Date   

Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Shailesh Trivedi
 

Ray,

Honestly, I have not checked. I will double-check it.

@Greg I will try to image it and attach it here.

@Roland let me see if there is an available slot to screw the CP5 holder.

Shailesh


Re: Too Windy to Go Long?

Dean Jacobsen
 

Here is a link to an annotated version:

https://www.astrobin.com/full/c2dyh3/D/

--
Dean Jacobsen
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/


Too Windy to Go Long?

Dean Jacobsen
 

This is what happens when the weather forecast says it is going to be breezy overnight:

https://www.astrobin.com/full/c2dyh3/C/

The original plan was to image NGC 5033 and NGC 5005 last weekend.  Both would have fit nicely in the field of view of my 1000mm fl f/6 Newtonian.  But the National Weather Service said it was going to be breezy.

Time to execute Plan B.  Packed up the short refractor instead and managed to add IC 4182 to the field.  ... and, you guessed it, no wind.

I will try to get a higher resolution shot of NGC 5033 and NGC 5005 again next year.

Imaged with an ASI2600MC Pro OSC camera + an f/5 530mm focal length refractor.   The camera and optics were expertly carried by the Mach2.  69 x 240 second unguided exposures.

--
Dean Jacobsen
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/


Re: Video on other uses for Astro-Physics Dovetail Saddles & Dovetail Bars

Roland Christen
 


Also trying to decide on 
whether to get the field flattener or the .8X Telecompressor.
This depends on the camera you plan to use. If it is full frame 35mm, the flattener is the best solution. If you have an APS-C format (ZWO 2600), you can use the .8X Telecompressor to produce a wider field than the flattener, with good corner star shapes.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io
Sent: Tue, Apr 26, 2022 12:18 am
Subject: Re: [ap-gto] Video on other uses for Astro-Physics Dovetail Saddles & Dovetail Bars

Great Video Tony! I just got notified about my name being drawn for a 92 Stoaway! Just going through the store picking my mounting plates so I can fit it to my AP900GOTO. Also trying to decide on 
whether to get the field flattener or the .8X Telecompressor. Can't afford both right now. I don't see the DOV DV10 saddle plate on the AP website. Will have to call George tomorrow.
Don
 

--
Roland Christen
Astro-Physics


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Ray Gralak
 

Hi Shailesh,

 

> I redefined my Meridian Limits for my new scope and long imaging train but this does not matter to APPM as it

> does not use the meridian limits (why?)

 

Is the checkbox labeled “Use APCC Meridian Limits” on the "Measurement Points" tab not working? (See screenshot):

 

 

-Ray


Re: Video on other uses for Astro-Physics Dovetail Saddles & Dovetail Bars

Harley Davidson
 

Thank you Don. Congratulations on getting the 92. It's a great scope.

Here is the link for the DOVEDV10:
https://www.astro-physics.com/dovedv10

tony

On 4/26/2022 1:18 AM, Don Anderson via groups.io wrote:

Great Video Tony! I just got notified about my name being drawn for a 92 Stoaway! Just going through the store picking my mounting plates so I can fit it to my AP900GOTO. Also trying to decide on 
whether to get the field flattener or the .8X Telecompressor. Can't afford both right now. I don't see the DOV DV10 saddle plate on the AP website. Will have to call George tomorrow.
Don
 


Re: Video on other uses for Astro-Physics Dovetail Saddles & Dovetail Bars

Don Anderson
 

Great Video Tony! I just got notified about my name being drawn for a 92 Stoaway! Just going through the store picking my mounting plates so I can fit it to my AP900GOTO. Also trying to decide on 
whether to get the field flattener or the .8X Telecompressor. Can't afford both right now. I don't see the DOV DV10 saddle plate on the AP website. Will have to call George tomorrow.
Don
 


Re: [ap-ug] APOD for Ignacio Bibillo

Roland Christen
 

The zoomable one is incredible.

Rolando


-----Original Message-----
From: Bill Long <bill@...>
To: main@ap-ug.groups.io <main@ap-ug.groups.io>
Sent: Mon, Apr 25, 2022 6:41 pm
Subject: Re: [ap-ug] APOD for Ignacio Bibillo

More versions of it on his website too.


