Date   

Re: Does APCC 1.8.0.2 update disable encoders?

Cheng-Yang Tan
 

Hi Ray
  I've tested 1.8.0.4 this morning and it works. AE tab values all filled in correctly.

 FYI, when I clicked on the update button on 1.8.0.2, it said there were no updates. Instead, I just downloaded the update via your link and installed it.

cytan

On Sunday, March 8, 2020, 08:55:06 AM CDT, Ray Gralak <groups3@...> wrote:


> Yes, mine is also off when I startup.  But also, I noticed both yours and mine show the home positions as -100H
> (HA) and -100 degrees (DEC).  Does that mean the AE function needs to be initialized or calibrated?  Also, seems
> like those numbers are a bit extreme and should be limit checked in the software to something like +/- 6 hours for
> HA and 0 degrees for DEC.

Those are the default uninitialized values which just weren't getting updated. The new builds, 1.8.0.4 and .5, fix this.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
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 Craig Young
> Sent: Saturday, March 7, 2020 1:45 AM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] Does APCC 1.8.0.2 update disable encoders?
>
> Yes, mine is also off when I startup.  But also, I noticed both yours and mine show the home positions as -100H
> (HA) and -100 degrees (DEC).  Does that mean the AE function needs to be initialized or calibrated?  Also, seems
> like those numbers are a bit extreme and should be limit checked in the software to something like +/- 6 hours for
> HA and 0 degrees for DEC.
>
> Craig
>





Re: Notified!😍 #mach2gto #Mach2GTO

Ray Gralak
 

Ok, thanks Ray. I understand the APPM benefit but didn't think it was for those of us using the mount in a
portable fashion. So I have some questions into George on results.
You can always start APPM after twilight before it gets dark enough to image.

Depending on your camera download time and plate solve time you should be able to get 2-3 points per minute. Thus, 50 points easily in 30 minutes (25 points per side).

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
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 Terri Zittritsch
Sent: Sunday, March 8, 2020 10:00 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Notified!😍 #mach2gto #mach2gto

Ok, thanks Ray. I understand the APPM benefit but didn't think it was for those of us using the mount in a
portable fashion. So I have some questions into George on results.


Terri


Re: Notified!😍 #mach2gto #Mach2GTO

Terri Zittritsch
 

Ok, thanks Ray.    I understand the APPM benefit but didn't think it was for those of us using the mount in a portable fashion.    So I have some questions into George on results.


Terri


Re: Notified!😍 #mach2gto #Mach2GTO

Ray Gralak
 

Hi Ray, thank you for your very fast responses. So if I might ask another follow-on: If I install APCC, and call
the telescope from either CDC or SGPro, does it call APCC then versus the V2 driver directly?
No, ASCOM clients always call the AP V2 driver, which can start APCC if it is not already started, then the driver connects to APCC.

Your comment about RA rate correction intrigues me. I didn't realize I needed APCC to be running to get good results.
Just running APCC Pro initially won't make a difference in pointing and tracking rate performance. You will need to run APPM to gather data points throughout the sky via plate solving. Once the data points have been accumulated APCC can create a pointing and tracking rate model. Then you will see improvements in tracking and pointing. How much improvement depends on the repeatability and how well the pointing model terms model the telescope and camera setup that you are using.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
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 Terri Zittritsch
Sent: Sunday, March 8, 2020 9:24 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Notified!😍 #mach2gto #mach2gto

Hi Ray, thank you for your very fast responses. So if I might ask another follow-on: If I install APCC, and call
the telescope from either CDC or SGPro, does it call APCC then versus the V2 driver directly? Your comment
about RA rate correction intrigues me. I didn't realize I needed APCC to be running to get good results. I've kept
my logs from last night, but it wasn't entirely what I expected. I polar aligned as close as I ever do with polemaster,
and put the PHD2 settings so I wouldn't chase-the-seeing as they say. I did turn off guiding at one point and ran
the phd tool to evaluate drift. There was more than I expected on RA. Is this because I'm not running APCC?
Here is where my lack of experience with AP products fails me.
Maybe I need to bite the bullet and install APCC.

T


Re: Notified!😍 #mach2gto #Mach2GTO

Terri Zittritsch
 

Hi Ray, thank you for your very fast responses.    So if I might ask another follow-on:   If I install APCC, and call the telescope from either CDC or SGPro, does it call APCC then versus the V2 driver directly?    Your comment about RA rate correction intrigues me.  I didn't realize I needed APCC to be running to get good results.   I've kept my logs from last night, but it wasn't entirely what I expected.   I polar aligned as close as I ever do with polemaster, and put the PHD2 settings so I wouldn't chase-the-seeing as they say.  I did turn off guiding at one point and ran the phd tool to evaluate drift.  There was more than I expected on RA.   Is this because I'm not running APCC?     Here is where my lack of experience with AP products fails me.   
Maybe I need to bite the bullet and install APCC.

