdz2 compare favorably with my Yamaha PW-SE 250w nominal, 70nm mid drive gravel bike. I have noticed that weight, tire width, and pressure make a large and very noticeable difference in assist. 32c Gatorskins at 100 psi vs 40c Schwalbe G-One at 70psi with Tannus Armor and heavy Slime tubes on the Yamaha is a big difference. 750W 48v tsdz2 on a 700c hybrid bike close in weight to the Yamaha mid drive with similar tires are about the same, as far as I can tell. Same tsdz2 on a 26" Dahon Jack with 2.2 Maxxis Holy Rollers at 65psi provides much less assist vs the hybrid.
Maybe too there is an issue with your battery or motor.

 

[mikeschn]

"We program ours (ourselves) for 15a on the 36v models, 18a on the 48v and 17a on the 52v models -

I just received my programming cable for the TSDZ2... I am going to fire up the tool and see what my options are!

 

[mikeschn]

I just received my programming cable for the TSDZ2... I am going to fire up the tool and see what my options are!

Not a lot of excitment here. I can only change the voltage and amperage. The amperage was set to 00, which is the default, whatever that may be. I set it to 15 amps. I'll test that. Maybe later I'll try 17.

But to get into the really fun stuff, I need to get an 860C display so I can look at the open source version.

 

[mikeschn]

That didn't help. After the initial boost, the power dwindles down until it's completely gone. Then I have to shut down and restart the bike... and the cycle repeats.

So I got frustrated... (no I didn't throw the bike in the lake!) Ha!

I did pull the TSDZ2 motor, and popped the Bafang in. I still need to clean up the wiring, but on my test ride, I've got lots of get up and go again!

I'll have to check out that programming link from m@Robertson

BBSHD Programming For The Pedaling Cyclist

(But Not For The Throttler) There is a follow-on to this article that tinkers with these settings a bit further. In August 2023 I published another update that passed along what I’m doing dif…

talesontwowheels.com

 

[PedalUma]

Hey everyone, I'm just jumping in here. On a TSDZ2 there is a secret (don't tell anyone) compartment for hiding extra wires. It is behind the chainring. On that display you can tell it that it has up to 15 wheel magnets. You can tell it that it has 5, but only install 3. I don't install any. And I chop off the speed sensor. Than seal the wound and stuff the nub in the hidden compartment. This makes it fly. Otherwise it is kind of a dud. On this display you can also tell a 29er that it has 10 inch wheels, so it better keep up. The front of the secret compartment housing can be easily drilled and a wire can come out there, giving a cleaner look. Here is what the HB looks like on a recent build a couple of days ago. And then one I made yesterday. See how the battery wire goes forward?

 

[mikeschn]

@PedalUma ,

I've tried everything you suggested... no luck...

I'm going to rethink the TSDZ2, and possibly the Open Source firmware. But then I need the 860C display too. It's possible that I have a defective TSDZ2... so something else to think about.

I have other bikes that I can install the TSDZ2 on... just have to think this through... Nice trick with the hidden compartment!

 

[PedalUma]

It could be defective. Think about it. Lots of stuff is going to have defective components or subcomponents in '22. How do you shut down a factory, multiple times with Covid lockdowns and restart it multiple times weeks later, without dropping the ball sometimes? At the shut down, was the entire sequence of that portion of an assembly line station done? Also there are a range of suppliers and there are counterfeiters and people trying to pass QC failures onto the market. Is that really a Rolex on Ali? I have never had a controller fail, now one just did after one week. The same QC issues will happen with everything from refrigerators to computers. Private message me with what it is doing weird.

 

[PedalUma]

Sorry to post twice in a row. This is the Top Secret Compartment for hiding wires. In the second photo it took an hour to properly position the the hole. How long does it take to dill a hole? That all depends on if you want it in the right place!

 

[mikeschn]

Got the cable ordered for the Bafang programming... Now I just wait...