Date   

APCC shows Altitude at 0 in Park 3

Wayne Hixson
 

Altitude at park 3 should be 47 degrees. Site is correct. This happened before, not sure what the problem is. 


Wayne


Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

Don Anderson
 

Barry's is bigger than oursEmoji

Don Anderson


On Friday, March 12, 2021, 07:30:02 p.m. MST, Joe Zeglinski <j.zeglinski@...> wrote:


Congrats Barry,
 
...  on finding that huge Pickett. Years ago, I was looking for one as well, and finally gave up. Settled for finding the Electrical Engineering Pickett model instead.
Now, seeing yours,   I may resume that search.
 
Joe


Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

Don Anderson
 

Wow! Awesome Barry. How heavy is it?  Mine is a Hughes-Owens Bamboo with glass window in the slide. It is in as good a shape as when I bought it in 1969.

Don Anderson


On Friday, March 12, 2021, 07:20:52 p.m. MST, Barry Megdal <bmegdal@...> wrote:


Yes – that is a 6-foot slide rule on the wall.  Couldn’t resist buying it years ago at a garage sale.  These used to hang on the blackboard in my high school chemistry class so they could teach us how to use them.

 

And my new Mach2 in the foreground just to make the photo appropriate for this forum J

 

 

Dr. Barry Megdal

 

President

Shb Instruments, Inc.

19215 Parthenia St.  Suite A

Northridge, CA 91324

www.shbinstruments.com

(818) 773-2000  (818)773-2005 fax

bmegdal@...

 

Faculty (retired)

Dept. of Electrical Engineering

Caltech

 


Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

Joe Zeglinski
 

Congrats Barry,
 
...  on finding that huge Pickett. Years ago, I was looking for one as well, and finally gave up. Settled for finding the Electrical Engineering Pickett model instead.
Now, seeing yours,   I may resume that search.
 
Joe


Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

Barry Megdal
 

Yes – that is a 6-foot slide rule on the wall.  Couldn’t resist buying it years ago at a garage sale.  These used to hang on the blackboard in my high school chemistry class so they could teach us how to use them.

 

And my new Mach2 in the foreground just to make the photo appropriate for this forum J

 

 

Dr. Barry Megdal

 

President

Shb Instruments, Inc.

19215 Parthenia St.  Suite A

Northridge, CA 91324

www.shbinstruments.com

(818) 773-2000  (818)773-2005 fax

bmegdal@...

 

Faculty (retired)

Dept. of Electrical Engineering

Caltech

 


Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

Barry Megdal
 

I used to program the IBM 1620 at the neighboring junior college when I was in high school – unique thing about that machine was that internal storage was in decimal (BCD) rather than standard binary……

 

-        Barry

 

Dr. Barry Megdal

 

President

Shb Instruments, Inc.

19215 Parthenia St.  Suite A

Northridge, CA 91324

www.shbinstruments.com

(818) 773-2000  (818)773-2005 fax

bmegdal@...

 

Faculty (retired)

Dept. of Electrical Engineering

Caltech

 


Re: How to Re-grease a Mach1 with Auto-Adjust Motor Boxes?

Roland Christen
 


one lithium (yellow) and one synthetic (green with MoS2).
MoS2 is very bad for brass or bronze worm gears. The S2 (sulfur) corrodes these metals. Lithium is usually too thin. Try a super lube type grease without sulfur.

Rolando


-----Original Message-----
From: Dominique <d.h.durand@...>
To: main@ap-gto.groups.io
Sent: Fri, Mar 12, 2021 5:18 pm
Subject: Re: [ap-gto] How to Re-grease a Mach1 with Auto-Adjust Motor Boxes?

Hi,
With my Mach2 in my observatory and travel restrictions, my 2011 Mach1 has been sleep for a few months, so, reading your discussions, it made me want and courage to revisit it. I already had a little control on the lubrication side 4 or 5 years ago but not completely and I believe only on the RA axis. I carefully watched the linked videos / photos to check the cleaning and regreasing phases to be done ... and I attacked the disassembly, separation of the 2 axes and treatment of the RA axis to begin with. I am not in the "extreme cold" zone and I have 2 types of grease at my disposal, one lithium (yellow) and one synthetic (green with MoS2). This evening I cleaned and I let the night pass before doing the lubrication, it remains to know which of the 2 greases it is better to use. On the brake part of the RA axis, which was a bit hard and which I have already cleaned and reassembled, I put a little synthetic grease and that seems to have improved things. So I will see tomorrow morning and based on your advice if necessary. As I had opened and / or dismantled the engine blocks several times, it didn't seem complicated to me ... you have to be careful with the cables.
Clear Skies
Dominique

--
Roland Christen
Astro-Physics


Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

M Hambrick
 

I was in chemical engineering at University of Houston for a couple years, then finished at Texas A&M. At UH we did our Fortran programs on the IBM 360, and punch cards were the only option. When we had finished punching our cards we would hand them over at the I/O desk where they would read them and compile our programs. Three hours later we could pick up the printout to see what the errors were. It was a very tedious process.

At Texas A&M they had built their own main frame. Wilbur they called it, and at that time (early 1980s) the engineering students had the option of using punch cards or desktop terminals. The desktop terminals at A&M were way faster for compiling our programs than the punch cards, but there were lots of problems with Wilbur, and he would crash without warning every couple months. There were many students who lost their 10 X 10 matrix inversion programs (or whatever) when Wilbur crashed and they had to type it in again from scratch. I never gave up using punch cards. 

