The date & time on both the Raspberry Pi and the Mac were checked and accurate, so this wasn't the cause.

In the meantime, I've got new developments. Last time I set the gear up, the problem didn't materialize. But then someone else operating a similar mount started to complain because his gear began to slew erratically, just the same way mine did the time before.

So, I disengaged my mount and slewed it around manually a bit, then I locked it back and parked it. I restarted everything and there you go, crazy slews again.

I switched the power off and on again few times and everything returned to normal. At this point I need to perform some more tests to confirm my current theory, but I believe that the mount keeps a kind of state (does an SW EQ6-Pro have such a memory?) that has to be reset at some point.

I'll keep you guys updated...

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