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  1. tom355

    GMAC/MAC hub motor servicing + freewheel modification

    My Gmac is from 2018. That bike was 2500w and throttle from the beginning. I bought it in 2022, it was in need of work. I blew the original controller with a shunt mod in the 2nd week. I got an VESC 75100 and build an 52V 72A battery. Fully loaded battery means 4000w. I commuted 5 month and...
  2. tom355

    How many pole pairs does this motor have?

    Thanks a lot
  3. tom355

    How many pole pairs does this motor have?

    In need to know the number of pole pairs of this 2kw motor because i want to run it with a VESC. The hex screws seem to be glued with loctite or similar. I already ruinded one. Before i spend hours to remove these hex screws, only to count the magnets i ask here. It`s from an early ELMOTO HR2...
  4. tom355

    Programming "generic" controller

    How many Volts? I run 52V (fully loaded 58.8) 75A = 4400Watt. When i go full throttle with a full battery my BMS cuts off at the 75A what means the controller pulls more. So, i think the numbers are real battery amps not phase amps. But the thermal design is horrible because that tiny box can...
  5. tom355

    FLIPSKY new 20s 100A tiny controller (vesc based)

    I don`t know
  6. tom355

    FLIPSKY new 20s 100A tiny controller (vesc based)

    The cogging happens under high load what means at the start from zero, and/ or going full throttle from slow cruising. It`s a bit better since i played with the duty cycle and i am not yet done with it. I stopped adjusting because i also wanted to make that cooling solution today. I quit FOC...
  7. tom355

    FLIPSKY new 20s 100A tiny controller (vesc based)

    Do you have any idea what`s the name of the parameter for the " multiple reading of the hall sensors"? I made tiny little steps forward with adjusting the duty cycle. Also made quick dirty ghetto fix for the thermal problem.
  8. tom355

    Programming "generic" controller

    They all need to be programmed with the VESCTool what can be quiet challenging sometimes...
  9. tom355

    FLIPSKY new 20s 100A tiny controller (vesc based)

    I got this home bike roller trainer where i put the bike on and it was possible to work much faster on the problem. I found settings which are not super, but ok for now. On BLDC (no FOC) with hall sensors. I get 100% power from the battery to the motor, only the launch from zero is still heavy...
  10. tom355

    second hand speed pedelec: recommendations?

    Do it in the other direction. Check the market for used, street legal S-Pedelecs with documents. Pick one to modify because you need a monster battery what means you have to get a custom build. So don`t buy a brand with CAN.
  11. tom355

    Motor cuts out on full throttle

    Your battery can not handle the demand. Program the controller to lower amps or get a bigger battery.
  12. tom355

    Programming "generic" controller

    If VESC is an option. These controllers are small and powerfull. Available also for 2 and 3 motors (one controller).
  13. tom355

    DIY Stromer Di2 Charging, Shimano

    Then you will lose the torque sensor. How will you get a PAS function? What about Regen? Want to use a throttle? Then you don`t need to buy a Stromer. Get an escooter grom the beginning....
  14. tom355

    Elops 920E - GPS app Decathlon

    You need this sticker. There is no relation between the sticker and the bike number on the frame. You can check for a 2nd sticker on the battery or on/in the battery housing.
  15. tom355

    FLIPSKY new 20s 100A tiny controller (vesc based)

    Still working on the problem, with support from a guy who sets up VESC controller all day. Higher Amp settings helped a lot but was not the final solution. Meanwhile if fried one controller with settings 160 Amps for LEARNING. No comment. Yes there are multiple ways to brick the controller...
  16. tom355

    FLIPSKY new 20s 100A tiny controller (vesc based)

    I am trying to set up a Flipsky 75100 with a Gmac for quiet some time now. Wizzards are doing a job and as long as the wheel is in the air, it spins perfectly. As soon as i sit on it, under load, it`s a total mess. Virbrating, stuttering and making noises. When i accelerate very slow and...
  17. tom355

    BIG 1KW HUB with VESC

    I played around with these 4 settings for hours. The result is always the same. Spins up great without load, runs horrible under load. There are obviously plenty of users with the same problem. The identification/self-learning process of VESC TOOL seems to work not very well. I have a gmac...
  18. tom355

    PANASONIC ebike battery change

    Did u continue working on that battery? I am about to buy a bike with a 36V Panasonic and refit the battery with new cells, but i heard that the BMS do not allow that. They seem to remember the reduced capacity and keep that also with the new cells around.
  19. tom355

    Bosch Batteries

    Bosch has not been hacked yet that i know. You can refit old powerpacks easily with no cells. You don`t have to keep current on the BMS. But you have to keep the right sequence of plug and unplug the cables. disconnect: first B+ -> balance plug small -> balancer plug large last B-...
  20. tom355

    Better hill start modifications

    A shunt mod is easy and would help for a stronger launch if your battery is able to deliver the amps. It has no effect on the speed limit and the fact that you have to pedal. But you should also be in the right gear when you launch. Do not ride slow or launch with your longest gear.
  21. tom355

    Frankenrunner Setup help for a newbie.

    So did you get the Frankenrunner? How was the setup?
  22. tom355

    Nickel Strip -- looking for reliable source

    The following Aliexpress Shop has pure Nickel. I bought there. It`s not rusting in saltwater. And there are no sparks when you Dremel it. https://de.aliexpress.com/store/718097?spm=a2g0o.detail.1000007.1.37f4470cO8ohkr
  23. tom355

    Fat bike brakes upgrade

    1. Large Disc 203mm in the front. 180mm in the rear. 2. 4 Piston Brakes. For example Magura MT5. Or Hope Tech 4
  24. tom355

    Opinion about AliExpress lithium cells

    Often the cells are not new and capacity is 20-30% lower than stated.
  25. tom355

    I want to connect a torque sensor to this controller

    Do you know this ebike controller? Someone used it with a throttle only and cut all the other wires. I want to connect a BB torque sensor. Do you know how?
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