Date   

Re: Comet Neowise coma detail

christian viladrich
 

This is splendid. The spiraling jet is very neat !

Christian

Le 29/07/2020 à 20:00, uncarollo2 <chris1011@...> via groups.io a écrit :
Hi,

I just uploaded my last image on Astrobin which shows the coma and jets in detail. The comet was definitely rotating during my 2 hour session. I have a number of frames from beginning to end that shows the jets expanding and the streamers moving behind the comet, however I have not figured out how to present a moving image with these frames. So this image is a still picture about 1/3 of the way thru the session. Luminance is a stack of 8 x 30 seconds with RGB colors added of 10x 30 sec for each filter.

The image is noisy due to the short integration of the exposure and the amount of processing (digital development in MaximDL) required to bring out the very subtle jets as they rotate around the nucleus.


Rolando


Re: APCC Pro Temperature monitoring

Dean Jacobsen
 

It is mostly all magic to me...

However, that driver is something that I am going to try out next trip out to the observatory.  The Sky Alert is a device on our ethernet network so I think that you have me pointed in the right direction.

Thank you so much.
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Renishaw encoders

BJStrom@...
 

Thanks for the information Roland. A couple questions I have been curious about. What exactly makes the encoders "extended temperature" and does this sacrifice performance or longevity in any way compared to the non-extended temperature encoders? Are different parts used? Thanks in advance.


Re: APCC Pro Temperature monitoring

 

I don't think there's any magic to that if you're using boltwood.

we use this driver:


 


On Wed, Jul 29, 2020 at 1:01 PM Dean Jacobsen <deanjacobsen@...> wrote:
Thanks Brian.

I started looking around the Sky Alert documentation.  The device puts out weather data files confirming to the Boltwood II standard.  There is an "ASCOM Safety Monitor" driver for the Sky Alert that I can download and install.   I don't see anything yet in the Sky Alert documentation about an ASCOM ObservingConditions driver. So I may be out of luck for now.
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 



--
Brian 



Brian Valente


Re: Questions about how to test my Mach2 indoors #Mach2GTO

Dean Jacobsen
 

It is good to hear that you have the plate solving working now.
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: APCC Pro Temperature monitoring

Dean Jacobsen
 

Thanks Brian.

I started looking around the Sky Alert documentation.  The device puts out weather data files confirming to the Boltwood II standard.  There is an "ASCOM Safety Monitor" driver for the Sky Alert that I can download and install.   I don't see anything yet in the Sky Alert documentation about an ASCOM ObservingConditions driver. So I may be out of luck for now.
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Comet Neowise coma detail

Roland Christen
 

Hi,

I just uploaded my last image on Astrobin which shows the coma and jets in detail. The comet was definitely rotating during my 2 hour session. I have a number of frames from beginning to end that shows the jets expanding and the streamers moving behind the comet, however I have not figured out how to present a moving image with these frames. So this image is a still picture about 1/3 of the way thru the session. Luminance is a stack of 8 x 30 seconds with RGB colors added of 10x 30 sec for each filter.

The image is noisy due to the short integration of the exposure and the amount of processing (digital development in MaximDL) required to bring out the very subtle jets as they rotate around the nucleus.

https://www.astrobin.com/full/2o1ksc/0/?nc=Uncarollo&real=&mod=

Rolando


Re: Questions about how to test my Mach2 indoors #Mach2GTO

lmbrabec@...
 

Sorry about that!  It was un-guided at 504 mm. I wish I would have saved the image but it was only one when the clouds moved in (darn). Eventually I'll work my way up to trying my C9.25 Edge HD but not for a while.  I was noticing some mirror flop with it even with the mirror locks. All the best, Scott


Re: APCC Pro Temperature monitoring

 

Hi Dean

I believe SkyAlert can write a boltwood conditions file, which can be used by the boltwood observing conditions. 

we do that here, since our MGBox crapped out. our observatory produces this file on a shared server and APCC periodically reads it

image.png

On Wed, Jul 29, 2020 at 12:24 PM Dean Jacobsen <deanjacobsen@...> wrote:
I was just reading about THUM devices in the APCC manual {Pointing Model Tab section].

We actually have a Sky Alert system on the back of the observatory [ https://interactiveastronomy.com/skyalertindex.html ].

Is there any way I can configure APCC Pro to read the temperature and humidity data form the Sky Alert?
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 



--
Brian 



Brian Valente


APCC Pro Temperature monitoring

Dean Jacobsen
 

I was just reading about THUM devices in the APCC manual {Pointing Model Tab section].

We actually have a Sky Alert system on the back of the observatory [ https://interactiveastronomy.com/skyalertindex.html ].

