Date   

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


Re: GTOCP4

vsalfranc@...
 

thank you Rolando for the info.
Vince


Re: Backlash correction during calibration

uncarollo2 <chris1011@aol.com>
 

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


-----Original Message-----
From: Suresh Mohan <drsureshmohan@...>
To: main <main@ap-gto.groups.io>
Sent: Sun, Jan 19, 2020 6:57 pm
Subject: [ap-gto] Backlash correction during calibration


Backlash correction seems to take a long time on my Mach 1 of late and for several steps ( star remains still ) , I don’t find any sloppiness in my mount when I physically try to wiggle it . Would you think the DEC axis is too tight ?
Regards
Suresh



Re: Rotating pier adapter #Polar_Alignment

uncarollo2 <chris1011@aol.com>
 


Does the RPA allow the base of the mount to be "swiveled" 360 degrees and then locked down?
No 360 degree movement. I believe it has about 15 degree freedom of movement.

Rolando


-----Original Message-----
From: r1300rs via Groups.Io <cardiofuse@...>
To: main <main@ap-gto.groups.io>
Sent: Mon, Jan 20, 2020 11:20 am
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


Re: GTOCP4

uncarollo2 <chris1011@aol.com>
 

The autoguiding routines have not changed for the CP4.

Rolando



-----Original Message-----
From: vsalfranc <vsalfranc@...>
To: main <main@ap-gto.groups.io>
Sent: Mon, Jan 20, 2020 10:10 am
Subject: [ap-gto] GTOCP4

Hi,
I am looking to purchase the GTOCP4 but before buying it I wanted to check if that would improve the auto guiding for imaging. My AP1100Gto is performing superbly so I am in 2 mind bout upgrading.
Vince


Re: Mach2 Shipping?

uncarollo2 <chris1011@aol.com>
 


Dose the GTOCP5 require APCC-Pro to run, or can it run with just the V2 driver.
None of our mounts require APCC Pro to run, and that includes the Mach2. The present version of the driver works just fine with the Mach2, it's what I've been using for the past year. In bare bones operation I have my laptop with MaximDL on for image acquisition and guiding,  and perhaps PHD2 for alternate guiding. I can also bring up SkyX using its ASCOM command and it will automatically connect to the Mach2. The ASCOM driver using either MaximDL or SkyX will initialize the mount. Nothing else is required.

In the meantime we are revising the AP ASCOM driver to add some features which are not in the present version of the driver.

Rolando


-----Original Message-----
From: bob <skybob727@...>
To: main <main@ap-gto.groups.io>
Sent: Mon, Jan 20, 2020 10:09 am
Subject: Re: [ap-gto] Mach2 Shipping?

Since the Mach2 has not shipped as of yet, this question is more for Rolando or anyone at AP. I do not plan to use the Mach2 in an observatory, just occasionally at home and in the field. On the website in the “What’s Included” it shows that the APCC-Pro is included with the mount. Dose the GTOCP5 require APCC-Pro to run, or can it run with just the V2 driver. I have noticed that even the current V2 v5.20.09 driver dose not show a GTOCP5 option for a mount controller.

Bob
 


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

r1300rs
 

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: 1) Starting with CW up; 2) Slewing to a target, landing CW up

uncarollo2 <chris1011@aol.com>
 

If you do a meridian delay the mount will go to the object with counterweight up and any other object nearby.

Rolando



-----Original Message-----
From: Richard Spencer via Groups.Io <rgspencer@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sun, Jan 19, 2020 6:35 pm
Subject: [ap-gto] 1) Starting with CW up; 2) Slewing to a target, landing CW up

All,

AP 1100 mount:

It's often useful to start an imaging run with CW up to avoid an eventual meridian flip.  Currently, to do that, I slew to the target with the usual default of landing there with CW down, and then do a meridian flip, re-center, and start to image.  

1) But is there a way to tell the mount that I would like it to point to my target in the CW up position?  This would streamline things quite a bit.

2) Related: Once I'm near my object with CW up, I may want to slew to a nearby object to e.g. re-synch.  The mount again does this according to its default, landing there with CW down--which is not helpful.  So, a short slew of a couple degrees completely reverses the mount, and is also not what I want--I want to re-synch with CW up.  

2 1/2)  Essentially same at 2):  Likewise, I'd like to slew initially to a star near my target, landing there with CW up, synch, and then slew to the target, keeping CW up.  I can't figure out how to do that; the mount always wants to land CW down when slewing.

There are two ways the AP1100 can point to an object, and it seems that there should be a simple way to tell the mount that I want to choose the one with CW up.

Any help would be much appreciated!

Thank you,
Rick Spencer
Elkton, MD