Just came across this thread. When tracking Jupiter, I see a very regular periodic wobble in RA with an amplitude of about 1/10th of Jupiter's diameter, so (Fall 2022) about 5", and a period of roughly 1.2s (I counted 12 seconds for 10 wobbles). I assume this is the same issue? Is this correctable by firmware, or is this behavior (as seems indicated by an earlier post) baked into the driver chip on the PMC mount controller board?
I just started using this mount (IEXOS-100-2), so I assumed this was due to something I was doing, and maybe caused by bad balancing or some other newbie error, but then I came across this thread. If this (5 arcsecond drive wobble) is inherently not correctable, that would be kind of bad. I mean, it's about a tenth of the diameter of a pretty large planet...