Date   

Re: 16" LX200R on an AP1200

ebuehrens
 

Gavin,

There's a guy named Jeff Young that hangs out on the Astromart
Equipment forum that has exactly this setup. Not sure he's too happy
with the OTA but the mount seems to take the load just fine. You might
want to email him.

Eric

--- In ap-gto@yahoogroups.com, "Gav" <gavbray@...> wrote:

I'm considering mounting a 16" LX200R on my new AP1200. I believe the
OTA weight is 110 lbs.

By the time accessories etc are added this would be close to the
advertised capacity limit of 140 lbs.

This concerns me and I wonder if anyone can offer any advice as to
whether this would be a suitable match or whether I'd be better with a
14" SCT (70 lbs). The scope would be used for visual work only and
housed in an observatory.

Is the extra 2" going to cause more problems than it's worth?

Thanks
Gavin


Re: Connecting the mount to the computer

roy <roystarman@...>
 

Yes the I/O gear ones work very well. I'm sure Roland and company will be
switching to USB soon.



_____

From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf Of
gary schones
Sent: Friday, March 30, 2007 12:33 AM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Connecting the mount to the computer



With serial cables getting harder to find can a serial 232 to usb
adpter be used to connect to the sky.
Gary


Re: Connecting the mount to the computer

N. Foldager
 

Gary Schones:

With serial cables getting harder to find can a serial 232 to usb
adpter be used to connect to the sky.
Gary
Yes. That's what I do.

Best regards,

Niels Foldager
Denmark


Re: Mach1GTO Waiting Time

Robert Schlingensiepen <schling@...>
 

Dear Marj,

Thank you for the precise update!

Robert

-----Original Message-----
From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf
Of Marj
Sent: Thursday, March 29, 2007 4:35 PM
To: ap-gto@yahoogroups.com
Subject: RE: [ap-gto] Mach1GTO Waiting Time

Dear Robert,
We are currently notifying people who signed up in early July 2003. It
is difficult to determine how long it will be before we catch up to
April 2006. Although there are a large number of people on the list, not
everyone will order when their name comes up. We are finishing up the
parts for the current production run now and will begin the next
production run shortly with delivery expected later this year. To be
honest, I don't think that we will get to your name this year, but maybe
next year........
Thanks for your interest.


Marj Christen
Astro-Physics, Inc
11250 Forest Hills Road
Machesney Park, IL 61115
Phone: 815-282-1513
Fax: 815-282-9847
www.astro-physics.com
Please include this e-mail with your response.

-----Original Message-----
From: ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com
[mailto:ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com]On
Behalf Of Robert Schlingensiepen
Sent: Tuesday, March 27, 2007 4:41 PM
To: ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com
Subject: [ap-gto] Mach1GTO Waiting Time

Hi all,

I'm on the Mach1GTO notification list since April 2006. Is there a
kind soul out there that has been notified for the current run and
could tell me when he/she was put on the list?

Thanks

Robert


Connecting the mount to the computer

gary schones <gary378@...>
 

With serial cables getting harder to find can a serial 232 to usb
adpter be used to connect to the sky.
Gary


16" LX200R on an AP1200

Gavin Bray
 

I'm considering mounting a 16" LX200R on my new AP1200. I believe the
OTA weight is 110 lbs.

By the time accessories etc are added this would be close to the
advertised capacity limit of 140 lbs.

This concerns me and I wonder if anyone can offer any advice as to
whether this would be a suitable match or whether I'd be better with a
14" SCT (70 lbs). The scope would be used for visual work only and
housed in an observatory.

Is the extra 2" going to cause more problems than it's worth?

Thanks
Gavin


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: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf Of
Rick K
Sent: Thursday, March 29, 2007 3:41 PM
To: ap-gto@yahoogroups.com
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
setting.
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.

Rick.

--- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> 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
mount,
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
accurate
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
then?

