Date   

Re: PASILL4 LED problem

roy uyematsu <roystarman@...>
 

I changed mine out when it quit. Just make sure to figure out polarity and
do it. You need to unscrew the little base the LED is in. It is hot glued in
my case into the little socket it fit into. You will need a soldering iron
and the LED is smaller than the Standard one you see at Radio Shack. The do
sell them but you may wind up with an assortment pack.



Roy Uyematsu



roystarman@...



_____

From: ap-gto@... [mailto:ap-gto@...] On Behalf Of
neil6536
Sent: Wednesday, May 07, 2008 3:16 PM
To: ap-gto@...
Subject: [ap-gto] PASILL4 LED problem



I haven't used my polar scope for a while. Last night I could barely
coax any illumination from the LED unit. On a pair of new AA duracells
it didn't light at all; powered from the reticle socket on the 900GTO
it glowed (just) at setting 6, and even at setting 9 would not brighten
the reticle engravings sufficiently to be usable. Having checked the
polarity of the connections I can only conclude that the LED is dead or
at least dying. Am I missing something? Can I replace the LED myself?
All suggestions gratefully received! Neil McCaughan



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5:23 PM


PASILL4 LED problem

neil6536
 

I haven't used my polar scope for a while. Last night I could barely
coax any illumination from the LED unit. On a pair of new AA duracells
it didn't light at all; powered from the reticle socket on the 900GTO
it glowed (just) at setting 6, and even at setting 9 would not brighten
the reticle engravings sufficiently to be usable. Having checked the
polarity of the connections I can only conclude that the LED is dead or
at least dying. Am I missing something? Can I replace the LED myself?
All suggestions gratefully received! Neil McCaughan


Re: TEC 200

brad1h11
 

--- In ap-gto@..., "jimhp29401us" <thefamily90@...> wrote:

Does anyone have any thoughts or opinions about using an AP 900 GOTO
to
hold a TEC 200mm F/8 apo? Visual and Imaging? The scope weighs 44
lbs.,
without any extras. Appreciate any thoughts.

Jim Phillips
Jim

I had an TOA 150 on my AP900 before I got the AP140. If I remember it
was close to 50lbs with the counter weigh and extras. The 900 handled
it just fine. Rock solid.

Brad


Re: El Capitan Question

John Gleason
 

Any comments on the ETA for this mount?

- jg

-----Original Message-----
From: Larry Phillips <llp41astro@...>
Sent: May 5, 2008 9:40 AM
To: ap-gto@...
Subject: [ap-gto] Re: El Capitan Question

Roland,
Will the software you mention below be usable only on El Capitan or
also on the other mounts?

Larry


"In addition to the hardware possibilities, Ray Gralack is working on a
software program which will be the control center for any PC based
operation of this mount. All commands will go thru this program and get
sorted out before being sent to the servo. This means no more problems
with inappropriate Sync/Rcal commands which can get the mount "lost".
The program will also allow you to see the position of the scope
relative to the mount at any given time, so you will see whether or not
you can safely aquire or track an object beyond the meridian. The
program will also allow you to set software limits of telescope motion
for all parts of the sky. Together with the hardware limits, the system
should be pretty much bombproof."


Re: Belated thanks to bguerin1234

Brian Guerin
 

Good idea Joe, I'll try switching from tape to an o-ring on the
shaft, I also use an o-ring on my SPL eyepieces as a bumper in the
diagonal, that wasn't my idea either but it works great.

Brian



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

Hi Brian,

You bring up an interesting point about "marking a
counterweight balance
position" on the shaft.

I found it very convenient to do so with my new AP-900.
I located a 2" or so, O-Ring, and positioned it on the
counterweight shaft
exactly at the top of the counterweight. Every time I set up the
mount in
the dark field, it is a simple matter to snug the counterweight
right up
against the O-Ring. That is a good pre-balanced starting point when
attaching the OTA. No need to squint for a tape or ink marker -
just push
the weight up against the rubber O-Ring. If I add other equipment
after
that, it is easy to just slide the weight down a tad - for example,
a
predetermined one or two fingers (etc) down from the ring. The
remaining
counter balancing, as Roland often says, isn't that necessary -
after all,
it's not a G11 :-)

Joe

----- Original Message -----
From: "bguerin1234" <zapkgbg@...>
To: <ap-gto@...>
Sent: Tuesday, May 06, 2008 1:47 AM
Subject: [ap-gto] Re: Belated thanks to bguerin1234


Hi Javier,


If you have just one setup, it would probably be worth doing for
peace of mind and mark where everything goes with tape or marker.