T


Keypad Upgrade for Using Mach2

Dean Jacobsen
 

Reading the recent posts about new Mach2 owners and the APCC software has me wondering how things are going with the hand paddle software upgrade.

My plan is to use the new Mach2 like I have been doing with the 900 --> use the hand paddle for mount initialization (and other things also) and then connect The Sky X, Sequence Generator Pro and PHD2 to the mount using the AP ASCOM driver.

Then I can slowly incorporate the features of APCC into the process.

Regards,

Dean Jacobsen
Web site: http://astrophoto.net/wp/
Astrobin: https://www.astrobin.com/users/deanjacobsen/


Re: Notified

Terri Zittritsch
 

You use the threaded adapter that is made for the AP900 mount.   

Terri


Re: Notified

Ray Gralak
 

Ray, do you suggest I try re-installing the 5.30.8 driver and give it another try. Should I do an uninstall first, or
just install over the top?
There is no need to uninstall first. You can install over the top either going to a newer or older version of the driver.

The same is true for APCC. You don't need to uninstall first when installing a newer or older version of APCC.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
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 Terri Zittritsch
Sent: Sunday, March 8, 2020 7:56 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Notified

Ray, do you suggest I try re-installing the 5.30.8 driver and give it another try. Should I do an uninstall first, or
just install over the top?

best,
Terri


Re: Notified!😍 #mach2gto #Mach2GTO

Ray Gralak
 

Terri,

One question I did have. Is on the installation of APCC after I've already installed the V2 driver. It seems the V2
driver com port get updated to a virtual port, is this because the APCC program now gets the 'real port', e.g. from an
hardware RS232 connection, and then the the virtual ports are used to communicate between the V2, APCC, and
APCC to other programs and all communications back to the computer flow through APCC?
Yes, that is correct. APCC directly connects to the mount via serial port, USB, or a network. All "traffic" from the driver is routed back and forth through APCC's virtual ports. APCC by default will automatically reconfigure the AP V2 driver to use one of APCC's ports so you won't need to reconfigure the driver.

ASCOM clients will not be aware (nor do they need to be aware) of APCC so you can/should always use APCC. If you are using APCC Pro this allows pointing correction, and more importantly, tracking rate correction. ASCOM client applications like Cartes du Ciel won't even know APCC is being used.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
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 Terri Zittritsch
Sent: Sunday, March 8, 2020 7:52 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Notified!😍 #mach2gto #mach2gto

Hi Ray, I did find this.. and have read some of the setup information. It wasn't a poke, it was just me articulating
(maybe poorly) that I need to educate myself and figure out what I can make use of for a portable setup. But first I
need to get familiar with the rest of the mount.. and the V2 driver.

One question I did have. Is on the installation of APCC after I've already installed the V2 driver. It seems the V2
driver com port get updated to a virtual port, is this because the APCC program now gets the 'real port', e.g. from an
hardware RS232 connection, and then the the virtual ports are used to communicate between the V2, APCC, and
APCC to other programs and all communications back to the computer flow through APCC? Just trying to
understand what I'm doing when I install the APCC. And then once APCC is installed, does the V2 driver port
need to be changed if I start something like Cartes du Ciel and connect the telescope which will not use APCC?
If there is a better way to ask such things, please point me. Probably should create a new thread at a minimum..


Terri



Terri


Re: Notified

Terri Zittritsch
 

Hi Wayne, thanks
You will enjoy the polemaster.    I used mine last night.   You can use it as soon as the lowest gain settings allow you to see polaris and at least one of the surrounding stars that it uses.   I've seen the AP RAPAS  finder view which seems very similar, although much finer detailed, than an 80's 2080 LX5 polar scope I had. It came with a paper wheel which decoded where to find polaris on the finder.    I always liked that, not sure why they discontinued it on newer models.    If I didn't already have a polemaster I'd probably have purchased the RAPAS.

Thanks on the daytime polar alignment.   I'll have to see if it'll work good enough for solar imaging.. On my atlas, the only way for me to do this was to mark places on my drive, after getting good polar align in the evening,  that I could bring the mount back to during the day.    I use those little 3-wheel dollies to move the whole setup around.

