Date   

Re: Triple Piggy Back Works!

Robert Sinitiere <bobstar9@...>
 

Well now you’ve done it, now I will have to place a quadruple piggyback on my AP SCOPE! Just kidding, your imaging set-up is magnificent and so are your images!

🎄🎄🎄⛄️Merry Christmas and Happy holidays!⛄️🧐🔭🎼🎄⛄️.  Bob S in Baton Rouge.    Stay safe!


On Dec 23, 2020, at 7:12 PM, Peter Bresler via groups.io <PABresler@...> wrote:



[Edited Message Follows]

Triple piggy back works! Shot taken with the SV80, weights are nearly maxed out.
<20201223_140214.jpg>
<IC 1805 Heart Nebula HHSO.jpg>


Re: Triple Piggy Back Works!

Jeffrey Wolff
 

Which mount do you have loaded up. I currently have the AP900 but waiting on the AP1100 so I can piggyback a refractor on my 10 inch f/4 newtonian. 

Your wires look like they have a lot of potential to snag. Looks like you have a roll away shed. I also use one.

Jeff


Re: Triple Piggy Back Works!

Frank Widmann
 

I’m not impressed with the image, particularly with an 80 mm scope. AP cautions against large moments of inertia. You are moving the center of gravity a long way from the RA axis. Even with good balance that creates a high inertia load. You have created a real cable management nightmare. All those wires add weight, affect balance and are snag opportunities. 

Frank

On Dec 23, 2020, at 5:12 PM, Peter Bresler via groups.io <PABresler@...> wrote:



[Edited Message Follows]

Triple piggy back works! Shot taken with the SV80, weights are nearly maxed out.
<20201223_140214.jpg>
<IC 1805 Heart Nebula HHSO.jpg>


Re: Triple Piggy Back Works!

Frank Widmann
 

AP has an extension for the counterweight shaft.

Frank

On Dec 23, 2020, at 5:12 PM, Peter Bresler via groups.io <PABresler@...> wrote:



[Edited Message Follows]

Triple piggy back works! Shot taken with the SV80, weights are nearly maxed out.
<20201223_140214.jpg>
<IC 1805 Heart Nebula HHSO.jpg>


Triple Piggy Back Works!

Peter Bresler
 
Edited

Triple piggy back works! Shot taken with the SV80, weights are nearly maxed out.


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

Roland Christen
 

If that's in the keypad, a -8 puts you somewhere in India or China.

Rolando



-----Original Message-----
From: John <obee11@...>
To: main@ap-gto.groups.io
Sent: Wed, Dec 23, 2020 6:03 pm
Subject: Re: [ap-gto] Initial GoTo In APCC Pro Cause Nose or Tail Dive

Aloha Ray and Dominique,

  Oops, I'm using ver 1.8.8.3.  I'll get the new version installed tonight.  The site location coordinates look good and the time offset is -8.00 for the Pacific time zone.
I'll double check the 'mount location' info in the "Site Tab" after installing the new version and re-connecting to the mount (via Ethernet).  I'm not connected to the mount right now

  What I meant about the keypad, was that I was using the keypad by itself (in stand alone mode with no laptop and no apcc).  As another test (for a goto), I powered up the mount with
just the keypad connected and all the initial gotos worked fine (no nose dive).  I haven't tried using both apcc and the keypad set to EXT yet. 

  I'll reply back after the 1.8.8.9 update,  No big deal if I have to use the 'find home' button first in apcc.  Last night I was thinking that maybe the initial goto nose dives in apcc had to do with me
removing power every night.  Thanks!!

      John

 
 

--
Roland Christen
Astro-Physics


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

John
 

Aloha Ray and Dominique,

  Oops, I'm using ver 1.8.8.3.  I'll get the new version installed tonight.  The site location coordinates look good and the time offset is -8.00 for the Pacific time zone.
I'll double check the 'mount location' info in the "Site Tab" after installing the new version and re-connecting to the mount (via Ethernet).  I'm not connected to the mount right now

  What I meant about the keypad, was that I was using the keypad by itself (in stand alone mode with no laptop and no apcc).  As another test (for a goto), I powered up the mount with
just the keypad connected and all the initial gotos worked fine (no nose dive).  I haven't tried using both apcc and the keypad set to EXT yet. 

