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INDI Library v1.8.0 is Released (27 Jul 2019)

INDI Library v1.8.0 is mostly a maintenance release to fix a few bugs in several drivers.

Internal Guider: Drift Graph Anomoly

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Internal Guider: Drift Graph Anomoly was created by Bill001

Hi,
Yesterday was the first time I had Internal Guider working. During one test guide, the tracking was very good then suddenly I saw the guide trace show the image below. There was no wind.

The guiding corrected approximately just after the image below and continue to guide accurately for about 40 minutes.

What sort of thinks can cause the momentary action? Note guiding was going smooth something like 10 minutes prior, then the anomoly, and then completely normal; staying well withing the green zone of the drift circle graph.

Thanks
Bill
3 months 2 weeks ago #38685
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Replied by maxer on topic Internal Guider: Drift Graph Anomoly

Hi,

Interesting, it looks just like mine except my does that in DE maybe once or twice per session even if the star is perfectly in the box all the time, I always thought I had a lot of backlash but could never find out why that happens.

I don't have a image of it but I do have a GuideData.csv file.

Cs
/Markku

File Attachment:

File Name: GuideData.csv.txt
File Size:9 KB
EQ8, Small scope SW200, Big scope SW300, Xagyl FW, Guidescope Celestron 80mm, SX LodestarX2, SXVR-H9.
RPi3, Ubuntu Mate, and many Arduinos..
Last edit: 3 months 2 weeks ago by maxer. Reason: Edit: Have to be a .txt file.
3 months 2 weeks ago #38689
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Replied by Bill001 on topic Internal Guider: Drift Graph Anomoly

Yes; peculiar. I tested for about 2 hrs, varying exposure, binning, observing. It only did this once that evening got that brief moment.

Learn the hard way I guess/
3 months 2 weeks ago #38690

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Replied by Bill001 on topic Internal Guider: Drift Graph Anomoly

I wonder if the pressure from some cable against the mount/OTA could do that. Go off due to unexpected resistence, work free, and catch up?
3 months 2 weeks ago #38691

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Replied by maxer on topic Internal Guider: Drift Graph Anomoly

It could be the cables but I can't confirm that, I have checked everything a couple of times but no clue why that happens..
EQ8, Small scope SW200, Big scope SW300, Xagyl FW, Guidescope Celestron 80mm, SX LodestarX2, SXVR-H9.
RPi3, Ubuntu Mate, and many Arduinos..
3 months 2 weeks ago #38692

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Replied by ChrisRowland on topic Internal Guider: Drift Graph Anomoly

Looking at your CSV in Excel it's as if the dec corrections were turned off for about 100 seconds. The error and correction size is pretty linear, then it suddenly recovers in about 4 cycles halving each time. It might be interesting to see what the dec drift rate is if the guide corrections are turned off.
3 months 2 weeks ago #38700

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Replied by Bill001 on topic Internal Guider: Drift Graph Anomoly

Do I need to immediately grap the cvs file when i stop the guide, but don’t exit?
How long does cvs data exist in ekos?

I didn’t turn off the guide correction unless you’re refering to some intermittent activity (?)
3 months 2 weeks ago #38701

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Replied by maxer on topic Internal Guider: Drift Graph Anomoly

@ChrisRowland
I can test that and see what happens..

@Bill001
I did grab the file while still guiding so I really don't know if the file is there after a session.

Cs
/Markku
EQ8, Small scope SW200, Big scope SW300, Xagyl FW, Guidescope Celestron 80mm, SX LodestarX2, SXVR-H9.
RPi3, Ubuntu Mate, and many Arduinos..
3 months 2 weeks ago #38721

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Replied by Bill001 on topic Internal Guider: Drift Graph Anomoly

Had the exact thing happen again. A driver pulled in and turned around then leaving. I had nearly the exact same pattern and a moment or so after the driver left it was back to normal. Refection from head lights.

This was odvious. Last time could have been headlights from the hwy that I didn’t notice.
3 months 2 weeks ago #38757

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