Weekend project: 3D printable Trammel of Archimedes

Weekend project: 3D printable Trammel of Archimedes

Instructables user [mtairymd] has designed a 3D printable Trammel of Archimedes, an ancient mechanism used for tracing out an ellipse. According to its creator, the 3D printed trammel can be built for around $22. Here’s a quick mental puzzle for those who skipped math class at school: If you didn’t have any oval-shaped objects to trace around, how would you go about drawing an ellipse on paper? A pair of compasses won’t work for anything besides circles and arcs, and you’d need superhuman skill to draw one freehand, so what would you do? Thanks to an ancient drawing instrument, […]

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