  I'll reply back after the 1.8.8.9 update,  No big deal if I have to use the 'find home' button first in apcc.  Last night I was thinking that maybe the initial goto nose dives in apcc had to do with me
removing power every night.  Thanks!!

      John

 
 


Re: Precise polar alignment of the azimuth axis

John
 

Aloha Steve,

  Thanks, I will look into that!

  Spent all day (about 7 hrs) looking at drift alignment theory and trying to get my bearings.  I understand it better now.

  Seems like the drift align will be a lot easier sitting down with a camera (then doing it with a cross-hair eyepiece). May start off with PHD2 first
and then try the drift align (first with the star on the meridian/equator followed by the second star close to the horizon.  Then check what the RAPAS is showing.


Re: 10 inch f6.6 reflector on ap1100?

Robert Chozick
 

Thanks Roland. 

Robert 


On Dec 23, 2020, at 11:16 AM, Roland Christen via groups.io <chris1011@...> wrote:


The 1100 mount would hardly know it was there.

Rolando



-----Original Message-----
From: Robert Chozick via groups.io <rchozick@...>
To: main@ap-gto.groups.io
Sent: Wed, Dec 23, 2020 11:13 am
Subject: Re: [ap-gto] 10 inch f6.6 reflector on ap1100?

What about a 12.75 inch f 4.75 Newtonian on an 1100?  I also need to have it built as it is now a truss mount dob.  It should have a 15 inch tube, about 52 inches long and about 35-40 pounds. The mirror is a thin meniscus that is only about 8 pounds.   Or would a 1200 be better? 

Robert 


On Dec 22, 2020, at 8:47 PM, Roland Christen via groups.io <chris1011@...> wrote:



Would the mount handle it?
The 1100 mount would not even know it was there.
There are many coma correctors available for Newtonians, and you should be able to get good images over a full frame camera field.

Rolando


-----Original Message-----
From: Tom Blahovici <tom.va2fsq@...>
To: main@ap-gto.groups.io
Sent: Tue, Dec 22, 2020 8:36 pm
Subject: [ap-gto] 10 inch f6.6 reflector on ap1100?

Hi
I have an 1100 on order and I have an old 10 inch f6.6 reflector with superb optics. I was thinking I might try imaging with it. Would the mount handle it?
At the moment it is a truss tube DOB. I would need to completely redesign the tube. Any suggestions here? Imaging would be with an asi6200 and filter wheel. I do realize I will need to drastically crop the photos but is there anyway to correct for the coma etc?
Thanks

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Craig Young

Max Mirot
 

How do get in touch with you about Atrack?

Max Mirot


Re: leveling the RAPAS on Mach2

Don Anderson
 

The AP portable pier has quite a bit of adjustment range using the turnbuckles for leveling the top plate.

Don Anderson


On Wednesday, December 23, 2020, 10:00:40 a.m. MST, Jeffc <jeffcrilly@...> wrote:


Fwiw...  I use an AP portable pier which does not have level adjustment.   I’m more concerned with weight imbalance but I also prefer a level pier when imagining.   

So... I level the pier with a plastic bubble level (or iPhone measure app) and some thin hardwood “shims” under one (or two) of legs as needed.  

-jeff 


Re: leveling the RAPAS on Mach2

Harley Davidson
 

Jeff

Could you try this:
Leveling a Telescope Tripod by Shimming it (HOW TO)
https://www.youtube.com/watch?v=AjHrB34E0Rs

This is my video. I use this technique all the time. I just find it easier even though I can adjust the legs position. And I only concern myself with East West level.

tony

On 12/23/2020 12:00 PM, Jeffc wrote:
Fwiw...  I use an AP portable pier which does not have level adjustment.   I’m more concerned with weight imbalance but I also prefer a level pier when imagining.   

So... I level the pier with a plastic bubble level (or iPhone measure app) and some thin hardwood “shims” under one (or two) of legs as needed.  

-jeff 


AsiairPro and CP4

Steve Salvo
 

Good Afternoon,

For those of you using the Asiair Pro, what method are are you using to connect to the Asiair Pro to your CP4?  WiFi, USB cable, Ethernet cable.....

Thanks
Steve


Re: leveling the RAPAS on Mach2

Roland Christen
 


But I really want to make things right, and I hope someone can answer me about the squareness between the top surface of the RA motor box and the polar scope.
The top surface of the motor box and the polar scope are machined to be square with respect to the bottom surface of the mount.

