Re: New member: AP GTO on Parallax mount

Mike Mah

Hi Charles,

Yes, my problems are likely from sloppy initial setup.

On my GTO, the hand controller plugs into the GTO control panel
(GTOCP2) which is portable and in its own little pouch and not built
into the mount, as I believe it is on the AP mounts. This control panel
accepts RS232 input from other programs and I have used Digital
SkyVoice with it (at home anyways).


Mike Mah

"charles sinsofsky" <> wrote:
original article:
OK, hello,

One last note, inside the mount itself is more code, above and
that what is in the hand controller, sometimes it is possible
depending on
your code base, I do not know what code would be in a paralex 'bought
a/p goto system' e-prom code base, the hand controller first decides
if it
is safe to move to an object, the code there will say 'fine' and send
mount the ra/dec cords though it is possible that the mount itself
refuse. this is a safety feature built into the code base in the mount
because not everyone uses the mount with a hand controller. remember
the a/p
goto system can be used directly from a p.c. if the given computer
being used did not check for horizon it could technically inform the
to move the scope into the pier...we placed in additional checks for
to compensate for just that type of case. this code has over time
been even
more refined, so because of this, I am not sure what level of code
would be
in your given gto system, as opposed to the latest and greatest one
in a
given a/p gto mount right now.

But I would not worry about it...really..

- Charles Sinsofsky
Author: DigitalSky Voice, and contributor to the A/P mount GTO

----- Original Message -----
From: Mike Mah <>
To: <>
Sent: Sunday, March 26, 2000 9:58 AM
Subject: [ap-gto] New member: AP GTO on Parallax mount

Hello everybody,

I've just joined and I find these postings useful and informative. I
hope I can find help for some questions:

I have an AP155 EDFS with piggybacked Tak FSQ106 on a pier mounted
Parallax Series 125 with AP GTO v2.6. I have acquired these recently
and have only used this setup a few times, so that I have more
equipment than experience. I am waiting for an AP1200 mount, to
which I
will move the AP155.

With mount level and after proper polar alignment using the Polaris
routine, I have noticed that occasionally objects are indicated as
below the horizon when they are not. For example, last night at
9:30 pm the Orion Nebula was indicated to be below the horizon when
was not, and I could goto Betelgeuse. Did I miss something in the
manual on the GTO keypad controller about the horizon?

When I tried to goto M81, I had to stop the slewing as the scope was
going to hit the pier. What angle does the safety zone number (0-20)
refer to? Degrees from the polar axis so that the safety zone is a
(or circle on the sky)? Is this then a blind spot that the scope


Mike Mah

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