Parametric Annular Fan duct for centrifugal blowers

thingiverse

Parts fan for my kossel. I had a fan and I didn't feel like buying the one that fit the previous version so I made a parametric version... Pardon my coding. Changed a thing or 2 to try and improve printability, extended the tab for pivoting as well. *** Changed mounting point for fan to be controllable rather than some magic number derived from strange math relationships. changed screw size math so you specify diameter not radius as previously. *** initial tab math was bad, updated so when you set the hinge mount to 50mm its at 50mm *** A few more changes and since I am unable to figure out a proper way to do the tab atm I have uploaded 2 scads for the common blower sizes, Some relationships have been cleaned up. Added stls and lowpoly versions