Apparently I did put a diagram in the files section on how to hook
up your ampmeter to get the readings. You can search the archives
and read the postings related to this subject.

Good Luck,
Brian


--- In ap-gto@..., "javier_laina" <javier_laina@>
wrote:

Brian,

Could you explain how to balance a servo-controlled mount by
using
and amp-meter?

Cheers
Javier
http://personales.ya.com/javier_laina/



--- In ap-gto@..., "bguerin1234" <zapkgbg@> wrote:

Tom,

I'm glad it helped!!

Brian




--- In ap-gto@..., "tucstargzr" <tucstargzr@>
wrote:

I'm almost ashamed it took this long to complete this, but...

bguerin1234 posted a hand drawn schematic in the Files
section
that
illustrates how to use an amp-meter to balance the mount. I
finally
installed Amperage and voltage meters just under the rope
lights
in
the Observatory. Since I'm using an 11.5 Amp power supply, I
got
a
10
Amp meter.

With both the AP 600 and 1200 humming along, it barely
measures
an
amp! Slewing, of course bumps it up another ~1/2 amp, but on
a
10
amp
meter, that isn't quite the resolution for the fine balance
task.

At the same time, for an all thumbs "electrician", it was
interesting
to see how much of a load various 12V items I have draw.

Tom
Sings with the Stars


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Unguided imaging

Brian Peterson
 

I was glad to see that PemPro would finally work with my DSI camera,
so that I could correct the PE on my AP900. Last weekend I finally got
to try it. It started out measuring a pead-to-peak error of 6.7" (not
bad, I thought). When I finished less than 2 hours later, the residual
error was 1.4" peak-to-peak.

Well, I just had to see if this would hold up while imaging. So,
here's 2 hours' worth of 5-minute unguided subframes on M27. I was
really pleased with the results:

http://upload.pbase.com/bkpeterson/image/78225931/original

Congrats to everyone involved in making such fine instruments and
software!

Brian


Re: Unguided imaging

Roland Christen
 

In a message dated 5/6/2008 2:34:29 PM Central Daylight Time,
bpeterson@... writes:


Well, I just had to see if this would hold up while imaging. So,
here's 2 hours' worth of 5-minute unguided subframes on M27. I was
really pleased with the results:

http://upload.pbase.com/bkpeterson/image/78225931/original
That's a very fine image indeed!

Rolando


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Re: TEC 200

Eric Baumgartner
 

Hi, Jim:

I originally mounted my TMB 175 f/8 on an AP900GTO, intending to use it for
visual observing only. While it worked fine, the moment arm of the scope
lengthened the damping time such that I felt the arrangement was less than
ideal. I now support the scope on the AP1200GTO with the 24" ribbed mounting
plate (1200RP) with the tube rings directly attached to the plate, and this
configuration works much better.

All of my observing is done at either remote sites or, in winter, in my own
yard, so I set up and break down each and every time.

I suppose for your planetary and lunar imaging you might find the AP900
acceptable (lots of short exposures), but I think that you would be happier
using your AP1200.

Clear skies,

Eric Baumgartner
Redding, CT USA

On 5/6/08 10:33 AM, "jimhp29401us" <thefamily90@...> wrote:

Does anyone have any thoughts or opinions about using an AP 900 GOTO to
hold a TEC 200mm F/8 apo? Visual and Imaging? The scope weighs 44 lbs.,
without any extras. Appreciate any thoughts.

Jim Phillips


TEC 200

jimhp29401us
 

Does anyone have any thoughts or opinions about using an AP 900 GOTO to
hold a TEC 200mm F/8 apo? Visual and Imaging? The scope weighs 44 lbs.,
without any extras. Appreciate any thoughts.

