Quote:
Originally Posted by billdan
Another advantage of using encoders, is if you loosened your RA/Dec clutches and e.g manually followed the space station. The Goto Model in the system would be constantly updated and remove the need to recalibrate your star alignment.
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A homing switch can also be used for that purpose. After the mount finds the home switch pointing is restored and it's as if nothing ever happened. But it does require the mount to find the home switch which can take a minute for it to do.
Another advantage of the absolute encoders is that there is never any ambiguity concerning the physical position of each axis, thus no parking position restrictions. A homing switch won't do
that for you.