Date   

Re: Exact CW shaft diameter

Howard Hedlund
 

Hi Pawel,



The shaft is 1.125" - the 29 mm number was rounded up from 28.575 mm.
We generally allow about 0.010" or 0.25 mm over for the inside bore of
the CW sleeve giving a bore of 1.135" or 28.825 mm.



Mag. 7 skies!



Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf
Of Pawel T. Lancucki
Sent: Wednesday, April 16, 2008 5:00 AM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Exact CW shaft diameter




Hi Gents

My Mach-1 is on order now. As I live in Europe, importing the CWs itself
would not be practical and I am going to order them made locally. This
will
be done by a small astro company in Poland which produced for me
stainless
steel counterweights for my other mounts.

Now, as I plan to order the CWs in advance, I need to know the exact
diameter of the CW shaft. In the AP manuals this is stated as either
1,125"
(which equals to 28,575mm) or 29mm - almost 0,5mm difference. My
experience
shows that I should have 0,3 to 0,4mm clearance between the CW aluminium
insert and the shaft. Therefore, I am not sure what should be the CW
central bore.

Could somebody measure exact diameter of the Mach-1 CW shaft and/or CW
central bore to let me have a better idea on that?

Best regards,

Pawel Lancucki


Re: Autoguider settings for PemProAP

John Winfield
 

PemPro doesn't actually correct for the movement of the star, it just
records the movement of the star and deduces the PE from it.

John


--- In ap-gto@yahoogroups.com, "Luca" <darknrg@...> wrote:

Hello,

I would like to know if anyone could suggest the autoguider settings for
PemProAP. I specifically refer to:
1) AGGRESSIVENESS: in CCDSoft, the software I use, would you recommend a
setting of 10 for aggressiveness, so that all errors will be
corrected in
full by autoguiding? I am aware of the fact that, with this setting, the
autoguiding could be "chasing" the seeing, but I also believe that, in
recording the PE of the system, we want all errors to be corrected
fully.
2) In order to avoid the problem mentioned above, i.e. the guiding
"chasing"
the seeing with a very aggressive guiding, what delay between exposures
would you recommend, given a magnitude 4-6 star and hence an exposure
between 3 to 5 seconds?

Thanks for any tip you can provide guys.

Luca

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


Re: Mach1 and checking PASILL4 results

Pierre Henrotay
 

Hi,

good news for you ! I rechecked mine again yesterday (got a few hours
before clouds rolled in) and same result: align with polar scope
only, check with PoleAlignMax => 10 arcminutes error.

Which mount did you check it on ?
I'll be interested in your future feedback on your Mach1, although I
am convinced that the mount is not the trouble; I suspect my
polarscope is (or I am missing something but honestly, no clue).
My next plan is to check on a friend's 900GTO, when he is available
for a test ... and the weather clears up...

Pierre

--- In ap-gto@yahoogroups.com, "Dean S" <dean@...> wrote:

I found that my finder is right on the money after I did a drift
alignment
using the PemPro alignment tool. I could only see Polaris and the
2nd star
but they are both right where they should be. Mount and polar
scope new as
of 12/07.

And I never did adjust the polar scope, or even check it really. I
will
have an opportunity in a couple weeks to check it with a Mach1 and
can
report back.

Dean


Re: Exact CW shaft diameter

Joe Zeglinski
 

Hi Pawel,

Did you man to say that your counterweights will have a "brass" insert - like the AP and others, rather than aluminum?
Just a heads up for you.

Joe

----- Original Message -----
From: "Pawel T. Lancucki" <pawel.lancucki@pl.ibm.com>
To: <ap-gto@yahoogroups.com>
Sent: Wednesday, April 16, 2008 5:59 AM
Subject: [ap-gto] Exact CW shaft diameter



Hi Gents

My Mach-1 is on order now. As I live in Europe, importing the CWs itself
would not be practical and I am going to order them made locally. This will
be done by a small astro company in Poland which produced for me stainless
steel counterweights for my other mounts.

Now, as I plan to order the CWs in advance, I need to know the exact
diameter of the CW shaft. In the AP manuals this is stated as either 1,125"
(which equals to 28,575mm) or 29mm - almost 0,5mm difference. My experience
shows that I should have 0,3 to 0,4mm clearance between the CW aluminium
insert and the shaft. Therefore, I am not sure what should be the CW
central bore.

