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Replacement thruster for old Seabotix LBV


(Chris) #1

I use a generation 1.5 Seabotix LBV and have lost 2 thrusters in the past couple of years. I am looking for a reasonable alternative to buying the updated Teledyne thrusters at $1800/unit. Tough to spend that kind of money on an ROV that is no longer supported except with technical advice. Do you have an idea if it is possible to integrate either the T100 or T200 thrusters into a Seabotix ROV? If so, can I use the on board esc, control boards and existing cables or will I need to install additional esc’s, etc…for the motors? Just exploring options to keep this unit running. I’m down to 3 thrusters out of 4, so finding a solution is a priority. Thanks.


(undersearobotics.com) #2

The original Seabotix LBV used brushed motors while later models used brushless motors in their ROV thrusters. Which do you have in your ROV?

When you say you “lost” a thruster, what exactly do you mean? It may be possible to rebuild a thruster if you can isolate what the issue is and then locate replacement parts (motor, components, etc.).

If your LBV is designed to run 3 wire brushless motors, it might be possible to use a Blue Robotics thruster (or motor) as a replacement as long as the power and voltage requirements are the same. But if it uses brushed motors or if you need to replace the Seabotix ESC with a Blue Robotics ESC, that would probably be a much more difficult project.


#3

I think this guy had one of the old red LBV’s with some board problem, maybe he has some thrusters left over…

http://www.fcrov-piloting.com/


(Chris) #4

These are the oil bath, brushed motors.

Sorry for the euphemism. By “lost” I meant the thrusters stopped working. In one instance I could not connect with the ROV until I eliminated the thruster from the ROV.

Everything operates with 3 thrusters, though the ROV was designed for 4. I eliminated the lateral thruster as the the least required for operation.

I like your suggestion to attempt to repair the motors. I suppose I really don’t have anything to lose by taking one apart. My only concern is the oil bath if the thruster is emptied. According to the literature, they are filled in a vacuum and topped off as needed by a rather lengthy process. I’ve done this twice now, replacing the oil compensation tubes.

I agree mixing brushed & unbrushed will not work when the thrusters are paired, but individually they should be okay. The ESC is my primary concern.

Thanks!


(Chris) #5

Thanks! I’ll look into it. Salvaging and scrounging may be my next best option…