I saw this issue yesterday with Patrick as we tried the new Ekos Polar Alignment Assistant tool that uses West/East command to move the mount.

So the RA would increases if we slew EAST, and decrease if we slew WEST.

East --> RA+
West --> RA-

This is the expected behavior. However, iOptron CEM60 (and anything based on the ieq driver) behaves the exact opposite of this. Is there some explanation for this?

Odd. The CEM25 works fine in all aspects, except when I use the legacy Polar Alignment tool. I found the instructions given by EKOS to be reversed when it comes to calculating the ALT error (which is done using East/West stars). If EKOS told me the mount was too high, I had to increase its angle even more to get it aligned.

Peter

How about when you issue motion West/East command via the INDI or mount control panel, what happens to the RA reading?

Good question, I have never tried. I've only used KSTARS and allowed EKOS to move the mount from the Alignment module.

Peter

Just came back to this issue with iOptron mounts.
My new CEM120 rotates clockwise when I slew West.
West +RA
East -RA

Well I did some test with my iOptron CEM60. Seems to behave as expected:
West Slew: ClockWise and RA -
Easr Slew: Anti ClockWise and RA+

And shown correctly on the Kstars map.

Also did a polar alignment (with the CCD simulator) and got no error. Took 3 images, solved slewed and got to the screen showing the error.

This was for Nothern Hemisphere. (Opposite for Southern Hemisphere? Could not test that, the driver did not want to set location to Canberry, although it was set in Kstars to update mount with time and location)

Paul