I wonder if the eqmod driver should reject large deltas that are reported from the mount. With the tracking or slew rate being known, a factor could be applied to ignore values outside of a possible range. I have seen jumping too, and went through a period of cable replacement, power supply replacement, etc. Mine doesn't do it often now, but it is very annoying when it does, and can even be dangerous to the mount and equipment when its actual location is different than what kstars shows.

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