Date   

Re: Need width and thread size of threaded top end if 1.875” counterweight shafts

M Hambrick
 

Hi Mark

That will be a very expensive tap since it is not a standard size.

I hope you are not asking because the counterweight shaft threads in the Dec axis cap are stripped. If that is the case you will probably have to get a replacement.

If you just want to chase the threads to clean them up you may be able to get someone to make a chaser for you on a lathe. It does not have to be tool steel since it will only be used on aluminum. If you are able to get the threads cleaned up I recommend using powdered graphite on the counterweight shaft to act as a lubricant. Stainless steel is especially bad about galling aluminum threads, and the powdered graphite will help to avoid this. Use sparingly ! Otherwise all of your beautiful white mount and optical tubes will soon be covered with black smudges.

FYI there was another thread on the forum not long ago where it was mentioned that all of the new mounts have a stainless steel insert in the cap. Although bronze would make a better insert material than stainless, it is still much better than aluminum. Marj mentioned that sometime before too long these caps will be available to purchase as a separate part. As soon as they become available for replacement parts I plan to buy one.


Re: Meridian Flip Feature Yet?

ray.palmer@...
 

On Sun, Dec 27, 2020 at 10:55 PM, Ray Gralak wrote:
It is easy to automate the flip point. You can do this using the AP V2 ASCOM driver (or the hand controller). You can configure the flip-point so that the mount will flip at the necessary hour angle with a slew to the same RA/Dec.

APCC's meridian limits feature goes much further. It allows you to define different flip points for each declination and pier-side. In operation, this allows worry-free pier flipping and tracking limits to prevent pier collisions without any human intervention. I don't think any of the other mounts you mention have that feature.
Hi Ray, 

Thanks for your feedback, however I don't want my mount to flip at any particular hour angle. This is not a seamless or user friendly process for someone that just needs to flip to the other side of the pier. I also do not need to define different flip points for each declination point. It seems AP has completely missed the point of why many of us need to pier flip. It has nothing to do with the meridian. 

There is also a sentiment on here about the scope crashing into the mount and that is why AP have made this feature the way it is. No other brand I have used has this issue (I've used those brands extensively, AP's build wins, but a simple pier flip is badly needed). The scope simply slews through the counter weight down position and then continues onto its target on the other side of the pier for a safe pier flip. No threat of crashing, no trying to trick the mount into thinking the meridian is elsewhere. Pier flip is not dangerous or hard to develop. 

Rolando I do have the latest hand controller software. Version 4.19.3, I downloaded and installed it purely because of this thread, hoping to gain a pier flip function. I am using a GTOCP3. When I follow your instructions and hit the +- button, and then press 9, nothing happens. Please tell me how to access the pier flip please? When I hit +- then 9 as per your instructions at the beginning of this thread, nothing happens. 

Rolando Christen wrote:

The main reason we never had it before is because it is way too easy to crash the scope into the pier by just pressing a flip button when the scope does not have enough clearance on the other side under the mount. So, in trying to keep your equipment safe, we made it a bit harder for you in the past and probably gave you the impression that we just didn't know how to do some things that other companies have done for a long time. We fixed that now with our latest software, so you will be able to flip the scope back and forth as needed with just one button push.

Sorry, but again, there is no danger of a scope crashing into the mount if the mount slews through the counter weight down position halfway through its pier flip. All other major brands have a single touch pier flip feature and there is no danger when someone does a pier flip with those brands or yours, and there is no messing with hour angles or meridian delays to get the mount to flip.

The contention that AP lacks a simple pier flip feature to protect our scopes doesn't make sense and is confirmed by most other leading brands offering simple pier flip functionality and doing it easily without issue. There is no danger of a correctly programmed pier flip feature damaging our scopes. 

So from reading other comments here, am I right in thinking that AstroPhysics 1600GTO with a GTOCP3 using the latest software 4.19.3 cannot do a simple pier flip on command. Is this correct please? 

Thank you for your comments so far gentlemen and I hope you are all enjoying your holiday season. 

--
Raymond D Palmer
Astronomer
Western Australia
www.MyAstroSpace.com
www.TheCosmicArtGallery.com


Re: van den Bergh 14 and 15 in Camelopardalis

Luca Marinelli
 

That’s a great image, Joel!

Luca

On Dec 27, 2020, at 8:28 PM, Steve Reilly via groups.io <sreilly24590@...> wrote:



Very nice indeed.

