Date   

gtocp4

Suresh Mohan
 

Hi friends ,
I own a Mach 1 and on my good day buy a AP 1100 . I have a gtocp3 controller that works super fine , pls tell me if I should buy a new controller and why ?
Thanks for your time
Suresh


Re: Some new images

Karen Christen
 

Simply stunning, Jose.  I don’t think I’ve ever seen an image of NGC 1398 before.  Thanks to your work, it’s now one of my favorites.

Karen

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Jos? Joaqu?n P?rez Guy
Sent: Tuesday, January 21, 2020 8:17 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Some new images

 

Dear group, would like to share with you some images that I processed in the last months.

 

  • NGC 6752 : a big globular in Pavo (actually the third brightest after Omega Cen and 47Tuc)
  • NGC 1398 : galaxy in Fornax, exhibiting an interesting double ring
  • NGC 1531/1532 : a pair of interacting galaxies in Eridanus

Please review the NEW colum at my website :

 

 

Thanks for looking and best wishes,


--
Karen Christen
Astro-Physics


Re: Rotating pier adapter #Polar_Alignment

Mark
 

I may have a pier adapter for an AP 900GTO that rotates 360. Finding it is the problem…

It is machined for an ATS pier.

Mark


Changing Counter weight and pierside orientation

Max Mirot
 

I am a new owner of a 1100AE. Off course,  my first RCal/sync put the counter weight up rather than down.  Otherwise, the scope was pointing correcting. Eventually, I was able to fix this but it required physical interaction with mount.
I could not any action to change counter weight position or pier side using the  APCC or AP driver. Does this feature exist?   It would be very helpful to use in this situation.

Thanks

Max


Advantages of Meridian features

Max Mirot
 

I find the new Meridian features very interesting.
Most automation software does a pretty good just of flipping the mount now a days. So I ask what are the main advantages?

Obviously, there is some lost time if you have to flip.

Also, If you a have small chip on a OAG you have a lot of complexity after a flip.
You need a rotator to get the guide star back on the sensor if you flip too.

Are there other advantages?  Does using a the same side tracking model help with unguided imaging?

Thanks

Max


Re: New Keypad Software

Dean Jacobsen
 

Hi Peter, this is the latest that I have seen regarding the yet-to-be-released version 5 keypad upgrade:

https://ap-gto.groups.io/g/main/topic/upgrade_to_new_keypad_version/69318928?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,69318928


Re: Some new images

REDIGER-LIZLOV Didier
 

hello very nice pictures from a very good site (we have also a new set up at El Sauce). a very good processing in my opinion.
thanks for sharing.


Didier REDIGER-LIZLOV


De : main@ap-gto.groups.io <main@ap-gto.groups.io> de la part de Jos� Joaqu�n P�rez Guy <cotejardinero@...>
Envoyé : mercredi 22 janvier 2020 03:17
À : main@ap-gto.groups.io <main@ap-gto.groups.io>
Objet : [ap-gto] Some new images
 
Dear group, would like to share with you some images that I processed in the last months.
 
  • NGC 6752 : a big globular in Pavo (actually the third brightest after Omega Cen and 47Tuc)
  • NGC 1398 : galaxy in Fornax, exhibiting an interesting double ring
  • NGC 1531/1532 : a pair of interacting galaxies in Eridanus
Please review the NEW colum at my website :
 
 
Thanks for looking and best wishes,


Re: Some new images

Jos� Joaqu�n P�rez Guy
 

Many thanks Don and Joe for your replies!

CS

Joaquín


Re: Some new images

Joe Renzetti <axnyslie@...>
 

Those are really nice well done!

Joe


On Tue, Jan 21, 2020 at 9:17 PM Jos� Joaqu�n P�rez Guy <cotejardinero@...> wrote:
Dear group, would like to share with you some images that I processed in the last months.
 
  • NGC 6752 : a big globular in Pavo (actually the third brightest after Omega Cen and 47Tuc)
  • NGC 1398 : galaxy in Fornax, exhibiting an interesting double ring
  • NGC 1531/1532 : a pair of interacting galaxies in Eridanus
Please review the NEW colum at my website :
 
 
Thanks for looking and best wishes,


Re: Some new images

Don Anderson
 

Beautiful images Jose! 

Don Anderson


On Tuesday, January 21, 2020, 07:17:13 p.m. MST, Jos� Joaqu�n P�rez Guy <cotejardinero@...> wrote:


Dear group, would like to share with you some images that I processed in the last months.
 
  • NGC 6752 : a big globular in Pavo (actually the third brightest after Omega Cen and 47Tuc)
  • NGC 1398 : galaxy in Fornax, exhibiting an interesting double ring
  • NGC 1531/1532 : a pair of interacting galaxies in Eridanus
Please review the NEW colum at my website :
 
 
Thanks for looking and best wishes,


Some new images

Jos� Joaqu�n P�rez Guy
 

Dear group, would like to share with you some images that I processed in the last months.
 
