@HMS It may be a shorted stator on the thruster.
Here is a check you can do to check to see if your thrusters are shorted (you should be able to do this with your thrusters still on the ROV). We did these tests on a known bad thruster:
- Take a multimeter and set it to the Ohm setting. You should have a “No Connection” indication when the probes are not touching; “OL” is what we have indicated for ours. This is what you want you want the thruster to read for the following steps.
- Remove the shaft collar and touch one probe tip to the little bit of metal stem below the plastic bearing. Touch the other probe to one of the bare wire ends.
- You should get a “No Connection” indication if the thruster is good. If it is bad, then you will get an ohm or resistance measure as shown in the picture.
If you find a bad thruster or thrusters send us an e-mail at support@bluerobotics.com and we can begin the RMA process.