 

-Steve

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Joel Short
Sent: Sunday, December 27, 2020 6:32 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] van den Bergh 14 and 15 in Camelopardalis

 

Hello friends, I thought I'd share my latest image of van den Bergh 14 and 15 in Camelopardalis.  This image was taken with a tandem refractor setup mounted on an AP1100GTO CP4.  I was a little surprised how this one turned out considering it was captured during the smoky skies caused by the western wildfires this past Fall (I'm in norther IN). I'm working in the vdB catalog of reflection nebulae, although there is also a bit of emission in vdB15 as well.  This is 17hrs total exposure. 
Also, I'm excited to mount a newly acquired AGO 12.5" iDK on the AP1100 soon!  I might need more counterweights though.  
joel

Image and details:  https://buckeyestargazer.net/Pages/Nebulae/vdB15.php

<image001.jpg>


Re: Initial GoTo In APCC Pro Cause Nose or Tail Dive

John
 

Aloha Ray,

  Yes sir, that FIXED IT!!  Thank you and sorry about all the confusion and trouble!

  I was logged onto this forum earlier, but missed the '2nd page'

  Via apcc, after connecting, manual slews worked with no problem, the dec coordinates display.  Tried a goto to Deneb and no problem!  I disconnected and reconnected again and
everything is good!  Never touched the 'find home button.'    Other than the sidereal tracking rate, I'm not seeing the  "extremely high tracking rate"  that you mentioned.

  I did have the ascom platform 6.5 installed a month or two ago, and Howard got me squared away with that (ie un-install it and use ver 6.4).  I haven't got to the point of
actually using the modeling module yet.  However, I was in the modeling tab last week to look around and I guess I must have enabled the pointing and tracking modeling.options
(when basically there was no 'real' model to use).  Thanks again for all your help!!  I'll be more careful

      John


Re: van den Bergh 14 and 15 in Camelopardalis

Steve Reilly
 

Very nice indeed.

 

-Steve

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Joel Short
Sent: Sunday, December 27, 2020 6:32 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] van den Bergh 14 and 15 in Camelopardalis

 

Hello friends, I thought I'd share my latest image of van den Bergh 14 and 15 in Camelopardalis.  This image was taken with a tandem refractor setup mounted on an AP1100GTO CP4.  I was a little surprised how this one turned out considering it was captured during the smoky skies caused by the western wildfires this past Fall (I'm in norther IN). I'm working in the vdB catalog of reflection nebulae, although there is also a bit of emission in vdB15 as well.  This is 17hrs total exposure. 
Also, I'm excited to mount a newly acquired AGO 12.5" iDK on the AP1100 soon!  I might need more counterweights though.  
joel

Image and details:  https://buckeyestargazer.net/Pages/Nebulae/vdB15.php


Re: van den Bergh 14 and 15 in Camelopardalis

 

beautiful, wow. well done


On Sun, Dec 27, 2020 at 3:32 PM Joel Short <buckeyestargazer@...> wrote:
Hello friends, I thought I'd share my latest image of van den Bergh 14 and 15 in Camelopardalis.  This image was taken with a tandem refractor setup mounted on an AP1100GTO CP4.  I was a little surprised how this one turned out considering it was captured during the smoky skies caused by the western wildfires this past Fall (I'm in norther IN). I'm working in the vdB catalog of reflection nebulae, although there is also a bit of emission in vdB15 as well.  This is 17hrs total exposure. 
Also, I'm excited to mount a newly acquired AGO 12.5" iDK on the AP1100 soon!  I might need more counterweights though.  
joel

Image and details:  https://buckeyestargazer.net/Pages/Nebulae/vdB15.php



--
Brian 



Brian Valente


van den Bergh 14 and 15 in Camelopardalis

Joel Short
 

Hello friends, I thought I'd share my latest image of van den Bergh 14 and 15 in Camelopardalis.  This image was taken with a tandem refractor setup mounted on an AP1100GTO CP4.  I was a little surprised how this one turned out considering it was captured during the smoky skies caused by the western wildfires this past Fall (I'm in norther IN). I'm working in the vdB catalog of reflection nebulae, although there is also a bit of emission in vdB15 as well.  This is 17hrs total exposure. 
Also, I'm excited to mount a newly acquired AGO 12.5" iDK on the AP1100 soon!  I might need more counterweights though.  
joel

Image and details:  https://buckeyestargazer.net/Pages/Nebulae/vdB15.php


Re: Need width and thread size of threaded top end if 1.875” counterweight shafts

Mark Dearing
 

Thank you very much for the diameter and thread pitch!
I was hoping to find a tap of the same size; 
Roland, Howard, or George are invited to comment about this not being 
an ANSI size?