Is there any way I can configure APCC Pro to read the temperature and humidity data form the Sky Alert?
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: setting limits for encoders

 

well, so far  that makes one of us lol


On Wed, Jul 29, 2020 at 11:57 AM Dean Jacobsen <deanjacobsen@...> wrote:
Great, setting the limits is easy to do.  Even I was able to figure it out unassisted.  ;-)
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 



--
Brian 



Brian Valente


Re: setting limits for encoders

Dean Jacobsen
 

Great, setting the limits is easy to do.  Even I was able to figure it out unassisted.  ;-)
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: setting limits for encoders

 

yes that's great, thanks Dean



On Wed, Jul 29, 2020 at 11:48 AM Dean Jacobsen <deanjacobsen@...> wrote:
Hi Brian,

The on-line APCC manual has information on setting up the horizon tracking limits and meridian tracking limits.  Is that what you are looking for?

https://www.siriusimaging.com/Help/APCC/index.html
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 



--
Brian 



Brian Valente


Re: setting limits for encoders

Dean Jacobsen
 

Hi Brian,

The on-line APCC manual has information on setting up the horizon tracking limits and meridian tracking limits.  Is that what you are looking for?

https://www.siriusimaging.com/Help/APCC/index.html
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


setting limits for encoders

 

Is there some documentation or tips on how to set limits for encoder mounts in APCC? such as our AP1600

i clicked on the "?" but it did not bring up any documentation



--
Brian 



Brian Valente


Renishaw encoders

Roland Christen
 

As is by now well known, we use Renishaw encoders in our mounts. Specifically we use the RESA Absolute Encoder system in order to achieve sub-arc sec tracking and high precision pointing. Renishaw makes a number of encoder systems, some inexpensive and not of the high accuracy that we wanted in our mounts. Not all Renishaw encoders have the level of performance that is needed in a truly precision mount.

We chose the RESA system specifically because it is the only encoder that produces sub-arc sec accuracy, has vanishingly small sub-divisional errors (SDE), has self contained electronics (BISS protocol), and is pretty much immune to dust, dirt and other environmental effects. It also allows thru axis wiring thanks to the large hollow ring opening.

Why a RESA Absolute Encoder, and what does it buy? The accuracy is in 2 parts. The system uses a patented readhead that produces a very accurate sub-arc sec signal of absolute position and tracking rate. It does so without the interpolation errors (SDE) that plague almost every other precision encoder that we have tested over the years. With other encoder systems the SDE is large enough to impact the sidereal tracking rate which causes the mount to bobble back and forth several arc seconds at a fast rate that is difficult to guide out. Secondly, the accuracy of position over the entire 360 degrees is very high, and any small errors can be mapped and compensated. This can only be done with an absolute encoder, and cannot be easily done with a relative encoder.

The Renishaw RESA Absolute Encoder system is comprised of two parts: the Ring and the Readhead.

RESA ring:
The ring has a special barcode that is interpolated to 2^26 address points (67,108,864 discrete points), which means 52 address points for each arc second of the axis rotation angle. This allows very fine control of the rotation rate of the axis to keep the tracking rate constant at sub-arc second levels. The CP4/5 use a control loop that monitors and adjusts the position and tracking rate every 5 milliseconds. The control loop responds quickly to any errors that occur on the shafts so that the mount points and tracks exactly as required to compensate for a moving object in the sky.

The scale is etched on the periphery of a stainless steel ring instead of a glass reticle. Each ring comes with a certificate showing the absolute error of the ring along the 360 degree periphery, measured at Renishaw with precision metrology. The ring error is mapped, stored in the CP controller and becomes part of the mount's control loop system. For the Mach2, the accuracy of the Renishaw RESA ring is less than 1 arc sec per hour over the entire 360 degree rotation angle of the RA axis.

RESA Readhead:
The heart of the encoder system is the patented readhead which reads the engraved barcode on the ring and converts it to one of the millions of individual address points. The electronics are embedded in the readhead and require no further interpolation in our CP controllers. The readhead is easy to replace and requires no special calibration of any kind to achieve the proper accuracy.

Because it is an Absolute Encoder, each point can be mapped and stored in memory, very much like a long duration PE curve that is slowly played back over the entire 24 hour rotation period. This allows the CP controller to always know what each gear angle is at any time and where the mount is pointing. By definition, the mount is always home. No extra homing sensor is needed, the encoder itself is a 360 degree homing sensor. As soon as the power is applied, the encoder sends its position information to the CP controller which immediately establishes the orientation of the mount. In the Mach2 mount it doesn't matter whether you have moved the mount electronically or manually via the clutches - the encoders always keep track of the position of the axes.

In summary:
The Renishaw RESA encoders provide high tracking and pointing accuracy without introducing their own interpolation errors.
The Absolute reading allows the mount controller to always know the exact shaft angles, whether they are moving manually or via the motors.
The encoder accuracy is enhanced by mapping each of the address points over the entire 360 degree rotation.
The readhead and rings are robust and not affected by dust, dirt or other environmental effects.
The encoders makes it possible for the mount to track stars without guiding, to a very high level of accuracy.

