This is a Trammel of Archimedes ( ), drawn from scratch after seeing another printed version, presumably Thing 5103. Drawn from scratch as an exercise in Alibre, where the '2' designates this is really v2 with filleted corners to make it easier to hold and where the elliptical path just barely misses the guide. When printing raftless with ABS, if you have it too close to the platform the bottom layer might be flattened to too big to fit into the More

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