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27 Feb 2017
INDI development team is happy to announce the release of INDI Library v1.4.0. This new exciting release builds on the maturity of INDI Library and comes with many new supported devices and fixes for existing drivers. Several improvements and enhancements are included in this release including native support for Cygwin and MacOS platforms in addition to Linux, BSD, and Windows (Client only).
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TOPIC: Dome Sync Gateway not producing timely GOTO commands

Dome Sync Gateway not producing timely GOTO commands 2 months 3 weeks ago #14947

This looks straightforward! Thanks! I will get going on it this afternoon!

Scott

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Dome Sync Gateway not producing timely GOTO commands 2 months 3 weeks ago #14965

I forget to say if the telescope is at west of the mount, then you need to put OTA negative.

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Dome Sync Gateway not producing timely GOTO commands 2 months 3 weeks ago #14991

Hello all,

First, to fcasarra: Thanks for the spreadsheet! That I could do easily, and the results were interesting.

Here are the new tests from last night. The high level summary: The values calculated in the spreadsheet are different than those from INDI (Server, ICP, AT, etc), and appear to be even less correct than INDI.

Here is a detailed description:

1) I polar aligned the scope as an absolute positional reference.

2) I shown a flashlight through the polar scope port of my CGEM DX. It's wide illumination filled the port, and illuminated a point on the dome that is presumably within 1 degree of north. No amount of flashlight tipping would move the spot (it isn't a laser, it is a broad; see the attached picture named DefiningNorth). I defined the positioning of the dome to be at 0 degrees when the spot was centered on the shutter.

Attachments:

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Last Edit: by Riprock99.

Dome Sync Gateway not producing timely GOTO commands 2 months 3 weeks ago #14992

Continued from above:

3) Next, I decided to test the dome positioning at two positions that I think simplify the issues. I first put the scope on the East side of the mount dead flat, looking due north (see figure and picture). I believe this will remove any issues of offsets in pier position in the N-S direction. Thus, the only measurement problems I can have are E-W offsets, Up-Down offsets, and OTA length offsets.

In this position, the spreadsheet says the dome should be at 0.2°, INDI places the dome should be at 11°, and I estimate the dome actually needs to be at about 18° to be centered. Though it is hard to see in the picture, about 1/3 of my scope view is occluded by the dome in this position.

The software settings are shown in the attached image. Sorry for the crazy moire patterns. I also include the spreadsheet showing the 0.2° recommended position. Note that I have gzipped the file to allow it to be included here. I added .tar to the name also, to allow it to be uploaded, but it is NOT tar'd. Just rename it to DomeSlitEast.xlsx.gz, then gunzip it, and it should be a regular excel file.

File Attachment:

File Name: DomeSlitEast.xlsx.tar.gz
File Size: 9 KB
Attachments:

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Last Edit: by Riprock99.

Dome Sync Gateway not producing timely GOTO commands 2 months 3 weeks ago #14993

4) Next, I repeated this test in the west. Note I changed the meridian setting in ICP to West. In this position, the scope was not occluded, but only just barely. The spreadsheet thought the angle should be -2.6°, INDI called for 341.8°, and I would estimate that it actually needed to be ~339°. Pictures, and spreadsheet below.

I interpret this to suggest that the the length of the OTA offset needs to be bigger, and the pier offset E-W larger as well.

File Attachment:

File Name: DomeSlitWest.xlsx.tar.gz
File Size: 9 KB
Attachments:

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Dome Sync Gateway not producing timely GOTO commands 2 months 3 weeks ago #14994

5) As measurement 4 made me suspicious of my OTA offset, I include a picture of measuring it. It looks close to 14.5 to 15 inches, or 0.38 m, accounting for the parallax in the image and being on the hypotenuse instead of the desired quantity. See picture below. However, INDI seems to work better if I use 0.5 m. Then the dome rotates far enough in the E and W positions to not occlude the scope. Unfortunately, I have not been able to find and E-W offset that will center it. It seems to want a very big number, like 1m, that makes no sense, and only works on one side of the dome.

So what am I doing wrong?

As always, my sincere thanks,

Scott

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Last Edit: by Riprock99.

Dome Sync Gateway not producing timely GOTO commands 2 months 2 weeks ago #15035

Scott, Do you have a debug log?

It can be useful, because many partial calculations are logged.

Sorry for not been more supportive but I have not many free time this days.

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Dome Sync Gateway not producing timely GOTO commands 2 months 2 weeks ago #15043

Though I promised to record one, I forgot. Fortunately, this behavior is highly repeatable, so I will redo the measurements this weekend, and record a log.

Thanks for your support,

Scott

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Dome Sync Gateway not producing timely GOTO commands 1 month 2 weeks ago #16128

Hello Scott

it took me a while to get Obs. Vermes up and running. I checked the dome slit / mount synchronization and it worked reasonable.

regards, ciao, wildi

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Dome Sync Gateway not producing timely GOTO commands 3 weeks 3 days ago #16478

Finally I had time to take a deep look to Dome Sync and found some bugs in dome position calculation.

I corrected and a new version is available. Also I corrected google Spreadsheed son you can check the results there also.

Regards,
Ferran
The following user(s) said Thank You: knro, Riprock99

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Dome Sync Gateway not producing timely GOTO commands 2 weeks 14 hours ago #16738

Hi Ferran,

I am sorry for not getting you more information sooner. I think my will-power to fight these battles has sagged, but I will do my best to get fired up again. I will redo my test with the new update, and will be sure to record a log.

Thanks for looking at it,

Scott
The following user(s) said Thank You: knro

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Last Edit: by Riprock99. Reason: Misspelled name
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