I want to share with you some possible leakage issues you can run into…
I live and dive my ROV in cold sea water… 3-11 degree C
I have now found my problem(s) to my leakages…
the cause seems to be:
- I had a end cap epoxy sealing that didn’t hardened… leaving the glue soft letting the water to slowly enter the battery tube. Then I guess the rush in current made the wires in the harness back to the ROV heating up and ruin some of the plastic cover and expose the copper.
this gave the water a passage into the E-tube
OR The plastic cover of the wires in pic.1 were damage in the first place letting the water enter the battery tube AND the E-tube at he same time. Then the rush in current due to salt water in the battery tube increased the pressure in the tube pushing the faulty glue out and letting more water in the battery tube.
In my opinion there is two issues here:
- I mad a bad gluing causing the failure to happening.
- The quality of the wires/ solution of letting all the tiny wires be exposed directly in the water are a weak design. There are no second “barrier” if the plastic cover of the wires should fail some how. In my case cold environment makes the wire shield stiff and hard. If they get bent some how they just crack and are damaged.
It shouldn’t be a problem taking the E-tube out of the ROV with out the risk of damaging the wiring harness due to slite bending of the wires.
How about to design it as a whole cable with penetrators instead as other ROV’s have?