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FOC motor just grinds on speed command, spins up smoothly during parameter calibration

Submitted by mmiles19 on Wed, 2022-02-16 23:21

I'm struggling to run a brushless motor via my VESC 4.12 controller in speed control, however, this was all working fine a few months ago. Now, when I command a speed via vesc tool GUI, the motor just grinds and I get the current/RPM sensor data linked below. When I tried to update the FOC parameters, during the process, the motor is spun up beautifully with no problem. Can someone explain how that might be, and/or help me figure out how to get speed control working again on my controller?
https://ibb.co/KyxpNdP

Undervoltage Fault

Submitted by gazlinux on Tue, 2022-02-08 02:26

Can someone point me in the right direction to start troubleshooting undervoltage fault code?

I get the motor spinning with remote but intermittent fault codes. Not using a BMS.

Motor:              Brushless  Filipsky 65161 100KV
Input PWM:       Maytech Eskate Remote VESC MTSKR2005WF V2
ESC:                 Firduo HL200 75V 200A ESC
Vesc tool:         version 3.01
Configs:           Ran motor and input wizard (PWM Current no reverse with break), adjusted motor poles to 6, set battery cutoffs for 14s9p lipo

Arduino PPM disable regen

Submitted by jeengerbread on Thu, 2022-02-03 00:09

Hi! 

I have an arduino that is hooked up to my ESC via PPM input, with the control type set as PID Speed Control / No Reverse. 
When the arduino sends the Min/Center PPM pulse, my motor resists motion and does not spin freely. 

How do I get the motor to spin freely when the arduino does not sends the 'neutral' pulse length?
 

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