New "Lingbei MM28.250 torque sensor mid drive"

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Metaller   10 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by Metaller » Jun 14 2019 10:30am

I have shot short video in which has shown work of trottle (ok), rotation of pedals without effort (the engine twists as much as possible) and normal rotation of pedals with effort (the engine does not turn on, sometimes gives breakthroughs if to weaken effort on pedals) https://yadi.sk/i/MNKzJqOrnvXGjQ
The sensor of torque works on the contrary - turns on the engine as much as possible when it is not necessary, and completely disconnects it when it is the most necessary. How to force it to work normally?

maitilupas   100 W

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by maitilupas » Jun 14 2019 4:57pm

RESOLUTIONS PLEASE

Aeron   10 W

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by Aeron » Jun 18 2019 9:26am

I'm looking for a reliable BB-mountable, torque sensing, 52V compatible motor, and this motor seems to tick those boxes (I was considering the TSDZ2 but the reliability seems not optimal to me).

Is there any evolution regarding the whole flashing/programming side of things ?
I mean, is there any way to flash the motor (hardware and software available ?) to adjust assist level, PAS/torque sensing ratio ?
dodjob wrote:
Apr 23 2019 2:19am
I use the lingbei a lot.
They are "flashable" not "programmable". Which means you can get different factory firmware to be flashed.
Can you tell more about it ? How/what do you flash, where do you find those factory firmwares ?

Eyebicycle mentioned compatibility tests with the Eggrider/SW102, any results ?
Last edited by Aeron on Jun 25 2019 3:56am, edited 1 time in total.

matte2k   10 mW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by matte2k » Jun 22 2019 5:20pm

How is the noise from this motor?
Is it quiet like bbs01 or noisy like tsdz2?

And how is it overall compared to tsdz2 and bbs01 out of the box none tweaked?
I like the torque on tsdz2. But not the noise :(

maitilupas   100 W

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by maitilupas » Jun 27 2019 10:26am

matte2k wrote:
Jun 22 2019 5:20pm
How is the noise from this motor?
Is it quiet like bbs01 or noisy like tsdz2?

And how is it overall compared to tsdz2 and bbs01 out of the box none tweaked?
I like the torque on tsdz2. But not the noise :(
no noise at all , its super silent and has a bunch of torque.
the way is programing sucks big balls, someone please get into the adventure to change this!

matte2k   10 mW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by matte2k » Jun 27 2019 2:17pm

Soundless sounds nice 😊
In what way does the torque sucks?
Im happy with the tsdz2 standard out of the box config. Is it somewhat similiar to that?

maitilupas   100 W

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by maitilupas » Jun 27 2019 3:58pm

matte2k wrote:
Jun 27 2019 2:17pm
Soundless sounds nice 😊
In what way does the torque sucks?
Im happy with the tsdz2 standard out of the box config. Is it somewhat similiar to that?
torque does not suck , it has allot !

Aeron   10 W

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by Aeron » Jun 28 2019 7:47am

maitilupas wrote:
Jun 27 2019 3:58pm
torque does not suck , it has allot !
I think what matte2k meant was "torque sensing" was not up to the TSDZ2 strandard ?

JustPedal   1 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by JustPedal » Jul 05 2019 7:05pm

Hi, Has anyone found an chainring adapter to fit MM28.250? Preferably a 110BCD The TSDZ looks similar BCD but may interfere.
Thanks

rick.schoenmaker@gmail.com   100 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by rick.schoenmaker@gmail.com » Jul 15 2019 10:17am

JustPedal wrote:
Jul 05 2019 7:05pm
Hi, Has anyone found an chainring adapter to fit MM28.250? Preferably a 110BCD The TSDZ looks similar BCD but may interfere.
Thanks
I searched for a long-time and created my own adapter from the chainring provided in the kit to match a 39T 130 BCD Shimano chianwheel. Eventually 1/2 hour work afterall, I spent more time searching for that piece...

rick.schoenmaker@gmail.com   100 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by rick.schoenmaker@gmail.com » Jul 15 2019 10:22am

Since a couple of days I got a Error 4 Hall Sensor issue on my Lingbei mm28.350w with C800 display. As I use the motor for a cargobike, to particular heavy duty biking has been done. Do others have issues yet with the hall sensor? Does it occur on particular circumstances?

