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drift plot assistance...

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drift plot assistance... was created by Gonzothegreat

Now that I have fixed my guiding issue, it 100% due to the loose DEC belt in the CEM25p, what can somebody tell me about this drift plot please?
I am using Ekos defaults guiding values so lots of tuning left to do...
7 months 2 weeks ago #95699
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Replied by Fitchie on topic drift plot assistance...

There may be several reasons, but in any case something is going wrong with the DEC axis.
Can you also post the graph (DEC + correction pulses), which can provide more information about the problem.
7 months 2 weeks ago #95700

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Replied by Gonzothegreat on topic drift plot assistance...



7 months 2 weeks ago #95702
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Replied by Fitchie on topic drift plot assistance...

Please enable the correction pulses also.
And disable RA, number of stars & RMS.
Last edit: 7 months 2 weeks ago by Fitchie.
7 months 2 weeks ago #95703

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Replied by Gonzothegreat on topic drift plot assistance...


thanks, will try your suggestion another evening as I am currently taking mega long exposure frames.
7 months 2 weeks ago #95704

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Replied by Fitchie on topic drift plot assistance...

There are a few possibilities:

- or you have a very large backlash on DEC that plays tricks on you
- or your corrections are much too large
- or you have oscillation (although the DEC drift graph is not regular enough for that)

The graph with correction pulses will provide more clarity about this.


PS: You can check/uncheck the correction check boxes while taking pictures, it will not affect any job.
Last edit: 7 months 2 weeks ago by Fitchie.
7 months 2 weeks ago #95706

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Replied by Gonzothegreat on topic drift plot assistance...

I have added the correction check boxes, if the weather cooperates this evening I'll use some more custom settings other than the defaults one.

7 months 2 weeks ago #95714
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Replied by Gonzothegreat on topic drift plot assistance...

I took that screenshot before ticking the two bottom boxes.
Last edit: 7 months 2 weeks ago by Gonzothegreat.
7 months 2 weeks ago #95715

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Replied by Fitchie on topic drift plot assistance...

I just noticed something:
Is your guiding camera aimed correctly?

Because if it were rotated 90° or 270°, we would obviously misinterpret DEC & RA.
7 months 2 weeks ago #95736

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Replied by Gonzothegreat on topic drift plot assistance...

I have an OAG, does the sensor orientation make a difference?
7 months 2 weeks ago #95742

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Replied by Fitchie on topic drift plot assistance...

No, as long as you don't turn the sensor after calibration, it makes no difference.

But I asked the question with a different intention: I dare to suspect that your problem is on the RA axis, although on the graph the DEC axis appears to be the problem.

That's why I asked if the camera could be turned.
7 months 2 weeks ago #95748

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Replied by Gonzothegreat on topic drift plot assistance...

I won't be able to test it for a few nights as some bad weather is coming...
7 months 2 weeks ago #95757

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