Well I've been reading this thread from day one and have enjoyed it greatly, I guess its time I put in my 2 bits worth to keep this going.
If some computer guru could burn the same 2bit grey code onto a pocket CD we could mount two laser diodes to read the bits just as in a typical optical encoder. The CD rom itself would not be used and the disc would move just like an optical encoder but hopefully with more steps.
Even better would be to burn a 16 bit grey code radially and have an absolute encoder.
Steve |