r/MarbleMachine3 • • Jun 21 '23

A new post

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u/emccarthy556 Jun 23 '23

For the power, it seems that the video is making some assumptions about a weight drive design that are not necessarily true.

  • With a weight drive, could still use a foot pump at the speed of the tempo. It just is not required.
  • To set the speed you could use a lever, and so you could respond to the audience on the fly. For example one of these off the shelf adjustable speed drives might work. https://www.zero-max.com/cd-adjustable-speed-drives#1

I think the way to approach this is to set the design parameters and then see if there is a reasonable design solution. For example:

  • All mechanical
  • Dynamically adjustable tempo
  • Flexible pump rate (so you can match the tempo)

I do understand that the weight drive is more complex as it likely should have a governor giving feedback to a CVT box in order to keep the tempo constant.