Quote:
Originally Posted by rahilm
we see about 10A of current draw at 7k RPM at the flywheel, which is right in line with what we'd expect from the spec sheet, suggesting we don't have any sources of unexpected load.
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Presumably there is a large load spike when a ball is fed into the shooter. The motor/gearbox/flywheel go from very high speed/low load to (still) very high speed/high load as they start to accelerate the ball up to speed. That is probably causing those pins to work loose. Dynamic loads are tough!
This sort of wear is probably going to crop up for a lot of teams. You might consider some sort of cushioned coupling between the transmission and flywheel. The type I'm thinking of are usually called 'lovejoy couplers', and consist of two metal hubs with dogs that attach to your shafts, and a rubbery bit that fits between the dogs. The rubber will soak up some shock and allow for a bit of shaft misalignment.
Take a look at 'lovejoy couplings' on mcmaster, and see if you can find one that can fit between the fly wheel and gearbox somewhere. Make sure to pay attention to maximum RPM rating, though it appears most of the aluminum parts will work just fine.