Robot held up pretty well. One gear fell off it's bearing due to a loose press fit. One chain broke in an offseason due to a very rare circumstance. One section of sheet metal got a good dent in it. Not sure how, but it doens't hurt anything.
The one major "problem" (more of an annoyance really) is that all of our wheels bent due to a design flaw that I missed and a type and magnitude of loading that I never predicted to be such. So the wheels wobble a bit. Surprising considering they were machined out of solid 6061 T6 and had 1/4" thick spokes, but now after the fact, I see exactly why. I know exactly what to do to make sure that doesn't happen.
A couple lessons learned is to spend a little more time thinking about different ways the game will turn out to be played. It was about stacking fast, not stacking high. And it was about avoiding penalties, not fighting the opponent. We didn't realize this until it was too late. The arm was too long and too slow.
Also, not enough effort went into the end-effector design.
Anyway, there is no such thing as a "perfect year". But as long as we know our mistakes and how to correct them, every year just keeps getting better.
