rotopuncher

thingiverse

More than an OpenScad exercise, this thing can prove incredibly useful! This is a fully parametric model that lets you explore and visualize different configurations of a rotation-to-translation mechanism using the "punching machine" principle. Download it, start animation mode, and try new axes and arms configurations! The default one features a nice auto-lock mode at maximum extension (135°). Too bad, I uploaded an animated GIF but it shows as a still image. You can download it from the source files section. Instructions First, you should download the source file and start OpenScad's animation mode. Now you can try changing parameters: Bx, By to position the fixed pivot point of the puncher, Ax, By to position the fixed pivot point of rotation source, ra1 and ra2 for the length of punching arms, r1 and r2 for radii of rotating arms. Not all values will lead to working results. Coming soon: a "print mode" to layout parts in a printable way.