Mark


Re: IC434 first picture for my AP MACH2 and custom built corrected newton #Mach2GTO

Richard Hennig
 

That’s a beautiful setup and I love the detail and color in the image.

Thanks for sharing.

Clear skies,
Richard


— 
Richard G. Hennig
Professor and Alumni Professor of Materials Science and Engineering
Associate Director, Quantum Theory Project
Department of Materials Science and Engineering, University of Florida
Email: rhennig@...
Web: http://hennig.mse.ufl.edu

On Dec 27, 2020, at 10:21 AM, Andrea Lucchetti <andlucchett@...> wrote:

Hi,
I am happy to share my first picture with the mount.
I hope it is not off topic, but please tell me.
After years running an observatory I came back to a nomad set up and I have chosen the MACH2.
The mount is perfect for my set up at 24 kg all included.

It is a Newton corrected and illuminated over a KAF 16803.

At the following link my first image , hope you like it.
https://andrealucchetti.smugmug.com/Astrophotography/Nebulae/i-HDpZ2mD

Attached my set up.

Andrea <AP Mach 2 _ CN 200mm f 3.9 Custom Made.jpg>


Re: IC434 first picture for my AP MACH2 and custom built corrected newton #Mach2GTO

Andrea Lucchetti
 

thank you!


Re: IC434 first picture for my AP MACH2 and custom built corrected newton #Mach2GTO

Andrea Lucchetti
 

thank you Roland


Re: Can significant temperature changes alter the model? #APCC #Mach2GTO

Marcelo Figueroa
 

Thank you for the quick response.
 
Ray, I am using an SW Esprit 100.


Re: Meridian Flip Feature Yet?

Roland Christen
 


will the new keypad software work on GOTO CP3 V chip?
No, I'm afraid not.

Roland


-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sun, Dec 27, 2020 3:19 pm
Subject: Re: [ap-gto] Meridian Flip Feature Yet?

will the new keypad software work on GOTO CP3 V chip?

Don Anderson


On Sunday, December 27, 2020, 09:04:33 a.m. MST, Roland Christen via groups.io <chris1011@...> wrote:


The original keypad has only the meridian delay feature. You can move the meridian flip point either east or west so when you enter the object again and press GoTo, the mount will flip around and acquire the object in a counterweight up position. Since this requires some thinking on the operator, it becomes a bit of a problem trying to choose which way to move the meridian in order to get the mount to flip.

So, in our latest keypad software release, which was first introduced in the Mach2 and will be available shortly for all the other mounts, we have added a simple button push which automatically flips the mount and sets the meridian delay appropriately.

The main reason we never had it before is because it is way too easy to crash the scope into the pier by just pressing a flip button when the scope does not have enough clearance on the other side under the mount. So, in trying to keep your equipment safe, we made it a bit harder for you in the past and probably gave you the impression that we just didn't know how to do some things that other companies have done for a long time. We fixed that now with our latest software, so you will be able to flip the scope back and forth as needed with just one button push.

Rolando



-----Original Message-----
From: ray.palmer@...
To: main@ap-gto.groups.io
Sent: Sun, Dec 27, 2020 4:49 am
Subject: Re: [ap-gto] Meridian Flip Feature Yet?

Hi Chris, 

I appreciate your feedback, but nope, I am not new to astrophysics mounts. There are many brand mounts out there that have a meridian flip feature. You hit one or two buttons and she flips. Many mount owners, due to their observatory or environment, may only need to flip once the object they are imaging passes the meridian, and AP has developed a mount that can track for many hours past the meridian. 

I need to flip due to the angle of my dome slit, neighbors trees, observatory door, etc. On a mount as advanced as an AP, there should be a simplistic function that tells the mount the flip immediately without trying to trick it into thinking it has hit the meridian, this is quite standard on many of the mount brands you mention. It kind of blows me away that this feature has to be sold on here. If you've always had an environment where meridian flips are not required unless hours have passed since hitting the meridian, then I understand your feedback. But for those of us that need to flip the mount before even hitting the meridian, its a different world. 