The Hubble Palette version is pretty incredible as well, as is the zoomable one. 

Nice job!!

From: main@ap-ug.groups.io <main@ap-ug.groups.io> on behalf of DFisch <manusfisch@...>
Sent: Monday, April 25, 2022 4:37 PM
To: main@ap-ug.groups.io <main@ap-ug.groups.io>
Subject: Re: [ap-ug] APOD for Ignacio Bibillo
 
Ignacio, 
I knew with the James Webb telescope being active that they would have to find a place to park the Hubble I did not realize they had put the Hubble telescope under Pampa skies! Striking image in a great piece of astronomy study congratulations

On Mon, Apr 25, 2022 at 12:22 Stuart <stuart.j.heggie@...> wrote:
--
TJF MOBILE

--
Roland Christen
Astro-Physics


Re: Very oval stars with excellent guiding - how?

M Hambrick
 

Eric's experience with his Quad-TCC raises a good point. What is the best practice for attaching the Quad TCC or any other dovetail attachment (e.g. Doveloc) to the mating dovetail ? I tend to try to locate my Quad TCC in the same position on the filter wheel dovetail every time I attach it. Is doing this creating a "wear spot" where the lock screws are contacting the same spots on the dovetail that over time might result in the parts making less than ideal contact ?

Mike


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Greg McCall
 

I'd be curious to see a picture of the CP5 mounted to the pier bit of the losmandy mount.
Mine is currently in another location so can't get to it at the moment but I made up a spacer, from memory about 20m long, and replaced one of the losmandy pier attachment screws that secure the short pier to the tripod legs, with a longer screw and use that to secure the CP5 supplied bracket.


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Roland Christen
 


Now I plan to relocate my CP5 to be behind the RA axis (on the south side of the pier). Is this a safe spot?
Yes, this is the safest spot, and it's where I locate mine.

Rolando


-----Original Message-----
From: Shailesh Trivedi <shailesh.trivedi@...>
To: main@ap-gto.groups.io
Sent: Mon, Apr 25, 2022 5:27 pm
Subject: Re: [ap-gto] APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Reporting back. Last night I ran APPM with a small model of 32 stars successfully. It was short enough that I stayed there to watch what happens. I think I know why there were motor stalls.

I redefined my Meridian Limits for my new scope and long imaging train but this does not matter to APPM as it does not use the meridian limits (why?)

While running the small model I realized what must have caused motor stalls. For my Mach2, I have bolted the CP5 to the west side of the Losmandy HD tripod and hence when the mount slews the scope to the west side of the pier close to zenith, it comes within approximately 1 inch of the protruding CP5. And this is my theory of why it caused a motor stall when the scope hit the CP5 (ouch).

Now I plan to relocate my CP5 to be behind the RA axis (on the south side of the pier). Is this a safe spot?

Shailesh

--
Roland Christen
Astro-Physics


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Shailesh Trivedi
 

Reporting back. Last night I ran APPM with a small model of 32 stars successfully. It was short enough that I stayed there to watch what happens. I think I know why there were motor stalls.

I redefined my Meridian Limits for my new scope and long imaging train but this does not matter to APPM as it does not use the meridian limits (why?)

While running the small model I realized what must have caused motor stalls. For my Mach2, I have bolted the CP5 to the west side of the Losmandy HD tripod and hence when the mount slews the scope to the west side of the pier close to zenith, it comes within approximately 1 inch of the protruding CP5. And this is my theory of why it caused a motor stall when the scope hit the CP5 (ouch).

Now I plan to relocate my CP5 to be behind the RA axis (on the south side of the pier). Is this a safe spot?

Shailesh


Re: Very oval stars with excellent guiding - how?

Eric Claeys
 

Good news - I did the checks people mentioned and all seemed fine so I pointed the scope straight down, then loosened the three knobs between the Quad-TCC and filter wheel, then tightened them (all three a little, then more, then more). and have round stars again.  And ASTAP shows almost no tilt.

Pointing the scope down allows gravity to make sure the two parts are not tilted relative to one another.  The Quad-TCC and filter wheel interface seems to be the one that gets out of whack when I bump into the camera or it hits something, which is probably what happened.

