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  1. M

    New "TSDZ2 Torque Sensor Central Motor"

    I have an issue with my TSDZ2 that I don't understand. I left it outside on a cold and wet night (0C 100% humid and rainy), I normally leave it inside at night. The next morning it didn't even turn on, the controller shorted, and I had a spare at work, replaced the controller and it turns on...
  2. M

    New "TSDZ2 Torque Sensor Central Motor"

    Hey, I am looking to build 2 bikes with this motor after seeing the fact that you guys developed a open source firmware for it. This seems like absolutely fantastic work and is a mayor bonus for this product, thanks to all involved! One of the bikes is for in the Netherlands, for a flat 15km...
  3. M

    Power / Torque Sensor Roundup

    Thank you for the writeup, makes it clear there is still quite some work to get a torque sensor setup. The Beamts does have an advantidge over the bb setups because it does mnt need CA3 making it allot cheaper if you do not have that. The Beamts seems to have allot of settings by itself. Any...
  4. M

    Wave Ebike another Indiegogo backed Alibaba quality bike

    Well they do exist because you just found it on Alibaba.com But do you know why they where not a widely available mass marketed product? Maybe i should just start a indigogo campain for the Yellow version, it looks much better and its yellow so i am sure it will be faster aswell...
  5. M

    My workshop (by popular demand)

    Sick shop man! that is very well layed out. Love the retractable racks with tools on it that are strong enough to do actual work on. One thing that could be better is to put all of this in a container, then you have a moveable do it all diy shop forever :) Actually might not be a bad idea to...
  6. M

    Power / Torque Sensor Roundup

    Yeah there is a rather big lack of information about torque sensors and setups on this site. Most people seem to be happy with there throttle setup or standard rotational pas. This sort of makes sense if you want a high power setup or don't want to work yourself. But if you have ever ridden a...
  7. M

    My fast road DH Comp - 2.5kwh 18650's/Mobipus/QS V3

    Nice build man, glad to hear you are okay after the crash As far as i can see there are no lights on the bike, maybe put those on to make sure you are a bit more visible? I know people in cars have a hard time seeing bikes in the first place and you are quite allot faster then they might...
  8. M

    Custom Bosch / Yamaha battery

    Not all 3500 or 3200 cells are 4.35V http://www.dampfakkus.de/akkutest.php?id=577 http://www.dampfakkus.de/akkutest.php?id=537 I have opened Bosch packs they are 4p 2900 cells from Samsung, i am guessing that Yamaha uses the same cells. Both brands do not seem to want to go bigger size...
  9. M

    Leaf motor Build/Questions

    I'd say its a shame for the cycle life and capacity of the pack to make a 60 amp pack that you are hardly going to use if you plan to drive 30mph. make a pack yourself that can handle a current that stays within reasonable specs. For example make a pack of 3200mah Samsung INR18650-32E or LG LG...
  10. M

    48V configurations - versatility -

    were do you guys get the bargain bin and scavenged 18650's from? And is it really worth it? With 2900 mAh cells going for about 2.40 euro's per cell you should have a much easier time making time making properly controllable packs that will probably outlast the scavenged packs. I understand the...
  11. M

    Samsung 30Q INR18650-30Q 3000mah 15a cell

    Extremely interesting data! Thnx allot for doing these tests! Just goes to show how much the charge&discharge routine can change the life cycle of cells, would be very cool to continue these tests for more cells to get a indication of a optimal charge routine for these cells. I have seen...
  12. M

    Mando Footloose (e-bike without a chain)

    I rode these, there absolutely horrible You peddle and it goes, so far so good. Then you notice that if you peddle harder it sort off feels like its slips, that apparently was the dynamo engaging. So when you have the slipping feeling it is generating energy. However the cadence and power...
  13. M

    Leaf / leafmotor / leafbike high efficiency 1500w motor

    I have bought from Aliexpress and yes you have to wade through piles of crap to get a nugget of gold there but believe me there are good resellers there (bought solar cells and Mppt's). I will mail them some to get a feel of the companies. I have mailed Leafbike about data sheets for the 500...
  14. M

    Struggling to understand consequences motor rpm

    Yes this is true, however it is also entirely untrue for the example the OP gave If you have a motor that is running at 400 rpm at 36V, and then double the voltage to 72V the motor will run at 800rpm, the amount of amps will dictate the torque. But if you want a ebike that only runs around...
  15. M

    Leaf / leafmotor / leafbike high efficiency 1500w motor

    Hey, I am seeing these things pop up all over Aliexpress for much less then on Leafbike.com i am pretty sure this is the same motor. What do you guys think, is it the same one...
  16. M

    Marathon Plus Tour, not so flat less...

    Really do not know how you broke 2 front forks, but the flat is just bad luck mate. Like i said, use the roadstar compound schwalbe tires and inflate properly and you will not get more flats then on a Vespa. A Vespa should get way more flats because of the rather large surface hitting the road...
  17. M

    Assistance required, you opinions needed!

    Hey fellow Dutchy I sell Ebikes (and high speed ones) for a living in The Netherlands and this is partially correct, the limit on the 45kmh class is 500 watts and they have only just began registration on the high speed bikes. The problem is though that how can a cop see the difference, first...
  18. M

    Large RC models soon using 18650 cells

    He is using the wrong cell though :P http://powercartel.com/2015/02/test-results-for-lg-inr18650-mj1-3500mah-18650-li-ion-battery/
  19. M

    Oil cooling your hub- NOT snake oil!

    Wouldn't the coolest (pun intended) way of doing this be using a refrigerant, make it about a quarter full with a refrigerant that evaporates at around 20 degrees Celsius. That way it will take allot of heat from the stator when evaporating and will then slowly condensate on the shell. This...
  20. M

    Marathon Plus Tour, not so flat less...

    Actually in my experience stuff does go through Marathon Plus tires quite easy, it usually just isn't long enough to actually penetrate. However after many years in Amsterdam as a bicycle repairman i have see many strange things going trough tires, but especially long pyramid shaped pieces of...
  21. M

    Struggling to understand consequences motor rpm

    Your case is actually quite simple, you just need data to know how much it will matter. lets say that you have a 26 inch wheel with a 2 meter Circumference. Making 25 km/h about 208rpm Lets say motor 1 is the high speed one, it has a efficiency of 85% at 400 rpm loaded and a 75% efficiency at...
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