Laser cut Geneva Drive mechanism

Designing the gears to fit inside a laser cut Automata

The mechanical marvels that are the specialty of Rob Ives don’t just come together overnight. It takes a lot of careful planning and prototyping to get those gears working just right.

In this recent blog post, he reveals the mechanism that will be at the heart of an upcoming Automata. This arrangement of gears is called a Geneva Drive, and it was originally used as a safeguard to prevent clock springs from being over-wound.

“…a particularly interesting mechanism. There is a little window in the background of the model. Through the window you can see a portrait of a woman. As the mechanism runs I need the picture in the window to change to another portrait, then another, then another… and so on. I need the picture to be stay still for a set amount of time then flip quickly to the next picture as the mechanism runs.”

Rob designed the parts in Illustrator before laser cutting his prototypes. It will be exciting to see the final outcome, where these gears will work their mechanical magic.

You can learn more about the Geneva Drive in an earlier blog post from Rob, which features an animation of the gears in action. We often see Ponoko users creating laser cut gears from acrylic, card and wood. Perhaps this adaptation of the Geneva Drive will get your mind turning as well!

via Rob Ives: Notes

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