reply to post by hellobruce
I don't follow your thinking. Are you saying it would spin longer without the magnets? Because without the magnets it wouldn't even spin once.
Gravity at most would pull the cam down and then back up to about 90 degrees past dead bottom then gravity would pull it back down.....and done.
I have seen these designs before, even built some in college in computer and electronic engineering class, but we had to restart the cycle manually by
hand every turn. His idea of applying a cam to do this at the top, and again at the bottom, is quite good.
I am not convinced this is for real though. As it would have to lose magnetism over time from coercivity from the top magnet on the upper arm, and the
bottom magnet on the base, that the cam manipulates, not to mention wind and friction.
It was working, and I don't doubt it will work quite well for a time, but the magnets losing strength would still cause it to wind down eventually.