Mike

 


Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

Jeffrey Wolff
 

We used a Control Data Corp. CDC-6500 with two core processors with 256K of ferrite core memory. The core processors used 60 bit floating point which was pretty good for the 70s. There were 18 peripheral processors that ran the operation system and all the IO. I programmed the OS in Compass which was the assembly language at the time. The peripheral processors used 18 bit words vs 60 bit for the core.

The first couple of years of programming I had batch priority for my programs. It took about 24 hours after reading the punch cards into the queue before we could put up the output jobs printout. Eventually I had interactive access using TTYs or typewriter type terminals with built in printers.

When I went back for my masters almost all my work was down on UNIX systems.


Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

Joe Zeglinski
 

Hi Kent,
 
    I was at UofT ( Electrical Engineering - University of Toronto) 1965-1970 about the same time as you  were in Texas.
They showed me boxes of vacuum tubes in surplus storage,  that the electrical engineering faculty purchased as part of their project to build their own computer, then scrapped everything, when IBM came out with their 7094. Don’t know how far our tube version went.
 
Joe Z.
 

From: Kent Kirkley via groups.io
Sent: Friday, March 12, 2021 5:49 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)
 
Joe

You said "The U of T had the fortune of getting"
Was U of T, Texas or Tenessee?
If Texas what years were you there?
I was there 1965-69 and also used Fortran punched card programs.
And yes, I used a slide rule (2) in high school, both K&E's.

Kent Kirkley
 
 


Re: [ap-ug] Astro-Physics Mach1GTO vs Mach2GTO

thefamily90 Phillips
 

Beautiful mounts! Hey Moose 👋!


From: main@ap-ug.groups.io <main@ap-ug.groups.io> on behalf of Harley Davidson <astrocnc@...>
Sent: Friday, March 12, 2021 6:56:13 PM
To: main@ap-ug.groups.io <main@ap-ug.groups.io>; main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: [ap-ug] Astro-Physics Mach1GTO vs Mach2GTO
 
My buddy Tom's Mach1 and my Mach2 compared.

Astro-Physics Mach1GTO vs Mach2GTO Mount - a comparison
https://www.youtube.com/watch?v=1Hla5MIwYrk


tony


Astro-Physics Mach1GTO vs Mach2GTO

Harley Davidson
 

My buddy Tom's Mach1 and my Mach2 compared.

Astro-Physics Mach1GTO vs Mach2GTO Mount - a comparison
https://www.youtube.com/watch?v=1Hla5MIwYrk


tony


Re: Mach2 - Elongated stars

Bill Long
 

I did have my scope well-balanced in both axis. I guided it for a short while as a test for a 5 min sub (image below) then turned it off and went unguided and noticed the stars were of identical quality, so I went unguided for the evening instead.




From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of yanzhe liu <liuyanzhe@...>
Sent: Friday, March 12, 2021 2:41 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Mach2 - Elongated stars
 
I have been using mach1 and 1100 prior to mach2. I knew I changed mount to mach2 in ascom driver.

Let me try again with balanced DEC, as suggested by Roland, to see if the issue is going away.  

On Thu, Mar 11, 2021 at 7:38 AM Ray Gralak <iogroups@...> wrote:
Yanzhe,

> I am able to run "AP Log Zipper", there are 2 files shown in the app: ap.ini and Setting.apdb, however both were dated
> 12/29/2018. Maybe I did not enable ASCOM log.

Hmmm... that is not the default. Did you happen to use this computer with another A-P mount in the past?

Since it is probably a small file, please attach that zip file to a post. It's worth checking the settings to see if anything stands out as an incorrect setting.

BTW, can you also provide a dropbox or google drive link to one of the single raw FITS images with the elongated stars? It's important that it is an unprocessed image and not a jpeg or stacked with other images.

