Date   

Re: GTOCP4

vsalfranc@...
 

thank you Rolando for the info.
Vince


Re: Backlash correction during calibration

Roland Christen
 

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

Roland Christen
 


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

Roland Christen
 

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?

Roland Christen
 


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

Roland Christen
 

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


Rotating pier adapter #Polar_Alignment

r1300rs
 

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: Mach2 Shipping?

George
 

Bob,

 

Yes, it will be able to be run by using just the V2 driver and third party software.   We will release the required V2 update at that time.  

 

Regards,

 

George

 

George Whitney

Astro-Physics, Inc.

Phone:  815-282-1513

Email:  george@...

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of bob
Sent: Sunday, January 19, 2020 10:52 AM
To: main@ap-gto.groups.io
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

 


GTOCP4

vsalfranc@...
 

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?

bob
 

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

Geof Lewis
 

Hi Richard,
I do this all the time with my 12 year old AP1200GTO CP3, by setting the meridian delay in the V2 driver - note I do not have APCC. A positive number moves the 'meridian' east (earlier) and a negative number moves the 'meridian' west, i.e. delays the flip, which I also use when imaging planets if they are past the meridian as that is a more comfortable configuration for viewing and imaging in my observatory.
For me typically a 2 hour delay doesn't risk any mount collisions, but YMMV so you need to check that out. For some targets I've moved the meridian delay forward 3, or even 4 hours. As the delay is set in the driver any targets that you slew to within the user set delay of the true meridian will not invoke a flip that you do not want.
Good luck,

Geof


On 20 Jan 2020, at 00:35, Richard Spencer via Groups.Io <rgspencer@...> wrote:

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


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

Ray Gralak
 

Ray, A-P folks, please clarify this if I am unclear. I do not know if starting CW up is possible without APCC.
Sure, you can set a meridian delay value in the driver. APCC allows you to configure a dynamic meridian delay value that changes with declination and pier 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 Worsel via Groups.Io
Sent: Sunday, January 19, 2020 7:22 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] 1) Starting with CW up; 2) Slewing to a target, landing CW up

Rick:

Do you have APCC...either Standard or Pro? You can change the meridian limits in either to move the point of flip
east or west as needed. Typically, we want to start CW up with the scope pointed east but avoid flip entirely. The
process is:

Start APCC. Connect your equipment.
Select Meridian tab
Set the meridian Delay to a POSITIVE value such that the Delay is farther EAST than the target object. You can
see the effect on the globe in the Telescope section of this tab.
Slew to your target
The scope should end up CW up and never execute a flip even when the object sets in the west.

Ray, A-P folks, please clarify this if I am unclear. I do not know if starting CW up is possible without APCC.

Bryan

Bryan


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

Worsel
 

Rick:

Do you have APCC...either Standard or Pro?  You can change the meridian limits in either to move the point of flip east or west as needed.  Typically, we want to start CW up with the scope pointed east but avoid flip entirely.  The process is:

Start APCC. Connect your equipment.
Select Meridian tab
Set the meridian Delay to a POSITIVE value such that the Delay is farther EAST than the target object.  You can see the effect on the globe in the Telescope section of this tab.
Slew to your target
The scope should end up CW up and never execute a flip even when the object sets in the west.

Ray, A-P folks, please clarify this if I am unclear.  I do not know if starting CW up is possible without APCC.

Bryan

Bryan


Backlash correction during calibration

Suresh Mohan
 

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


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

Richard Spencer
 

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


Re: Mach2 Shipping?

Dean Jacobsen
 

Hopefully northern Illinois is in for a run of clear nights!


Actual view through the RAPAS

Henry Kwok
 

Can some kind soul please post an actual image of the view through the RAPAS?
How much more FOV is there beyond the outer ring for sig oct?
All the images of the reticle show the sig oct ring at the margin of the FOV
The data sheet says the RAPAS has 6 deg FOV - which means there should be quite a bit more (like 2 degree more) FOV beyond the sig oct ring?
I am just trying to figure out how much of the sig oct asterism is visible in the RAPAS for Southern Hemisphere alignment.
I don't think I will ever identify sig oct if I cannot see the whole asterism in the FOV.
If I can see the asterism then it may be possible.
Thanks!


Re: Mach2 Shipping?

 

Uh oh. See what you've done?!


On Thu, Jan 16, 2020, 3:06 PM uncarollo2 <chris1011@...> via Groups.Io <chris1011=aol.com@groups.io> wrote:
We may do that Smile

Rolando



-----Original Message-----
From: Bill Long <bill@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Thu, Jan 16, 2020 4:57 pm
Subject: Re: [ap-gto] Mach2 Shipping?

Let me know if you need help testing. (kidding... 🙂)


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of uncarollo2 <chris1011@...> via Groups.Io <chris1011=aol.com@groups.io>
Sent: Thursday, January 16, 2020 10:20 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Mach2 Shipping?
 
First batch is in testing, we will update as soon as they are packed and ready for shipping. We see the light at the end of the rainbow.

Rolando



-----Original Message-----
From: Larry Phillips <llp41astro@...>
To: main <main@ap-gto.groups.io>
Sent: Thu, Jan 16, 2020 7:56 am
Subject: [ap-gto] Mach2 Shipping?

Dare I ask, have any Mach2s been shipped yet?

Larry


Re: Mach2 Shipping?

Wayne Hixson
 

I’m here for y’all! I am good at finding obscure ways of breaking things. 


On Jan 16, 2020, at 3:30 PM, Dominique Durand via Groups.Io <dom33.durand@...> wrote:


I would love to test too  ... in my home 😉 

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