Roland Christen
Astro-Physics Inc.



Re: Questions about how to test my Mach2 indoors #Mach2GTO

Larry Phillips
 

Scott, was that with or without guiding?

Larry


Re: APPC refraction correction question

Craig Young
 

The problem appears to be related to the Offset Error - Hour Angle term in the model.  If this term is checked AND refraction correction unchecked then the model term value in the box is -170.12.  If I then enable (check) refraction correction the model term now changes to 187985 which throws the tracking correction way off.  But if I now uncheck the model term then the refraction correction appears to work much better.  Not sure if it is right though given that I have removed this model term.
Craig


Re: Questions about how to test my Mach2 indoors #Mach2GTO

Charles Thompson
 

This is great news Roland!  Thank you for the update. 





Thanks,
Charles

Sent from mobile device.


-------- Original message --------
From: "uncarollo2 <chris1011@...> via groups.io" <chris1011@...>
Date: 7/29/20 10:48 AM (GMT-06:00)
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Questions about how to test my Mach2 indoors #Mach2GTO

Thank you for your post. It makes all the late night work that we all have done worthwhile. Even though we had to stop normal production here for several months, our crew stepped up to the plate and did their jobs at home. And that includes putting together the sub-assemblies that I was then able to assemble here to produce the first batch of Mach2 mounts that went out this summer.

Our crew is now fully back together doing full time production of our mount and telescope products. We have added several new machinists in our machining department. We have purchased several large pieces of CNC equipment to facilitate making the complicated machined parts of the Mach2 and our larger mounts. We also just hired a servo specialist who has worked for us for many years in a part time capacity. All of this will allow us to grow our mount business.

Roland Christen (aka Rolando)
Astro-Physics Inc.



-----Original Message-----
To: main@ap-gto.groups.io
Sent: Wed, Jul 29, 2020 10:22 am
Subject: Re: [ap-gto] Questions about how to test my Mach2 indoors #Mach2GTO

Marcelo:  Congrats on your Mach2.  I just did my first APPM run (small model of 32 pts) a couple of nights ago with my Mach2 and did a 10 minute image before the clouds rolled in. The stars were pin point perfect!  This mount is a work of art and the software is amazing.  The support from AP and Ray is second to none, along with the good folks on this forum. Ray helped my out on getting going with APPM and I can't say enough about his suppor.!  All the best, Scott


Re: Parking Mach2 with couter weight up

Roland Christen
 

Hello Konstantin,

We are working on a solution for your issue. The person who is most knowledgeable is unfortunately on a short vacation, but will be back next Monday. We will get this sorted out as soon as he is back.

Roland

-----Original Message-----
From: Konstantin von Poschinger <KPoschinger@...>
To: main@ap-gto.groups.io
Sent: Wed, Jul 29, 2020 10:39 am
Subject: Re: [ap-gto] Parking Mach2 with couter weight up

Hello Roland,

I have tested the false parking on both side east and west. The mount is tracking normal when I give the park command. In the moment the mount is stored for a travel to south Germany. I can send you images when I have arrived there. 

Grüsse

Konstantin


Konstantin v. Poschinger


Hammerichstr. 5
22605 Hamburg
040/8805747
0171/1983476

Am 27.07.2020 um 19:36 schrieb uncarollo2 <chris1011@...> via groups.io <chris1011@...>:


In order for me here to create your situation we need to know which way the scope is pointing (E or W), which way you have the Meridian Delay, what program you are using for pointing, and any other information so I can set my scope/mount in the same orientation. A quick picture would be helpful also.

I use my mount all the time with scope under the mount and have never prevented from moving unless I have set the Mach2 internal limits to be ON. I park it with the keypad and also with the ASCOM driver. Always works.

I will forward this to Ray Gralack to see if he can figure out why APCC will not park the mount. One thing you can check is to see what color is the light on the CP5 when it won't move. Also check the ASCOM driver to see if it shows Sidereal Tracking.

Rolando



-----Original Message-----
From: Konstantin von Poschinger <KPoschinger@...>
To: main@ap-gto.groups.io
Sent: Mon, Jul 27, 2020 12:20 pm
Subject: Re: [ap-gto] Parking Mach2 with couter weight up

Hi Roland,

I have only done that what I wrote. I sit in the cellar and are3 setting up the Meridian delay.

Initialize the mount. I have tested with a perking movement, that all is fine with the position. From that point I did what I have written in my last mail. 

I move the mount in a cw up position in the middle of the allowed area! 
The mount is tracing normal! 
From there it is not possible to slew direct to a park position. 
In the moment I give the park order to Park isn Park position 2, the mount parked at that cw up postion and the motors stop.
I have done that a lots of time with different sides of pear and different park positions. 
After unparking the mount I send it to CW down position. From there the parking to Park 2 Position is working as it should.