Thanks,

-Ray

> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
> Sent: Wednesday, March 10, 2021 10:36 PM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] Mach2 - Elongated stars
>
> Ray,
>
> I am able to run "AP Log Zipper", there are 2 files shown in the app: ap.ini and Setting.apdb, however both were dated
> 12/29/2018. Maybe I did not enable ASCOM log.
>
> Yanzhe
>
> On Sun, Mar 7, 2021 at 7:37 PM Ray Gralak <iogroups@...> wrote:
>
>
>       Yanhze,
>
>       > Where is ASCOM driver log? I dont use APCC, I use SGPro.
>
>       The AP V2 ASCOM driver, which you must use with SGPro, comes with a log zipper utility called "AP Log
> Zipper". You should be able to find it from the Windows start menu by typing that name. The utility will grab the log files
> for X number of days in the past. If you can't find it, you probably didn't install it when you installed the AP V2 driver. In
> that case, just reinstall the AP V2 driver and select the option to install it.
>
>       BTW, you can use APCC with SGPro. In fact, it is recommended. An APCC Pro license comes with your
> Mach2 mount, but you must contact A-P to get it.
>
>       -Ray
>
>
>       > -----Original Message-----
>       > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
>       > Sent: Sunday, March 7, 2021 4:19 PM
>       > To: main@ap-gto.groups.io
>       > Subject: Re: [ap-gto] Mach2 - Elongated stars
>       >
>       > Ray,
>       >
>       > Where is ASCOM driver log? I dont use APCC, I use SGPro.
>       >
>       > Yanzhe
>       >
>       > On Sun, Mar 7, 2021 at 10:45 AM Ray Gralak <iogroups@...> wrote:
>       >
>       >
>       >       Hi Yanzhe,
>       >
>       >       Can you zip and post your PHD2 logs, as well as APCC/AP V2 ASCOM driver logs?
>       >
>       >       There might be something useful there.
>       >
>       >       -Ray
>       >
>       >       > -----Original Message-----
>       >       > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
>       >       > Sent: Sunday, March 7, 2021 10:12 AM
>       >       > To: main@ap-gto.groups.io
>       >       > Subject: Re: [ap-gto] Mach2 - Elongated stars
>       >       >
>       >       > Roland,
>       >       >
>       >       > I will check my mount serial number later as I just packed everything due to rain forecast.
>       >       >
>       >       > My camera's orientation was 0/180 degree, so I assume top to bottom elongation would be DEC.
>       >       >
>       >       > I dont have any picture of my setup, I just tore it down since it will be rainy this week. My setup is
>       >       > FSQ106+OAG+16803, image scale is 3.5".
>       >       > I was imaging Rosetta Nebula, after it was just past meridian for 2-3 hours.
>       >       >
>       >       > I used PHD2 drift for PA, it reported <5' PA error, I am waiting for polemaster adapter so I can confirm I
> get
>       > good PA
>       >       > next time.
>       >       >
>       >       > DEC was out of balance because my setup was rear end heavy, if it was in balance position then I
> could
>       > not rotate
>       >       > my CCD in all directions. My guess is that the DEC balance was off by less than 1lb. In the next test, I
> can
>       > balance
>       >       > DEC to see if the issue still exists.
>       >       >
>       >       > My suspicion is that if DEC balance is off, then DEC might creep under gravity, even PA is perfect. So
> you
>       > might
>       >       > see DEC continually drift  then gets corrected by PHD2 periodically.
>       >       >
>       >       > Yanzhe
>       >       >
>       >       > On Sun, Mar 7, 2021 at 9:35 AM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
>       >       >
>       >       >
>       >       >       Couple of questions:
>       >       >
>       >       >
>       >       >       1 - what's the mount's serial number
>       >       >       2 - which axis is the elongation
>       >       >       3 - which direction was the scope pointing (RA-Dec)
>       >       >       4 - what scope and focal length or what is the arc sec per pixel.
>       >       >       5 - do you have a picture of your setup?
>       >       >
>       >       >
>       >       >
>       >       >       One comment about balance - it should be easy for you to completely balance the scope with the
>       > clutches
>       >       > loose. Can you estimate how many lb out of balance your scope is in Dec? Normally i would not think
> this
>       > would
>       >       > have any effect, but doesn't hurt to check this.
>       >       >
>       >       >
>       >       >
>       >       >       Roland Christen
>       >       >       Astro-Physics Inc.
>       >       >
>       >       >
>       >       >
>       >       >
>       >       >       -----Original Message-----
>       >       >       From: yanzhe liu <liuyanzhe@...>
>       >       >       To: main@ap-gto.groups.io
>       >       >       Sent: Sun, Mar 7, 2021 12:44 am
>       >       >       Subject: [ap-gto] Mach2 - Elongated stars
>       >       >
>       >       >
>       >       >       Testing new mach2 for a couple of nights. It works great out of the box and I am very pleased.
>       >       >
>       >       >       One issue bothering me is that I got slightly elongated stars across the entire image (15min Ha sub).
>       >       >       The exact same telescope/CCD were used with another mount and stars were round, I am
> wondering
>       > what I
>       >       > should check (I think there was due to some setup issue, but I could not figure it out).
>       >       >       - Used OAG for guiding, so there should not be any flexure.
>       >       >       - CCD orientation was 0/180 degree. The stars were elongated top to bottom.
>       >       >       -  I did polar alignment with PHD2 drift align. PA error should be < 5'. The field rotation of each sub
> is
>       > ~0.01
>       >       > degree, much larger than the other system (but elongated stars do not look like field rotation, they were
>       > same
>       >       > across the image)
>       >       >       - Both RA and DEC guiding curves looked smooth, had similar RMS. DEC correction was mainly to
>       > one
>       >       > direction.
>       >       >       - DEC balance was slightly off, camera heavy. Is Mach2 DEC sensitive to this? Will the
> guiding/image
>       > be
>       >       > affected?
>       >       >
>       >       >       I dont think any of the above is of particular concern, except DEC balance. Any comment/help is
>       > appreciated.
>       >       >
>       >       >       --
>       >       >       Roland Christen
>       >       >       Astro-Physics
>       >       >
>       >       >
>       >       >
>       >       >
>       >       >
>       >       >
>       >
>       >
>       >
>       >
>       >
>       >
>       >
>       >
>       >
>
>
>
>
>
>
>
>
>







Re: How to Re-grease a Mach1 with Auto-Adjust Motor Boxes?

Dominique
 

Hi,
With my Mach2 in my observatory and travel restrictions, my 2011 Mach1 has been sleep for a few months, so, reading your discussions, it made me want and courage to revisit it. I already had a little control on the lubrication side 4 or 5 years ago but not completely and I believe only on the RA axis. I carefully watched the linked videos / photos to check the cleaning and regreasing phases to be done ... and I attacked the disassembly, separation of the 2 axes and treatment of the RA axis to begin with. I am not in the "extreme cold" zone and I have 2 types of grease at my disposal, one lithium (yellow) and one synthetic (green with MoS2). This evening I cleaned and I let the night pass before doing the lubrication, it remains to know which of the 2 greases it is better to use. On the brake part of the RA axis, which was a bit hard and which I have already cleaned and reassembled, I put a little synthetic grease and that seems to have improved things. So I will see tomorrow morning and based on your advice if necessary. As I had opened and / or dismantled the engine blocks several times, it didn't seem complicated to me ... you have to be careful with the cables.
Clear Skies
Dominique


Re: Mach2 - Elongated stars

Roland Christen
 

Please post a screen shot of the guider graph with corrections showing, and all other details. From that I can tell you if there is anything going on with the mount.

