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(SOLVED)Meridian Flip fails with EQ6r-Pro and Kstars

  • Posts: 947
  • Thank you received: 288
It's great you could solve this (don't forget to update the title of the thread). Things are easier when the mount doesn't remember stuff from one session to the other! Especially when the drift stretches over several months.

-Eric
HEQ5-Pro - Atik 314E - Orion ED80T - DMK21 on Orion 50mm
DIY 3D-printed Moonlite and FWheel RGB/LPR
KStars and indiserver on two Atom 1.6GHz 1GB RAM Linux, VPN remote access
4 months 15 hours ago #64269

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  • Posts: 226
  • Thank you received: 87
Hi,
Looking at your previous logs:
[2020-12-06T20:57:43.601 CST INFO ][ org.kde.kstars.indi] - EQMod Mount : "[INFO] Starting Goto RA=1.58406 DE=30.768 (current RA=3.82634 DE=26.71) "
[2020-12-06T20:57:43.607 CST INFO ][ org.kde.kstars.indi] - EQMod Mount : "[INFO] GOTO ALign Nearest: delta RA = 2.242304, delta DEC = -4.061214 "
[2020-12-06T20:57:43.608 CST INFO ][ org.kde.kstars.indi] - EQMod Mount : "[INFO] Aligned Eqmod Goto RA=3.82636 DE=26.7068 (target RA=1.58406 DE=30.768) "
[2020-12-06T20:57:43.609 CST INFO ][ org.kde.kstars.indi] - EQMod Mount : "[INFO] Setting Eqmod Goto RA=3.82636 DE=26.7068 (target RA=1.58406 DE=30.768) "
[2020-12-06T20:57:43.610 CST INFO ][ org.kde.kstars.indi] - EQMod Mount : "[INFO] Slewing mount: RA increment = 69, DE increment = -81 "
[2020-12-06T20:57:43.625 CST INFO ][ org.kde.kstars.indi] - EQMod Mount : "[INFO] Slewing to RA: 1:35:03 - DEC: 30:46:05 "
[2020-12-06T20:57:43.893 CST INFO ][ org.kde.kstars.indi] - EQMod Mount : "[INFO] Iterative Goto (1): RA diff = 0.42 arcsecs DE diff = 0.04 arcsecs 
you're misaligned 4 degrees in DEC, but almost 2 hours and half in RA (deltaRA = 2.24). The indi-eqmod driver then considers that this is not a good time to perform a flip: that seems correct because even if your scope points to the meridian, your pier is more than 30 degrees shifted on the west. But how is this possible ? Not 30 degrees, that's not true!
And it is surely not true. I suspect you made a plate solve/sync while pointing near the celestial pole: and 2 pixels near the pole is a lot of RA distance (depending on your setup obviously).
Anyway if you have such RA misalignments, think that meridian flips are shifted the same way. This is not the celestial meridian which is involved to avoid your scope hit the pier, but the "scope meridian".
The following user(s) said Thank You: knro, TallFurryMan
4 months 4 hours ago #64302

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