Jim Phillips


Re: TEC 200

Roland Christen
 

In a message dated 5/6/2008 9:33:28 AM Central Daylight Time,
thefamily90@... writes:


Does anyone have any thoughts or opinions about using an AP 900 GOTO to
hold a TEC 200mm F/8 apo? Visual and Imaging? The scope weighs 44 lbs.,
without any extras. Appreciate any thoughts.
What kind of imaging? If you are doing planetary imaging, then no problem. If
long exposure deep sky, you can still do it, but the 1200 will be more
steady.

Roland


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Re: Belated thanks to bguerin1234

javier laina
 

Brian,

Thanks for your reply. I'll try it.

Cheers
Javier
http://personales.ya.com/javier_laina/


--- In ap-gto@..., "bguerin1234" <zapkgbg@...> wrote:

Hi Javier,

This subject came up last year about this time, Mach1 owners were
commenting on how "stiff" the RA and DEC axis's were on the Mach1
and how this made balancing difficult. I got my Mach1 a year ago
and
I noticed the same thing. Roland recommended that you could use an
ampmeter if you weren't comfortable doing it by feel. I talked to
one of the aircraft mechanics where I work and they set me up with
an ampmeter and showed me how to measure the amps from each motor
to
compare the draw and thus move the weight around until they were
equal in both directions (using 64x rate, I believe) on the RA and
then on the DEC. This was a fun experiment, I did it for my M250
and
later for my AP140. However, since pulling out the ampmeter
everynight isn't really an option, I've resorted to doing it by
feel
and it works fine, just as Roland said it would.

If you have just one setup, it would probably be worth doing for
peace of mind and mark where everything goes with tape or marker.

Apparently I did put a diagram in the files section on how to hook
up your ampmeter to get the readings. You can search the archives
and read the postings related to this subject.

Good Luck,
Brian


--- In ap-gto@..., "javier_laina" <javier_laina@>
wrote:

Brian,

Could you explain how to balance a servo-controlled mount by
using
and amp-meter?

Cheers
Javier
http://personales.ya.com/javier_laina/



--- In ap-gto@..., "bguerin1234" <zapkgbg@> wrote:

Tom,

I'm glad it helped!!

Brian




--- In ap-gto@..., "tucstargzr" <tucstargzr@>
wrote:

I'm almost ashamed it took this long to complete this, but...

bguerin1234 posted a hand drawn schematic in the Files
section
that
illustrates how to use an amp-meter to balance the mount. I
finally
installed Amperage and voltage meters just under the rope
lights
in
the Observatory. Since I'm using an 11.5 Amp power supply, I
got
a
10
Amp meter.

With both the AP 600 and 1200 humming along, it barely
measures
an
amp! Slewing, of course bumps it up another ~1/2 amp, but on
a
10
amp
meter, that isn't quite the resolution for the fine balance
task.

At the same time, for an all thumbs "electrician", it was
interesting
to see how much of a load various 12V items I have draw.

Tom
Sings with the Stars


Re: Belated thanks to bguerin1234

Joe Zeglinski
 

Hi Brian,

You bring up an interesting point about "marking a counterweight balance position" on the shaft.

I found it very convenient to do so with my new AP-900.
I located a 2" or so, O-Ring, and positioned it on the counterweight shaft exactly at the top of the counterweight. Every time I set up the mount in the dark field, it is a simple matter to snug the counterweight right up against the O-Ring. That is a good pre-balanced starting point when attaching the OTA. No need to squint for a tape or ink marker - just push the weight up against the rubber O-Ring. If I add other equipment after that, it is easy to just slide the weight down a tad - for example, a predetermined one or two fingers (etc) down from the ring. The remaining counter balancing, as Roland often says, isn't that necessary - after all, it's not a G11 :-)

Joe

----- Original Message -----
From: "bguerin1234" <zapkgbg@...>
To: <ap-gto@...>
Sent: Tuesday, May 06, 2008 1:47 AM
Subject: [ap-gto] Re: Belated thanks to bguerin1234


Hi Javier,


If you have just one setup, it would probably be worth doing for
peace of mind and mark where everything goes with tape or marker.

Apparently I did put a diagram in the files section on how to hook
up your ampmeter to get the readings. You can search the archives
and read the postings related to this subject.

Good Luck,
Brian


--- In ap-gto@..., "javier_laina" <javier_laina@...>
wrote:

Brian,

Could you explain how to balance a servo-controlled mount by using
and amp-meter?