Rolando


-----Original Message-----
From: weihaowang <whwang@...>
To: main@ap-gto.groups.io
Sent: Wed, Dec 23, 2020 9:35 am
Subject: Re: [ap-gto] leveling the RAPAS on Mach2

Hi,

Perhaps as you said, it doesn't matter that much.  But I really want to make things right, and I hope someone can answer me about the squareness between the top surface of the RA motor box and the polar scope.  If this is the case, then an inclinometer in a cell phone can easily solve the problem.

And as Hilmo said, it is exactly the wrong clock angle that concerns me.  Polaris is roughly 0.8 degree from the pole.  An error of 2 degrees (or 8 minutes) in the clock angle (a 2 degree tilt of the tripod) translates to 1.7 arcmin of polar alignment error.  For guided exposure of less than 10 minutes with a guide-star inside the FoV of a few degrees, the 1.7 arcmin of polar alignment is probably OK and will not introduce observable field rotation within the single exposures.  However, the polar alignment error introduced by the tripod tilt is just one of the error budgets.  There can be other polar errors, and all the errors can add up. So I want to do my best to control the error associated with the tripod tilt.

Cheers,
Wei-Hao

--
Homepage:

--
Roland Christen
Astro-Physics


Re: Meridian Flip Feature Yet?

Roland Christen
 

APCC has a flip feature. The latest keypad software also has a flip feature as well as the original meridian delay.

Rolando



-----Original Message-----
From: ray.palmer@...
To: main@ap-gto.groups.io
Sent: Tue, Dec 22, 2020 11:57 pm
Subject: [ap-gto] Meridian Flip Feature Yet?

Hi Group,

I am using a 1600GTO. Just wondering if any of the latest software updates have included a Meridian Flip feature yet please (I haven't updated the firmware for about two years)? AP make elite mounts there is no question, but many other brands have had this feature for many years, it is industry standard, where you basically press one button and she flips. I'm not looking for a timely work around solution, such as trying to reset the meridian to trick the mount into flipping (that is clunky, time consuming and not user friendly if you require to do it a few times per night). I am looking for instantaneous functionality like many other brand mounts have built into them. I have to flip numerous times through the night and it is not because of the meridian (dome slit angle, power pole, observatory door, etc). Otherwise is there any software that can flip an AP mount please? Thanks in advance and have a great Xmas. 
--
Raymond D Palmer
Astronomer
Western Australia
www.MyAstroSpace.com
www.TheCosmicArtGallery.com

--
Roland Christen
Astro-Physics


Re: 10 inch f6.6 reflector on ap1100?

Roland Christen
 

The 1100 mount would hardly know it was there.

Rolando



-----Original Message-----
From: Robert Chozick via groups.io <rchozick@...>
To: main@ap-gto.groups.io
Sent: Wed, Dec 23, 2020 11:13 am
Subject: Re: [ap-gto] 10 inch f6.6 reflector on ap1100?

What about a 12.75 inch f 4.75 Newtonian on an 1100?  I also need to have it built as it is now a truss mount dob.  It should have a 15 inch tube, about 52 inches long and about 35-40 pounds. The mirror is a thin meniscus that is only about 8 pounds.   Or would a 1200 be better? 

Robert 


On Dec 22, 2020, at 8:47 PM, Roland Christen via groups.io <chris1011@...> wrote:



Would the mount handle it?
The 1100 mount would not even know it was there.
There are many coma correctors available for Newtonians, and you should be able to get good images over a full frame camera field.

Rolando


-----Original Message-----
From: Tom Blahovici <tom.va2fsq@...>
To: main@ap-gto.groups.io
Sent: Tue, Dec 22, 2020 8:36 pm
Subject: [ap-gto] 10 inch f6.6 reflector on ap1100?

Hi
I have an 1100 on order and I have an old 10 inch f6.6 reflector with superb optics. I was thinking I might try imaging with it. Would the mount handle it?
At the moment it is a truss tube DOB. I would need to completely redesign the tube. Any suggestions here? Imaging would be with an asi6200 and filter wheel. I do realize I will need to drastically crop the photos but is there anyway to correct for the coma etc?
Thanks

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: 10 inch f6.6 reflector on ap1100?

