Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

Hi Jochym,
I have had two sessions now with your 0.9 version on my NexStar 6SE Alt/Az with no problems and the tracking seems a little better. I left the scope tracking for over two hours without much deviation.

One thing I have noticed that is a little strange is that on a goto sometimes the scope sets off in one direction and then after about 90 degrees in Azimuth reverses direction going back past the origin to the target. It is not a big deal just a little disconcerting when the scope sets off in the wrong direction initially.

This doesn’t appear to be related to the cable wrap position.

BTW cable wrap works well.

Ken

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

Jochym post=68847 wrote: Are you testing the main branch or the recent development branch (github.com/indilib/indi-3rdparty/pull/348)?

If possible, run the development branch - we have re-worked the tracking code. The old one is going to be replaced anyway - so your testing will be more useful with new code (and it seems to work better in my tests).

Hi Jochym, I have been testing the main branch, I don't know how to get the code from your pull request. Can you advice on how to do it please.

Ken

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

kenkelso post=68844 wrote:

astrogene1000_stuff post=68840 wrote: Good to hear your seeking is resolved.

Question though, in AltAz mode does it ever get to the actual requested position -exactly- ?
I found in EQ mode it would always be hunting in ALT, from a post I did earlier in this thread the ALT rate never went to 0 and the reported DEC never matched exactly the requested and would change over time
09:53:05.081: [INFO] ReadScopeStatus - RA 20.812913 hours DEC -9.423441 degrees
09:53:06.168: [INFO] Tracking - Calculated Alt -15.151356 deg ; Az 156.548387 deg
09:53:06.169: [INFO] Target (AltAz): -15.151356 156.548387 Scope (AltAz) -15.100665 156.304250
09:53:06.169: [INFO] TimerHit - Tracking AltRate -3040 AzRate 14647 ; Pos diff (deg): Alt: -0.052828 Az: 0.240476

Where are you getting this info from?

 

If I do a GoTo in Alt/Az mode and then look at the co-ordinates on the hand controller they match and do not change.

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

astrogene1000_stuff post=68840 wrote: Good to hear your seeking is resolved.

Question though, in AltAz mode does it ever get to the actual requested position -exactly- ?
I found in EQ mode it would always be hunting in ALT, from a post I did earlier in this thread the ALT rate never went to 0 and the reported DEC never matched exactly the requested and would change over time
09:53:05.081: [INFO] ReadScopeStatus - RA 20.812913 hours DEC -9.423441 degrees
09:53:06.168: [INFO] Tracking - Calculated Alt -15.151356 deg ; Az 156.548387 deg
09:53:06.169: [INFO] Target (AltAz): -15.151356 156.548387 Scope (AltAz) -15.100665 156.304250
09:53:06.169: [INFO] TimerHit - Tracking AltRate -3040 AzRate 14647 ; Pos diff (deg): Alt: -0.052828 Az: 0.240476

Where are you getting this info from?
 

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

You were right Astrogene1000, I zeroed the backlash values and now it is OK, thanks you.

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

So as they say ASSUME makes an ass out of u and me.

AstroGene1000 was correct it is backlash settings on the scope that is causing the problem, I zeroed all the backlash settings and now I can't get it to hunt on a goto.

So I think this issue is closed but a note needs to go in the driver details that the backlash settings on the scope can cause this behaviour.

Ken

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

I spoke to soon Jochym, 10 minutes ago I did a normal GoTo and the scope is still hunting up and down.

Could it be something to do with tracking? as it is "slewing with tracking"

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

astrogene1000_stuff post=68801 wrote: Sorry for any confusion. In the Nexstar itself under Menu->Scope Setup->AntiBacklash

My understanding of the AUX driver is that it bypasses anything in the hand controller so the backlash settings wouldn't be relevant.

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

Jochym post=68793 wrote: This is strange. It is supposed to be:
1. Fast GoTo to the position the object *was* at one minute ago
2. Slow GoTo to the final position
This is intended to cancel out any backlash by not changing direction on approach
It should never "hunt around". Are you sure you are not running alignment tool from EKOS in the "slew to target" mode?
 

Yes Jochym I am using "slew to target" mode in the. Ekos alignment tool, I didn't know that was an issue. Normal GoTo's do not have the problem.

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

Where do you set backlash Karma? I can't see anywhere on the Indi Control Panel.

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 10 months ago

I have been testing with NextStar 6SE Alt/Az and everything works BUT after slewing to a target the scope hunts up and down sometimes 10 to 15 times before it settles. This is a problem when plate solving is taking multiple exposures to refine the solve.

Ken

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Ken Kelso replied to the topic 'Celestron Aux driver' in the forum. 11 months ago

Yes no need to align with the hand controller, the driver works but be aware it is still undergoing test and fine tuning and if you want the latest version you will have to compile it yourself. If you do so please report results on the Celestron Aux development thread.

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Ken Kelso replied to the topic 'indi_celestron_aux' in the forum. 11 months ago

Fabrizio wrote: Hi,
I have added some features to the indi_celestron_aux driver.
1. direct mount USB connection.
2. cordwrap position computed by alignment subsystem.
3. autoguide: the code is roughly copied from Rick's driver indi_celestron_cgx.
Unfortunately, I haven't any checking setup, so they compile and run without fatal errors but the functionality is completely untested.
If someone brave and patient wants to try them, the code is here github.com/fabriziop/indi-3rdparty/tree/celestronaux_eqtrack


Hello Fabrizio,

I finally got around to building your latest code and have just spent a couple of hours testing, so far all is good. The cord-wrap works a treat.
I can only test in Alt/Az.

Ken

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Ken Kelso replied to the topic 'Astroberry focuser issue' in the forum. 11 months ago

Excellent

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Ken Kelso replied to the topic 'Astroberry focuser issue' in the forum. 11 months ago

I am using the Astroberry focuser with Nema17 and A4988 driver with no problems, what voltage are you driving the stepper motor with. I use 12V and as mentioned on github have a 100mf capacitor protecting the power line.

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