Thanks,
Joe

----- Original Message -----
From: "Rick K" <JunkMailGoesHere@...>
To: <ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> 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. <mailto:ap-gto%40yahoogroups.com> 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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Re: Follow Up on Attaching TOA 150 to AP900

N. Foldager
 

Ray York:

I would recommend going with the Tak plate:
http://www.buytelescopes.com/product.asp?t=&pid=11366&m=

and the Tak rings:
http://www.buytelescopes.com/product.asp?t=&pid=9817&m=
Is this a "permanent" fixation or some kind of dovetail?

Where to find pictures of this set-up?

Best regards,

Niels Foldager


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

observe_m13
 

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
setting.
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.

Rick.


--- 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
mount,
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
accurate
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
then?

Thanks,
Joe

----- 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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see http://groups.yahoo.com/group/ap-gto
Yahoo! Groups Links




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

Joe Zeglinski
 

Thanks for clearing up the confusion.

I think that Gilles approach, of manufacturing a special AP900 "base to
Losmandy adapter", is a good approach. That way, I can continue to use the
Losmandy standard pier, or on the Losmandy Meade Adapter (MA) option, attached
to an outdoor pillar, or even on a different portable tripod (with another
MA), at a remote site.

It's nice to simple drop and twist an AP900, without having to remove three
large knobs.
The AP900 SPA will be about 2 1/2 inches wider at the base (about 5.5" G11,
vs. 7.75" AP), than the Losmandy G11 base, but that shouldn't make a problem
in stability - or I could just machine a thicker short aluminum cylinder.
Wonder what dimensions Gilles used for his conversion.

Cheers,
Joe

----- Original Message -----
From: <chris1011@aol.com>
To: <ap-gto@yahoogroups.com>
Sent: Thursday, March 29, 2007 2:19 PM
Subject: Re: [ap-gto] Re:New member - advice on switching from G11 to AP900


In a message dated 3/29/2007 1:05:17 PM Central Daylight Time,
J.Zeglinski@rogers.com writes:


You actually have to "REMOVE", entirely, from the top sides of the pier
(pipe), these 6 screws (O.K. fewer, after you lose a few in the grass or
snow, at night).
Yes, you are correct. The three knobs are for the Mach1 mounting. I was
confused by the multiple posts and thought we were talking about the Mach1
vs. G11
mountings.

The 900/1200 uses 6 screws which need to be removed. However, it is just as
easy to remove the 4 knobs from the base of the mount and carry it out to a
permanent pier and re-attach without losing any polar alignments, as others
have
pointed out.

Rolando


**************************************
See what's free at
http://www.aol.com.






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

Joe Zeglinski
 

Thanks Roland,

First, may I join so very many of your customers, to thank you,
personally, for designing your mounts for us. They are a masterpiece of both
art, and engineering!

I thought there are just two ways to transport the AP900 mount:

(1) Completely "remove" SIX (6) button head SCREWS (not knobs) &
washers (5/16-18 x 5/8) which are used to attach the SPA to a standard AP/ATS
pier.

OR ...

(2) Completely REMOVE the FOUR (4) Black knobs that attach the fork section to
the pier adapter top (SPA or RPA). Perhaps, the normal practice, is not use
all 4 knobs? (Anyway, loosening is not enough.)

I do not see, in any of your literature on your web site, a THREE (3) KNOB
set, at the side of the pier, that only need to be "LOOSENED".

The only THREE item, I see, is the (3) turn buckle rods that stiffen the pier
pipe, and that is not relevant, here. I'm sure you didn't mean these.

Thanks,
Joe

----- Original Message -----
From: <chris1011@aol.com>
To: <ap-gto@yahoogroups.com>
Sent: Thursday, March 29, 2007 11:39 AM
Subject: Re: [ap-gto] New member - advice on switching from G11 to AP900


In a message dated 3/29/2007 12:55:07 AM Central Daylight Time,
J.Zeglinski@rogers.com writes:


If I remove the RA assembly by detaching
the fork bolts (from the pier adapter), I no longer preserve the
polar
azimuth adjustment.
You cannot remove the RA assembly by detaching the fork bolts. That is
simply
not a realistic option. Just simply lift the entire RA assembly out of the
pier, just as you would lift a G11 mount out of its pier.

