Cabaret Mechanical Movement: Understanding Movement and Making Automata by Gary Alexander & Aidan Lawrence Onn

Author:Gary Alexander & Aidan Lawrence Onn [Alexander, Gary]
Language: eng
Format: epub
Tags: toy, England, make, automata, United Kingdom, Cabaret Mechanical Theatre, London, DIY, mechanical, sculpture, maker
Publisher: Cabaret Mechanical Theatre
Published: 2013-06-23T22:00:00+00:00

Ratchets

Up until now we’ve been looking at mechanisms which give a continuous motion – as long as there is an input there will be an output. The ratchet is a mechanism which gives a motion that is not continuous. This is known as stepped or intermittent motion.

The ratchet is a wheel with notches cut into it. A pawl pushes against the notches and drives the wheel around in steps. A second pawl (or detent) stops the wheel from slipping back.

Some screwdrivers have ratchets so that you can keep the driver in contact with the screw. You have to set a switch so that the ratchet turns in the right direction for tightening or un-tightening.

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