T


Re: Notified

DFisch
 

Wayne, how are you attaching your pole master to the Mach2

TJF 📱

On Sun, Mar 8, 2020, 10:42 Wayne Hixson via Groups.Io <wayneh9026=yahoo.com@groups.io> wrote:

Good morning Terri!

Good idea on sharing. My email is wayneh9026@....


I did refresh to the new ASCOM version but didn’t run into that issue. I’m not familiar with CDC.  


With respect to support, there are a couple ways. The AP guys do a good job of monitoring the forum and other users often can help too. This often works during off hours. You can also call AP directly and get help during their working hours. Ray Gralak is the author of both APCC and the ASCOM driver and also frequents this forum. I see he’s on this morning.

The Daytime Polar Alignment is great and especially easy with the Mach 2. Don’t need APCC, can even do it with the keypad once we have those. Roughly point the mount north. Go to Park 5 and with a carpenter’s level on the scope, use the Altitude adjustment to bring the scope to level. Do a goto a bright object (Sun, moon, bright star or planet. With a wide field eyepiece or camera, adjust the azimuth to bring the object to as close as possible to the center of the FoV. That generally gets you close to be able to goto objects and refine PA later using other techniques. 


A couple tips I’ve found useful. Start with the azimuth adjuster centered. With the Eagle pier, I also center the mount attachment knobs in the attachment slots on the pier. For initial adjustment, loosen those knobs and rotate the the mount on the pier to center the object. Save the azimuth adjuster for fine adjustment. Also make sure you start with the telescope in focus, or you know where focus is! It’s hard to spot a bright star or planet in the daytime when you’re having to play with the focus. Trust me I’ve been there! I did this routine last night with the Moon, which was hiding and emerging from clouds and got what I think is a pretty good start. 

 



I’m hoping it will clear up enough to try my Polemaster tonight, which is also new to me. 

Clear skies!

Wayne


Re: Notified

Terri Zittritsch
 

Ray, do you suggest I try re-installing the 5.30.8 driver and give it another try.    Should I do an uninstall first, or just install over the top?    

best,
Terri


Re: Notified!😍 #mach2gto #Mach2GTO

Terri Zittritsch
 

Hi Ray, I did find this.. and have read some of the setup information.  It wasn't a poke, it was just me articulating (maybe poorly) that I need to educate myself and figure out what I can make use of for a portable setup.   But first I need to get familiar with the rest of the mount.. and the V2 driver.   

One question I did have.  Is on the installation of APCC after I've already installed the V2 driver.    It seems the V2 driver com port get updated to a virtual port, is this because the APCC program now gets the 'real port', e.g. from an hardware RS232 connection, and then the the virtual ports are used to communicate between the V2, APCC, and APCC to other programs and all communications back to the computer flow through APCC?     Just trying to understand what I'm doing when I install the APCC.    And then once APCC is installed, does the V2 driver port need to be changed if I start something like Cartes du Ciel and connect the telescope which will not use APCC?       If there is a better way to ask such things, please point me.   Probably should create a new thread at a minimum..


Terri



Terri


Re: Notified

Ray Gralak
 

Hi Terri,

At this point, not sure if this was an issue with the 5.30.8, or even the way I updated the driver (which was error
free). I'll stick with 5.30.7 for now until I get some clarification. I also need to figure out how to report such things
formally. I'm sure a totally new mount will have a few glitches.
I'm absolutely sure whatever issue you saw with had nothing to do with the 5.30.08 driver. The only change was to add the missing custom slew rate option.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
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 Terri Zittritsch
Sent: Sunday, March 8, 2020 5:40 AM
To: main@ap-gto.groups.io
Subject: [ap-gto] Notified

Hi Wayne, you are free to e-mail me directly as well, I'm @Theresamarie1. Might be good to compare
notes. I haven't figured out how to do a polar alignment during the day yet. Is that a feature of APCC?

Also curious if you installed the 5.30.08 V2 driver? I did my day one testing with 5.30.7 which went fine and
yesterday installed 5.30.8. I saw some strange behavior where Cartes du Ciel thought the mount pointing
around Deneb when it was clearly pointing at the pole. The V2 driver coordinates were consistent with where it
was pointing in cartes du ciel, but the mount was in a park 3 orientation (pointing at pole). I did various resets,
restarts to no avail, the driver coordinates would not align to where the mount was pointing. So I uninstalled the
5.30.8 and reinstalled the 5.30.7, which did nothing. But given some of my experience with ascom and how it
may store things, I went to the telescope selection screen in cartes du ciel and selected EQmod (to presumably
force a refresh of wherever ascom puts the code) then then re-loaded the V2 driver and this seemed to do the trick
and all was back to normal.

