Nautilus gears with involute gearing - customizable by Parkinbot

Last crawled date: 3 years ago

! Updated: added profile shifting - just for fun!
the logarithmic spiral has wonderful features. As it is its own involute it seems to shout at you: gear me please!! There is more or less one dominant design in the internet which is also available here at Thingverse in multiple remixed versions.
As nobody seems to have ever given it a try to put proper involute gearing (instead of sloppy sine gearing) to this beauty I tried to use my "roll a toothed rack along it" method to provide a customizeable version.
See here: https://www.youtube.com/watch?v=NuWnDpQR3q0
Here my first print:
https://www.youtube.com/watch?v=D6c90TbKyuY
Yes, I'm pretty sure I will do a herringbone version in the next days (edit: here it is: http://www.thingiverse.com/thing:773764)
What you get:
a customizable kinetic teaser. Click brackets in and glue them to any surface with gears aligned.
any (reasonable) number of teeth
any modulus
any slope

a structured code with a simple API for easy customizing
What you need:
OpenScad 2015 (dynamic arrays)
ShortCuts.scad library (sorry for that, but it simplifies programming so much). Description in: http://www.thingiverse.com/thing:644830
on ratios larger than about 2.5 a file to draw file the outmost gear for a smoother run
a 8 mm drillbit