  • NGC 6752 : a big globular in Pavo (actually the third brightest after Omega Cen and 47Tuc)
  • NGC 1398 : galaxy in Fornax, exhibiting an interesting double ring
  • NGC 1531/1532 : a pair of interacting galaxies in Eridanus
Please review the NEW colum at my website :
 
 
Thanks for looking and best wishes,


Re: New Keypad Software

Bill Long
 

https://www.astro-physics.info/index.htm?tech_support/mounts/keypad_update/419/419



From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Peter Bresler via Groups.Io <PABresler@...>
Sent: Tuesday, January 21, 2020 5:20 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: [ap-gto] New Keypad Software
 
I fairly recently received an email announcing new keypad software. Unfortunately it appears that my keypad is too old to accept it. Can someone please redirect me to this information?


New Keypad Software

Peter Bresler
 

I fairly recently received an email announcing new keypad software. Unfortunately it appears that my keypad is too old to accept it. Can someone please redirect me to this information?


Re: Rotating pier adapter #Polar_Alignment

Steven Panish
 

I may have missed what you have for a pier, but I have the RPA installed on a 10" schedule 20 pipe.   The RPA and other 10" adapters are held to a pier with 6 screws, which go through the pier pipe.  (Mine is a bit more complex but that's how the RPA is meant to be attached).  There are mechanical drawings on the AP website.  If you look at the 10" portable piers you can see how the holes are done.  This would allow you to rotate the RPA in 60 deg increments, not quite enough to get the 14 degree fine adjustment in the correct range.  

You could also buy one of the 10" portable piers which would likely work well if the trailer is big enough.   Very nice product and you can rotate as desired.  (I have an extra if you are interested).  

Steve


Re: Rotating pier adapter #Polar_Alignment

Michael Hambrick <mike.hambrick@...>
 

Hi Jom
You would probably need a combination of flat surface adapters and / or flat pier plates. The rotary tables are slotted, so it should be pretty straightforward to attach the mount base to the rotary table. The base of the rotary tables typically have two to four slotted lugs for bolting them to the machine table. You would probably have to modify (drill & tap) one of the flat surface adapters that fits your pier.

There are probably cheaper ways to do this.


Best Regards

Michael Hambrick
ARLANXEO
TSR Global Manufacturing Support
PO Box 2000
Orange, TX 77631-2000
Phone: +1 (409) 882-2799
email: mike.hambrick@...


Re: Rotating pier adapter #Polar_Alignment

thefamily90 Phillips
 

They look pretty cool. But, how would you attach one to a pier and AP GOTO
900 or 1200 mount?

Jim


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Michael Hambrick via Groups.Io <mike.hambrick@...>
Sent: Tuesday, January 21, 2020 8:35:36 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Rotating pier adapter #Polar_Alignment
 
You might try looking on eBay. I accumulated a pretty good collection of machine tooling from eBay over the years. This was back when they did real auctions and not the "buy it now" system that they have gone to.

In most cases, the old American made tooling is far far better than anything on the market today. Rotary tables have a crank wheel that turns a worm gear to rotate the table. The good ones have a 90:1 ratio (90 turns of the crank to achieve 360 degrees rotation) with a properly graduated crank wheel these rotary tables are accurate to within a few arc minutes.

Palmgren used to make some really nice rotary tables. They used to be made in the US, but like everyone else they moved their manufacturing to China. The quality has suffered because of it.
Another good brand is Troyke. They are considered the Cadillac of rotary tables. As far as I know they still make a 9-inch rotary table here in the US, but you will pay dearly for a new one. Every once in a while you can find a used one on eBay for a pretty decent price.


Best Regards

Michael Hambrick
ARLANXEO
TSR Global Manufacturing Support
PO Box 2000
Orange, TX 77631-2000
Phone: +1 (409) 882-2799
email: mike.hambrick@...


Re: Rotating pier adapter #Polar_Alignment

Michael Hambrick <mike.hambrick@...>
 

You might try looking on eBay. I accumulated a pretty good collection of machine tooling from eBay over the years. This was back when they did real auctions and not the "buy it now" system that they have gone to.

In most cases, the old American made tooling is far far better than anything on the market today. Rotary tables have a crank wheel that turns a worm gear to rotate the table. The good ones have a 90:1 ratio (90 turns of the crank to achieve 360 degrees rotation) with a properly graduated crank wheel these rotary tables are accurate to within a few arc minutes.

Palmgren used to make some really nice rotary tables. They used to be made in the US, but like everyone else they moved their manufacturing to China. The quality has suffered because of it.
Another good brand is Troyke. They are considered the Cadillac of rotary tables. As far as I know they still make a 9-inch rotary table here in the US, but you will pay dearly for a new one. Every once in a while you can find a used one on eBay for a pretty decent price.