I also did another polar alignment and am within 1-2 arc minutes.  I will be moving the pier in the observatory so didn't bother trying to get better alignment.  This time I turned off "Tracking corrections" before doing the polar alignment - I have the impression having it on throws off the alignment.  I will do another APPM run.  I had "Tracking corrections" OFF last night since I didn't have a chance to do an APPM run.

Thanks all for the suggestions.


Re: Very oval stars with excellent guiding - how?

Roland Christen
 


The link also has the .fit file and a screenshot from ASTAP's "CCD Inspector" that shows tilt.
I'm not sure what this means.

Roland Christen
Astro-Physics


-----Original Message-----
From: Eric Claeys <AstroEric@...>
To: main@ap-gto.groups.io
Sent: Sun, Apr 24, 2022 1:01 pm
Subject: Re: [ap-gto] Very oval stars with excellent guiding - how?

On Sun, Apr 24, 2022 at 10:59 AM, Roland Christen wrote:
1) are you sure that you were guiding when you took the image?
2) If you did a model but the scope drifted in RA and Dec it appears that you did not activate the model
3) What is your guiding setup? Off-axis or separate guide scope?
4) We may want you to run a simple test on the CP4 to see what software version and internal settings are. Will check with you tomorrow during office hours.
1) Positive guiding was on - the picture of the oval stars was the first one taken in the "guiding On" part of the PHD2 graph.
2) Both "Pointing Corrections" and "Tracking Corrections" were on the whole time.
3) Per the link I sent, the guide chip is built into the filter wheel on the SBIG STXL-16200, so it's off-axis.

The link also has the .fit file and a screenshot from ASTAP's "CCD Inspector" that shows tilt.

--
Roland Christen
Astro-Physics


Re: Very oval stars with excellent guiding - how?

kevinwalsh324@...
 

I echo what M Hambrick and Mike Dodd wrote.

A simple way to check that your imaging train is square is to shoot a few very short exposures at very high gain (or at a very high ISO when using a DSLR or mirrorless camera). The short exposure time means there will be minimal tracking corrections from PHD, but at high gain/high ISO you'll get enough exposure of the sensor to record stars. If the stars are oval after only a short exposure time, the problem would have to be with the imaging train not being square.

Good luck and clear skies.

K Walsh


Re: APPM freeze

legendtrail@...
 

Thanks Ray. I wasn't creating a model, just doing a plate solve and recal, but I'll look next time for a covered popup.


Re: APPM freeze

Ray Gralak
 

For a couple weeks I've had to use task manager to end APPM. Clicking on File, or even the disconnect
scope/camera buttons
causes the program to freeze. The final entry in the log file says a plate solve and recal completed. This is on
1.9.4.3. Everything
else in APCC is running fine. Any ideas?
At the end of an APPM run, a modal text box pops up asking if you want to load the data into APCC. Do you see that popup message? If you didn't see that message, it might have been hidden behind APPM or another window. And, if you don't answer that dialog then APPM will appear frozen, because when a Windows modal dialog is open control is not returned to the main program until the dialog window is closed.

-Ray


APPM freeze

legendtrail@...
 
Edited

For  a couple weeks I've had to use task manager to end APPM. Clicking on File, or even the disconnect scope/camera buttons
causes the program to freeze. The final entry in the log file says a plate solve and recal completed. This is on 1.9.4.3. Everything
else in APCC is running fine. Any ideas?

Info,      PlateSolve, PlateSolveSyncNowWait: Scope Synced: RA=6.36958974056987, Dec=23.1822637865837


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Ray Gralak
 

Shailesh,

So should I do something different?
APCC/APPM cannot cause motor stalls. There are various reasons for a motor stall so give Mike at A-P a call tomorrow unless Mike sees this and posts some suggestions.

-Ray


Re: Very oval stars with excellent guiding - how?

Craig Young
 

If you are using APCC then after a slew wait about 10 seconds then in the AE tab on APCC disable the encoders.  Wait about a minute and then check to see if the stars are round.  If so, then wait a few minutes and turn the encoders back on, wait a few seconds then test again.  Are the stars round or oval?

Craig

4561 - 4580 of 90641