Rolando



-----Original Message-----
From: yanzhe liu <liuyanzhe@...>
To: main@ap-gto.groups.io
Sent: Fri, Mar 12, 2021 4:41 pm
Subject: Re: [ap-gto] Mach2 - Elongated stars

I have been using mach1 and 1100 prior to mach2. I knew I changed mount to mach2 in ascom driver.

Let me try again with balanced DEC, as suggested by Roland, to see if the issue is going away.  

On Thu, Mar 11, 2021 at 7:38 AM Ray Gralak <iogroups@...> wrote:
Yanzhe,

> I am able to run "AP Log Zipper", there are 2 files shown in the app: ap.ini and Setting.apdb, however both were dated
> 12/29/2018. Maybe I did not enable ASCOM log.

Hmmm... that is not the default. Did you happen to use this computer with another A-P mount in the past?

Since it is probably a small file, please attach that zip file to a post. It's worth checking the settings to see if anything stands out as an incorrect setting.

BTW, can you also provide a dropbox or google drive link to one of the single raw FITS images with the elongated stars? It's important that it is an unprocessed image and not a jpeg or stacked with other images.

Thanks,

-Ray

> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
> Sent: Wednesday, March 10, 2021 10:36 PM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] Mach2 - Elongated stars
>
> Ray,
>
> I am able to run "AP Log Zipper", there are 2 files shown in the app: ap.ini and Setting.apdb, however both were dated
> 12/29/2018. Maybe I did not enable ASCOM log.
>
> Yanzhe
>
> On Sun, Mar 7, 2021 at 7:37 PM Ray Gralak <iogroups@...> wrote:
>
>
>       Yanhze,
>
>       > Where is ASCOM driver log? I dont use APCC, I use SGPro.
>
>       The AP V2 ASCOM driver, which you must use with SGPro, comes with a log zipper utility called "AP Log
> Zipper". You should be able to find it from the Windows start menu by typing that name. The utility will grab the log files
> for X number of days in the past. If you can't find it, you probably didn't install it when you installed the AP V2 driver. In
> that case, just reinstall the AP V2 driver and select the option to install it.
>
>       BTW, you can use APCC with SGPro. In fact, it is recommended. An APCC Pro license comes with your
> Mach2 mount, but you must contact A-P to get it.
>
>       -Ray
>
>
>       > -----Original Message-----
>       > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
>       > Sent: Sunday, March 7, 2021 4:19 PM
>       > To: main@ap-gto.groups.io
>       > Subject: Re: [ap-gto] Mach2 - Elongated stars
>       >
>       > Ray,
>       >
>       > Where is ASCOM driver log? I dont use APCC, I use SGPro.
>       >
>       > Yanzhe
>       >
>       > On Sun, Mar 7, 2021 at 10:45 AM Ray Gralak <iogroups@...> wrote:
>       >
>       >
>       >       Hi Yanzhe,
>       >
>       >       Can you zip and post your PHD2 logs, as well as APCC/AP V2 ASCOM driver logs?
>       >
>       >       There might be something useful there.
>       >
>       >       -Ray
>       >
>       >       > -----Original Message-----
>       >       > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
>       >       > Sent: Sunday, March 7, 2021 10:12 AM
>       >       > To: main@ap-gto.groups.io
>       >       > Subject: Re: [ap-gto] Mach2 - Elongated stars
>       >       >
>       >       > Roland,
>       >       >
>       >       > I will check my mount serial number later as I just packed everything due to rain forecast.
>       >       >
>       >       > My camera's orientation was 0/180 degree, so I assume top to bottom elongation would be DEC.
>       >       >
>       >       > I dont have any picture of my setup, I just tore it down since it will be rainy this week. My setup is
>       >       > FSQ106+OAG+16803, image scale is 3.5".
>       >       > I was imaging Rosetta Nebula, after it was just past meridian for 2-3 hours.
>       >       >
>       >       > I used PHD2 drift for PA, it reported <5' PA error, I am waiting for polemaster adapter so I can confirm I
> get
>       > good PA
>       >       > next time.
>       >       >
>       >       > DEC was out of balance because my setup was rear end heavy, if it was in balance position then I
> could
>       > not rotate
>       >       > my CCD in all directions. My guess is that the DEC balance was off by less than 1lb. In the next test, I
> can
>       > balance
>       >       > DEC to see if the issue still exists.
>       >       >
>       >       > My suspicion is that if DEC balance is off, then DEC might creep under gravity, even PA is perfect. So
> you
>       > might
>       >       > see DEC continually drift  then gets corrected by PHD2 periodically.
>       >       >
>       >       > Yanzhe
>       >       >
>       >       > On Sun, Mar 7, 2021 at 9:35 AM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
>       >       >
>       >       >
>       >       >       Couple of questions:
>       >       >
>       >       >
>       >       >       1 - what's the mount's serial number
>       >       >       2 - which axis is the elongation
>       >       >       3 - which direction was the scope pointing (RA-Dec)
>       >       >       4 - what scope and focal length or what is the arc sec per pixel.
>       >       >       5 - do you have a picture of your setup?
>       >       >
>       >       >
>       >       >
>       >       >       One comment about balance - it should be easy for you to completely balance the scope with the
>       > clutches
>       >       > loose. Can you estimate how many lb out of balance your scope is in Dec? Normally i would not think
> this
>       > would
>       >       > have any effect, but doesn't hurt to check this.
>       >       >
>       >       >
>       >       >
>       >       >       Roland Christen
>       >       >       Astro-Physics Inc.
>       >       >
>       >       >
>       >       >
>       >       >
>       >       >       -----Original Message-----
>       >       >       From: yanzhe liu <liuyanzhe@...>
>       >       >       To: main@ap-gto.groups.io
>       >       >       Sent: Sun, Mar 7, 2021 12:44 am
>       >       >       Subject: [ap-gto] Mach2 - Elongated stars
>       >       >
>       >       >
>       >       >       Testing new mach2 for a couple of nights. It works great out of the box and I am very pleased.
>       >       >
>       >       >       One issue bothering me is that I got slightly elongated stars across the entire image (15min Ha sub).
>       >       >       The exact same telescope/CCD were used with another mount and stars were round, I am
> wondering
>       > what I
>       >       > should check (I think there was due to some setup issue, but I could not figure it out).
>       >       >       - Used OAG for guiding, so there should not be any flexure.
>       >       >       - CCD orientation was 0/180 degree. The stars were elongated top to bottom.
>       >       >       -  I did polar alignment with PHD2 drift align. PA error should be < 5'. The field rotation of each sub
> is
>       > ~0.01
>       >       > degree, much larger than the other system (but elongated stars do not look like field rotation, they were
>       > same
>       >       > across the image)
>       >       >       - Both RA and DEC guiding curves looked smooth, had similar RMS. DEC correction was mainly to
>       > one
>       >       > direction.
>       >       >       - DEC balance was slightly off, camera heavy. Is Mach2 DEC sensitive to this? Will the
> guiding/image
>       > be
>       >       > affected?
>       >       >
>       >       >       I dont think any of the above is of particular concern, except DEC balance. Any comment/help is
>       > appreciated.
>       >       >
>       >       >       --
>       >       >       Roland Christen
>       >       >       Astro-Physics
>       >       >
>       >       >
>       >       >
>       >       >
>       >       >
>       >       >
>       >
>       >
>       >
>       >
>       >
>       >
>       >
>       >
>       >
>
>
>
>
>
>
>
>
>







