Ratchet and Pawl

by entomophile, published

Ratchet and Pawl by entomophile Jan 31, 2015
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This is a locking 12 step ratchet and pawl mechanism I designed for a project I am working on. http://youtu.be/l4CXz2UywVQ


Printed in ABS on an Ultimaker 2 at 230C with a 0.2 mm layer height. The ratchet is advanced using a standard servo with approximately a 30 degree throw. I used an arduino to control the servo in the video. The pawl is screwed inline 26.57 mm from the center of the ratchet. The center of the servo hub is positioned 25.5 mm out and 38.3 mm up from the center of the ratchet. The ratchet arm is connected to the servo on a 19 mm arm. All of the holes are 2 mm but can be drilled larger.

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Love it! Our robotics team remixed this to fit with Tetrix parts for our robot. It'll mount on an axle that's already driven so we didn't need the servo part, just needed the axle to only turn one direction.

That was what I had in mind. I will let you know how I will modify for our use. I was looking for some way to load the bobbin that goes in an air solenoid for our assembly station. With some changes, this will do exactly what I want.

I have a perfect use for this!! Thank you! I want to use it with my rc 3rd channel and a servo...