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INDI Library v2.0.0 Released (01 Feb 2023)

Bi-monthly release with major changes to INDI properties and client API in addition to new drivers and improvements.

Ekos Polar Alignment Assistant (Beta) is here!

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I encountered this. It appears to trace wide arcs and then the pointer jumped 180°. I thought it was cone error preventing me from pointing at NPC, but I recalibrated that and I wasn't that far off.
Using EQMod Driver with Skywatcher HEQ5
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.
5 years 10 months ago #15265
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Supernov that's exactly what happened to me but I did let it finish the movement and noticed the wrong place on kstars. Then I made a second alignment and like you, it worked.

Ihoujin I noticed that jump too. When it reaches very close to polaris it jumps 180°.
(PT) SC@ROS Observatory
TS 6" F4 Newt / Nikon D5500 / 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: 5 years 10 months ago by nMAC.
5 years 10 months ago #15271
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Well, I should have known that slewing uncalibrated mount near the pole might end up in odd discontinuities like this. I will try to test it tonight and see if I can figure out a way to do it properly and safely. If not, I'll disable the auto slew and just advise the user to move the mount closer themselves.
Jasem Mutlaq
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Last edit: 5 years 10 months ago by Jasem Mutlaq.
5 years 10 months ago #15283
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But thing is, I know the NCP was in view I wasn't that far off. And yes I have to test the accuracy in another way but guiding at 0.3" afterwards sort of tells me it was bang on. :)
5 years 10 months ago #15284
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Hi Jasem, first the align model is working very well, I have checked that with PHD2 drift align and I am really closer than I was before.
Also I can make longer exposures without drift. I was guiding with 0.5" (both RA and DEC) and now I am on 0.4" (RA)/0.2"(DEC) so I it's really a big improvement.
The issue is only the first positioning of the mount, If made manually there's no problem. Thank you for this method, it really helps.
(PT) SC@ROS Observatory
TS 6" F4 Newt / Nikon D5500 / 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/
The following user(s) said Thank You: Jasem Mutlaq
Last edit: 5 years 10 months ago by nMAC.
5 years 10 months ago #15286
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I tested the alignment method yesterday. Just a simple remark. When a slowing orientation (west or east) is chosen at first rotation it remained not set at second rotation.
Anyway I didn't had enough time to test the accuracy as the clouds went to ruin the rest of the night.
5 years 10 months ago #15413
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You mean if you select "Auto Mode" then 2nd rotation does not follow first rotation? If that's the case then it is already fixed in GIT.
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
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5 years 10 months ago #15414
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No I mean that if, manually, I choose east direction for first rotation, at the second rotation west is checked instead of east.
Last edit: 5 years 10 months ago by Patrick.
5 years 10 months ago #15415
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Thanks, just committed a fix in GIT for this.
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
5 years 10 months ago #15423
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I still have this strange issue with what appears to be a meridian flip while doing alignment.

Before I did the alignment I slew the mount to EAST a bit more than 90 deg° in RA to be sure to have enough space to do two 15° slews to WEST without meridian flip.

I recorded a session with two alignments, the first worked, it did the 15° deg. west rotations without going to the other side.
The second (to prove the accuracy) was far off and it did? a meridian flip although I started at roughly the same RA as in the first alignment... Maybe I am to stupid and should read "Telescope for dummies" again, especially section meridian flip :silly:

If someone finds a reason why the second alignment did slew to the other side and why the result is so far off from the first one please let me know :)

VIdeo:


Log:

File Attachment:

File Name: log_19-58-07.txt
File Size:640 KB
--= human, without Windows™ =--
pls excuse my bad english! :)
5 years 10 months ago #15708
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Ok, I found out if I dont do the +90° RA rotation at the beginning but instead use 15° west and continue to rotate 15° west everything works fine.
--= human, without Windows™ =--
pls excuse my bad english! :)
5 years 10 months ago #15720
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Also, I noticed from the video when you recheck, you manually go back to the beginning and start again. No need. just start again from where you are, but reverse the direction (i.e. east instead of West), and you're set!
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
5 years 10 months ago #15733
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