I hope you understand now what I have done.
In the Logfile I send is all that viewable.

Greetings

Konstantin v. Poschinger

Hammerichstr. 5
22605 Hamburg
040/8805747
0171 1983476

Am 27.07.2020 um 17:20 schrieb uncarollo2 <chris1011@...> via groups.io <chris1011@...>:

There is not enough information in any of your posts for us to determine what you are doing and how you are doing this. So I can only assume that you have gone beyond the limits that you have set and the mount is in a Park mode with motors de-energized. In that condition it will not slew until you unpark it.

Rolando



-----Original Message-----
From: Konstantin von Poschinger <KPoschinger@...>
To: main@ap-gto.groups.io
Sent: Sun, Jul 26, 2020 10:28 am
Subject: Re: [ap-gto] Parking Mach2 with couter weight up

No!
I move the mount in a cw up position in the middle of the allowed area! 
From there it is not possible to slew direct to a park position. 
I have done that a lots of time with different sides of pear and different park positions. 

Grüsse

Konstantin
Konstantin v. Poschinger


Hammerichstr. 5
22605 Hamburg
040/8805747
0171/1983476

Am 26.07.2020 um 17:03 schrieb uncarollo2 <chris1011@...> via groups.io <chris1011@...>:


You probably reached the limits and the mount self-parked. Then you must unpark before you can issue another GoTo.
When you have limits turned on and mount tracks beyond the meridian, cwt up, then it goes into the limits and parks.

Rolando



-----Original Message-----
From: Konstantin von Poschinger <KPoschinger@...>
To: main@ap-gto.groups.io
Sent: Sat, Jul 25, 2020 5:09 pm
Subject: Re: [ap-gto] Parking Mach2 with couter weight up

Hi Roland,

you are right, when you reach the limits. But I only slew to a allowed cw up poisition.
Now I want to park in position 2. That is not working as I described.

Konstantin


Konstantin v. Poschinger

Hammerichstr. 5
22605 Hamburg
040/8805747
0171 1983476

Am 25.07.2020 um 23:46 schrieb uncarollo2 <chris1011@...> via groups.io <chris1011@...>:

That is correct. The mount automatically parks at that position when you reach the limit. The motors shut off so that it does not continue to track and cause telescope to hit the pier and cause damage to the scope. This is the feature that people have been asking or. When the telescope is in Park mode, you need to send an unpark command before it will re-energize and move.

Rolando



-----Original Message-----
From: Konstantin von Poschinger <KPoschinger@...>
To: main@ap-gto.groups.io
Sent: Sat, Jul 25, 2020 3:14 pm
Subject: Re: [ap-gto] Parking Mach2 with couter weight up

Hi,

I have a look at the log. the error seems to be in the row 0002539 a westlimit has been triggered. and after that the mount is parked at that position. 

Konstantin

 
Konstantin v. Poschinger

Hammerichstr. 5
22605 Hamburg
040/8805747
0171 1983476

Am 25.07.2020 um 22:05 schrieb Konstantin von Poschinger <KPoschinger@...>:

Hi Ray,

I did nother short run with the failure. I only went to a cw up and then did a park command. After that it set the mount to park at the cw up position and after unparking and slewing to a cw down I have parked correctly. In this short log I hope you can find what you want.

Konstantin


Konstantin v. Poschinger

Hammerichstr. 5
22605 Hamburg
040/8805747

0171 1983476


Am 25.07.2020 um 21:36 schrieb Konstantin von Poschinger <KPoschinger@...>:

Hi Ray,

I could park after I slew in a counterweight up position. In the time before that it didn’t worked. I did this more than one time.

Konstantin


Konstantin v. Poschinger

Hammerichstr. 5
22605 Hamburg
040/8805747
0171 1983476

Am 25.07.2020 um 20:28 schrieb Ray Gralak <groups3@...>:

There are several parks in your log file. Can you be more specific on the time at which this failed park request occurred?

I looked at the last park and it looks like it worked fine.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
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 Konstantin von Poschinger
Sent: Saturday, July 25, 2020 9:29 AM
To: main@ap-gto.groups.io
Subject: [ap-gto] Parking Mach2 with couter weight up

Hello Ray,

I just tested my new mount. While setting up the meridian delay position I found a strange thing. When the counter
weight shaft is up and I gave the order to park APCC didn’t move the mount. I send you the log files. Perhaps I
have done something wrong in the settings.
I think I should report it to you.

Greetings

Konstantin

Konstantin v. Poschinger

Hammerichstr. 5
22605 Hamburg
040/8805747
0171 1983476







<AscomZip-KPoschinger-2020-07-25-215733.zip>



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