×

INDI Library v1.9.0 Released (23 Apr 2021)

Major INDI Library release v1.9.0 bring significant internal changes championed by @pawel-soja to modernize core INDI Library drivers and clients. New drivers for DeepSkyDad Flat Panel & Pegasus devices plus further improvements to PCM8 drivers.

FCUSB not working

  • Posts: 22
  • Thank you received: 1

Replied by vineyard on topic FCUSB not working

Hi El Corazon (or the OP vtanguay or anyone else reading :) ), do you ever find the FCUSB tries to end up with the focuser trying to keep going in or out (if for examples clouds are in)? If not, how do you stop that from happening. Or is the driver such that if it sees focus is getting worse, it goes one way, and then the other way and so just oscillates around a position. I'm in the UK so clouds can come in and if I'm asleep I don't really want to wake up to burned out motors!

Thank you.
10 months 2 weeks ago #55856

Please Log in or Create an account to join the conversation.

  • Posts: 45
  • Thank you received: 1

Replied by vtanguay on topic FCUSB not working

I've not been successful enough with autofocus in testing to let EKOS do it unsupervised. I will need to keep fiddling with it.
10 months 2 weeks ago #55857

Please Log in or Create an account to join the conversation.

  • Posts: 1112
  • Thank you received: 171

Replied by El Corazon on topic FCUSB not working

I routinely let FCUSB do unsupervised repeated autofocusing during night. You have to tune the parameters to make sure the focus does not deviate too much for it to recover.
Unfortunately, clouds are a huge problem and if they interfere with an autofocus run, focus may get too far out of whack to recover. The principle of all the algorithms is that you have to start out close to good focus, then let the algorithm optimize it. If focus is too far off to start with, the focuser may not know in which direction to move, making matters progressively worse.
Theoretically it should be possible to return to the start point when using a stepper motor, but I am not sure any of the algorithms accommodate that yet. So let's say, the focuser is unable to achieve an HFR <2 it will move the focuser back to the start position (defined by the user after initial focus optimization at the beginning of the evening) and then start over. That would not be possible with an analog focuser driven by FCUSB.
Perhaps Hy can weigh in on options for improving the focus algorithm and perhaps adding a feature as I just laid out?
Atlas Pro AZ-EQ, ASI1600MM-Pro, ASI120MM-S, ES102ED, WO-Z61, Nikon D3300, ASI-EFW, ZWO LRGB,Ha,O3,S2 filter set
The following user(s) said Thank You: vineyard
10 months 2 weeks ago #55871

Please Log in or Create an account to join the conversation.

  • Posts: 22
  • Thank you received: 1

Replied by vineyard on topic FCUSB not working

Thanks El Corazon. Yes I normally get it to focus (based on my eyes) so it should be there or thereabouts for further optimisation.

Have you ever had an instance where the FCUSB ends up trying to take the focuser all the way in or all the way out?

I was wondering whether it might be possible to tweak the code so that if HFR is above a user-set threshold value after more than a user-set number of attempts, the driver just assumes the clouds have come in & stops trying to refocus and leaves it where it is. (That way images may be out of focus but that's erasable whereas if the motors burnt out that's more rpblematic). Sorry I'm not a programmer so I don't know whether that's a stupid or undoable idea.

Thanks again
10 months 2 weeks ago #55903

Please Log in or Create an account to join the conversation.

  • Posts: 1112
  • Thank you received: 171

Replied by El Corazon on topic FCUSB not working

I have not experienced that as yet. It would have to go a long way to max out. The motors won't burn out, if you set the clutch on the drawtube appropriately.
Atlas Pro AZ-EQ, ASI1600MM-Pro, ASI120MM-S, ES102ED, WO-Z61, Nikon D3300, ASI-EFW, ZWO LRGB,Ha,O3,S2 filter set
The following user(s) said Thank You: vineyard
10 months 2 weeks ago #55922

Please Log in or Create an account to join the conversation.

Time to create page: 0.455 seconds