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A simple movement to I tried to sort of get effect of random movement.

Bob

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Wanted to make wheels turn from side cranking.
Bob

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I'm always surprised when something works as I intend. The mechanism is just a simple wire crank.
Sherry

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Made a pipe cleaner fairy and a needle felted mouse and made them dance together.  Bought some wooden shapes and drilled and assembled it all with glue.
Robin

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Putting thoughts on paper is a great way of solving small problems and working things out.
Ram

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Tethering the two followers to each other introduces some challenges because rotations would cause the string to tighten. To get the kite to flutter and not rotate, I used a few ideas I saw in other people's designs. It didn't turn out as smooth/fast as I was hoping, but I have come to like the inconsistent motion. For the person, I wanted to isolate the motion to up and down so it looks like they are skipping. I added some cardboard to the bottom of the follower to keep the cam centered.

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Wanted to stabilize the hand and head while wagging the finger and getting the side to side motion. Had to add weight to the finger (some magnets). Used 2 eccentric cams for the hand so the finger moves more quickly. And 2 concentric cams for the head with some stops to get a rotating motion.
Courtney

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I wanted to see if I could make the movement rotate back and forth without going up and down. I altered the cams and added a stop and, voila. It worked! - sherry

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I was interested in exploring how a circular motion could interact with an up-and-down motion.  I hit on the idea of planes and the rest was inspired by a William Gibson short story :-)
Stuart

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I initially wanted a rabbit running peeping out only when the other figure wasn't looking. I made a snail cam out of some larger cardboard for the rabbit, so it can move and down a good distance.

I was able to constrain the blue guy, but couldn't really get the timing figured out, so it just kinda flips back and forth. Maybe it should be a cat or something.

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Great to meet you all earlier today! As promised here's a short video of the crank demo machine I showed in the workshop. I hope this recaps on different construction methods, how the cranks can work sideways, how a pivot point can change a movement's potential, and how the height of the connecting rod affects its sweep. Cranks are fine things!
Steve

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I hope after a lot of cam talk you now enjoy cams as much as I do. I promised I'd post a video showing a couple of ways controlling the (annoying when you don't them to) spinning motion of the cams. This one keeps the cam pretty still. As you can see in the video, the gap between two vertical barbeque sticks poked through the top of the box to the bottom, hold the one glued to the cam follower in the same position. It can slide up and down, but not sideways.
Steve

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This video shows how I've used barbeque sticks to restrict the head movements of the mice, and coordinate both heads to come together at the same time. The barbeque sticks stop the movements in one direction and edge of the box in the other.
Steve

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Viennese waltz and a Russian dancer. -April 

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Viennese waltz and a Russian dancer. -April 

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I began with the mechanics following Steve as he did it, then i started with the arms, i saw what movement they made and it reminded me of a waltz and Russian dance with the arms that i happened to have given them - from there i gave them a little dress each. Enjoy their performance! :-)

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I was having trouble with my very heavy moon prop, so I glued two tortillas together and it seemed to work OK.
I wanted the cow to just go up and down, so that broken chopstick was clutch. Thanks for the great workshop today!