INDI Library v1.9.7 Released (29 Jul 2022)

Bi-monthly INDI Library released with new drivers and bug fixes.

Guide calibration fails

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I need to give it a try. I did try a while ago and it didn't work well for some reason.
Max S.

RPI 4 B (4Gb) with SMate
Askar FRA400, TPO RC6, Nikon D5500 full spectrum (with IDAS D1 clip-in filter).
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
iOptron CEM40G
11 months 5 days ago #75414

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Replied by Simon on topic Guide calibration fails

I don't feel like this could be a mechanical problem since I could have a problematic calibration one moment but if I just run it again it would be successful, I don't believe mechanical problems behave that way. In my experience that sounds more like a software or electrical issue. Now that Max mentioned it I noticed in the screenshot I posted that the calibration was indeed going in the opposite direction to when it was successful. When it worked correctly it would start going up to the right but in the failing instance it went down to the left. Could I be having the guide camera in some particularly bad angle where its just on a 90 or 180 degree rotation and wants to flip directions?
I'll see if I can try PHD2 but I'm not sure if it was connecting with my guide cam correctly and I just wanted to avoid it.

Regarding re-calibration I've found that the guiding won't be working quite right if I calibrate to the north and then perhaps slew to the south. I'll redo the calibration and the guiding is great. But I'm still playing around with this. I should mention I always go away somewhere to shoot, I don't have great conditions from my apartment.

NEQ6, WO Z73 + Flat73, ZWO 294MM Pro, ZWO 8x1.25", Omegon 50/200mm, ZWO 120MM-S, Pegasus PPB, Intel NUC + Kstars
11 months 5 days ago #75419

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Well, if you intend to re-use the calibration, you definitely should do that one calibration for declination close to zero (celestial equator) and near the meridian (max. altitude).   The guider then automatically scales the result to whatever location you are pointing at.  This has always worked perfectly for me, both with PHD2 and now with the internal guider.
Calibrating at high declination (north or south) is suboptimal anyhow, because the RA movement of the star is reduced by a factor cos(DEC).  This can easily make the guide star movement drown in noise, unless you use long (and many?) steps....
openSUSE Tumbleweed KStars git INDI git
GPDX+EQMOD, CEM60EC, ASI2600/1600/290mini+EFW+EAF
The following user(s) said Thank You: Simon
11 months 5 days ago #75420

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