Abnormal behaviour (Spinning) of Quad in Mid flight

Cube Autopilot
1

1- During auto mission quad starts spinning and when I gave RTL command through MP returned back to Home location .
2- during take off it also do spinning
3- please check my flight log

https://drive.google.com/file/d/11Xt4Tsb0cRe98BjVsP9p_7_05BUqg0Gc/view?usp=sharing

2

You forgot to set permission for your file.

3

No access to the log file, it’s not shared correctly.
Uncontrolled yaw is usually a mechanical issue like twisted motor mounts or arms, or even frame flex, that is too much for the motor torque to handle.

4

@xfacta @Alvin I have changed the permission please check it

5

As expected the motors are fighting a physical yaw issue the whole time it’s airborne. CCW motors (1 and 2) are working really hard and CW motors (3 and 4) are hitting minimum.

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This is affecting pitch and roll stability too, so after the yaw issue is fixed do another test flight and we’ll look at the rest.

Set these:
BATT_ARM_VOLT,22.1
BATT_CRT_VOLT,21
BATT_LOW_VOLT,21.6
MOT_BAT_VOLT_MAX,25.2
MOT_BAT_VOLT_MIN,19.8
BATT_FS_CRT_ACT,1
BATT_FS_LOW_ACT,2

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