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Re: APCC shows Altitude at 0 in Park 3
Ray Gralak
Hi Wayne,
toggle quoted messageShow quoted text
That might happen if there happened to be a communications issue getting the latitude. Try restarting APCC. -Ray
-----Original Message-----
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Re: APCC shows Altitude at 0 in Park 3
Wayne Hixson
PS running a Mach2. Latest Driver, APCC and ASCOM
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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.
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Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)
Barry's is bigger than ours  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
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Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)
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 (818) 773-2000 (818)773-2005 fax
Faculty (retired) Dept. of Electrical Engineering Caltech
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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
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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 (818) 773-2000 (818)773-2005 fax
Faculty (retired) Dept. of Electrical Engineering Caltech
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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 (818) 773-2000 (818)773-2005 fax
Faculty (retired) Dept. of Electrical Engineering Caltech
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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
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Re: Slide Rules and Slipsticks - in the 1960's B.C. - i.e. (Before Computers)
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
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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.
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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
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Re: [ap-ug] Astro-Physics Mach1GTO vs Mach2GTO
thefamily90 Phillips
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
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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
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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,
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Re: 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
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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, -- Roland Christen Astro-Physics
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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.
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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,
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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:
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