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 […]
from The 3d printers source http://ift.tt/1oHFpB2
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