Best Regards

Michael Hambrick
ARLANXEO
TSR Global Manufacturing Support
PO Box 2000
Orange, TX 77631-2000
Phone: +1 (409) 882-2799
email: mike.hambrick@...


Re: Backlash correction during calibration

Suresh Mohan
 

Thank you for the detailed response Rolando
Regards 
Suresh

On 21-Jan-2020, at 12:35 AM, uncarollo2 <chris1011@...> via Groups.Io <chris1011@...> wrote:

If you can't feel any movement when you wiggle the scope or the counterweight shaft, then the worm gears in both axes are in full mesh, and you don't want to further improve upon that.

There is about 1/2 second reversal delay in the Dec gearbox. It cannot be made any less than that. This delay is at 1x Sidereal guide speed setting. If you try to do the calibration at 0.5x then it will take twice as long, and at 0.25x it will take 4 times as long. That is the reason we recommend using 1x guide rate for calibration and also for guiding because the mount will be much more responsive at that setting.

In the guider program you can set the aggressiveness to something less than 100%. If you set it to 50% it will take twice as long for the guide star to return to the zero line or twice as long to do a Dec reversal. At 25% it takes 4 times as long. You have to remember that when you dial in a low value of aggressiveness.

I assume you use PHD2 for guiding. So, the proper setup of the calibration and guiding parameters is essential. I would suggest that for calibration that you set the time for each move at a high enough level so that the mount will be able to reverse quickly with just 1 or 2 pulses. I would set the pulse length to at least 500msec or even 1000msec. There is no reason to set it below that time frame. You can also specify a small amount of backlash compensation, and PHD2 is quite good at applying it properly without causing overshoot and oscillations.

After setting the parameters for calibration and guiding, my suggestion is to run Guiding Assistant and set the backlash and all the other settings per the suggestions. Don't try to guide faster than once per second, and in fact a good compromise is to do 3 second guide intervals. If you want, you can take a 1 second exposure of the guide star and dial in a 3 second or longer delay before the next guide exposure. This will prevent hunting back and forth and allow the mount time to settle after each guide move.

Doing the right settings for accurate guiding is a bit of an art, but once you have a good set of parameters, the mount should respond in a proper manner and give you good guiding results.

Rolando


Re: USB (or Serial) vs Ethernet: Which is better or more reliable?

Christopher Erickson
 

Here is my reliability list, FWIW. Starting with the most reliable and going down to the least reliable. 

1. Real RS-232 cable between two real RS-232 ports. No USB involved. Greatest weakness of this connection is big connectors getting hit and damaged or broken.

2. Ethernet cable directly between CP4/CP5 and PC or a LAN with PC connected. Greatest weakness of this connection is misconfigurations.

3. USB between CP4/CP5 and PC. Greatest weakness of this connection is USB connectors.

4. Serial from CP4/CP5 to a Serial-USB dongle then USB into a PC.  Greatest weakness of this connection is USB connectors and additional external complexity.

5. WiFi between CP4/CP5 and PC/tablet/Smartphone. Greatest weakness of this connection is wireless itself, followed by misconfigurations.


On Mon, Jan 20, 2020 at 8:07 AM r1300rs via Groups.Io <cardiofuse=mac.com@groups.io> wrote:
If one is using a laptop can the mount connect to the laptop's ethernet port and a 2nd network for internet access be used with a USB-ethernet adapter?
Of course the mount ethernet would have no gateway assigned.


Re: Rotating pier adapter #Polar_Alignment

fl.lusen
 

Rick,

 

Aside from astronomy I am also a hobby machinist.  Years ago I helped a fellow that built an observatory in a surplus ambulance.  He had the same problem.  What I suggested to him and he did implement was to get an 8” or 10” machinists Horizontal rotary table.   https://en.wikipedia.org/wiki/Rotary_table  They rotate 360 degrees and lock down solidly enough to overcome the forces produced by the cutting action of a milling machine cutter.  Extremely rigid.

 

That may be an option for you.  I would stay away from the Chinese made.  Go with Japanese, Taiwanese, or eastern Europe.

 

Fred

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of r1300rs via Groups.Io
Sent: Monday, January 20, 2020 11:20 AM
To: main@ap-gto.groups.io
Subject: [ap-gto] Rotating pier adapter #Polar_Alignment

 

I'm thinking of placing an AP1600/1100 in my portable observatory trailer.  Since it moves around field to field; it can't be parked precisely so that the pier is facing North for Polar Alignment.  Does the RPA allow the base of the mount to be "swiveled" 360 degrees and then locked down?

I've had several in the past but can't remember if this is a feature of the RPA or if it just moves a short distance.

Rick
cardiofuse observatory

9781 - 9800 of 77737