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Very pleased to finally get my ratchet mechanism to work. I did find I needed to add a T-peg under the pawl to prevent it from dropping below the ratchet wheel. This also gave me an appreciation for friction--if I were using a ratchet in a final creation I think I'd want something smooth like metal to prevent extra friction between the pawl and the ratchet wheel.
Sandra

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I love this one even though it doesn't work great.  I learned you can't use a metal crank into a wood cam when it's got a lot of tension.  Maybe your can but i don't know how.  I used woods beads and a strong kite string for the snowman and polymerclay for the nose and hat. Robin

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Went to my hobby shop to get wire and found this really crazy graveyard ho train set. I knew it had to be animated. It almost works. I wish the coffin lowered more but I'd drilled the holes. Learning process.
Robin

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This is based on our 2 tortoises Toby and Tolly.

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I played around with various size wheels and linkages for my ‘Shy tortoise’ until I had the desired result. The following upload shows the result
Ram

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for some large scale inspiration, here's a linkage exhibit prototype that some of the developers are working on at the Exploratorium (where I'm in residence this month)
-Ryan

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here's the 'fishing pole' I was working on during the session. I like using a horizontal bar as a little guide for the linkage mechanism
-Ryan

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It's getting close to what I had in mind. - sherry

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I decided to try the slider horizontally.  The movement reminds me of a large animal. Perhaps that is what it will become. - sherry

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While playing with the crank slider mechanism I wondered if there was a simple mathematical way to calculate the amount of horizontal movement at the top of the slider based on the length of throw of the crank, distance of the upper support from the center of the crank etc. Apparently it involves trigonometry so, no. -sherry

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Before really getting started with the kit I decided to sand the ends of the wooden dowels and organize the pieces in small zip locks and containers. I also cut a new slot in the base to hold the grid at a slight 70 degree angle (kinda scary but it worked). Now it's time to have some fun - sherry