--
Roland Christen
Astro-Physics


Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

Kent Kirkley
 

Joe

You said "The U of T had the fortune of getting"
Was U of T, Texas or Tenessee?
If Texas what years were you there?
I was there 1965-69 and also used Fortran punched card programs.
And yes, I used a slide rule (2) in high school, both K&E's.

Kent Kirkley



-----Original Message-----
From: Joe Zeglinski <J.Zeglinski@...>
To: main@ap-gto.groups.io
Sent: Fri, Mar 12, 2021 3:29 pm
Subject: Re: [ap-gto] Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

    Maybe,  I can somewhat top that,  Don.
 
    First year engineering,  Fortran punched card programs,  on the big fish-bowl machine – an awe inspiring IBM-7094, long before the IBM-360,  and which was the original IBM-7090 upgraded  with something new - a Floating Point Processor.
That was the death knell for the desktop NCR Tabulators. The UofT had the fortune of getting the second IBM-7094 in production,  after NASA got theirs for Project Mercury. The latter’s introduction  is portrayed in the recent movie, “Computing Figures”, which brought back wondrous memories for me.
 
    But I preferred using the undergrad machine, an IBM-1620 with a coffin-sized floating point processor,  we hung over it to get ourselves warmed up on a cold winters morning, Working for the eelier mentioned prof,  even got special permission to actually run it after midnight – my first PC, sort of. Loved to turn off the lab room lights, and enjoy all the Neon Hex-code indicators and control panel switch’s lights flash like a laser show. Wish I had taken a picture. No PC today compares to that thrill and amazing sight, perhaps only beat by the IBM-7094 and IBM-360 light show when running  diagnostics.
 
    Last thing I did with one of my dozen or so  basement Honeywell Minicomputers, was to play an originally PDP-8 programmed,  Christmas Carol,  from the RFI noise generated by the mini’s control panel (specifically)  incandescent bulb, (Arithmetic Overflow flip-flop Indicator), flickering  on & off by program as a portable radio tuned to any off-AM-station frequency , crackled melodically, even 10 feet away,  in unison to the carol. Computing Security wasn’t a concept in those early days.
 
    “Halcion Days” ... of computing,  when computers were new and lots more fun than debug work, after I taught myself computing,  before Computer Science came along,
 
    Thanks for bringing back all the shared memories, guys.   Now back to my bug-free Pickett – wonder why we called its sliding  indicator window a “Cursor”, instead of a “Mouse”, since it really worked  the same way  :-)
 
Joe Z.
 
From: Don Anderson via groups.io
Sent: Friday, March 12, 2021 2:49 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)
 
I did my first programing in Fortran with punch cards on an IBM360.
woe be to the person who dropped their program on the way to class!. Sorting a couple hundred punch cards 10 min before class started was stressful!
 
Don Anderson
 
 
On Friday, March 12, 2021, 11:57:15 a.m. MST, Jeffrey Wolff <jmw2800@...> wrote:
 
 
I had to use a slide rule in high school. I remember my Dad buying a basic four function calculator when I was finishing high school.

I learned about HP calculator's in college and bought 3 different programmable calculators by the time I graduated. My first drafting class was using paper, pencils and a bunch of tools to make lines and circles. Eventually did AutoCAD and digital circuit design.

