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INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

Focusing Question

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  • Thank you received: 6
When I use the focus module I notice a couple of strange things. It could very well be that I don't know how to use it correctly (have some settings wrong).
Usually when the focus is complete the HFR is slightly larger than when it started.
On some occasions during the focusing it will make a big movement which takes it way out of focus. Usually it corrects itself on the next movement but I am wondering why it makes these big movements.

Maybe if someone could point me to some explanation of the what all the settings do that would help me get everything correct.
6 years 4 months ago #20984

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Replied by Jasem Mutlaq on topic Focusing Question

You can limit how much it moves by adjust the Max Travel value. You can select a different algorithm to see if you can get better results.
The following user(s) said Thank You: Eric Vickery
6 years 4 months ago #20989

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Replied by Eric Vickery on topic Focusing Question


Does Max Travel mean the max the focuser can travel each movement or the total it can travel during the entire focusing sequence?

I have tried different algorithms with the same results.

Is there any documentation on how each setting works? Or maybe a video?
6 years 4 months ago #21099

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Replied by Jasem Mutlaq on topic Focusing Question

It's in the code:
if (fabs(targetPosition - initialFocuserAbsPosition) > maxTravelIN->value())

So it checks against current position vs initial position at all times to make sure it is within range.

There is documentation in INDI site, but here is a more up-to-date one: stellarmate.com/support/ekos/focus.html
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6 years 4 months ago #21172

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Replied by Eric Vickery on topic Focusing Question


Your link explained it great. The only issue I have that is not answered in the documentation is why does it make such large adjustments. I will take a look in the code and see if I can understand what is happening.
6 years 4 months ago #21185

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