Re: New member - advice on switching from G11 to AP900

roy <roystarman@...>

There is also no real problem with moving RA and Dec. Once you have
remounted the 900 use a bubble level to establish Park position 1 ( Mount
pointing north scope on west side an C/W shaft and telescope level. You can
then use the resume from park 1 position to initialize. .


From: [] On Behalf Of
Rick K
Sent: Thursday, March 29, 2007 3:41 PM
Subject: [ap-gto] Re:New member - advice on switching from G11 to AP900

In my scenario, if you don't move the RA or Dec from where they were
'parked', even if you take the mount off the pier and disassemble the
axis, when you put it back together, you won't even have to do a sync.
Basically it is as if the mount never moved off of the pier. I usually
park the mount in a known position and take everything apart leaving
the adapter plate on a permanent pier. When I put everything back
together, one day or one month later, I can resume from park and do a
goto on an object and it will be close to dead center in an eyepiece
or on a CCD chip. If nothing was moved on the mount then it will be as
if it never left the pier.
If I am using a portable pier as I do with the Mach1, I can get
almost the same level of accuracy if I am careful in polar aligning.
Unfortunately the portable pier gets set up in different spots in my
back yard to view different portions of the sky or avoid some direct
lighting, so I normally have to adjust the azimuth. If I am careful to
level the pier properly, I don't have to adjust the mount's altitude
In your scenario, if the pier is permanent and the RA and or Dec axis
are manually moved after parking and prior to re-powering, yes, the
mount will have to be re-synchronized but polar alignment should not
have to be changed unless the pier has changed somehow.
I am not sure of the accuracy of the clock in the keypad. I know that
it is quite good, but like all clocks, none are perfect and all must
be adjusted at some point.


--- In ap-gto@yahoogroups. <> com, "Joseph
Zeglinski" <J.Zeglinski@...> wrote:

Hi Rick,

Much appreciated.

It's actually O.K. to completely lose RA &DEC position - even
remove the
DEC axle, I think.
What I worried about was losing "site alignment" - the Az/El of the
which would take more time realigning each time.

My idea is that I can reassemble the mount - follow your
suggestion about
dropping the fork against the adjuster original position - and
perform a SYNC,
or is it Recalibrate - and I am quickly back up and running. This
should work,
shouldn't it?

About the "internal time" though; Doesn't the pad processor keep
time using the coin battery? I suppose that in two or three years,
the CR
Lithium battery will run down, and the time will stop, but surely
not before


----- Original Message -----
From: "Rick K" <JunkMailGoesHere@...>
To: <ap-gto@yahoogroups. <> com>
Sent: Thursday, March 29, 2007 10:57 AM
Subject: [ap-gto] Re:New member - advice on switching from G11 to AP900

--- In ap-gto@yahoogroups. <> com, "Joel
Guthals" <jeguthals@> wrote:

As far as switching the mounts from one location to another, there
is no real difference. For the AP900GTO you would buy two pier
adapters, one for each of your piers. Then you could lift the the
mount from one to the other by removing and reinstalling the four hand
screws that attach the AP900 to the pier adapter. You may have to do
some fine tuning of the azimuth adjusters, same as with the G-11.

Actually, you can make it even simpler on yourself. Turn off the power
to the mount. You can park it at one of the three preset postions
prior to power down or not, it doesn't matter. Just undo _one_ side of
the azimuth adjusters when you take the four hold-down bolts out to
remove the mount. The other one can have the knob taped to the block
to maintain its setting. When putting the mount back on the plate,
install the four hold-down bolts but don't fully tighten them. Then
tighten up that one azimuth adjuster side then tighten the four
hold-down bolts. If the pier didn't move and the mount itself hasn't
been physically moved in RA or Dec then it will be pretty much exactly
right where it left off. Power it back up, resume from park and
continue to use it. The only thing that _might_ be slightly off is the
keypad internal time if the mount has been stored for quite some time
between use.

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