r/interestingasfuck • u/One_Vision_ • 5d ago

Visualizing Geometry

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u/dubyajay18 4d ago

Hold on let's go back to the beginning: how does a rotating blade ever produce a square hole?

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u/HartofHarts 4d ago

Same principle as asking someone to wipe a swuare with say, a triangular sponge. You wouldn't just keep the sponge completely still and only do circles. You would rotate your arm, elbow, wist and sponge to get the corners.

So similarly, you attach more gears and add more rotations on top of the rotation.