--
Raymond D Palmer
Astronomer
Western Australia
www.MyAstroSpace.com
www.TheCosmicArtGallery.com

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: Meridian Flip Feature Yet?

Don Anderson
 

will the new keypad software work on GOTO CP3 V chip?

Don Anderson


On Sunday, December 27, 2020, 09:04:33 a.m. MST, Roland Christen via groups.io <chris1011@...> wrote:


The original keypad has only the meridian delay feature. You can move the meridian flip point either east or west so when you enter the object again and press GoTo, the mount will flip around and acquire the object in a counterweight up position. Since this requires some thinking on the operator, it becomes a bit of a problem trying to choose which way to move the meridian in order to get the mount to flip.

So, in our latest keypad software release, which was first introduced in the Mach2 and will be available shortly for all the other mounts, we have added a simple button push which automatically flips the mount and sets the meridian delay appropriately.

The main reason we never had it before is because it is way too easy to crash the scope into the pier by just pressing a flip button when the scope does not have enough clearance on the other side under the mount. So, in trying to keep your equipment safe, we made it a bit harder for you in the past and probably gave you the impression that we just didn't know how to do some things that other companies have done for a long time. We fixed that now with our latest software, so you will be able to flip the scope back and forth as needed with just one button push.

Rolando



-----Original Message-----
From: ray.palmer@...
To: main@ap-gto.groups.io
Sent: Sun, Dec 27, 2020 4:49 am
Subject: Re: [ap-gto] Meridian Flip Feature Yet?

Hi Chris, 

I appreciate your feedback, but nope, I am not new to astrophysics mounts. There are many brand mounts out there that have a meridian flip feature. You hit one or two buttons and she flips. Many mount owners, due to their observatory or environment, may only need to flip once the object they are imaging passes the meridian, and AP has developed a mount that can track for many hours past the meridian. 

I need to flip due to the angle of my dome slit, neighbors trees, observatory door, etc. On a mount as advanced as an AP, there should be a simplistic function that tells the mount the flip immediately without trying to trick it into thinking it has hit the meridian, this is quite standard on many of the mount brands you mention. It kind of blows me away that this feature has to be sold on here. If you've always had an environment where meridian flips are not required unless hours have passed since hitting the meridian, then I understand your feedback. But for those of us that need to flip the mount before even hitting the meridian, its a different world. 

--
Raymond D Palmer
Astronomer
Western Australia
www.MyAstroSpace.com
www.TheCosmicArtGallery.com

--
Roland Christen
Astro-Physics


Re: Can significant temperature changes alter the model? #APCC #Mach2GTO

Ray Gralak
 

Hi Marcelo,

It's summer here in the Southern Hemisphere and I'm learning how the modeling works in my Mach2. Two nights ago
the temperature at night was high, around 20ºC and in almost all the frames of that night my stars were elongated,
when the night before they were perfect. Then yesterday the temperature was 16ºC and the stars were perfectly round
again.
Yes, the temperature can affect both the refraction calculation and the Young modulus (flexure) of an instrument. APCC does account for refraction, but since flexure can also change with temperature, the model can change slightly.

A future version of APCC will be able to use APPM data collected over an arbitrary number of nights with a goal to predict flexure changes in a setup based on temperature.

So, as the temperature changes, you might consider doing new mapping runs to collect data points for that future version of APCC.

BTW, what type of telescope are you using?

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
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 Marcelo Figueroa via groups.io
Sent: Sunday, December 27, 2020 12:13 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Can significant temperature changes alter the model? #APCC #Mach2GTO


It's summer here in the Southern Hemisphere and I'm learning how the modeling works in my Mach2. Two nights ago
the temperature at night was high, around 20ºC and in almost all the frames of that night my stars were elongated,
when the night before they were perfect. Then yesterday the temperature was 16ºC and the stars were perfectly round
again.

My installation is semi-permanent, without any recent changes. I am using 4 minute unguided narrowband exposures
and use a Pegasus Pocket Powerbox Advance to get the temperature.

Thanks


Re: IC434 first picture for my AP MACH2 and custom built corrected newton #Mach2GTO

Don Anderson
 

Beautiful image Andrea! 

