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I saw a computer simulation of this mechanism on Youtube and decided it would make an interesting and colorful hand-cranked wood model.

I used red oak for the base and 2 main vertical pieces. The moving pieces are made from hard maple, and then dyed with a water based dye.

The finished model runs very well, with very little friction.

The kids should enjoy this one. A couple times a year with no virus, I take most of my wood toys to public events so the kids can play with them. Usually, I find the adults have as much fun as the kids playing with them :)

To see how I designed and built this model, see my woodworking web site.

I also made a Youtube video of the model in action, you can use this link to see the video.

Thanks

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I cut all the gears on the scroll saw. They have 20 degree pressure angle, 7 diametral pitch. I used GearDXF program to generate the profile of the gear. Then

-print out paper pattern for gear
-glue pattern onto blank using white Elmer's glue
-drill shaft hole
-scroll saw cut all gear teeth
-wash away excess paper and glue with warm water and a rag
-dry moisture from wood in oven at about 120F for at least 15 minutes.
 

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Nice job!!!
For some reason a two armed bandit comes to mind?
 

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Thanks for the post DM... I've always been fascinated by gears and only recently started playing with the concept…

Hope you don't mind… though it's a compliment in disguise… there might be a laser cut MDF version of this here at LJ… too late to delete your Warehouse model… it's been unashamedly plagiarised.
 

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Thanks for the post DM... I ve always been fascinated by gears and only recently started playing with the concept…

Hope you don t mind… though it s a compliment in disguise… there might be a laser cut MDF version of this here at LJ… too late to delete your Warehouse model… it s been unashamedly plagiarised.

- LittleBlackDuck
My sketchup drawing has the nominal distance between gear centers. I find for wood, I must add about 3/32" onto the gear center distance for the gears to run smoothly.
 
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