Roland Christen


**************************************
See what's free at
http://www.aol.com.






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

Joe Zeglinski
 

Rolando,

I have a great big wide smile,after reading this ... but I can't quite
jump into the air, until you clarify one more bit for me.

Both you and Roland use the word "LOOSEN ... the three (3) hand KNOBS on
the side of the pier" !

This is correct for a Losmandy mount/pier, but I just cannot see that
capability on the AP900.
The pier adapters (SPA or RPA), have SIX (6) button head SCREWS (not knobs) &
washers (5/16-18 x 5/8) which are used to attach the SPA to a standard AP/ATS
pier.

You actually have to "REMOVE", entirely, from the top sides of the pier
(pipe), these 6 screws (O.K. fewer, after you lose a few in the grass or
snow, at night).

So, where are these THREE (3) "hand KNOBS" which DO NOT require complete
removal from the AP pier? Roland also mentioned them, so my eyes must be
deceiving me - which also not good for my astronomy.
The only other attachment, above the pier, is the FOUR (4) knob set that holds
down the fork to the SPA.

I keep looking through the GTOCP3 manual (June 30, 2006), and I just can't
see any 3 knob set in any picture. If I could find these, - and if they do NOT
have to be completely removed each time - I would finally be convinced, that I
can make this mount actually, easily transportable between house and yard.

Eagerly awaiting further clarification,
Joe

----- Original Message -----
From: "uncarollo2" <chris1011@aol.com>
To: <ap-gto@yahoogroups.com>
Sent: Thursday, March 29, 2007 11:45 AM
Subject: [ap-gto] Re:New member - advice on switching from G11 to AP900


--- In ap-gto@yahoogroups.com, "Rick K" <JunkMailGoesHere@...> wrote:

--- 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.
You do not need two pier adapters even if you have two piers. The pier
adapter stays with the 900 mount. Simply loosen the three hand knobs on
the side of the pier and pull the mount and pier adapter out as one
unit, and place it into the second pier. Then tighten the three hand
knobs and you are done. Why 2 pier adpaters???

Rolando


Re: Keypad problem ?

Dominik Wos <dominik@...>
 

Thanks for your response. The only problem is my location - Poland,
Europe so it is not so easy for me to send the keypad to the US. It
works and only the first row of left side keys do not work (I press
it but there is no reaction) and as I use the mount in my observatory
I can live without this first row. I have looked into the keypad to
see how it works and it is rather simply built but I have no idea
what inside the keypad is not working properly.

Anyway thanks for your advice,
Dominik


--- In ap-gto@yahoogroups.com, "Marj" <marj@...> wrote:

Dear Dominick,

I have never heard of this problem before. Please try it again and
if the situation remains, give us a call to obtain a return
authorization #.


Marj Christen
Astro-Physics, Inc
11250 Forest Hills Road
Machesney Park, IL 61115
Phone: 815-282-1513
Fax: 815-282-9847
www.astro-physics.com
Please include this e-mail with your response.

-----Original Message-----
From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com]On
Behalf Of Dominik Wos
Sent: Thursday, March 29, 2007 4:54 AM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Keypad problem ?



Hi to the Group !

I have a problem with my 1200GTO keypad. After unusing the mount
for
one week I switched it on and from this time the three left keys do
not
work (1, 6 and Goto). All other keys are ok and the mount is fully
operational with using RS232 conection but without having access
to "1"
key I can not use goto without my laptop. Strange ? Has anyone had
the
same problem ?

Best regards,
Dominik









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

Joe Zeglinski
 

Gilles,

Marvellous - that is exactly what I want to do.
To confirm, your specially machined G11 pier adapter, being a smaller diameter
than the AP's FSA "flat surface adapter" , has the Astro Physics part (SFA)
bolted on top of it. Then the AP900 simple mates with this as standard.

