Magic Screw for Makerbot

thingiverse

This kit enables users to design and construct unique magic screw threads suitable for 3D printing on devices like Thing-o-Matic and similar hobby printers. By doing so, one can create bolts and nuts where one nut turns normally while the other appears to spin in reverse, as demonstrated in this video (new model data): http://www.youtube.com/watch?v=gx_OKYA3_Iw. The initial version had accuracy issues on hobby-grade 3D printers due to atypical overhangs that might flatten during extrusion. This new 'Magic Screw' design, however, leverages those overhangs by constructing them as straight lines between supported walls. While it remains a conjecture (blog post: http://mysd300.blogspot.com/2011/12/magic-screw-for-makerbots.html), it's an innovative solution to the problem. To start, build the three STL files as provided, and if necessary, tweak them or edit bwbolt.scad using OpenSCAD for further optimization or customization. Don't forget to share your improved model!