Differential drive pan tilt

This is an experiment in building a pan tilt where the motors are fixed. Therefore you dont need slip rings to bring the wiring through.

The bevel gears are designed using https://www.thingiverse.com/thing:1600967

There is an issue with the errors in the STL output from this that can cause problems in the CAD and in 3D printing.

This CAD required the free Designspark Mechanical to use and is provided as is. If you are able to share any fixes/remixes then please do. I no longer have time for this project and don't intend on providing any updates to it.

https://youtu.be/Su6O6155UJM

https://youtu.be/0TMbUoMD7nA

For the bearings I used 4.mm BB gun pellets. Very cheap and worked very well.

On request I have added the code I used to run this. This was written in c# to run on a dotNETMF G120 board from GHIelectronics. The code is far from perfect, but does include fairly decent acceleration control. To achieve the smooth motion on the dotNETMF board, I needed to precalcul