Is there a way to reset the controller/computer? I'm a bit affraid to pull the thing off and open it to check the wiring/soldering (and don't want to)

JustPedal   1 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by JustPedal » Jul 17 2019 4:09am

rick.schoenmaker@gmail.com wrote:
Jul 15 2019 10:17am
JustPedal wrote:
Jul 05 2019 7:05pm
Hi, Has anyone found an chainring adapter to fit MM28.250? Preferably a 110BCD The TSDZ looks similar BCD but may interfere.
Thanks
I searched for a long-time and created my own adapter from the chainring provided in the kit to match a 39T 130 BCD Shimano chianwheel. Eventually 1/2 hour work afterall, I spent more time searching for that piece...
Thanks. I reached the same conclusion. I have ordered a 42 from Aliexpress and have the original 46 so will modify one of them.

Aeron   10 W

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by Aeron » Jul 23 2019 12:21pm

Did anyone test this motor with a SW102 display (for Bafang BBS line) ?

rick.schoenmaker@gmail.com   100 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by rick.schoenmaker@gmail.com » Aug 05 2019 6:06am

rick.schoenmaker@gmail.com wrote:
Jul 15 2019 10:22am
Since a couple of days I got a Error 4 Hall Sensor issue on my Lingbei mm28.350w with C800 display. As I use the motor for a cargobike, to particular heavy duty biking has been done. Do others have issues yet with the hall sensor? Does it occur on particular circumstances?

Is there a way to reset the controller/computer? I'm a bit affraid to pull the thing off and open it to check the wiring/soldering (and don't want to)
I've been in contact with OKFeet (supplier) and they send me an new Hall Sensor component to bolt on (no soldering). Very helpfull with video instruction for assembly. I'm wondering if more people have trouble with the Hall Sensor or other sensors. Maybe my issues are due to the Dutch weather.

distantvoices75   1 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by distantvoices75 » Aug 18 2019 11:19am

Hello,

After having read throu' this thread I've dared to order one of these lingbei mm28 kits. The montage on my trekking bike been easy and forward.

Setup: Siga Oxford 28 " @Rohloff Speedhub with 16t sprocket. Mid Motor: Lingbei MM28 36V 500W (v1 or so) with 42t Chain wheel.

Gotta say, this motor is silent and not at all wasteful with power, especially in the eco-modes (1,2). I haven't used the others yet. One feels it working when pedaling. The harder one hits the pedals, the more power one gets. This behaviour is quite prevalent in mode 1, while mode 2 also offers a noticeable boost after a few seconds of working the pedals. One gets the distinct impression of additional power when pedaling harder (vibrations from that big motor spinning up are telling!) whilst riding uphill. I've tested it this way on a few steep roads, and boy, does this thing give a kick!

I have not perceived behaviour like the one described and shown by Metaller. Maybe I've got a different software version? My kit rather behaves like a better programmed tsdz2 while being a whole lot more dependable than these. I've broken the axle as well as the torque sensor of tsdz2 - I like to stand up a lot when riding and the torque sensor of tsdz2 can not deal with that, being the flimsy construction it is. I've ridden about 6000 km with tsdz2 ere it broke yet another time and I lost patience with it.

The Lingbei motor not only gives an impression of sturdiness, it is sturdy. The only drawback are the inbus screws for mounting the chain wheel. These are really an ever so quaint slap in the face in context of the overall great quality of the kit. I've managed to mangle one of these fricken inbus heads - geez! Torx heads would be way better for this! biggest issue in my opinion is the limited variety of chain wheels. There is only 42t available, and, to be honest, this size is too big for my way to ride - I like to spin up the rpms instead of slow pedaling.

And no, I am no affiliate of Lingbei Motors. I just like what I've got with that mid motor.

stay safe and happy riding!

ps: @Metaller - Does the motor behave like that when riding really hard uphill? I mean, if you have the bike on a stand and the rear wheel is spinning freely or with hardly a resistance, wouldn't it be just that the torque sensor doesn't register any torque being applied and thus the motor doesn't kick in as expected? Just a question concerning the testing methodology.

rick.schoenmaker@gmail.com   100 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by rick.schoenmaker@gmail.com » Aug 30 2019 3:28pm

rick.schoenmaker@gmail.com wrote:
Aug 05 2019 6:06am
rick.schoenmaker@gmail.com wrote:
Jul 15 2019 10:22am
Since a couple of days I got a Error 4 Hall Sensor issue on my Lingbei mm28.350w with C800 display. As I use the motor for a cargobike, to particular heavy duty biking has been done. Do others have issues yet with the hall sensor? Does it occur on particular circumstances?

