SB_0000002 Critical service bulletin for Cubes Purchased between January 2019 to July 2019. DO NOT FLY

Mandatory Safety Bulletins
314

@rmackay9 @philip

Hi, I have Quadcopter with Black Cube 2.1, AP 3.6.11 with the following prameters:

(INS_USE==1, INS_USE2==1 and INS_USE3==1, EK2_IMU_MASK==7)

I’m getting pre-arm errors of ‘Inconsistent Gyros’.

After many tests with my cube (Gyros / Accel Inconsistent) seems to me the only way I can avoid this without having to reboot is to disable IMU2 (i.e INS_USE2==0)

I know I’m loosing IMU redundancy, but I wanted to ask:

Will the IMU switching still work in case of an IMU failure with only 2 IMUs enabled (INS_USE==1, INS_USE2==0 and INS_USE3==1, EK2_IMU_MASK==5) ?

Is there a way to check this?

Thanks!