At this point, not sure if this was an issue with the 5.30.8, or even the way I updated the driver (which was error
free). I'll stick with 5.30.7 for now until I get some clarification. I also need to figure out how to report such things
formally. I'm sure a totally new mount will have a few glitches.

best,
Terri


Re: Notified

Wayne Hixson
 

Good morning Terri!

Good idea on sharing. My email is wayneh9026@....


I did refresh to the new ASCOM version but didn’t run into that issue. I’m not familiar with CDC.  


With respect to support, there are a couple ways. The AP guys do a good job of monitoring the forum and other users often can help too. This often works during off hours. You can also call AP directly and get help during their working hours. Ray Gralak is the author of both APCC and the ASCOM driver and also frequents this forum. I see he’s on this morning.

The Daytime Polar Alignment is great and especially easy with the Mach 2. Don’t need APCC, can even do it with the keypad once we have those. Roughly point the mount north. Go to Park 5 and with a carpenter’s level on the scope, use the Altitude adjustment to bring the scope to level. Do a goto a bright object (Sun, moon, bright star or planet. With a wide field eyepiece or camera, adjust the azimuth to bring the object to as close as possible to the center of the FoV. That generally gets you close to be able to goto objects and refine PA later using other techniques. 


A couple tips I’ve found useful. Start with the azimuth adjuster centered. With the Eagle pier, I also center the mount attachment knobs in the attachment slots on the pier. For initial adjustment, loosen those knobs and rotate the the mount on the pier to center the object. Save the azimuth adjuster for fine adjustment. Also make sure you start with the telescope in focus, or you know where focus is! It’s hard to spot a bright star or planet in the daytime when you’re having to play with the focus. Trust me I’ve been there! I did this routine last night with the Moon, which was hiding and emerging from clouds and got what I think is a pretty good start. 

 



I’m hoping it will clear up enough to try my Polemaster tonight, which is also new to me. 

Clear skies!

Wayne


APCC Standard 1.8.0.4 and APCC Pro 1.8.0.5 Pro

Ray Gralak
 

Hi everyone,

There have been a few issues reported within the last couple days in APCC having to do with the encoder status and the missing option for setting a custom slew rate. All of the reported issues should be fixed in the new builds below. If you see anything else that looks like a bug please don't hesitate to report it on this forum.

APCC Standard v1.8.0.4:
http://www.apastrosoftware.com/apcc_download/APCC_Standard_Setup_1.8.0.4.exe

APCC Pro v1.8.0.5:
http://www.apastrosoftware.com/apcc_download/APCC_Pro_Setup_1.8.0.5.exe

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
Author of PEMPro V3: https://www.ccdware.com
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver


Re: APCC 1.8.0.3 : Custom Slew Rate missing

Ray Gralak
 

Hi Yves,

I really don't know what happened but now the custom field appears as it should in the Rate Settings tab section
on my home computer (the same computer model as observatory ; same HD backup image). I've uninstalled
APCC 1.8.0.3 and went back to version 1.7.2.5 and reinstalled version 1.8.0.3 after a reboot but impossible to
reproduce the behaviour I saw last night.

However, the slew rate custom field is still missing from the optional initialization window.
There was a problem but it should be fixed in the latest builds, 1.8.0.4 Standard and 1.8.0.5 Pro.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
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 Yves Laroche
Sent: Saturday, March 7, 2020 9:07 PM
To: main@ap-gto.groups.io
Subject: Re : [ap-gto] APCC 1.8.0.3 : Custom Slew Rate missing

Ray,

I really don't know what happened but now the custom field appears as it should in the Rate Settings tab section
on my home computer (the same computer model as observatory ; same HD backup image). I've uninstalled
APCC 1.8.0.3 and went back to version 1.7.2.5 and reinstalled version 1.8.0.3 after a reboot but impossible to
reproduce the behaviour I saw last night.

However, the slew rate custom field is still missing from the optional initialization window.

Regards,
Yves



Le 06/03/20 18:40, Yves Laroche <yves.laroche@...> a écrit :

[Edited Message Follows]

Hi Ray,

The custom slew rate fields are no longer available in the drop-down list menus. Please refer to the
Optional Initialization window and also to the Rate Settings tab.

