Glad to hear you have it working and Stellarmate has good support if you have any problems in the future. Just need some clear skies now!

Mike

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Hi Ron,
Like Max I have not been happy with reusing calibration due to worse guiding results. I suppose I always thought that the moving of the counterweight to the opposite side changes the backlash characteristics and this might change the guiding. Hence the need to recalibrate.
As I do quite a lot of my imaging without closely supervising the mount, I figure that it is better to be safe than sorry. Doing a recal seems like a small price to pay for peace of mind.
Anyway I will see if this was a one off or something that is repeated once the clouds clear.
Thanks for looking at the logs :)

Mike

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Hi Ron,
Thanks for looking at the log. Your analysis is very valuable.
I have always recalibrated after a flip but have never had this oscillation issue afterwards. I don't want to over-react about this as it has only happened on the one night. I will just monitor the situation once the weather improves and I can get out under clear skies. It may be just a one off issue related to the failed calibration. I was not monitoring the re-calibration in real time but I will when I retest. If it appears to be a persistent issue I will start another thread as it now appears different to Max's problem.
Cheers,

Mike

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Hi Ron,Thanks for the interest. Unfortuanately I did not take any screen shots and the weather has closed in again. I have attached the guiding logs. Everything was fine until the meridian flip which on the logs is line 2145. The guider did a recalibration but at the next dither it takes much longer to complete the dither. The oscillation were in RA mainly. During this period I was making on the fly changes to RA aggression and predictive components. The next few dither had a similar prolonged adjustment period then the settling to normal post dither behaviour coincided with the change to one pulse dither. After which I ran out of time. I dont remember any issues with loss of SNR etc but the guiding log is the only log I have. I will need a bit more time to explore if this behaviour repeats.
Cheers
Mike

File Attachment:

File Name: guide_log-2022-06-11T18-22-08.txt
File Size: 196 KB


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Hey Max,

Guess what. I have just had the crazy oscillations that you reported. The mount was guiding fine up to the meridian flip. The mount flipped as expected then automatically re-aligned, re-focused and re-calibrated the guiding. All this appeared to go OK. The first image was taken then after the first dither the oscillations in RA stated. This eventually responded to reducing aggression in RA in the guiding options and reducing prediction ratio to 0.1 (from 0.5). This settled it down but then after the next dither it started up again so I tried reducing the max adjustment down to 0.1 from the default. This seemed to help but the next dither off it went again albeit less dramatic. Eventually I changed to one pulse dither and this seemed to stop it. Maybe it was unable to reach the set dither after the flip so the one pulse does not have a set target dither amount. I didn't have time to explore if setting all the other changes back to how they were would make a difference but I will try next time. I might leave one pulse dither on from now on though. If your oscillations occur again try just changing to one pulse dither as it seemed to have the greatest effect of all the changes that I made. Out of interest I have also noted that the SEP focus algorithm does not seem to detect any stars so I have reverted to gradient. Have you noticed anything similar?

Cheers

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Hey Max,

I had the mount out last night but did not notice any "crazy" oscillations like you experienced. Very windy but still managed sub arc 0.7 arc sec guiding. The only problems I had were from the failure to park after polar aligning. Pressing "go to home" returned the mount to the park position but I think it seems that one needs to tell EKOS that it is parked by setting the parking in "site management tab" otherwise it cannot calculate and perform an automated flip it seems. So just another thing to remember to do. It would be nice if the mount parked after doing PA though :).
Due to the extraordinary cloudy weather over the last few months this is the first time I have been able to get the mount under the skies. Hope it lasts!

Cheers

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Hey Max,

I might be able to get my scope out tonite as the weather is starting to clear after months of cloudy skies. So I should be able to see if I get the same problem. A few months ago the CEM40 driver was causing connection problems but a change to the V3 driver sorted things. I thought that V3 was the same but go figure :). I'll let you know how it goes.
Cheers
Mike

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Hi
I have the CEM40G and have never seen this behaviour but I have heard that PEC can interefere and can lead to problems. Just check that you have PEC turned off.

Cheers

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Hi John,
If you are starting from scratch I would recommend using Ubuntu rather than Raspian. Ubuntu IMHO is better supported through the repositories (fully up to date) and the new 22.04 version is LTS and very good. If you follow the instructions on the ubuntu section on this website. www.indilib.org/get-indi/download-ubuntu.html

I think that if you want to use Raspian you are better to use Astroberry. You can down load a preconfigured image from the Astroberry site.
Chris Kovacs' You Tube channel contains step by step instructions to install and create profile and use KStars/EKOS/INDI using Ubuntu. Here is the link.
Hope this helps

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Spartacus replied to the topic 'Is INDI ready for Ubuntu 22.04?' in the forum. 4 weeks ago

Just had lots of problems connecting to USB and serial devices due to the brltty.services. This is what finally worked for me (Ubuntu Mate 22.04 on RPi4).
sudo systemctl stop brltty-udev.service
sudo systemctl mask brltty-udev.service
sudo systemctl stop brltty.service
sudo systemctl disable brltty.service
sudo reboot
you can check these service are inactive/dead by doing
sudo systemctl status brltty-udev.service
sudo systemctl status brltty.service
After doing the above I was able to recognise my arduino based devices and other usb devices.

I also found that you need to install linux-modules-extra-raspi to recognise any arduino uno based devices.

Cheers

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Sorry replied too soon. Just updated again and it launches as expected. :)

Thanks

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Unfortunately the original launching issue persists after upgrade. KStars will not start on Ubuntu 22.04

Cheers

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