Cheers
Javier
http://personales.ya.com/javier_laina/



--- In ap-gto@..., "bguerin1234" <zapkgbg@> wrote:

Tom,

I'm glad it helped!!

Brian




--- In ap-gto@..., "tucstargzr" <tucstargzr@> wrote:

I'm almost ashamed it took this long to complete this, but...

bguerin1234 posted a hand drawn schematic in the Files
section
that
illustrates how to use an amp-meter to balance the mount. I
finally
installed Amperage and voltage meters just under the rope
lights
in
the Observatory. Since I'm using an 11.5 Amp power supply, I
got
a
10
Amp meter.

With both the AP 600 and 1200 humming along, it barely
measures
an
amp! Slewing, of course bumps it up another ~1/2 amp, but on a
10
amp
meter, that isn't quite the resolution for the fine balance
task.

At the same time, for an all thumbs "electrician", it was
interesting
to see how much of a load various 12V items I have draw.

Tom
Sings with the Stars


------------------------------------

To UNSUBSCRIBE, or for general information on the ap-gto list
see http://groups.yahoo.com/group/ap-gtoYahoo! Groups Links




Re: Belated thanks to bguerin1234

Brian Guerin
 

Hi Javier,

This subject came up last year about this time, Mach1 owners were
commenting on how "stiff" the RA and DEC axis's were on the Mach1
and how this made balancing difficult. I got my Mach1 a year ago and
I noticed the same thing. Roland recommended that you could use an
ampmeter if you weren't comfortable doing it by feel. I talked to
one of the aircraft mechanics where I work and they set me up with
an ampmeter and showed me how to measure the amps from each motor to
compare the draw and thus move the weight around until they were
equal in both directions (using 64x rate, I believe) on the RA and
then on the DEC. This was a fun experiment, I did it for my M250 and
later for my AP140. However, since pulling out the ampmeter
everynight isn't really an option, I've resorted to doing it by feel
and it works fine, just as Roland said it would.

If you have just one setup, it would probably be worth doing for
peace of mind and mark where everything goes with tape or marker.

Apparently I did put a diagram in the files section on how to hook
up your ampmeter to get the readings. You can search the archives
and read the postings related to this subject.

Good Luck,
Brian


--- In ap-gto@..., "javier_laina" <javier_laina@...>
wrote:

Brian,

Could you explain how to balance a servo-controlled mount by using
and amp-meter?

Cheers
Javier
http://personales.ya.com/javier_laina/



--- In ap-gto@..., "bguerin1234" <zapkgbg@> wrote:

Tom,

I'm glad it helped!!

Brian




--- In ap-gto@..., "tucstargzr" <tucstargzr@> wrote:

I'm almost ashamed it took this long to complete this, but...

bguerin1234 posted a hand drawn schematic in the Files
section
that
illustrates how to use an amp-meter to balance the mount. I
finally
installed Amperage and voltage meters just under the rope
lights
in
the Observatory. Since I'm using an 11.5 Amp power supply, I
got
a
10
Amp meter.

With both the AP 600 and 1200 humming along, it barely
measures
an
amp! Slewing, of course bumps it up another ~1/2 amp, but on a
10
amp
meter, that isn't quite the resolution for the fine balance
task.

At the same time, for an all thumbs "electrician", it was
interesting
to see how much of a load various 12V items I have draw.

Tom
Sings with the Stars


Re: Mach1 and checking PASILL4 results

Dean S
 

Yes Pierre, mine is indeed the latest version.

Good luck with finding the issue with yours as this a sweet mount! I have
never experienced guiding this nice and smooth. It is better than my 1200
right now.

----- Original Message -----
From: "phenrotay" <Pierre.Henrotay@...>
To: <ap-gto@...>
Sent: Saturday, May 03, 2008 1:48 AM
Subject: [ap-gto] Re: Mach1 and checking PASILL4 results


Hi Dean,

could you confirm that your model is effectively a PASILL4 (ie the
latest one, with engravings till 2030 and rotating housing) ?

Thanks !
Pierre
--- In ap-gto@..., "Dean S" <dean@...> wrote:

Hi Pierre,

I managed to check the polar alignment scope tonight. After my
drift
alignment with Pempro, the polar scope is perfectly aligned with
all 3
stars.

