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INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

Synscan coordinates differ from those of the solver

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I don't have Synscan cable right now because I killed the previous one. The only thing you can do to record a log of the Synscan driver and attach here to have a look. At least I don't have any other idea how to progress further. You can change the logging levels before you connect to the INDI server in Ekos. There is a "Log" button where you can make verbose the logging. Then do a minimal test case with manual syncing on the sky map, stop the INDI and upload the log here.
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Last edit: 5 years 10 months ago by Csaba Kertesz.
5 years 10 months ago #25934

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Had a quick look at the code. In the Sync function, it looks like you're converting the RA/Dec into Alt/Az. In reading the Synscan Serial Communication Protocol PDF, it looks to me like they want RA/Dec for EQ mounts, or Alt/Az for Alt/Az mounts, whereas you're always converting to Alt/Az. That could be the source of the problem.

I don't have my mount setup right now, or I'd make the change and test it out. I won't have it set up until Sunday at the soonest.

-- Kevin
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5 years 10 months ago #25943

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Ok thanks kecsap. I will try this procedure as soon as possible.
:)
Last edit: 5 years 10 months ago by Franck.
5 years 10 months ago #25947

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Thank you for your interest Kevin!
Actually this could explain my problem. Unfortunately I have no idea how to change any part of the software, so the only thing I can do is to wait for your assistance.
The only thing I wonder is how it is possible that this problem occurred only to me.. I mean, if it is a problem of coordinate conversion from AR/DEC to Az-Alt, my problem should be common to every user of stars-ekos that has an equatorial mount...
Anyway, I hope that your inference is the solution to my problem! :)
Thank you again! I'll wait for your checks! ;)

A.
5 years 10 months ago #25949

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Well I think that most people use EQMod instead of Synscan driver. I'm one of the few weird ones that use Synscan instead. I haven't run into the problem myself because I haven't tried using the solver.
5 years 10 months ago #25965

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I tried to do what you suggested me. I hope it is correct.
I attach the log file in this post. Thanks! :)
5 years 10 months ago #25966
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I played with this some over the weekend. I changed the code so it sends RA/Dec instead of Alt/Az. The Dec axis gets updated just fine, but the RA axis wouldn't update. Not sure what's going on. I will have to mess with it some more.
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5 years 10 months ago #26001

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Brilliant!! :o
This sounds considerably good! Thanks for your efforts. I'm curious to see the final result and to finally use the SynScan also with ekos.
I look forward to hearing from you!
Bye! ;)
5 years 10 months ago #26012

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By the way, I hope you guys can keep this driver compatible with the V3 hand controller because I discovered that older HEQ5 mounts cannot upgrade to the V4 version. Thank you for your work on this!
5 years 10 months ago #26014

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The driver is compatible with V3/V4 handsets, just be sure to upgrade the firmware to something recent V3.37+/V4.37+.

Although I don't have a cable I plan to submit a fix for the syncing issues, but I am very busy these days.
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5 years 10 months ago #26015

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I created a fix for this issue (github.com/indilib/indi/pull/598) and it was merged. It will appear tomorrow or after that in the PPA updates.

Disclamer: I don't have a Synscan cable nor an EQ mount. My change _should_ work out of the box, but no guarantee as it was not tested. Please test first carefully, do manual syncs without plate solving and see if +/- RA/DEC coordinates are synced correctly to the handset. And report back the results in any case.
5 years 10 months ago #26063

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Hi kecsap!
Thank you very much for your work. I will test your fix as soon as possible.
5 years 10 months ago #26064

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