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  1. madin88

    Self-Discharge UPDATE On 30Q 141 Cells

    If those cells which have a problem with self discharge could be healed by discharging to 2.5V, they all would repair themselve because those cells (or groups) would, so to say, go down to that voltage each cycle as they reach LVC of BMS before the controller cut power. From my experience it...
  2. madin88

    E-S LMX 64 Bike Owners

    I think you wont be able to use Polychain as it has different tooth profile and if you would use it with 15T pulley it will crack in no time (>22T is recommended)
  3. madin88

    Spring or air??

    Sad but true. 1% improvement to previous model and 99% marketing bla
  4. madin88

    Speedict neptune lite

    Yes how true! would say it only works because for the most part these cables are located outside of the frame and have enough airflow. The problems are the connectors. If an ebike battery has been installed 100x it's contacts might wear out and the resistance increases, and big wires help to...
  5. madin88

    Speedict neptune lite

    If the wires are short, yes, it doesn't add much resistance, but i would not say that it can be ignored since it means that all other parts will heat up more and connectors could overheat and unsolder. 14AWG is definitely to small for a 60A rating and it was right and necessary to use 12AWG...
  6. madin88

    Spring or air??

    Yes thats true but thats probably because MTB or DH have other priorities. Weight is one of the most important things with all bicylce parts, and that Air springs can be much easier tuned and adapted to the conditions of the race track. Each has it's Pros and cons.
  7. madin88

    Self-Discharge UPDATE On 30Q 141 Cells

    Pretty interesting what you found out :thumb: If this desulfating would help to heal 30Q from selfdischarge, would be great, but i have my doubts since most BMS will cut off at 2,5V and then such groups should quasi heal themselves each cycle which seems to not be the case.
  8. madin88

    Spring or air??

    Yes the larger shaft is also a reason but main disadvantage is preload. Imagine what happens if you put a small weight (say 10kg) on a decompressed coil spring. The spring will compress a few mm, right? If you do the same on an air spring, you will find out that it's doing nothing because there...
  9. madin88

    Spring or air??

    As long as weight is not an issue YES, spring will always be better (with the right spring which doesn't need preload) because it has better sensitivity at the beginning of the stroke, whereas an air system always needs to overcome the preload first before it starts moving so it cannot respond...
  10. madin88

    Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

    I am trying to understand the settings for PAS when using a torque sensor. My plan is to work out some basic values one can start with to get a smooth assistance (as usual ebikes feel) from 100W to something like 2000W max. As Torque sensor the Sempu 4.3 is known to work but also Erider can be...
  11. madin88

    APL's DIY axial-flux motor

    Exactly. A tiny gap between sidecovers and spacer to preload the bearing when assembled should be enough to remove axial play. Thats how it is done on most hubmotors (if sidecover screws are loose there usually appears a gap).
  12. madin88

    Self-Discharge UPDATE On 30Q 141 Cells

    30Q selfdischarge (test from docware): https://endless-sphere.com/forums/viewtopic.php?f=14&t=103092&sid=abc8b7e2259830a0147f423c4c907f9f&start=500#p1613728 from 100% soc to 50% (3,7V) within 32h :lowbatt: :lowbatt: Would be bummer if 40T has similar issue. Can you share more infos? maybe...
  13. madin88

    Self-Discharge UPDATE On 30Q 141 Cells

    AFAIK most chargers cut off at 1/10 of the rated current and will not start charging again if you do not reconnect. You would need a Labor PSU set to very low current (similar to balancing current of BMS) and leave it connected. I would say it depends on the battery. For those packs with 30Q it...
  14. madin88

    Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

    The 12F could be a bit weak for this motor and overheat if it doesn't get enough fresh air. Wheelsize and battery voltage also matters if you might be happy with it or not.
  15. madin88

    I need a light enduro frame for next build....

    I would use Sapim Strong 13/14GA spokes with polyax brass nipples 😉
  16. madin88

    How to handle series connection in a moderately large 18650 battery build?

    Hi David, do you have a spot welder? For 200A and 36P (in your case 18p x 2) it would be be sufficient using one big nickel strip with 0.15mm and i think even the one you have would be already enough (if it is pure nickel with 0.15mm). The distance the current has to flow through those...
  17. madin88

    Self-Discharge UPDATE On 30Q 141 Cells

    I had to trash batteries where i used 30Q cells because of self discharge and know about others who had similar issues with that cell. One pack i was trying to manually balance by charging up all groups which had lower voltage, but after 2-3 month it was quasi unusable again because the BMS did...
  18. madin88

    I need a light enduro frame for next build....

    Yes it seems they changed the axle from G060 to G062, but i find that 12mm is undersized for this power (1000W class) and probably needs stronger than usual torquearms. No, the stator is not skewed, but the magnets have that double round shape which might have something todo with cogging (and...
  19. madin88

    I need a light enduro frame for next build....

    This Motor, the Bafang RM G062.1000W is not as bad as you might think. I had one in hands which i need to open so i could take a closer look. It is 18N20P outrunner with double curved magnets (probably to make BEMF more sine?), and it has almost no drag, yes the lowest drag i have ever seen on a...
  20. madin88

    GNG / CYC X1 Pro 3000w

    Could you already find out which sensor it is exactly?
  21. madin88

    APL's DIY axial-flux motor

    As it looks, the two halves from the cores are held together with the countersunk screw so the glue would be mainly have the purpose of filling the gaps and keep everything in place. Awesome :thumb: , looking forward to see how it performs and which values you get for kV and R. Do you have...
  22. madin88

    Imbalance When Empty?

    Yes thats how it is, and one more reason could be the BMS. Lets say the BMS does balance the pack at 4.10V with accuracy of 0.01V and then the pack get discharged to the end of the curve, that small difference from the beginning could increase to 0.10V then.
  23. madin88

    XT 90 antispark

    XT90s are made for RC model controllers which have lower voltage and way lower capacitance to precharge. The resistor would have to be one with 50ohm or so that it doesn't blow when using it with 20s on big ebike controller.
  24. madin88

    APL's DIY axial-flux motor

    Do you think that you can wind the coils when assembled? If so, then i can think of no reason for it to take it apart again. In case that one core brakes and needs to be replaced, i would try to put it out with a hammer, grind off the remains from the plate and glue a new one in. With pins...
  25. madin88

    APL's DIY axial-flux motor

    Yes it would have to be one of those "liquid steel" type epoxy like JB weld (can withstand 300°C) or something similar. When looking at Emrax motor and how the coils are mounted, it makes me think that it would fall apart without the glue.. And if they are doing it this way, then why reinvent...
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