Started programming computers using punch cards. Eventually got my masters in Computer Science and spent my working life running networks, switches, routers, firewalls, wireless, fiber optics and other stuff to bring the Internet to everybody at the university. Been working at my employer since 1989. We went from 1.5 megabits/second for the whole state higher education network to a pair of 100 gigabit/second Internet2 circuits now.


Re: Mach2 - Elongated stars

yanzhe liu
 

I have been using mach1 and 1100 prior to mach2. I knew I changed mount to mach2 in ascom driver.

Let me try again with balanced DEC, as suggested by Roland, to see if the issue is going away.  

On Thu, Mar 11, 2021 at 7:38 AM Ray Gralak <iogroups@...> wrote:
Yanzhe,

> I am able to run "AP Log Zipper", there are 2 files shown in the app: ap.ini and Setting.apdb, however both were dated
> 12/29/2018. Maybe I did not enable ASCOM log.

Hmmm... that is not the default. Did you happen to use this computer with another A-P mount in the past?

Since it is probably a small file, please attach that zip file to a post. It's worth checking the settings to see if anything stands out as an incorrect setting.

BTW, can you also provide a dropbox or google drive link to one of the single raw FITS images with the elongated stars? It's important that it is an unprocessed image and not a jpeg or stacked with other images.

Thanks,

-Ray

> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
> Sent: Wednesday, March 10, 2021 10:36 PM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] Mach2 - Elongated stars
>
> Ray,
>
> I am able to run "AP Log Zipper", there are 2 files shown in the app: ap.ini and Setting.apdb, however both were dated
> 12/29/2018. Maybe I did not enable ASCOM log.
>
> Yanzhe
>
> On Sun, Mar 7, 2021 at 7:37 PM Ray Gralak <iogroups@...> wrote:
>
>
>       Yanhze,
>
>       > Where is ASCOM driver log? I dont use APCC, I use SGPro.
>
>       The AP V2 ASCOM driver, which you must use with SGPro, comes with a log zipper utility called "AP Log
> Zipper". You should be able to find it from the Windows start menu by typing that name. The utility will grab the log files
> for X number of days in the past. If you can't find it, you probably didn't install it when you installed the AP V2 driver. In
> that case, just reinstall the AP V2 driver and select the option to install it.
>
>       BTW, you can use APCC with SGPro. In fact, it is recommended. An APCC Pro license comes with your
> Mach2 mount, but you must contact A-P to get it.
>
>       -Ray
>
>
>       > -----Original Message-----
>       > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
>       > Sent: Sunday, March 7, 2021 4:19 PM
>       > To: main@ap-gto.groups.io
>       > Subject: Re: [ap-gto] Mach2 - Elongated stars
>       >
>       > Ray,
>       >
>       > Where is ASCOM driver log? I dont use APCC, I use SGPro.
>       >
>       > Yanzhe
>       >
>       > On Sun, Mar 7, 2021 at 10:45 AM Ray Gralak <iogroups@...> wrote:
>       >
>       >
>       >       Hi Yanzhe,
>       >
>       >       Can you zip and post your PHD2 logs, as well as APCC/AP V2 ASCOM driver logs?
>       >
>       >       There might be something useful there.
>       >
>       >       -Ray
>       >
>       >       > -----Original Message-----
>       >       > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
>       >       > Sent: Sunday, March 7, 2021 10:12 AM
>       >       > To: main@ap-gto.groups.io
>       >       > Subject: Re: [ap-gto] Mach2 - Elongated stars
>       >       >
>       >       > Roland,
>       >       >
>       >       > I will check my mount serial number later as I just packed everything due to rain forecast.
>       >       >
>       >       > My camera's orientation was 0/180 degree, so I assume top to bottom elongation would be DEC.
>       >       >
>       >       > I dont have any picture of my setup, I just tore it down since it will be rainy this week. My setup is
>       >       > FSQ106+OAG+16803, image scale is 3.5".
>       >       > I was imaging Rosetta Nebula, after it was just past meridian for 2-3 hours.
>       >       >
>       >       > I used PHD2 drift for PA, it reported <5' PA error, I am waiting for polemaster adapter so I can confirm I
> get
>       > good PA
>       >       > next time.
>       >       >
>       >       > DEC was out of balance because my setup was rear end heavy, if it was in balance position then I
> could
>       > not rotate
>       >       > my CCD in all directions. My guess is that the DEC balance was off by less than 1lb. In the next test, I
> can
>       > balance
>       >       > DEC to see if the issue still exists.
>       >       >
>       >       > My suspicion is that if DEC balance is off, then DEC might creep under gravity, even PA is perfect. So
> you
>       > might
>       >       > see DEC continually drift  then gets corrected by PHD2 periodically.
>       >       >
>       >       > Yanzhe
>       >       >
>       >       > On Sun, Mar 7, 2021 at 9:35 AM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
>       >       >
>       >       >
>       >       >       Couple of questions:
>       >       >
>       >       >
>       >       >       1 - what's the mount's serial number
>       >       >       2 - which axis is the elongation
>       >       >       3 - which direction was the scope pointing (RA-Dec)
>       >       >       4 - what scope and focal length or what is the arc sec per pixel.
>       >       >       5 - do you have a picture of your setup?
>       >       >
>       >       >
>       >       >
>       >       >       One comment about balance - it should be easy for you to completely balance the scope with the
>       > clutches
>       >       > loose. Can you estimate how many lb out of balance your scope is in Dec? Normally i would not think
> this
>       > would
>       >       > have any effect, but doesn't hurt to check this.
>       >       >
>       >       >
>       >       >
>       >       >       Roland Christen
>       >       >       Astro-Physics Inc.
>       >       >
>       >       >
>       >       >
>       >       >
>       >       >       -----Original Message-----
>       >       >       From: yanzhe liu <liuyanzhe@...>
>       >       >       To: main@ap-gto.groups.io
>       >       >       Sent: Sun, Mar 7, 2021 12:44 am
>       >       >       Subject: [ap-gto] Mach2 - Elongated stars
>       >       >
>       >       >
>       >       >       Testing new mach2 for a couple of nights. It works great out of the box and I am very pleased.
>       >       >
>       >       >       One issue bothering me is that I got slightly elongated stars across the entire image (15min Ha sub).
>       >       >       The exact same telescope/CCD were used with another mount and stars were round, I am
> wondering
>       > what I
>       >       > should check (I think there was due to some setup issue, but I could not figure it out).
>       >       >       - Used OAG for guiding, so there should not be any flexure.
>       >       >       - CCD orientation was 0/180 degree. The stars were elongated top to bottom.
>       >       >       -  I did polar alignment with PHD2 drift align. PA error should be < 5'. The field rotation of each sub
> is
>       > ~0.01
>       >       > degree, much larger than the other system (but elongated stars do not look like field rotation, they were
>       > same
>       >       > across the image)
>       >       >       - Both RA and DEC guiding curves looked smooth, had similar RMS. DEC correction was mainly to
>       > one
>       >       > direction.
>       >       >       - DEC balance was slightly off, camera heavy. Is Mach2 DEC sensitive to this? Will the
> guiding/image
>       > be
>       >       > affected?
>       >       >
>       >       >       I dont think any of the above is of particular concern, except DEC balance. Any comment/help is
>       > appreciated.
>       >       >
>       >       >       --
>       >       >       Roland Christen
>       >       >       Astro-Physics
>       >       >
>       >       >
>       >       >
>       >       >
>       >       >
>       >       >
>       >
>       >
>       >
>       >
>       >
>       >
>       >
>       >
>       >
>
>
>
>
>
>
>
>
>