Don Anderson


On Sunday, December 27, 2020, 08:21:24 a.m. MST, Andrea Lucchetti <andlucchett@...> wrote:


Hi,
I am happy to share my first picture with the mount.
I hope it is not off topic, but please tell me.
After years running an observatory I came back to a nomad set up and I have chosen the MACH2.
The mount is perfect for my set up at 24 kg all included.

It is a Newton corrected and illuminated over a KAF 16803.

At the following link my first image , hope you like it.
https://andrealucchetti.smugmug.com/Astrophotography/Nebulae/i-HDpZ2mD

Attached my set up.

Andrea


Re: Can significant temperature changes alter the model? #APCC #Mach2GTO

Roland Christen
 

Yes, temperature has a large effect on the modeling. Ray can comment on that, but I have seen this many times myself.

Rolando



-----Original Message-----
From: Marcelo Figueroa via groups.io <marfig1970@...>
To: main@ap-gto.groups.io
Sent: Sun, Dec 27, 2020 2:12 pm
Subject: [ap-gto] Can significant temperature changes alter the model? #APCC #Mach2GTO


It's summer here in the Southern Hemisphere and I'm learning how the modeling works in my Mach2. Two nights ago the temperature at night was high, around 20ºC and in almost all the frames of that night my stars were elongated, when the night before they were perfect. Then yesterday the temperature was 16ºC and the stars were perfectly round again.
 
My installation is semi-permanent, without any recent changes. I am using 4 minute unguided narrowband exposures and use a Pegasus Pocket Powerbox Advance to get the temperature.
 
Thanks

--
Roland Christen
Astro-Physics


Can significant temperature changes alter the model? #APCC #Mach2GTO

Marcelo Figueroa
 


It's summer here in the Southern Hemisphere and I'm learning how the modeling works in my Mach2. Two nights ago the temperature at night was high, around 20ºC and in almost all the frames of that night my stars were elongated, when the night before they were perfect. Then yesterday the temperature was 16ºC and the stars were perfectly round again.
 
My installation is semi-permanent, without any recent changes. I am using 4 minute unguided narrowband exposures and use a Pegasus Pocket Powerbox Advance to get the temperature.
 
Thanks


Re: Precise polar alignment of the azimuth axis

John
 

Aloha Steven and Deonb,

  Yes, I have been using the Sharpcap polar align tool and really like it.  And I understand what all is going on now with the az and alt (ie 2 star)
drift alignment.  I'm going to try the PHD2 drift align next and then try another drift align with just a camera (no other software).  And then compare
these various techniques (as what Deonb is doing)...

  I'm kind of curious to see how PHD2 and SharpCap compare (as to what each one is reporting in the way of polar align error).  And then try Roland's method.
I'm sure either method is fine, especially if a little modeling is thrown in afterwards.  Just curious at trying a few different techniques more than anything else.  And I
still need to look into that SharpCap cone error business!

  I was able to get 8 mins unguided exposures the other night in the Pleiades region and ran out of time to try 10 mins.  I did get 10 mins on either Deneb or Sadr,
(on a different night) but you could tell some oblong stars were creeping in to the mix.  One 12 min exposure showed definite oblong stars.  But all without modeling!

    John


Re: Mount RA/DEC slew math

Roland Christen
 

Is there an atmospheric refraction calculation happening? If so, then the difference would be about +- 1/2 degree from one side to the other.

Rolando



-----Original Message-----
From: deonb <deonb@...>
To: main@ap-gto.groups.io
Sent: Sun, Dec 27, 2020 10:21 am
Subject: Re: [ap-gto] Mount RA/DEC slew math

The RA axis actually visually move. Not by a lot, but much more than can be explained by sidereal.

I don't rely on the camera for anything yet since I can't rationalize the mount movement yet.

I've just looked up the RA/DEC coordinates as the mount report it when it's at those 2 Alt/Az points:
Alt 0, Az 90 translates to RA: 20:25:25 Dec: 0
Alt 0, Az 270 translates to RA: 8:25:25 (+ sidereal) Dec: 0

So delta the meridian flip, that's the same RA plane - at least I'm not completely going crazy. But it doesn't seem to travel on that plane from point A to point B when it's slewing...

This is not technically an issue for me, since I want to move the mount by hand anyway. The issue is that I don't understand why it's doing this during an automated slew, so I don't know if my tests are valid.

--
Roland Christen
Astro-Physics

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