.

This is on Kstars 2.8.9.

I looked at the logs. It looks like the slew is happening to the same coordinates over and over again. It's also syncing on those same coordinates. Logfile attached for reference.

I found that I was able to get accurate centering on stars by slewing to them, then using the mount control window to add or subtract the dRa and dDec values (depending on side of meridian I think?) and issue a goto for the updated coordinates manually. This put the star center in the crosshairs. Here's an example:

www.dropbox.com/s/66a1q9ymitque4w/ekos_centering.mov?dl=0

This worked with and without the model in Ekos.

I tested what syncing is doing and found that it doesn't seem to help. Syncing should be unnecessary with a Paramount, and Bisque recommends against it in general save for when initiating a Tpoint calibration. I don't know that it helps beyond what a tpoint model already does when it exists.

Ok I see what you've done there. This could be done in Ekos via differential slewing. However, this can only be done ONE-TIME since there is no way to know if the object is actually centered as the actual vs. telescope coordinates will always differ. This is why SYNC is required. But if for some reason, sync cannot be used, but I guess this could be implemented. Only a single iteration is done in this case after the first "Solve & Slew" is issued.

I _believe_ that TheSkyX uses differential slewing, so this would match that behavior. The behavior it implements is as you suggest - plate solve, one slew and done. I'd have to think about the math, but I'm wondering if there's a way to tighten the centering with an additional slew if you know the offset after the first slew. It may not matter or help. Either way, no sync is necessary since there is a pointing model in place in TSX already.

I noticed that the rotator position can be adjusted by the alignment module as well. I suppose this guiding adjustment will need to take this into account.

Ok, the changes are already in GIT if you want to test that on Linux and can build KStars yourself. Otherwise, wait for the next KStars release.

Very nice. Thank you for the hard work on all of this! When I get ekos running as I suspect it will enable me to spend even more time with my wife. Dinner and drink night is way more fun than hacking away at my rig for hours on end. My first sequences are coming to completion - very exciting. What will we see?

Oh, and I'm happy to build it myself. Is there a page that overviews the details? I'll get right on it.

indilib.org/forum/general/210-howto-buil...st-libindi-ekos.html

Thanks for that. I have it built but I did not run make install so as to not have an untracked package on the system. I'm running it out of the build directory, which may not be a realistic test. So far I see no change in behavior on the Capture & Slew part. It still syncs and doesn't center.

Two questions:

1) Do I need to fully install it to test the update?
2) Do I need to build indi as well? I'm using the latest from the ppa as of today.

No & No. In Align Module, you need to enable differential slewing. See below:

Oops! I can't believe I missed that!

It works! It handles different rotator positions as well. Thank you!

I also added Paramount mount documentation here. If you think anything need to be added/corrected, let me know

indilib.org/devices/telescopes/bisque-paramount.html

Looks like I still have edit access. I can make some updates if needed provided you don't mind.