What was unusual is, that when I looked thru the polar scope, it was
perfectly aligned without me even touching it. I doubt that would
happen
very often.

Dean


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Re: Backlash Adjustment in Mach1

hewholooks
 

Thanks. To update all interested parties - I was out last night and
the mount performed like new, no problems.

Hunter

--- In ap-gto@..., chris1011@... wrote:

In a message dated 5/3/2008 4:03:32 PM Central Daylight Time,
hewholooks@... writes:


After I did this proceedure, it suddenly hit me that I did the
adjustment with the mount fully loaded with about 40 pounds of
equipment.

Should I have done it with the mount empty, or is it OK to have
done
this fully loaded?
Doesn't matter. Either way is correct.

Rolando




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[Non-text portions of this message have been removed]


Re: Belated thanks to bguerin1234

javier laina
 

Brian,

Could you explain how to balance a servo-controlled mount by using
and amp-meter?

Cheers
Javier
http://personales.ya.com/javier_laina/



--- In ap-gto@..., "bguerin1234" <zapkgbg@...> wrote:

Tom,

I'm glad it helped!!

Brian




--- In ap-gto@..., "tucstargzr" <tucstargzr@> wrote:

I'm almost ashamed it took this long to complete this, but...

bguerin1234 posted a hand drawn schematic in the Files section
that
illustrates how to use an amp-meter to balance the mount. I
finally
installed Amperage and voltage meters just under the rope lights
in
the Observatory. Since I'm using an 11.5 Amp power supply, I got
a
10
Amp meter.

With both the AP 600 and 1200 humming along, it barely measures
an
amp! Slewing, of course bumps it up another ~1/2 amp, but on a
10
amp
meter, that isn't quite the resolution for the fine balance task.

At the same time, for an all thumbs "electrician", it was
interesting
to see how much of a load various 12V items I have draw.

Tom
Sings with the Stars


Re: El Capitan Question

Larry Phillips
 

Roland,
Will the software you mention below be usable only on El Capitan or
also on the other mounts?

Larry


"In addition to the hardware possibilities, Ray Gralack is working on a
software program which will be the control center for any PC based
operation of this mount. All commands will go thru this program and get
sorted out before being sent to the servo. This means no more problems
with inappropriate Sync/Rcal commands which can get the mount "lost".
The program will also allow you to see the position of the scope
relative to the mount at any given time, so you will see whether or not
you can safely aquire or track an object beyond the meridian. The
program will also allow you to set software limits of telescope motion
for all parts of the sky. Together with the hardware limits, the system
should be pretty much bombproof."


Re: PulseGuide and script

Pierre Henrotay
 

Thank you, Ray.
Seems that I still need to have a closer look at the "Rate inversion"
theme: I cannot figure out a rule of thumb yet, sometimes the results
are excellent and sometimes I need to invert the rates. Hit and miss.

BTW, I noticed that you added check boxes for doing this; they are
presented when the measured rates results are presnted. I would
suggest to move them to the Pulse Guider page itself. But I remember
that no further version of PG in its present form is to be expected,
or ? If you change your mind, have a think of this one...

CS,
Pierre

--- In ap-gto@..., "Ray Gralak" <rgr@...> wrote:

Hi Pierre,
So, if your plate solves returns RA/Dec then you can just subtract
the RA
values divide by time and multiply by 15. So, you should not need
to adjust
for declination (Cosine of Dec) in this case.


About Mach1GTO

siqingtan
 

I've noticed from the A-P website that notification for the latest
batch of Mach1's has begun. I am curious as to the "lag time" for this
mount, so if anyone here has ordered one and has been contacted
recently I would be quite interested as to when you placed yourself on
the wait list.I have ordered it in April this year,How long will I get
it.
Thanks!


Re: El Capitan Question

Roland Christen
 

In a message dated 5/5/2008 11:40:21 AM Central Daylight Time,
llp41astro@... writes:


Roland,
Will the software you mention below be usable only on El Capitan or
also on the other mounts?

Larry
Whatever applies the the large mount will also be useable on the others,
especially this new software. The servo is the same. A few options such as the
precision encoder, are not available for the small mounts, but most everything
else will be.

Roland


**************
Wondering what's for Dinner Tonight? Get new twists on
family favorites at AOL Food.

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