Re: Mach2 - Elongated stars

yanzhe liu
 

Agree, I never had any issue with mach1 and 1100, so I think I must have made a mistake here.


On Thu, Mar 11, 2021 at 12:10 AM Bill Long <bill@...> wrote:
Dude there is something wrong with  your config. I literally cannot get the mount to NOT produce perfect stars. Call me if you are up and need a hand. :) 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of yanzhe liu <liuyanzhe@...>
Sent: Wednesday, March 10, 2021 10:36 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Mach2 - Elongated stars
 
Ray,

I am able to run "AP Log Zipper", there are 2 files shown in the app: ap.ini and Setting.apdb, however both were dated 12/29/2018. Maybe I did not enable ASCOM log.

Yanzhe

On Sun, Mar 7, 2021 at 7:37 PM Ray Gralak <iogroups@...> wrote:
Yanhze,

> Where is ASCOM driver log? I dont use APCC, I use SGPro.

The AP V2 ASCOM driver, which you must use with SGPro, comes with a log zipper utility called "AP Log Zipper". You should be able to find it from the Windows start menu by typing that name. The utility will grab the log files for X number of days in the past. If you can't find it, you probably didn't install it when you installed the AP V2 driver. In that case, just reinstall the AP V2 driver and select the option to install it.

BTW, you can use APCC with SGPro. In fact, it is recommended. An APCC Pro license comes with your Mach2 mount, but you must contact A-P to get it.