Regards,
Yves



Re: Notified!😍 #mach2gto #Mach2GTO

Ray Gralak
 

Hi Terri,

Besides the pointing model aspect of APCC/APPM I’m not very clear on what this software does for the user, but
I’ve only read the setup so far so need to dive into it more.
APCC provides numerous features. Here is a link to a list of some of them:

https://www.siriusimaging.com/Help/APCC/features.htm

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
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 Terri Zittritsch
Sent: Saturday, March 7, 2020 7:19 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Notified!😍 #mach2gto #mach2gto

Thanks guys, I have received the mount and it’s all together and up and running. I’ve installed the v2 ascom
driver and gotten that working with cartes du ciel. This was all pretty fast and no troubles. I use EQMOD so it’s
all pretty similar. I’ve yet to try SGP but expect that will work fine.

I followed the setup instructions for the v2 driver which made that all pretty simple.

Where things get a bit confusing is with the APCC setup. I’ve read Ray’s instructions for APCC after having
already installed And setup the V2 driver and think they imply a different setup of the v2 driver with virtual ports
instead of the com port I used with the built in FTDI chip In the GTOCP5. I’m sure it’s not a huge deal to resolve,
it’s just confusing. Right now I’m thinking my first outside work will be with the V2 driver and SGPro and just
seeing how well it tracks and runs. Given I use an ASI 1600 cmos camera my exposures are typically 5 minutes
or less.

Besides the pointing model aspect of APCC/APPM I’m not very clear on what this software does for the user, but
I’ve only read the setup so far so need to dive into it more.

In general the mount is very solid and has zero play that I can feel, so it exudes quality craftsmanship.
The counterweight bar is heavy and balances my stowaway, without a weight, when it has no accessories or
imaging setup. I’m wondering if I need a 5 lb weight to tune the balance for the light scopes. So far I have only
purchased heavier weights.

So far, very happy with what I have, the real smiles will come when I can experience very good tracking. I just
need some cooperative weather now.


Terri


Re: Does APCC 1.8.0.2 update disable encoders?

Ray Gralak
 

Yes, mine is also off when I startup. But also, I noticed both yours and mine show the home positions as -100H
(HA) and -100 degrees (DEC). Does that mean the AE function needs to be initialized or calibrated? Also, seems
like those numbers are a bit extreme and should be limit checked in the software to something like +/- 6 hours for
HA and 0 degrees for DEC.
Those are the default uninitialized values which just weren't getting updated. The new builds, 1.8.0.4 and .5, fix this.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
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 Craig Young
Sent: Saturday, March 7, 2020 1:45 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Does APCC 1.8.0.2 update disable encoders?

Yes, mine is also off when I startup. But also, I noticed both yours and mine show the home positions as -100H
(HA) and -100 degrees (DEC). Does that mean the AE function needs to be initialized or calibrated? Also, seems
like those numbers are a bit extreme and should be limit checked in the software to something like +/- 6 hours for
HA and 0 degrees for DEC.

Craig


Re: Azimiuth Display around Park Altitude = 0

Ray Gralak
 

Hi Stacey,

I just updated to the newest version of APCC and the driver. I park at Park-2, which is basically azimuth=90,
altitude=0. When parked the altitude sometimes dithers a few arcseconds. With the new update I've noticed that
when the altitude dithers to a very small negative value (just a few arcsecs less than zero), the azimuth display
jumps from 90 to 270. I don't recall seeing this before the upgrade. Because of the weather, I haven't see whether
this has any effect on the dome slaving when the dome is sitting open at startup (cool down), the scope is at 90/0
and the dome is slaved to the scope. I hope doesn't try to do a 180 with each dither.
Alt/Az is being calculated from site latitude, RA, Dec and local sidereal time. When the mount is stopped RA is changing so depending on exactly when RA and sidereal time is polled there might be appear to be a slight change in Alt/Az. This was not changed recently.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
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 Stacey Mills
Sent: Friday, March 6, 2020 6:59 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Azimiuth Display around Park Altitude = 0

I just updated to the newest version of APCC and the driver. I park at Park-2, which is basically azimuth=90,
altitude=0. When parked the altitude sometimes dithers a few arcseconds. With the new update I've noticed that
when the altitude dithers to a very small negative value (just a few arcsecs less than zero), the azimuth display
jumps from 90 to 270. I don't recall seeing this before the upgrade. Because of the weather, I haven't see whether
this has any effect on the dome slaving when the dome is sitting open at startup (cool down), the scope is at 90/0
and the dome is slaved to the scope. I hope doesn't try to do a 180 with each dither.