Can you post a picture of your G11/AP900 adapter or coupler in the photos
section? I will take it to a machine shop. Wish AP would sell one - seems like
such a common thing.

P.S. I don't know quite why, but I like the Losmandy pier better than the AP
or ATS. Would seem to make good sense to not have a lot of piers kicking
around the house, if AP would just sell the part like you made for yourself.

Thanks,
Joe

----- Original Message -----
From: <gilovision2@aol.com>
To: <ap-gto@yahoogroups.com>
Sent: Thursday, March 29, 2007 12:08 PM
Subject: Re: [ap-gto] New member - advice on switching from G11 to AP900


Hello,

I use my 900 GTO on a G11 pier, using a custom machined adaptor that bolts
on the 900SPA and the top of the pier.

The only thing I need when I setup my mount in my backyard is to remove the
scope and counterweight shaft.
I can easily carry the complete mount and pier outside whitout problem.
However, i am not Superman, Rolando will confirm ;-))

You can if you want remove the DEC axis in less than 5 seconds...OK, maybe
10....and the setup will be more easy to lift.

Gilles










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Re: Mach1GTO Waiting Time

Hank Sielski
 

Robert and Group,

After seeing Marj's email, I went back and checked my email records.
Apparently I put myself on the notification lists for the AP400/Traveler in
November 2002, not November 2003. As I said earlier, I received a
notification earlier this month.

It was the AP900/155EDF list that I signed up for in November 2003...so I
waited about 2.5 years for my 900...I think this is pretty standard for
mounts now.

Sorry for any confusion or anxiety that my faulty memory may have caused...

Hank

On 3/28/07, Robert Schlingensiepen <schling@mail.telepac.pt> wrote:

Hi Hank, Jay and Harvey,

Thanks for your replies. Well, somebody said that "patience is a
virtue."

Robert

-----Original Message-----
From: ap-gto@yahoogroups.com <ap-gto%40yahoogroups.com> [mailto:
ap-gto@yahoogroups.com <ap-gto%40yahoogroups.com>] On Behalf
Of mrgrytt
Sent: Wednesday, March 28, 2007 4:04 PM
To: ap-gto@yahoogroups.com <ap-gto%40yahoogroups.com>
Subject: [ap-gto] Re: Mach1GTO Waiting Time

--- In ap-gto@yahoogroups. <mailto:ap-gto% <ap-gto%25>40yahoogroups.com>
com, "Hank
Sielski" <hsielski@...> wrote:

Hi Tobert,

I was notified for the Mach 1 just this month (had to decline,
unfortunately). I think I got on the notification list for the
AP400 in early November 2003, at the same time I signed up for the
Traveler...

Regards,

Hank
I was notified on 2/19/2007 after getting on the list for a 400
on 10/12/2001.
Looks like they've covered quite a lot of ground if they're
almost into 2004 already.

Harvey






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

Joe Zeglinski
 

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 mount,
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 accurate
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
then?

Thanks,
Joe

----- Original Message -----
From: "Rick K" <JunkMailGoesHere@shaw.ca>
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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Re: New member - advice on switching from G11 to AP900

Joe Zeglinski
 

Thanks Joel,

You bring up some good points ... I'm feeling warmer already.

I don't think I would need to adjust a G11 azimuth when I (carefully)
transport the mount - assuming everything is locked down tight. That switch
should be perfect, an as accurate as the final twist in the G11 tripod head
slot. I suppose, that really is the same as snuggling the AP900 adjuster knob
back to position as well. I think I was confused by the large arcs in the fork
base slots, and worried that this placement could not be easily repeated. Now
I realize that it isn't as important as remembering against which azimuth
adjuster side the AP had initially been set to - just tight the other back.

Still, I might have an AP900 G11 adapter plate (2 inch high collar) made
for a drop-and-twist remount. Wish AP sold one along with all their other HGM
Losmandy parts.


