Peaucellier-Lipkin 'rotary to linear' linkage. Take 3

thingiverse

This is a revision of thing:338923. I revisited the design because when I recently brought the original design to life in Blender (2.76 using the Physics engine), it became clear that the geometry was slightly off. Only one part has been modified, so anyone who created the original and wants to update needs only to print the base and reuse all other parts. I've posted all the necessary stl files here. Read about the linkage at http://en.wikipedia.org/wiki/Peaucellier%E2%80%93Lipkin_linkage. I based my design on this animation. Made in (mostly Diamond Age) PLA on an Ultimaker 1, designed in MOI. Watch a short video here: https://youtu.be/E7zPRr18zBg. View the Blender animation at: https://www.youtube.com/watch?v=i1RTyFmVfDg. This quote at the bottom of the wiki page is so wonderful it deserves to be repeated in full: Sylvester (Collected Works, Vol. 3 Paper 2) writes that when he showed a model to Kelvin, he "nursed" it as if it had been his own child, and when a motion was made to relieve him of it, replied, "No! I have not had nearly enough of it—it is the most beautiful thing I have ever seen in my life". Print Settings Printer Brand: Ultimaker Printer: Ultimaker Original Rafts: No Supports: No Resolution: 0.2 Infill: 40 Notes: Please check the orientation prior to printing. Note that the base is quite large. It does fit on an Ultimaker 1, though I had to rotate it a bit. I used a brim on the larger pieces. Post-Printing Made in Diamond Age PLA on an Ultimaker 1. PLA is grabby, so to enable this to work relatively smoothly, I had to lubricate it. I used Olive oil, which works well. FYI when designing the nominal 8mm diameter pins and corresponding holes in the linkage, I used a design size of 8mm for the holes and 7.96mm for the pins. I then sized the holes in the printed linkage with a 1:50 tapered reamer. The 12mm diameter hole was cleaned with a straight 12mm reamer. Hand reaming is much more controllable than drilling.