[ConKbot of Doom]

On our arm we are using a worm gear to prevent it from being back driven. The smallest worm gear we could get was 20-tooth, and a 20:1 gear down on the van door motor is too slow, so we had to gear it up 6:1 (or should that be 1:6...) first. Now this is for our arm, which won't move more than 300 degrees or so, you would probably need a lot more gearing up for a winch. Had to get some thrust bearings to support the worm.

It would probably be overkill for a winch, a servo controlled latch would probably be easier, but just sharing what we did.