By the way ... I just had to ask ... WHY are you still keeping the
G11/Gemini?

... do you all see me smiling more :-) ?

Thanks a bunch,
Joe

----- Original Message -----
From: "Joel Guthals" <jeguthals@mcn.net>
To: <ap-gto@yahoogroups.com>
Sent: Thursday, March 29, 2007 9:40 AM
Subject: [ap-gto] Re:New member - advice on switching from G11 to AP900


Joe,

I have both mounts--G-11/Gemini and AP900GTO. They are both fine mounts. The
AP900 has higher capacity and has more refined mechanical components leading
to more accurate unguided tracking. The electronics of both mounts are very
advanced. The Gemini system offers one advantage--modeling of the sky as
celestial objects are synched, thus allowing accurate GOTO's even though the
polar alignment is not perfect. However, the AP electronic system allows
interfacing with other programs, including T-Point which does sky modeling.
Also the AP hand controller is easier to use than the Gemini controller.

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.

I have found both mounts to be very accurate for guided imaging. If you are
going to carry more than 35 lbs on the mount the AP900 will be better. For
example, my G-11 is maxed out with my C-14, while the AP900 handles it with
ease and is soild as a rock.

Hope this helps.

Joel





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

Joe Zeglinski
 

Thanks Roy,

That helps. I see what you mean - if I back off on one AZ adjust knob
slightly, and move the mount indoors, I can repeat the reinstallation next
time, by carefully snuggling the mount back down, against the same original
adjuster side, and retighten. Just wish the mount had slots for the bolts,
which would mean less time trying to insert them. That should work.

Otherwise, I just need to have my own "900FSA" flat surface adapter machined
for me, with "drop-down-and-twist" bolt slots.
You bring out some good points.

Thanks, that is a relief.

Joe

----- Original Message -----
From: "roy" <roystarman@hughes.net>
To: <ap-gto@yahoogroups.com>
Sent: Thursday, March 29, 2007 5:29 AM
Subject: RE: [ap-gto] New member - advice on switching from G11 to AP900


You can remove the AP900 mount form the pier by loosening 4 knobs. The pier
can remain and adapter plate can remain. The adapter plate doesn't have any
drilled through holes so they won't let stuff get down inside. I think you
should go to the AP site and download the manual for more details. You also
do not to have to full disassemble the mount for transport. I leave the Dec
housing attached and simply take off the counter weight and shaft. You may
loose your azimuth adjustment when doing this taking the mount off since you
have to loosen one of the screws. You can minimize that though by a marker
or some thing similar to mark the one screw and only loosen the other. When
you put the mount back together, use the mark to make sure you first screw
has not moved and then snug up the second to the azimuth adjustment block.
This should get you to back within a minute of where you took it apart. In
comparison to the G-11 it is indeed a Mercedes vs. a Chevrolet. An AP 900
in good running order will track within +/- 5 arc seconds and have a very
smooth periodic error. The bearing surface of the mount is larger and is
much less susceptible to a slight misbalance. With a TAK FSQ 106N My
periodic error is guided out and I rarely turn on PEC, but when I do it the
mount runs about 1.2 rms. I probably can't do better than that with the FSQ
as the scope for doing the polar alignment.. You will discover that you
polar alignment will be much better as the adjustments are easier and more
accurate than the G-11. I think the G-11 Semi-pier tripod is a great design
but the throat is too small for a 900 which is designed to use a 8 inch
pier. Perhaps you know someone who can make an adapter?



_____

From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf Of
astrojaz
Sent: Wednesday, March 28, 2007 11:37 AM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] New member - advice on switching from G11 to AP900



Hello everyone,

As a new member, I am looking forward to scanning through more of
the posts in this forum, but in the short term, my decision time is
very short.