Robert Chozick
 

What about a 12.75 inch f 4.75 Newtonian on an 1100?  I also need to have it built as it is now a truss mount dob.  It should have a 15 inch tube, about 52 inches long and about 35-40 pounds. The mirror is a thin meniscus that is only about 8 pounds.   Or would a 1200 be better? 

Robert 


On Dec 22, 2020, at 8:47 PM, Roland Christen via groups.io <chris1011@...> wrote:



Would the mount handle it?
The 1100 mount would not even know it was there.
There are many coma correctors available for Newtonians, and you should be able to get good images over a full frame camera field.

Rolando


-----Original Message-----
From: Tom Blahovici <tom.va2fsq@...>
To: main@ap-gto.groups.io
Sent: Tue, Dec 22, 2020 8:36 pm
Subject: [ap-gto] 10 inch f6.6 reflector on ap1100?

Hi
I have an 1100 on order and I have an old 10 inch f6.6 reflector with superb optics. I was thinking I might try imaging with it. Would the mount handle it?
At the moment it is a truss tube DOB. I would need to completely redesign the tube. Any suggestions here? Imaging would be with an asi6200 and filter wheel. I do realize I will need to drastically crop the photos but is there anyway to correct for the coma etc?
Thanks

--
Roland Christen
Astro-Physics


Re: leveling the RAPAS on Mach2

Roland Christen
 


But I may be mistaken in this notion as I don't fully understand how the absolute encoders work. Perhaps an azimuth tilt in an otherwise precisely aligned polar axis would affect how the Mach2 perceives its position. Would the ultra precise Home Position then be off?
Yes, the encoders do not have tilt sensors to compensate for an out of level setup. So for a 1 degree tilt E-W you will have a pointing error of 1 degree in RA when referencing any sky object to the absolute home position (this is normal for any mount that has an absolute Home). However, once you center and recal on any sky object, all other objects will be referenced from this recal position, not from the Home position. Therefore in reality the tilt error will be compensated for all subsequent slews to any object on either side of the meridian. That assumes you don't have an orthogonal error in your optical train - but that can also be compensated by using our ortho fix in the keypad, or a quick model in APCC Pro.-

Rolando


-----Original Message-----
From: ernie.mastroianni@...
To: main@ap-gto.groups.io
Sent: Wed, Dec 23, 2020 7:46 am
Subject: Re: [ap-gto] leveling the RAPAS on Mach2

My thinking has been that if the RAPAS is properly calibrated to the Mach2's RA axis, then a non-leveled tripod won't make a difference. Once the polar axis is precisely aligned, it does not care what is going on below. In the past, the difficulty from a non-level mount presents itself when trying to drift align. Adjustments in alt and az are intertwined. You'd really need a level tripod to calibrate the RAPAS, but perhaps once that is done, you should be fine.

But I may be mistaken in this notion as I don't fully understand how the absolute encoders work. Perhaps an azimuth tilt in an otherwise precisely aligned polar axis would affect how the Mach2 perceives its position. Would the ultra precise Home Position then be off?

Ernie

--
Roland Christen
Astro-Physics


Re: leveling the RAPAS on Mach2

Jeffc
 

Fwiw...  I use an AP portable pier which does not have level adjustment.   I’m more concerned with weight imbalance but I also prefer a level pier when imagining.   

So... I level the pier with a plastic bubble level (or iPhone measure app) and some thin hardwood “shims” under one (or two) of legs as needed.  

-jeff 


Re: Version P02-08 now available for GTOCP4 and GTOCP5 control boxes

Roland Christen
 

Serial numbers 89 and later have version P02-08

Rolando



-----Original Message-----
From: weihaowang <whwang@...>
To: main@ap-gto.groups.io
Sent: Tue, Dec 22, 2020 11:16 pm
Subject: Re: [ap-gto] Version P02-08 now available for GTOCP4 and GTOCP5 control boxes

Hi Marj,

Could you tell me how to identify the version of my GTOCP5 so I know if I need the update?
I got the Mach2 two weeks ago, but I am not sure if the update is needed.

Also, when I proceed to the download, the website asked for my username and password.
How do I get these?

Thanks.

Wei-Hao

--
Homepage:

--
Roland Christen
Astro-Physics

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