Crank/Cam Prototype – Almost Complete

Sun, 17 Jul 2016

I’ve completed the layout of parts for this Crank/Cam Essential Mechanism. The final tweaks to the cam profile have made the finished mechanism run beautifully smoothly. As the handle is turned the main orange push-rod traces out an almost circular path above the box top.


The pink cams move the yellow cam follower up and down on the push rod three times for each turn of the handle.


The mechanism will make a really interesting starting point for your own paper animation characters, especially as a flying model where the character’s wings flap briskly and the character rocks back and forth. Next step, assembly photography then I’ll release the completed kit.

Comments (3)

  • rossmcsweeney July 19, 2016 at 5:16 am

    It looks fantastic!

    It looks fantastic!

    Very well designed! Compact, neat and tidy. I like it! Can`t wait to try it.

    I`m always excited to see something new from you! I have loved watching your wooden gear progress but I can`t get as excited because I can`t do it myself at home! That`s what I love about paper. It`s so accessible to the average person. I`m seriously thinking about getting a small laser cutter just so I can cut gears myself. Please keep up both projects!

    Have you every thought about adding other materials to your paper models for more varied movement, like elastic bands, string, toothpicks etc? I think I remember reading once that you were a paper purist! 

    Any way! Keep up the terrific work!

  • michael42er July 28, 2016 at 2:39 pm

    The children’s book by Selma

    The children’s book by Selma Lagerlöf, “Nils Holgersson’s wonderful journey through Sweden” has inspired me to assemble this model. The drive model “Crank / Cam mechanism”, with the older model “Swan (scale 1:2)” from Rob for “Agano city” and the puppet figure of me, together make a beautiful ensemble. Video here: https://youtu.be/2xWlAPLfTV8

    "Nils Holgersson" on the swan, paper automaton

    • robives July 31, 2016 at 3:37 pm

      Thanks Michael, that is

      Thanks Michael, that is absolutely delightful! 

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