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Hi Matthew
Again, speaking of the GPDX / SS2K combo, I went through 3 sets of MT2 motors with various problems, such as twitching and screeching, before Vixen sent me a 4th pair that have been working fine to date (some 10 years ago now).
The twitching manifested as a small jump where the object, initially centred in the FOV, occasionally “jumped” and then returned to centre, the movement caused by the RA motor throwing a wobbly. The initial solution offered by Vixen was to change the RA and DEC Set values in the Motor Parameter menu (Chapter 4 in my manual, under 4.7.3 Telescope Configuration Category).
The default values are RA = Set 1 and DEC = Set 1.
Vixen recommended changing these to RA = Set 3 and DEC = Set 3 and believed that this should fix the twitching. In my case it did not, although some SS2K / GP users said it did.
However, from what you describe, it doesn’t quite sound like the random twitching that I experienced.
Cheers
Dennis
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