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VESC makes the cute sound, but motor is only jerking back and forth.

Posted: 23 Dec 2017, 19:15
by amund7
Setup:

BBSHD
Vesc 4.12
BLDC sensored
Ran fine the whole summer, while duct-taped and cobbeled together
Bought an aluminium casing from ebay, put it in there
afther that, this:

https://youtu.be/SJdSP6hwtLI

You need sound to hear it, but throttle increases cute BLDC noises
Motor only jerks and kind of tugs the chain a bit.
I suspected the hall wires, measured everything, no shorts, no opens. Double checked all other wiring, can't find anything wrong.
Also measured for shorts between phases, nothing

Weirdest thing is this:
If I run the auto-detect sequence, motor spins perfectly!
Tried to switch to sensorless, no change. Through vesc connect pro android app, not sure it stores the settings correctly. It is horrendously buggy.


Any ideas?

Re: VESC makes the cute sound, but motor is only jerking back and forth.

Posted: 24 Dec 2017, 13:04
by ThierryGTLTS
Did you press apply for the detected parameters and write the configuration to the VESC :?: :!:

No other ideas, if the detection is perfect.

Thierry

Re: VESC makes the cute sound, but motor is only jerking back and forth.

Posted: 28 Dec 2017, 23:47
by TrevM
In the video, red LED is flashing 3 times, I think your DRV8302 is blown

Re: VESC makes the cute sound, but motor is only jerking back and forth.

Posted: 02 Jan 2018, 13:53
by amund7
If you mean the red led on top of the bike frame, that's a BLE UART chip. But I didn't think about that the VESC may be trying to tell me something. There are some red and blue flashes as it boots up, and gradual white as I push the throttle.

Can you tell me / do you have a link to what these blinks mean? I just googled it, and what I found (in esk8 forum) says that three blinks means everything is good...

Keep in mind that this bike was running fine until I basically put the VESC in a case (means I unplugged & replugged the wires). Hope that can't blow the DRV chip...