The high resolution encoders that will help Dec and correct backlash can not be interpolated encoders - they won't work to see and correct backlash. Interpolating encoders only work on RA because it is constantly moving, tracking at a nearly constant rate that allows interpolation to work. A 1 million tick encoder has 1.3 arc-sec resolution, so it would never get closer than the last 1.3 arc-sec. Only the Servo II can operate with mount encoders of this number tick/rev and higher - the Servo I can't read that many tics.
Hi Don, the intended ring encoder has 15744 lines x800 = 12,6 M tick/rev. (RESM20 100mm dia + VIONIC 25nm). I have the Servo II. But no chance working due to interpolation?
