Hello, i sorta finished my first build, but i have a huge problem.
Throttling from standstill works fine, but of course the motor will cog a little bit when i do that, because of the weight on the motor.
But if the board is rolling downhill and i don’t touch the throttle, meaning 0%, as soon as i accelerate the motor will cog and throw me off. The board will instantly stop and make screeching sounds. The same thing happens if i brake, but not always. The brakes usually work just fine, but sometimes the brake won’t respond until i brake a lot, then the board stops and cog. When i’m going downhill the brakes sometimes stop working aswell, basically the brakes completely die. If i jump off the board and throttle a bit forward, the brakes will work again. The cogging only happens when i’m not touching the throttle, meaning if it’s at 0% throttle and i move the thumbstick in either direction. Sometimes i can throttle from standstill and if i keep the board at speed then brake, the brakes will work just fine, but If i then start to accelerate again, the board will stop and cog.
Share some info about your gear… Battery, Motor etc
It sounds like you haven’t done, or didn’t apply a motor detection.
Yes, i’m using a torqueboards 6374 motor. 36/13 gearing i THINK. I use a 50 volt 18650 battery, 9450 mah. Built it myself. I use the enertion vesc-x. I’m also using the winning remote. Orangatang kegel wheels.
Hmm i have done the detection and hit apply, is there more to it?
Were the VESC-x’s capable of 12s?
Did you write config after that then reboot VESC?
Yes it’s capable of 12s and i did write and reboot.
What is your motor KV? It needs to be 170kv max in order to stay within the erpm 60000 limit
It’s 190 KV. What erpm are you talking about? I could also say that when i try to spin the motor with BLDC, it just makes a clicking sound, it won’t spin.
Motor max 80
Motor min -40
Batt max 40
Batt min -15
But it does sound like your hitting your set erpm limit
You set the erpm values to 60000.
If you have 190kv and 12s it means -
12*4.2[v]*7[poles]*190[KV] =~ 67,000.
Try checking the “hit erpm with negative torque” check box and try again, it might help.
Ok i put BR ERPM to 60000,00.
But this happens when i do calibration: https://www.dropbox.com/s/7fe5pjhn7m1chd9/IMG_3884.MOV.mov?dl=0
Hmm, Its seems like the motor loses it’s poles position for some reason.
Slightly increase your low duty at detection to about 0,1… but shouldnt make a difference in the parameters received
Wow thanks, it works! But what does the Min ERPM really do? It’s at 850 now.
My guess is you’ve got a loose connection. Perhaps you haven’t done motor detection. Do you have hall sensors or not?
that’s how you street your face
Hmm Then I probably got it wrong