-Ray


> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
> Sent: Sunday, March 7, 2021 4:19 PM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] Mach2 - Elongated stars
>
> Ray,
>
> Where is ASCOM driver log? I dont use APCC, I use SGPro.
>
> Yanzhe
>
> On Sun, Mar 7, 2021 at 10:45 AM Ray Gralak <iogroups@...> wrote:
>
>
>       Hi Yanzhe,
>
>       Can you zip and post your PHD2 logs, as well as APCC/AP V2 ASCOM driver logs?
>
>       There might be something useful there.
>
>       -Ray
>
>       > -----Original Message-----
>       > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
>       > Sent: Sunday, March 7, 2021 10:12 AM
>       > To: main@ap-gto.groups.io
>       > Subject: Re: [ap-gto] Mach2 - Elongated stars
>       >
>       > Roland,
>       >
>       > I will check my mount serial number later as I just packed everything due to rain forecast.
>       >
>       > My camera's orientation was 0/180 degree, so I assume top to bottom elongation would be DEC.
>       >
>       > I dont have any picture of my setup, I just tore it down since it will be rainy this week. My setup is
>       > FSQ106+OAG+16803, image scale is 3.5".
>       > I was imaging Rosetta Nebula, after it was just past meridian for 2-3 hours.
>       >
>       > I used PHD2 drift for PA, it reported <5' PA error, I am waiting for polemaster adapter so I can confirm I get
> good PA
>       > next time.
>       >
>       > DEC was out of balance because my setup was rear end heavy, if it was in balance position then I could
> not rotate
>       > my CCD in all directions. My guess is that the DEC balance was off by less than 1lb. In the next test, I can
> balance
>       > DEC to see if the issue still exists.
>       >
>       > My suspicion is that if DEC balance is off, then DEC might creep under gravity, even PA is perfect. So you
> might
>       > see DEC continually drift  then gets corrected by PHD2 periodically.
>       >
>       > Yanzhe
>       >
>       > On Sun, Mar 7, 2021 at 9:35 AM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
>       >
>       >
>       >       Couple of questions:
>       >
>       >
>       >       1 - what's the mount's serial number
>       >       2 - which axis is the elongation
>       >       3 - which direction was the scope pointing (RA-Dec)
>       >       4 - what scope and focal length or what is the arc sec per pixel.
>       >       5 - do you have a picture of your setup?
>       >
>       >
>       >
>       >       One comment about balance - it should be easy for you to completely balance the scope with the
> clutches
>       > loose. Can you estimate how many lb out of balance your scope is in Dec? Normally i would not think this
> would
>       > have any effect, but doesn't hurt to check this.
>       >
>       >
>       >
>       >       Roland Christen
>       >       Astro-Physics Inc.
>       >
>       >
>       >
>       >
>       >       -----Original Message-----
>       >       From: yanzhe liu <liuyanzhe@...>
>       >       To: main@ap-gto.groups.io
>       >       Sent: Sun, Mar 7, 2021 12:44 am
>       >       Subject: [ap-gto] Mach2 - Elongated stars
>       >
>       >
>       >       Testing new mach2 for a couple of nights. It works great out of the box and I am very pleased.
>       >
>       >       One issue bothering me is that I got slightly elongated stars across the entire image (15min Ha sub).
>       >       The exact same telescope/CCD were used with another mount and stars were round, I am wondering
> what I
>       > should check (I think there was due to some setup issue, but I could not figure it out).
>       >       - Used OAG for guiding, so there should not be any flexure.
>       >       - CCD orientation was 0/180 degree. The stars were elongated top to bottom.
>       >       -  I did polar alignment with PHD2 drift align. PA error should be < 5'. The field rotation of each sub is
> ~0.01
>       > degree, much larger than the other system (but elongated stars do not look like field rotation, they were
> same
>       > across the image)
>       >       - Both RA and DEC guiding curves looked smooth, had similar RMS. DEC correction was mainly to
> one
>       > direction.
>       >       - DEC balance was slightly off, camera heavy. Is Mach2 DEC sensitive to this? Will the guiding/image
> be
>       > affected?
>       >
>       >       I dont think any of the above is of particular concern, except DEC balance. Any comment/help is
> appreciated.
>       >
>       >       --
>       >       Roland Christen
>       >       Astro-Physics
>       >
>       >
>       >
>       >
>       >
>       >
>
>
>
>
>
>
>
>
>







Mach 1

thefamily90 Phillips
 

Been saving up to buy a used Mach1. Should be there by next Wednesday. If any of you new Mach2 owners have a Mach 1 you are willing to sell please contact me via private message/email. If the moderator feels this post is inappropriate please remove.
Thank you.

Jim Phillips
Thefamily90@...

 


Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)

Joe Zeglinski
 

    Maybe,  I can somewhat top that,  Don.
 
    First year engineering,  Fortran punched card programs,  on the big fish-bowl machine – an awe inspiring IBM-7094, long before the IBM-360,  and which was the original IBM-7090 upgraded  with something new - a Floating Point Processor.
That was the death knell for the desktop NCR Tabulators. The UofT had the fortune of getting the second IBM-7094 in production,  after NASA got theirs for Project Mercury. The latter’s introduction  is portrayed in the recent movie, “Computing Figures”, which brought back wondrous memories for me.
 
    But I preferred using the undergrad machine, an IBM-1620 with a coffin-sized floating point processor,  we hung over it to get ourselves warmed up on a cold winters morning, Working for the eelier mentioned prof,  even got special permission to actually run it after midnight – my first PC, sort of. Loved to turn off the lab room lights, and enjoy all the Neon Hex-code indicators and control panel switch’s lights flash like a laser show. Wish I had taken a picture. No PC today compares to that thrill and amazing sight, perhaps only beat by the IBM-7094 and IBM-360 light show when running  diagnostics.
 
    Last thing I did with one of my dozen or so  basement Honeywell Minicomputers, was to play an originally PDP-8 programmed,  Christmas Carol,  from the RFI noise generated by the mini’s control panel (specifically)  incandescent bulb, (Arithmetic Overflow flip-flop Indicator), flickering  on & off by program as a portable radio tuned to any off-AM-station frequency , crackled melodically, even 10 feet away,  in unison to the carol. Computing Security wasn’t a concept in those early days.
 
    “Halcion Days” ... of computing,  when computers were new and lots more fun than debug work, after I taught myself computing,  before Computer Science came along,
 
    Thanks for bringing back all the shared memories, guys.   Now back to my bug-free Pickett – wonder why we called its sliding  indicator window a “Cursor”, instead of a “Mouse”, since it really worked  the same way  :-)
 
Joe Z.
 

From: Don Anderson via groups.io
Sent: Friday, March 12, 2021 2:49 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)
 
I did my first programing in Fortran with punch cards on an IBM360.
woe be to the person who dropped their program on the way to class!. Sorting a couple hundred punch cards 10 min before class started was stressful!
 
Don Anderson
 
 
On Friday, March 12, 2021, 11:57:15 a.m. MST, Jeffrey Wolff <jmw2800@...> wrote:
 
 
I had to use a slide rule in high school. I remember my Dad buying a basic four function calculator when I was finishing high school.

I learned about HP calculator's in college and bought 3 different programmable calculators by the time I graduated. My first drafting class was using paper, pencils and a bunch of tools to make lines and circles. Eventually did AutoCAD and digital circuit design.

Started programming computers using punch cards. Eventually got my masters in Computer Science and spent my working life running networks, switches, routers, firewalls, wireless, fiber optics and other stuff to bring the Internet to everybody at the university. Been working at my employer since 1989. We went from 1.5 megabits/second for the whole state higher education network to a pair of 100 gigabit/second Internet2 circuits now.

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