Is there a way to reset the controller/computer? I'm a bit affraid to pull the thing off and open it to check the wiring/soldering (and don't want to)
I've been in contact with OKFeet (supplier) and they send me an new Hall Sensor component to bolt on (no soldering). Very helpfull with video instruction for assembly. I'm wondering if more people have trouble with the Hall Sensor or other sensors. Maybe my issues are due to the Dutch weather.
After receiving the Hall-sensor, I opened the motor and delivered a surpise I was afraid of....

At least 50ml of rust water came out. The motor was covered in rust and also elements of the controller. So not only a defect on the hall sensor... After putting it back together I now also get a “Current Error”... The thing is dead I presume

Sadly OKfeet said this is not part of warranty/after sales care. It surely is a manufacturer error on the seals where moisture was able to get in via the ingoing/outgoing wires.

Don’t know what to do now, giving it another chance or seeking an alternative...

Aquakitty   100 W

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by Aquakitty » Aug 30 2019 10:09pm

rick.schoenmaker@gmail.com wrote:
Aug 30 2019 3:28pm
rick.schoenmaker@gmail.com wrote:
Aug 05 2019 6:06am
rick.schoenmaker@gmail.com wrote:
Jul 15 2019 10:22am
Since a couple of days I got a Error 4 Hall Sensor issue on my Lingbei mm28.350w with C800 display. As I use the motor for a cargobike, to particular heavy duty biking has been done. Do others have issues yet with the hall sensor? Does it occur on particular circumstances?

Is there a way to reset the controller/computer? I'm a bit affraid to pull the thing off and open it to check the wiring/soldering (and don't want to)
I've been in contact with OKFeet (supplier) and they send me an new Hall Sensor component to bolt on (no soldering). Very helpfull with video instruction for assembly. I'm wondering if more people have trouble with the Hall Sensor or other sensors. Maybe my issues are due to the Dutch weather.
After receiving the Hall-sensor, I opened the motor and delivered a surpise I was afraid of....

At least 50ml of rust water came out. The motor was covered in rust and also elements of the controller. So not only a defect on the hall sensor... After putting it back together I now also get a “Current Error”... The thing is dead I presume

Sadly OKfeet said this is not part of warranty/after sales care. It surely is a manufacturer error on the seals where moisture was able to get in via the ingoing/outgoing wires.

Don’t know what to do now, giving it another chance or seeking an alternative...
You should never assume any of these Chinese mid-drives are waterproof. You have to waterproof them
yourself.
Rans Enduro Sport w/Sturmey-Archer XFRD8, TSDZ2 open source mod 48v
GT Verb Comp f/s TSDZ2 open source 48v
Diadora Ampio bargain f/s TSDZ2 48v
2020 Diamant 247 belt drive 1000w 9C 48v
Hardtail made from random bits I had laying around, ginormous old Marzocchi fork, BBS02

rick.schoenmaker@gmail.com   100 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by rick.schoenmaker@gmail.com » Sep 02 2019 1:58am

Aquakitty wrote:
Aug 30 2019 10:09pm
rick.schoenmaker@gmail.com wrote:
Aug 30 2019 3:28pm
rick.schoenmaker@gmail.com wrote:
Aug 05 2019 6:06am
rick.schoenmaker@gmail.com wrote:
Jul 15 2019 10:22am
Since a couple of days I got a Error 4 Hall Sensor issue on my Lingbei mm28.350w with C800 display. As I use the motor for a cargobike, to particular heavy duty biking has been done. Do others have issues yet with the hall sensor? Does it occur on particular circumstances?

Is there a way to reset the controller/computer? I'm a bit affraid to pull the thing off and open it to check the wiring/soldering (and don't want to)
I've been in contact with OKFeet (supplier) and they send me an new Hall Sensor component to bolt on (no soldering). Very helpfull with video instruction for assembly. I'm wondering if more people have trouble with the Hall Sensor or other sensors. Maybe my issues are due to the Dutch weather.
After receiving the Hall-sensor, I opened the motor and delivered a surpise I was afraid of....