I recently acquired a used Losmandy G-11, and am on the learning,
but suddenly, well beyond my best expectations, an opportunity for an
AP900 GTO has come up, and wanted the advice from those of you who
have made the leap from a Losmandy G-11 Gemini to the Astro Physics
AP900 GTO. I suppose it might be like moving from perhaps the
Cadillac of computerized mounts - to the Rolles Royce. But before I
fully commit to a significant new expenditure, I would really be
oblidged to hear your own opinions, on the differences from using
your old G-11 and now your AP900.

For example:
One difference between the two that concerns me somewhat, is
switching the mount from the house, to a pier in the yard. With the G-
11, I can simply loosen 3 large aluminum pier knobs, and transfer the
entire mount to a field tripod - and back later. I wouldn't have to
redo any polar alignment, if I didn't readjust the polar elevation or
azimuth knobs. This saves a lot of time by skipping the COLD start,
and just doing a quick and simple WARM start.

However, looking at the "equivalent" AP900 take down items, it
doesn't seem quite as simple, just transfering from one pier
adapter "plate" to another. If I remove the RA assembly by detaching
the fork bolts (from the pier adapter), I no longer preserve the
polar
azimuth adjustment. The other alternative is to remove the 6 screws
from the pier adapter "plate" itself, and then remove the (entire) RA
assembly, fork, and pier adapter, as a unit - this would be
equivalent
to packing up the G-11 from it's tripod. The problem is that there
are
SIX of these smaller, black coloured, side-screws to handle in the
dark, which is just inviting Murphy to a star party!
The G-11 installation is so much easier - all you have to do is drop
the RA assembly into just 3 tripod slots, and give a quick turn
before tightening the 3 knobs - instead of searching for 6 screw
holes on the side, in the dark. Of course, I am talking about a
specific situation here rather than a permanent installation or a
full startup in the field.

You see my concern ... and that's just a handling issue, but what
about
the hopefully, MUCH improved performance of the AP900 over the pretty
good G-11? I would value your experienced opinions on that.

I still have some extensive reading of the AP900 manual to do, but
perhaps you could get me going.

Many thanks for any guidance, and reassurance.

Joe









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Re: Keypad problem ?

 

Dear Dominick,

I have never heard of this problem before. Please try it again and if the situation remains, give us a call to obtain a return authorization #.


Marj Christen
Astro-Physics, Inc
11250 Forest Hills Road
Machesney Park, IL 61115
Phone: 815-282-1513
Fax: 815-282-9847
www.astro-physics.com
Please include this e-mail with your response.

-----Original Message-----
From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com]On Behalf Of Dominik Wos
Sent: Thursday, March 29, 2007 4:54 AM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Keypad problem ?



Hi to the Group !

I have a problem with my 1200GTO keypad. After unusing the mount for
one week I switched it on and from this time the three left keys do not
work (1, 6 and Goto). All other keys are ok and the mount is fully
operational with using RS232 conection but without having access to "1"
key I can not use goto without my laptop. Strange ? Has anyone had the
same problem ?

Best regards,
Dominik


Re: Mach1GTO Waiting Time

 

Dear Robert,
We are currently notifying people who signed up in early July 2003. It is difficult to determine how long it will be before we catch up to April 2006. Although there are a large number of people on the list, not everyone will order when their name comes up. We are finishing up the parts for the current production run now and will begin the next production run shortly with delivery expected later this year. To be honest, I don't think that we will get to your name this year, but maybe next year........
Thanks for your interest.


Marj Christen
Astro-Physics, Inc
11250 Forest Hills Road
Machesney Park, IL 61115
Phone: 815-282-1513
Fax: 815-282-9847
www.astro-physics.com
Please include this e-mail with your response.

-----Original Message-----
From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com]On Behalf Of Robert Schlingensiepen
Sent: Tuesday, March 27, 2007 4:41 PM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Mach1GTO Waiting Time



Hi all,

I'm on the Mach1GTO notification list since April 2006. Is there a
kind soul out there that has been notified for the current run and
could tell me when he/she was put on the list?

Thanks

Robert