Saturday, August 16, 2014

Grinding for mine

Tonight we spent time cleaning up the excess epoxy potting and re-testing the motors. Before grinding, these motors tested as electrically waterproof but that was before the propellers could be attached.

Richard trimming away epoxy potting

As long as we don't trim too much epoxy off the motors they should stay waterproof.

But they didn't. On one motor we lost all electrical insulation to the water.

electrically leaky motor

We hoped that touch-ups on these tiny spots on the motors will recover the electrical insulation and still allow the propeller bells to fit over the motors.

... And they did! The motors now show infinite electrical resistance to water and the propellers fit.

back side closeup of potted ROV motor

front side closeup of potted ROV motor

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