ROV continuously yawing – same firmware, params, and hardware

QGroundControl
1

Hi everyone,

Our ROV has started continuously yawing in one direction in Manual and Stabilize modes, even with no joystick input.

What’s confusing is that nothing has changed since the last test:

  • Pixhawk 2.4.7 (Pixhawk1 / FMUv2)

  • ArduSub 4.5.7 (ChibiOS)

  • Vectored 6DOF – 8 thrusters

  • Same parameter file

  • Same thrusters, wiring, ESCs, and hardware

It worked perfectly in the previous pool test, but now it spins continuously in yaw.

Things we already checked:

  • Reloaded the same params file

  • Verified thruster wiring and direction

  • Re-did accel/gyro calibration

  • Confirmed no joystick yaw input

Since it happens even in Manual mode, we’re unsure what could cause this.

Any ideas on what we should check next?