1/2 the turns and double the wire cross section for twice the kv & 1/4th the resistanceā¦
iāve noticed changes to the rotor velocity at no load speed are directly and linearly proportional to changes in electron drift velocity when the motor is stalled.
I saw a old vid from enertion and they replaced a meepo esc with the unity and it had a faster acceleration and top speed. Im pretty sure backfire and meepo use similar amount of amps on their motors and both with 30 amp output batteries. I dont understand, if the motors r getting 10 amps max on backfire esc, it still has WAY more torque than with focbox.
Meepo hubs run at about 20A. Iād try that on yours, and see how that feels.
There are a ton of settings in the vesc tool that could be causing your problems - Your remote/pwm could be wrong, for example.
Maybe I could pay someone to rewind it for me? I would just fuck it up more than it already is
U got the stator off and half way there.
How hot is it expected the motor to get in normal use?
My motor seems to get hot pretty fast.
Not too hot to touch but Iām only riding say 10 mins. So if I was riding 20 mins it may get ridiculously hot.
Why would you not use all the teeth? How does that affect the performance of the motor?
Is there such a module that plugs into your balance wires and itās only function is to transmit cell voltages via bluetooth?
If not, who here has the skills to put together such a device?
I think you could do this with an esp32 since it says it can support 18 analog to digital inputs but there are caveats to that (namely have to disable wifi while using some of the ADC pins) https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/adc.html
There might be some variant of the STM32 that has enough ADC but typically those use some external Bluetooth or wifi module whereas the esp32 has it all on one chip (different architecture too xtensa vs arm but can use C code and a compiler for either).
So yah not sure it exists seems not extremely hard but maybe not trivial (each cell is 3.0-4.2V range though which is good for any microcontroller that allows 0-5V for the ADC input)
Doing anything that has an application support element to it is time consuming though too should add that beyond making it work once there are thousands of Android devices out there and a small armful of iOS ones at this point.
wayyyyyy over my head 
i just want to buy some of them! If somebody would make a nice compact module that does that, Iām sure there is a good market for them, even outside of esk8
Basically ADC takes a voltage and converts it to some number on Arduino 0V is 0 and 5V is 1024, 2.5V is 512 (half way between 0 and 1024) so if you want to measure 10 cells you need 10 ADC pins and need something to support the Bluetooth connection.
The temperature at which the magnets start to degrade is around 80 degrees C, or 176 F - too hot to touch, and the stator - the wire, the hall sensors, the glue, etc are able to handle even higher temperatures.
If your motor is sensored, it likely has a temperature sensor in addition to the three hall sensors, and the vesc monitors this and will limit power to prevent the motor from overheating.
obviously it would need to accept all the wires, but the rest of the componentry should be relatively small yes? Like much smaller than a small bms.
Doesnāt have sensors anything I should do to keep an eye out? I ask because I am pushing it to the limit up some hills it is lagging.
Yah check out esp32 breakout boards on Amazon they are pretty small things but would need to add some balance port or adapter to it and find one with enough of the right pins ābroken outā so you can access them ( or have a custom board made but that is itās own can of worms )
Ok had a quick look. There are heaps of different types. But this is wayyy beyond my skill base and I have no desire to add it to my skill base.
Who wants to make one?
Yah exactly so just a matter of finding or making one since they have Bluetooth and the conversion of voltage to data youād need but other side is making an app to consume the data maybe bug Roman :D. Guess sort of what metr does too but just more direct/temporary
After a hard run, check the temperature of the can by feel, and the motor mount too - the heat from the stator will be conducted to the mount, and the mount will often be hotter than the can.
Basically you can run them pretty hard - If the can or mount is too hot to hold your hand on, then youāre probably getting close to damaging stuff.
Metr relies on a bms connected to the ESC. I want to eliminate BMS, but yes, Roman was my first thought of somebody who may have the skills and motivation to produce such a module
There are a lot of different ways to wind a motor with a given number of magnet poles and stator teeth, and each has different characteristics - Many donāt work at all, some work poorly, some work great. the LRK winding scheme allows a lower KV for a given number of turns than most (any?) other pattern. Thereās a ton of magnetic physics shit behind it that I donāt understand. Every time Iāve rewound a motor, I just used the recommendations from the calculator here.
