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It may have damaged some teeth on the drive gear, or a gear is slipping on its shaft. It is easy to have a look, just remove the screws from the side cover,
and remove the cover and visually check out the drive mechanisms. Remove the scope and counterweights and try slewing the mount in both directions at
a fairly high rate so any problem should be more easily detectable.You should be able to see/hear any mechanical problems. The problem could of course be electrical, but is less likely, so I would check the drive system first.
raymo
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