Kevin Ross replied to the topic 'No longer records filter to FITS header' in the forum. 17 hours 16 minutes ago

Well, now it's happening again. Except now rebooting doesn't fix anything.

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Kevin Ross replied to the topic 'ASTAP help please' in the forum. 1 month ago

Wow, I must be one of the lucky ones. I installed ASTAP and catalogs, ticked the ASTAP checkbox in Ekos, and it has worked (nearly) flawlessly for me ever since, with just default settings and no fussing about.

I'm sure the experts here will get it all sussed for you.

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Kevin Ross replied to the topic 'ASTAP help please' in the forum. 1 month ago

I just tried this out, with my actual telescope, not the simulator. I clicked "Load and Slew", pointed it to a FITS file that I took previously. It solved in a couple seconds, and attempted to slew (nothing happened because I had it parked).

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Kevin Ross replied to the topic 'ASTAP help please' in the forum. 1 month ago

ASTAP in the default configuration will limit itself to a 30 degree search radius. This can be changed in the Ekos options. Does the image have the proper coordinates in the FITS header? I think it uses that as a hint as to where to start searching.

For debugging, try widening the search radius to the maximum.

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Sorry, I just now saw your post.

I use the "sync" feature for that. I just type in a large enough number (usually 5000) and hit "sync" in the focuser INDI control panel. It now things the focuser is at position 5000.

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Kevin Ross replied to the topic 'Always focus from one direction' in the forum. 1 month ago

Very well. That certainly makes it easier for me, since I've already done most of the work in my Waveshare driver. :)

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Kevin Ross replied to the topic 'Moonlite focuser doesn't move with 3.4.3 KStars MacOS' in the forum. 1 month ago

I don't have an easy answer for you, but some tips.

1. You could try different versions of INDI, and compare the debug output logs. Compare a working vs non-working, and note any differences (especially differences in commands sent). That might point to the culprit.
2. If you can build INDI from source, then I would do a "git bisect". It will automate the process of trying different builds, narrowing it down to the one exact code commit that broke things.

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Kevin Ross replied to the topic 'Always focus from one direction' in the forum. 1 month ago

DerPit wrote: But couldn't (shouldn't?) that capability go to the general INDI focuser class, so that <em>any</em> driver can benefit?


Doing it there, rather than in the Ekos UI, is also an option. I hadn't considered that.

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Kevin Ross replied to the topic 'Always focus from one direction' in the forum. 1 month ago

knro wrote: So you can implement this in your driver with Ekos needing to know about it. Once you detect a switch in direction, you perform the large move and then go back to that position again. As far as Ekos is concerned, it's just waiting for you to finish your move.


I've already done that. I was asking if putting this in Ekos as a universal solution was better. :)

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Kevin Ross replied to the topic 'Always focus from one direction' in the forum. 1 month ago

Well actually....

I looked at that picture. 21 iterations to reach focus! Wow. Polynomial works pretty well for me, and usually in 7 or 8 iterations.

I suspect a universal anti-backlash mechanism would be useful, so that it isn't tied to one focus algorithm.

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Kevin Ross replied to the topic 'Always focus from one direction' in the forum. 1 month ago

Excellent! I'm glad I asked before implementing! :)

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Kevin Ross created a new topic ' Always focus from one direction' in the forum. 1 month ago

Hello,

I have recently written an INDI driver for a DIY focuser. One thing I've implemented is the ability to always approach focus from one direction, to eliminate backlash. But it seems to me this is the kind of thing that would be universally applicable to almost all focusers. So do you think it would make sense to implement this in the Ekos focus tab? Some extra options under "mechanics" perhaps?

The current anti-backlash implementation in most focus drivers is a fixed number of steps that get added when changing directions. This requires a lot of trial and error, or careful measurement. The approach I've implemented (which I believe is the same method used in Sequence Generator Pro) is to always approach focus from one direction. For example, if the focus needs to move in, then move in the desired number of steps. If it needs to move out, then move out the desired number of steps, plus some arbitrarily large number of steps, then move in to the desired position.

Does this sound like a good idea, and should it be in Ekos focus module?

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Sweet! Another satisfied customer! :)

Sounds like you might not need the geared stepper.

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Congrats on the progress! :)

For myself, auto selecting a single focus point has never been reliable. I either need to manually select a single point, or use full field mode. Full field mode is the method I use now. You can even tell it to limit itself to the central part of the image, if you prefer.

I use the polynomial focus method. It seems to work well enough. I never tried the linear. I might give that a try. Some people say it works better.

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