Author Topic: INDIClient 1.0.15: New INDIMount Tool  (Read 13022 times)

Offline mschuster

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #15 on: 2016 June 21 13:16:57 »
Quote
OTOH, how does your software the concurrent refocus? Based only on temperature? Or by measuring the PSF? Or any other way?

Temperature only (i.e. an open loop controller). The temperature/focus drift model is good but not perfect. Refocuser runs for one 40 min exposure and then stops. A normal refocus is done between each exposure. So the refocuser starts from a known good point.

A ~2 micron focuser movement happens whenever temperature has changed 0.05°C which occurs on average every 2 minutes. With the Atlas, small movements help reduce lateral image shift (autoguided out) and improve overall tracking accuracy.

Mike
« Last Edit: 2016 June 21 14:01:33 by mschuster »

Offline mschuster

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #16 on: 2016 June 21 14:37:15 »
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Yes, you are right of course that the Temma driver has the 'flip' command. I forgot about that.

No, not a simple flip command, but rather a non-meridian flipping slew.

A normal slew across the meridian will flip a GEM to keep the scope on top. Need a slew where the flip point is the act of crossing any arbitrary local hour angle.

Suppose the flip point is two hours prior to the meridian, the GEM is slewed one hour prior, the scope ends up upside down. Now a small slew is done to target a nearby bright star for focusing purposes, the scope remains upside down (if less than two hours prior). Then a small slew back to the target. The scope remains upside down.

The maximum meridian flipping offset is limited to avoid any chance of crashing. On my setup within two hours is OK.

And to avoid backlash problems, all of these slews need to approach the target from the specified declination direction. This in general may require declination overshoot and backtrack by an amount larger than worst case backlash.

Thanks,
Mike
« Last Edit: 2016 June 21 15:08:21 by mschuster »

Offline chris.bailey

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #17 on: 2016 June 21 14:41:44 »
Quote from: Buzz link=topic=9928.msg62949#msg62949 date=1466534095
Reading the other post, it seems that ASCOM is still required?
[/quote

Not true BUT importantly Indi has the ability to control an EQMod mount. It even works with my Bluetooth EQ dongle (under Windows, OSX and/or Linux).

Chris

ps Having Indi Server running on a Pi has a lot of benefit for low power consumption uses such as star parties. I have done a couple of sessions using other Indi Client software using Indi Server on a PI powered by a small phone charger battery (which happily powers it for 24hours).



Offline Nocturnal

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #18 on: 2016 June 21 14:48:28 »
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Yes, you are right of course that the Temma driver has the 'flip' command. I forgot about that.

No, not a simple flip command, but rather a non-meridian flipping slew.

A normal slew across the meridian will flip a GEM to keep the scope on top. Need a slew where the flip point is the act of crossing any arbitrary local hour angle.

Suppose the flip point is two hours prior to the meridian, the GEM is slewed one hour prior, the scope ends up upside down. Now a small slew is done to target a nearby bright star for focusing purposes, the scope remains upside down (if less than two hours prior). Then a small slew back to the target. The scope remains upside down.

And to avoid backlash problems, all of these slews need to approach the target from the specified declination direction. This in general may require declination overshoot and backtrack by an amount larger than worst case backlash.

Thanks,
Mike

OK, that is useful, thanks. I will read up on how to do this.
Best,

    Sander
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QHY-8 for imaging, IMG0H mono for guiding, video cameras for occulations
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Offline passer_by

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #19 on: 2016 June 22 07:23:52 »
Hi!
Excuse for my English.
Use for GoTo in INDIMount online of catalogues strongly narrows possibilities of application INDIMount on the nature.
Whether there is a possibility to make connected catalogues from a hard disk? UCAC4, UCAC3?
Thanks,
Evgeniy

Offline NKV

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #20 on: 2016 June 22 19:01:14 »
GoTo in INDIMount without internet is very important for me.
I use my equipment in mountains where is no any communication. No mobile, no electricity, and internet.
So, i can't use INDIMount. >:D   

Offline Juan Conejero

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #21 on: 2016 June 23 00:25:56 »
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So, i can't use INDIMount. >:D

Well, you _can_ enter equatorial coordinates manually in the GoTo section  8)

Local catalogs will be available in one of the next versions (probably in September). We are working to implement this functionality as soon as possible.
Juan Conejero
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Offline DrGkill

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #22 on: 2016 June 23 02:14:09 »
The thing missing in other product is the ability to take remote control via a true api.
When you're on the field, every Watt count and then a minimal hardware with a low power consumption remote control (phone or tablet) is a must.
If we could have something like that it would be great.

