My Inspiration was this whiteboard clock. I like how the machine does can be easily moved between surfaces and how the control is control mechanism is confined to a small part of the machine.
For my mechanism I went on an anlog version using manual levers.
0.2" acrylic. laser cut. assembled.
It's clearly evident that the machine is over constrained and with minimal improvements you can get a better reach
- calculate boundries.
- calculate the translation function from X,Y to alpha,beta coordinates.