Unexpected Motor Behavior on Pixhawk6C with ArduSub

Hardware Other Hardware
1

I am building an underwater drone using a Pixhawk6C running ArduSub 4.5.5, connected to eight BLHeli_S ESCs. The motor test works normally for all motors.

However, when I arm the system and control it with the joystick, the motor corresponding to the stick input responds correctly, but all the other motors periodically spin slightly in sync, even though no input is given to them.

I tried increasing the stick deadzone, but this behavior did not change. Since the vehicle is in Manual mode, I expected that only the commanded motors would respond.

Is this periodic movement of the non-commanded motors considered normal behavior, or is it a sign of an abnormality? If anyone has experience with this, I would appreciate your advice.

2

Post the parameter file. It’s not clear how you have configured 8 motor outputs. Or a link to a .bin log file.

3

I sincerely apologize for the very late reply. I checked the deadband settings on the joystick configuration screen and recalibrated it. After performing another motor test, it is now working properly.