So :
Daemon without graphical interface (running on a Raspberry or Odroid device, controlling the mount)
A client on Android for remote control. (Or just an API allowing us to develop the client)

Offline Juan Conejero

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #23 on: 2016 June 23 03:17:06 »
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Daemon without graphical interface (running on a Raspberry or Odroid device, controlling the mount)

An INDI server on Raspberry is already a reality.

Quote
A client on Android for remote control.

Well, this clearly excludes PixInsight ;) Seriously, an INDI client with the functionality that we are going to implement in PixInsight is only possible on a desktop or laptop machine. I don't think that power consumption is really a problem nowadays. For example, the next generation of MacBook laptops is impressive in this regard. And PixInsight runs nicely on OS X...
Juan Conejero
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Offline Oleg Astro

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #24 on: 2016 June 23 04:09:23 »
We have the list of INDI clients for Android, Linux and so on.

Offline Juan Conejero

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #25 on: 2016 June 23 04:25:22 »
In the list row for PixInsight, the column "Operating Systems" should be: FreeBSD, Linux, OSX, Windows.

On the other hand, although the PixInsight Core application is proprietary software, the INDIClient module is an open-source project released under a BSD-like license:

https://github.com/PixInsight/PCL/tree/master/src/modules/processes/contrib/kkretzschmar/INDIClient
https://github.com/PixInsight/PCL/blob/master/LICENSE.txt

IMO this is a very important fact that should be mentioned.
Juan Conejero
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Offline DrGkill

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #26 on: 2016 June 23 04:33:53 »
An INDI server on Raspberry is already a reality.

Yes but no descent API out there.

Well, this clearly excludes PixInsight ;) Seriously, an INDI client with the functionality that we are going to implement in PixInsight is only possible on a desktop or laptop machine. I don't think that power consumption is really a problem nowadays. For example, the next generation of MacBook laptops is impressive in this regard. And PixInsight runs nicely on OS X...
The Mac book still consume about 30 to 40W compared to the 2W consumed by an Odroid or a Raspberry, it makes a huge difference.
A Raspberry can be powered during more than 10 hours with a small and light 13AH Li-Ion battery.
Plus the fact the Mac book is very expensive (~$1000-2000) compared to the $30 raspberry. Drive a mount and autoguide doesn't need so much CPU power.
For me bringing a laptop to the field is always a pain in the ass, it's the device consuming 80% of my battery. I really think mount driving and autoguiding could be done much cleverly.

I can't imagine I'm the only one that have had to give up a session because the laptop is gone, and when you live in a city like me and have to do hundreds of kilometer to have a nice sky, an aborted session is more than frustrating.

Offline DrGkill

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #27 on: 2016 June 23 04:34:49 »
We have the list of INDI clients for Android, Linux and so on.

Thanks !
Just need now autoguiding client. Tryed Starspi but it's not stable at all.

Offline Oleg Astro

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #28 on: 2016 June 23 04:38:03 »
In the list row for PixInsight, the column "Operating Systems" should be: FreeBSD, Linux, OSX, Windows.

On the other hand, although the PixInsight Core application is proprietary software, the INDIClient module is an open-source project released under a BSD-like license:

https://github.com/PixInsight/PCL/tree/master/src/modules/processes/contrib/kkretzschmar/INDIClient
https://github.com/PixInsight/PCL/blob/master/LICENSE.txt

IMO this is a very important fact that should be mentioned.
Ok. No problem.

Offline Juan Conejero

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Re: INDIClient 1.0.15: New INDIMount Tool
« Reply #29 on: 2016 June 23 04:49:15 »
Thank you, Oleg!
Juan Conejero
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