´╗┐
×

INDI Library v1.9.6 Released (21 May 2022)

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

polar alignment assistant: total disaster

  • Posts: 137
  • Thank you received: 19
Are you using the guider camera for alignment? And if so, are you doing so because the FOV of your imaging camera is too small? Why not use your image camera?

jmh
3 years 5 months ago #32850

Please Log in or Create an account to join the conversation.

  • Posts: 2097
  • Thank you received: 201
Kstars Mac osx
Odroid C4 / WO Redcat51 / CEM25p / ZWO533MC / QHY5L-II-M (OAG)
3 years 5 months ago #32851

Please Log in or Create an account to join the conversation.

  • Posts: 2097
  • Thank you received: 201
I'm thinking of getting a Polemaster for my HEQ5, with the adaptor. At least this camera will be true to the mount axis.
Kstars Mac osx
Odroid C4 / WO Redcat51 / CEM25p / ZWO533MC / QHY5L-II-M (OAG)
3 years 5 months ago #32889

Please Log in or Create an account to join the conversation.

  • Posts: 268
  • Thank you received: 52
Not entirely. Any camera could be misaligned but the Polemaster is of course going to be potentially less misaligned. The PHD2 tutorials include a method using SPA to adjust the camera to be properly aligned. You could do the same with Ekos when it works. Basically the offset of the centre of rotation from the centre of the sensor consists of a component of Declination and a component of cone error. Adjusting for the declination offset is just a case of moving in Dec. The cone error offset should be easy to correct with a finder guider, less so with an imaging scope.
-- Ken
RPi3 Ubuntu Server 20.04, Windows 10 AMD64, AAEON UP Core Ubuntu Desktop 20.04
Avalon M-Uno, EQ6 Pro, Atik420, ASI1600MM-C, ASI120MM-S, DBK21AU04, ZWO EFW, Optec TCFSi
Vixen R150S, GSO RC8, ST80
3 years 5 months ago #32896

Please Log in or Create an account to join the conversation.

  • Posts: 424
  • Thank you received: 66
It just occurred to me that it may not be electronic. Something could have worked loose since your last successful PA. A friend had similar problems. It turned out to be his mount was not secure. Before you try another PA. Check that everything is solid. In his case he found two issues, one was a loose pinion that the azimuth screws work against, and the other was something wrong with the tripod.
3 years 5 months ago #32900

Please Log in or Create an account to join the conversation.

  • Posts: 2097
  • Thank you received: 201
Thanks, I can guarantee that the mount was/is secure, nothing loose. I always check everything in the box every time I come here.
A lot of good people pointed out the actual guider alignment to the mount itself, as I have taken new measures (see pictures on page 2), I will try it again on the next clear night.
Kstars Mac osx
Odroid C4 / WO Redcat51 / CEM25p / ZWO533MC / QHY5L-II-M (OAG)
3 years 5 months ago #32901

Please Log in or Create an account to join the conversation.

  • Posts: 2097
  • Thank you received: 201
In about two weeks, I will back at the observatory to put the mount back online.
Could someone please tell me if this polar alignment has been solved, still an issue or else?

thanks all.
I will take my backup camera in case...
Kstars Mac osx
Odroid C4 / WO Redcat51 / CEM25p / ZWO533MC / QHY5L-II-M (OAG)
3 years 1 month ago #37018

Please Log in or Create an account to join the conversation.

  • Posts: 1220
  • Thank you received: 212
It worked well for me the last opportunity I had to use it. I use my Orion SSAG through a ZWO 280mm guide scope. Easily achieved >0.4' accuracy, and PHD2 guide logs confirmed that accuracy.
INDI/KStars on Raspberry Pi 4, 4gb
Raspbian Buster with AstroPi3 script configuration
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG/ASI120mm @280mm Guide Scope
PHD2
Waveshare Stepper Motor Board - DIY Focuser
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.
3 years 1 month ago #37024

Please Log in or Create an account to join the conversation.

  • Posts: 465
  • Thank you received: 84
I have used it 4 consecutive nights this week on my portable setup without any problems. Working good.
Used it with an ASI120MM with a 50mm finder.
(PT) SC@ROS Observatory
TS 6" F4 Newtonian / Canon 550D / GPU CC / Datyson T7M / Arduino Moonlite DC Clone- HEQ5 Pro
Orion 120ST / Explore Scientific 80APO / TSAPO102Q Sextuplet / G2-8300FW5 / ES FF 2" / ASI120MM - Arduino Moonlite DC Clone - Vixen GPD2
www.flickr.com/photos/139335144@N03/
Last edit: 3 years 1 month ago by nMAC.
3 years 1 month ago #37063

Please Log in or Create an account to join the conversation.

  • Posts: 1941
  • Thank you received: 416
I have used is several times this week on my two portable setups. On one I use the 80 mm imaging refractor with my Canon DSLR camera and on the other the 203 mm imaging RC telescope with an ASI1600MM-Pro. With the latter I achieved a better than 1' polar alignment last night.
Wouter van Reeven

ASI6200MM and 7 slot 2" filter wheel with a SkyWatcher Esprit 80 ED on a SkyWatcher HEQ5-Pro
ASI1600MM-Pro Cooled and 5 slot 1.25" filter wheel with an 8" TS Ritchey-Chr├ętien on a SkyWatcher EQ6-R
3 years 1 month ago #37065

Please Log in or Create an account to join the conversation.

  • Posts: 2097
  • Thank you received: 201
Thanks all for the good positive comments.
I have arrived at my observatory location a couple of hours ago, after a 9 hours drive and my box is all up and running already. All tested and running, apart from the damn QHY5...( I will put a separate post about this).

The bad news is, I have apparently just 1 single night to do this alignment, and that's tonight !!!! the rest of the week is going to be wet according to the forecast... so... I hope it is going to work...
Kstars Mac osx
Odroid C4 / WO Redcat51 / CEM25p / ZWO533MC / QHY5L-II-M (OAG)
3 years 1 month ago #37447

Please Log in or Create an account to join the conversation.

  • Posts: 47
  • Thank you received: 6
Hi all,
last night I had the chance to finally test Ekos and its polar alignment procedure.
I had problems with it because when moving the mount (iOptron SmartEQ Pro) for the first rotation Ekos parked the mount instead and then stopped.
I had to use the manual slew and then the procedure completed correctly (and quickly, I should say) leaving the mount perfectly aligned.
However, I also experienced a lot of crashes of Kstars/Ekos on my 64-bit Intel miniPC with Ubuntu 18.04: has anybody else experienced the same crash problems?
Thank you.
2 years 9 months ago #42186

Please Log in or Create an account to join the conversation.

Time to create page: 0.624 seconds