Acrobat Arms

Sun, 29 Jul 2012

A quick post showing the arms for the tumbling acrobat model in place. There are two stops to limit rotation. The legs will fit in the place indicated, possible with a paper hinge rather than an axle. I have reduced the weights in the tube to three penny coins total weight 12g. I'm still worried that they pick up quite a bit of speed as they roll down the tube. A friend of the web site who has a plastic version of this automata says that his model has ball bearings with baffles to slow down the roll. Not sure if I can do baffles for coins but I'll give it a try.

<——Edit ——->

I put together this coin tube complete with baffles which slows the coin down nicely. Might need to experiment with different angles and heights of the bump but even as is, it stops the coin crashing too hard into the end of the tube.

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Comments (2)

  • Tank Commander July 29, 2012 at 7:13 pm

    Would something like small

    Would something like small speed bumps going down the length of the coin tube do the same job? I realize that coins are not like cars and are unable to slow down before the bumps but they might reduce the speed of the coins. I am not sure if what I have just said is the same as baffles as I'm not sure what baffles are! :-S Good luck Rob, it is definitely looking very good! 🙂

    Yep, that’s what I mean 🙂 Just putting together a test piece now – RI

  • ijustgolf July 30, 2012 at 11:30 pm

    looking good rob…    i

    looking good rob…    i almost feel like tackling this one myself….    yes, the Tumbler is a project onto itself, but to me, it seems like the thing to design would be a hand-crank powered escalator..   instead of 'looping' those video clips together, why not design moving steps that allow the Tumbler to move perpetually down the staircase…


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