At least 50ml of rust water came out. The motor was covered in rust and also elements of the controller. So not only a defect on the hall sensor... After putting it back together I now also get a “Current Error”... The thing is dead I presume

Sadly OKfeet said this is not part of warranty/after sales care. It surely is a manufacturer error on the seals where moisture was able to get in via the ingoing/outgoing wires.


Don’t know what to do now, giving it another chance or seeking an alternative...
You should never assume any of these Chinese mid-drives are waterproof. You have to waterproof them
yourself.
Yes, it was maybe a bit naive by me. I hope they can provide a single motor. I was quite happy about the performance...

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Metaller   10 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by Metaller » Sep 08 2019 2:03am

distantvoices75 wrote:
Aug 18 2019 11:19am
...I have not perceived behaviour like the one described and shown by Metaller. Maybe I've got a different software version? My kit rather behaves like a better programmed tsdz2 while being a whole lot more dependable than these. I've broken the axle as well as the torque sensor of tsdz2 - I like to stand up a lot when riding and the torque sensor of tsdz2 can not deal with that, being the flimsy construction it is. I've ridden about 6000 km with tsdz2 ere it broke yet another time and I lost patience with it.
....
...ps: @Metaller - Does the motor behave like that when riding really hard uphill? I mean, if you have the bike on a stand and the rear wheel is spinning freely or with hardly a resistance, wouldn't it be just that the torque sensor doesn't register any torque being applied and thus the motor doesn't kick in as expected? Just a question concerning the testing methodology.
My problem was more or less solved by replacement of the central shaft with the torque sensor. the engine works with new shaft of pedals better, though it is not ideal. at big kadans (when quickly you twist pedals, 100-120 rpm) pull-rod goes breakthroughs. Also not quite normally reacts to increase in loading on pedals... more definitely does not react in general, works as the simplest pedal-assist about the motor wheel... well though it has ceased to be disconnected on rises.
Perhaps the engine would also begin to work as it is necessary if the seller about AliExpress has sent to replacement NEW shaft and not obviously removed from other engine, with thread clamper traces in bores, but though it has ceased to be switched off on rises... :confused:

I tested not on simple support, I used on the load stand trainer which can create resistance to rotation of wheel and imitate the movement with different loading. As well as on rises uphill on this trainer there was blackout of pull-rod of the motor at emergence of loading.

Aquakitty   100 W

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by Aquakitty » Sep 10 2019 1:59am

Metaller wrote:
Sep 08 2019 2:03am
distantvoices75 wrote:
Aug 18 2019 11:19am
...I have not perceived behaviour like the one described and shown by Metaller. Maybe I've got a different software version? My kit rather behaves like a better programmed tsdz2 while being a whole lot more dependable than these. I've broken the axle as well as the torque sensor of tsdz2 - I like to stand up a lot when riding and the torque sensor of tsdz2 can not deal with that, being the flimsy construction it is. I've ridden about 6000 km with tsdz2 ere it broke yet another time and I lost patience with it.
....
...ps: @Metaller - Does the motor behave like that when riding really hard uphill? I mean, if you have the bike on a stand and the rear wheel is spinning freely or with hardly a resistance, wouldn't it be just that the torque sensor doesn't register any torque being applied and thus the motor doesn't kick in as expected? Just a question concerning the testing methodology.
My problem was more or less solved by replacement of the central shaft with the torque sensor. the engine works with new shaft of pedals better, though it is not ideal. at big kadans (when quickly you twist pedals, 100-120 rpm) pull-rod goes breakthroughs. Also not quite normally reacts to increase in loading on pedals... more definitely does not react in general, works as the simplest pedal-assist about the motor wheel... well though it has ceased to be disconnected on rises.
Perhaps the engine would also begin to work as it is necessary if the seller about AliExpress has sent to replacement NEW shaft and not obviously removed from other engine, with thread clamper traces in bores, but though it has ceased to be switched off on rises... :confused:

I tested not on simple support, I used on the load stand trainer which can create resistance to rotation of wheel and imitate the movement with different loading. As well as on rises uphill on this trainer there was blackout of pull-rod of the motor at emergence of loading.
I'm sorry you've had a bad time with it. But I guess that is all part of the DIY especially with a "newer" motor. I am eager to try this one and another one I found on Aliexpress with an external controller. I don't have enough bikes though!
Rans Enduro Sport w/Sturmey-Archer XFRD8, TSDZ2 open source mod 48v
GT Verb Comp f/s TSDZ2 open source 48v
Diadora Ampio bargain f/s TSDZ2 48v
2020 Diamant 247 belt drive 1000w 9C 48v
Hardtail made from random bits I had laying around, ginormous old Marzocchi fork, BBS02

maitilupas   100 W

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by maitilupas » Sep 21 2019 3:07am

Lingbei motor experience after almost 1 year

Ive made so far 3000km with the Lingbei, is so far bullet proof, no issues with anything. The downside is that is still annoyed with its PAS functions programing, specially with a 500w battery, ive ordered a cable to see if i can change the amps on the pas levels. If i can do this im happy with it, as for the torque sensor maybe in The future ill add something different if possible..

BCD
By the way ppl in this post were mentioning about lack of chain wheels but you can add the ones from bafang they will fit.

Gear sensor:
I have also changed one of the brakes to have a gear sensor , ive add wire from a 5v stepdown converter drom the battery to provide the power.

fifthbro   1 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by fifthbro » Sep 30 2019 6:37pm

I've just got my Lingbei working. The only problem is I had to use spacers to move the chainline by 4.5mm further and now is just awful.

So I am looking for the offset chainring and I am slightly confused which of the Bafang ones will work with this motor.

I thought Bafang has 5 bolt 60BCD, so the distance between each pair of holes is ~35mm and the central hole in the chainring has a diameter of 50 mm.

The Lingbei seems to be 5 bolt 76BCD, with the distance between each pair of holes is 44.5 and the central hole in the chainring has a diameter of ~63mm.

Mebk   1 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by Mebk » Oct 08 2019 3:23am

Hi everyone, we finally managed to produce the 32T crown, with its chain guide. You can view it here: https://www.kitbicielettriche.it/en/pro ... orque.html

rick.schoenmaker@gmail.com   100 µW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by rick.schoenmaker@gmail.com » Oct 15 2019 1:10pm

Aquakitty wrote:
Aug 30 2019 10:09pm
rick.schoenmaker@gmail.com wrote:
Aug 30 2019 3:28pm
rick.schoenmaker@gmail.com wrote:
Aug 05 2019 6:06am
rick.schoenmaker@gmail.com wrote:
Jul 15 2019 10:22am
Since a couple of days I got a Error 4 Hall Sensor issue on my Lingbei mm28.350w with C800 display. As I use the motor for a cargobike, to particular heavy duty biking has been done. Do others have issues yet with the hall sensor? Does it occur on particular circumstances?

Is there a way to reset the controller/computer? I'm a bit affraid to pull the thing off and open it to check the wiring/soldering (and don't want to)
I've been in contact with OKFeet (supplier) and they send me an new Hall Sensor component to bolt on (no soldering). Very helpfull with video instruction for assembly. I'm wondering if more people have trouble with the Hall Sensor or other sensors. Maybe my issues are due to the Dutch weather.
After receiving the Hall-sensor, I opened the motor and delivered a surpise I was afraid of....

At least 50ml of rust water came out. The motor was covered in rust and also elements of the controller. So not only a defect on the hall sensor... After putting it back together I now also get a “Current Error”... The thing is dead I presume

Sadly OKfeet said this is not part of warranty/after sales care. It surely is a manufacturer error on the seals where moisture was able to get in via the ingoing/outgoing wires.

Don’t know what to do now, giving it another chance or seeking an alternative...
You should never assume any of these Chinese mid-drives are waterproof. You have to waterproof them
yourself.
After direct contact with the Lingbei factory I received today a new motor (fairly quick as it was shipped last friday from China). $100 for the motor and $100 postal it fairly cheap as well (OKfeet asked for $236 without shipment).

An extra connection on the main wire from brakes/display/gashandle to the motor was included (maybe for flashing the firmware?).

Now the biggest challenge is to make it waterproof. Still figuring out the best way (silicon kit at the wiring and plastic cover over the motor at least).

Chito   10 mW

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Re: New "Lingbei MM28.250 torque sensor mid drive"

Post by Chito » Oct 18 2019 12:51pm

Hi, I have a mm28.500, I have noticed that it only has 85 rpm of pedaling assistance. this is normal?

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