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printable marble pump

by erdinger Sep 10, 2013
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What stops the balls from coming back down?
is there a spring in the hole inside with sometihng on it to stop the balls just going up and down?

stopplate.stl prevents the ball from falling back down. It is pushed back by a spring that is located between the knob of this part and in the long hole on the very left of the green part on the second picture.

Sweet, now I just need to find a spring.

I was thinking about making a marble machine and found this. I have no idea what a marble pump is, nor heard of it.

You can find a demo of the mechanism right here: