Date   

Re: Bad X scale?

 

Thanks Ray, that's a point, but in fact I may not know my image scale exactly. I can get a number from successful plate solves. Maybe that actually is exact enough. The measurement from PEMPro using star trails has a little uncertainty to it.

I understand that a "Bad X scale" is a sanity check for a "successful" plate solve that is most likely wrong.

Right now I'm getting different success rates from the local ANSRV server and the online Astronomy.net version. I haven't yet tried using the online instance for collecting a point model, so that will be my next test. The failed solves that are not "Bad X scale" are all timeouts. I'm attributing that to an under-performing field laptop.

As I see it, the main trade-off between local solves and online solves is the bandwidth and transmission time required to upload the images to the server. In my case it might be offset by the lousy compute performance of my local machine. My net connection from near home will be a cell phone hot spot, and from my desert location it's WiFi to satellite internet (I think).

Does anyone have suggestions that might make the local plate solver more viable on busy fields? I haven't had much luck using settings to reduce the number of objects processed -- in fact it seems to fail more quickly.

Best regards,
Mojo

On 7/12/20 9:49 AM, Ray Gralak wrote:
Thanks Bryan! I think I'll bump my tolerance by a percent and see what happens. :)
Morris, raising the tolerance might be okay if you don't know image scale exactly, but not if the image scale is already known.

When you see "Bad X-scale" that means even though the plate solve was successful, the image scale (and RA/Dec coordinates) were probably wrong. That is, it was a bad solution and should not be included in the model.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of PEMPro V3:  https://www.ccdware.com
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Mojo Jones
Sent: Saturday, July 11, 2020 10:44 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Bad X scale?

Thanks Bryan! I think I'll bump my tolerance by a percent and see what happens. :)


On 7/11/2020 10:17 PM, Worsel via groups.io wrote:


	Mojo

	https://ap-gto.groups.io/g/main/message/71258

	Bryan



--
Morris Jones, Monrovia, CA
BridgeMojo <http://bridgemojo.com>
Old Town Sidewalk Astronomers <http://otastro.org>
Mojo's Blog <http://mojo.whiteoaks.com>







Re: Markarian's Chain - unguided

Joseph Beyer
 

Thanks Rolando

On Sun, Jul 12, 2020 at 11:22 AM uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:
Excellent result!
So many galaxies, billions and billions ...

Rolando



-----Original Message-----
From: Joseph Beyer <jcbeyer2001@...>
To: main@ap-gto.groups.io
Sent: Sun, Jul 12, 2020 12:06 pm
Subject: [ap-gto] Markarian's Chain - unguided

Good morning,

Using my Mach1 and APCC-Pro/APPM I took this image over four nights without guiding.  I used a Takahashi FSQ-106EDX4 and modified Nikon D800e to collect about 7.5 hours of sub images.   The ability to image without guiding is amazing.  Thanks to all the folks at A-P for making such nice instruments!

https://www.astrobin.com/tjqwtm/0/

Joe


Re: Markarian's Chain - unguided

Roland Christen
 

Excellent result!
So many galaxies, billions and billions ...

Rolando



-----Original Message-----
From: Joseph Beyer <jcbeyer2001@...>
To: main@ap-gto.groups.io
Sent: Sun, Jul 12, 2020 12:06 pm
Subject: [ap-gto] Markarian's Chain - unguided

Good morning,

Using my Mach1 and APCC-Pro/APPM I took this image over four nights without guiding.  I used a Takahashi FSQ-106EDX4 and modified Nikon D800e to collect about 7.5 hours of sub images.   The ability to image without guiding is amazing.  Thanks to all the folks at A-P for making such nice instruments!

https://www.astrobin.com/tjqwtm/0/

Joe


Re: Markarian's Chain - unguided

Joseph Beyer
 

Thanks very much Stuart.  

On Sun, Jul 12, 2020 at 10:07 AM Stuart <stuart.j.heggie@...> wrote:
What a great shot Joseph!!!


On Sun, 12 Jul 2020 at 13:06, Joseph Beyer <jcbeyer2001@...> wrote:
Good morning,

Using my Mach1 and APCC-Pro/APPM I took this image over four nights without guiding.  I used a Takahashi FSQ-106EDX4 and modified Nikon D800e to collect about 7.5 hours of sub images.   The ability to image without guiding is amazing.  Thanks to all the folks at A-P for making such nice instruments!

https://www.astrobin.com/tjqwtm/0/

Joe


--

Stuart
http://www.astrofoto.ca/stuartheggie/


Re: Markarian's Chain - unguided

Stuart <stuart.j.heggie@...>
 

What a great shot Joseph!!!


On Sun, 12 Jul 2020 at 13:06, Joseph Beyer <jcbeyer2001@...> wrote:
Good morning,

Using my Mach1 and APCC-Pro/APPM I took this image over four nights without guiding.  I used a Takahashi FSQ-106EDX4 and modified Nikon D800e to collect about 7.5 hours of sub images.   The ability to image without guiding is amazing.  Thanks to all the folks at A-P for making such nice instruments!

https://www.astrobin.com/tjqwtm/0/

Joe


--

Stuart
http://www.astrofoto.ca/stuartheggie/


Markarian's Chain - unguided

Joseph Beyer
 

Good morning,

Using my Mach1 and APCC-Pro/APPM I took this image over four nights without guiding.  I used a Takahashi FSQ-106EDX4 and modified Nikon D800e to collect about 7.5 hours of sub images.   The ability to image without guiding is amazing.  Thanks to all the folks at A-P for making such nice instruments!

https://www.astrobin.com/tjqwtm/0/

Joe


Re: Bad X scale?

Ray Gralak
 

Thanks Bryan! I think I'll bump my tolerance by a percent and see what happens. :)
Morris, raising the tolerance might be okay if you don't know image scale exactly, but not if the image scale is already known.

When you see "Bad X-scale" that means even though the plate solve was successful, the image scale (and RA/Dec coordinates) were probably wrong. That is, it was a bad solution and should not be included in the model.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of PEMPro V3: https://www.ccdware.com
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Mojo Jones
Sent: Saturday, July 11, 2020 10:44 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Bad X scale?

Thanks Bryan! I think I'll bump my tolerance by a percent and see what happens. :)


On 7/11/2020 10:17 PM, Worsel via groups.io wrote:


Mojo

https://ap-gto.groups.io/g/main/message/71258

Bryan



--
Morris Jones, Monrovia, CA
BridgeMojo <http://bridgemojo.com>
Old Town Sidewalk Astronomers <http://otastro.org>
Mojo's Blog <http://mojo.whiteoaks.com>


Re: Messier 8: TEC160FL + A-P QUADTCC-TEC160 n+ Mach2Gto Modeling

jypeng@...
 

Terri, Eckhard.
I am glad to hear your comments it.
Thank you.
Jian Yuan Peng


Re: Some open cluster goodness.

Dean Jacobsen
 


Re: Bad X scale?

 

Thanks Bryan! I think I'll bump my tolerance by a percent and see what happens. :)

On 7/11/2020 10:17 PM, Worsel via groups.io wrote:
Mojo

https://ap-gto.groups.io/g/main/message/71258

Bryan



Re: Bad X scale?

Worsel
 


Bad X scale?

 

After having good luck with APPM, the Mach1, and the Traveler, I've moved on this week to trying it with the 1100GTO and AP180.

The longer focal length and long moment arms certainly make it less forgiving.

I'm doing a small point map of 23 points. I'm accustomed to them all succeeding with the Mach1/Traveler.

This is my second night to make a point map with the AP180/1100GTO, and two plates failed with a timeout. I'm wondering if these might be explained by being dense Milky Way points, while trying to solve on a somewhat slow and old PC. I'm using the ANSRV local astronomy.net solver.

But two other points didn't exactly "fail," that is, they weren't logged as having failed by APPM. But they did record "Bad X Scale" in the point log, and left yellow in the point diagram, and had no RA/Dec deltas.

I'm still getting pretty good results with pointing and tracking.

Mojo


Re: Mach1 and GTOCP4 Yellow Light

Mikko Viljamaa
 

No lose wires that I can see.


- Mikko


Re: Mach1 and GTOCP4 Yellow Light

Mikko Viljamaa
 

OK, plugged the RA to Dec (cannot plug Dec to RA as it’s too short) and nothing happens. When I open the gearbox cover I see the gears turning about 180 degrees and that’s all.


Mikko


Re: Messier 8: TEC160FL + A-P QUADTCC-TEC160 n+ Mach2Gto Modeling

Terri Zittritsch
 

That is really beautiful Jian Yuan. 


Re: Some open cluster goodness.

Terri Zittritsch
 

Great shot Dean. 


T


Re: Mach1 and GTOCP4 Yellow Light

Roland Christen
 

try what we suggested - plug the RA cable into the Dec motor.

Rolando



-----Original Message-----
From: Mikko Viljamaa <mikko.viljamaa@...>
To: main@ap-gto.groups.io
Sent: Sat, Jul 11, 2020 6:14 am
Subject: Re: [ap-gto] Mach1 and GTOCP4 Yellow Light

I already tried the second Y cable which I ordered. I can’t believe the cable is the issue unless the brand new Y cable is faulty also. 

- Mikko


Re: Mach1 and GTOCP4 Yellow Light

Mikko Viljamaa
 

I already tried the second Y cable which I ordered. I can’t believe the cable is the issue unless the brand new Y cable is faulty also. 


- Mikko


Re: Mach1 and GTOCP4 Yellow Light

Roland Christen
 

You have a bad connection to the motor encoder. Could be in the Y cable, could be inside the gearbox, could be a loose wire or broken wire on one of the connectors on the RA part of the cable.

 First thing I would do is to connect the RA cable to the Dec gearbox and see if it acts the same way. If so, then the fault is in the cable. If the Dec does not run away using the RA cable, but the RA does, then the fault would be inside the gearbox.

If all else fails and you can't figure anything out then call AP support tomorrow and they will help you do some tests.

Rolando



-----Original Message-----
From: Mikko Viljamaa <mikko.viljamaa@...>
To: main@ap-gto.groups.io
Sent: Fri, Jul 10, 2020 10:24 pm
Subject: Re: [ap-gto] Mach1 and GTOCP4 Yellow Light

Well I changed the power unit first yesterday and that didn’t help. Neither did the power cord and actually at this point the mount even refused to connect. So I had not high hopes when I changed the Y cable but miracles happen and with the new Y cable everything worked fine last night. 
This until an hour ago when I tried to start a sequence again only to run into the same problem again. When the mount is connected, the RA axes immediately slews about 20 degrees after which it stops and the yellow light is on. 
If I try to open the RA gearbox tomorrow, what exactly should I look for?


- Mikko


Re: Mach1 and GTOCP4 Yellow Light

Christopher Erickson
 

Swap the two Y-cable motor connectors on the motors with each other and see if the problem switches to the DEC motor. Then report back.

Virus-free. www.avg.com


On Fri, Jul 10, 2020 at 5:49 PM Mikko Viljamaa <mikko.viljamaa@...> wrote:

Yes previously the slew took longer and was more random. So long that a couple of times I had to cut the power so that the scope won’t hit the tripod. No encoders in Mach1, not at least in mine.

If by a connector you mean the Y cable I already tried another cable. I’m not sure how I could check the connector itself.

Thanks,

Mikko

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