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Old 01-08-2012, 05:17 PM
petershah (Peter Shah)
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Join Date: Jun 2012
Location: United Kingdom
Posts: 161
that sounds like it could have too much backlash in the RA, the scope might seem balanced, but it only needs it to be a fraction out to cause a small judder after the mount performs a flip. Unfortunately baclash compensation will not fix this problem, the worm will need adjusting. This is all assuming the oval stars are in the same direction as the RA axis.

Differential flexure can also cause this problem if the scope has settled over time in the east side of the pier after a flip some times the scope need time to settle on the western side

a couple of things to think about
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