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Rubber-Band Escapement Test Jig - Maker Block Edition

by syvwlch, published

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Rubber-Band Escapement Test Jig - Maker Block Edition by syvwlch Apr 14, 2011

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Summary

Maker Block asked if there was a way to have fewer, larger teeth on the escapement wheel, and thanks to the power of parametric design in OpenSCAD, the answer was a resounding yes!

With the larger teeth, this should be much easier to print.

(EDIT: added a beefier, thicker version, slightly smaller so the pendulum fits inside the build platform. Duncha love parametric designs?)

Instructions

As with the original:

Print out the drum, the pendulum and the support.

Attach the support to a vertical surface, and slip the drum and pendulum onto their respective pegs (see jpeg for what goes where).

Attach one end of a rubber band to the side of the drum, wind it around the drum a couple times (nothing too tight, just a little potential energy for the machine) and attach the other end to the remaining peg.

Push everything as far back as it will go against the stops, making the pendulum's escapement pallets mesh with the drum's teeth, and let go. Give the pendulum a gentle nudge to get it going.

Write an angry comment here telling me it didn't work! ;-)

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Jul 10, 2015 - Modified Jul 10, 2015

It not works as is.
Sticks not fits at holes.
Left corner of pendulum must be 2 mm longer.
Gear must have border for thread.

Yup, that is indeed how I plan to power the actual clock, except the barrel and weight would be mounted on the slowest gear in the gear train, not the escapement. That gears down the power, since the escapement doesn't need a lot, and it increases the time the clock will run for a given length of string!

The rubber band seemed easier for now.

Really interesting work. With the mechanism mounted vertically on a wall (as it is supposed to be), you could wind some string around the ecapement wheel, attach one end to the wheel and have a small weight hanging from the other end to power it, like a grandfather clock. However, I think this would interfere with the pendulum at the moment.

Oops. Sorry, my internet had some kind of seizure. I didn't notice it re-posted 3 times, and forgot my username. Admin, please delete. Again.

Really interesting work. With the mechanism mounted vertically on a wall (as it is supposed to be), you could wind some string around the ecapement wheel, attach one end to the wheel and have a small weight hanging from the other end to power it, like a grandfather clock. However, I think this would interfere with the pendulum at the moment.

Really interesting work. With the mechanism mounted vertically on a wall (as it is supposed to be), you could wind some string around the ecapement wheel, attach one end to the wheel and have a small weight hanging from the other end to power it, like a grandfather clock. However, I think this would interfere with the pendulum at the moment.

Oops. Sorry, my internet had some kind of seizure. I didn't notice it re-posted 3 times, and forgot my username. Admin, please delete.

this is really cool but we miss some videos!

I think we're not quite there yet. :-)

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