Could somebody measure exact diameter of the Mach-1 CW shaft and/or CW
central bore to let me have a better idea on that?

Best regards,

Pawel Lancucki


Autoguider settings for PemProAP

Luca <darknrg@...>
 

Hello,

I would like to know if anyone could suggest the autoguider settings for
PemProAP. I specifically refer to:
1) AGGRESSIVENESS: in CCDSoft, the software I use, would you recommend a
setting of 10 for aggressiveness, so that all errors will be corrected in
full by autoguiding? I am aware of the fact that, with this setting, the
autoguiding could be "chasing" the seeing, but I also believe that, in
recording the PE of the system, we want all errors to be corrected fully.
2) In order to avoid the problem mentioned above, i.e. the guiding "chasing"
the seeing with a very aggressive guiding, what delay between exposures
would you recommend, given a magnitude 4-6 star and hence an exposure
between 3 to 5 seconds?

Thanks for any tip you can provide guys.

Luca


Re: DEC move problem during autoguide

Roland Christen
 

In a message dated 4/15/2008 10:38:45 PM Central Daylight Time,
rhoowl@yahoo.com writes:


i'm trying to loosen up the ra axis also...but i'm having trouble
removing the retaining ring....any suggestions?
Don't worry about the RA axis. This axis never has to reverse when guiding,
so it does not operate the same as the Dec axis. Leave it be if the mount
guides well in RA. Changing the pressure on the worm won't change the way it
operates.

Rolando


**************
It's Tax Time! Get tips, forms and advice on AOL Money &amp;
Finance.
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Exact CW shaft diameter

Pawel Lancucki
 

Hi Gents

My Mach-1 is on order now. As I live in Europe, importing the CWs itself
would not be practical and I am going to order them made locally. This will
be done by a small astro company in Poland which produced for me stainless
steel counterweights for my other mounts.

Now, as I plan to order the CWs in advance, I need to know the exact
diameter of the CW shaft. In the AP manuals this is stated as either 1,125"
(which equals to 28,575mm) or 29mm - almost 0,5mm difference. My experience
shows that I should have 0,3 to 0,4mm clearance between the CW aluminium
insert and the shaft. Therefore, I am not sure what should be the CW
central bore.

Could somebody measure exact diameter of the Mach-1 CW shaft and/or CW
central bore to let me have a better idea on that?

Best regards,

Pawel Lancucki


Re: Control box- screws size

Howard Hedlund
 

They are #8-32 x 3/8". You actually received a pair of these with your
mount. They were in a small yellowish envelope, along with your safety
stop and the Velcro wire ties that was inside a bubble-wrap bag in the
accessories box. However, if you can't find them, they are not that
hard to find at a good hardware store.



Mag. 7 skies!



Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf
Of Morgan Spangle
Sent: Sunday, April 13, 2008 4:54 PM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Control box- screws size



What is the size of the set screws that hold the CPO3 control box onto
the AP1200 GTO
mount? Is it 8-32 or a different size? I'll be removing the box and
would like to have a couple
of thumb screws to replace the set screws so I don't have to think about
having a hex set with
me in the dark...
Morgan


Re: DEC move problem during autoguide

Jamie
 

hi

i was getting this problem with my ap900...i just got it...and when
first shooting images with it i was getting about 2 or 3 arc seconds
jumps on the dec about once every 20 minutes.....also..it was having
trouble making small adjustments in the dec....

the solution was rather easy...i removed the motor from the
dec....and when turning the dec it was rather difficult....
then i removed the retaining ring on for the dec axis....and gave the
cylinder a tap to free the shaft....now the dec axis turns rather
freely.....if you screw the retaining ring on too tight it will
revert to the old ways........after getting everything back on..i
tested the dec...autoguided perfectly for over 2 hours without even
an inkling of a jump

i'm trying to loosen up the ra axis also...but i'm having trouble
removing the retaining ring....any suggestions?

jamie



--- In ap-gto@yahoogroups.com, "gradi_petrovic" <petrovic@...> wrote:

Dear all,

I have strange phenomena since few days autoguiding my AP900 with
STL11k. First positive DEC move (+Y) produces erratic movement and
mount start to oscillate with full +/- moves. Tried different
autoguiding cables between mount and cam but the cable seems no to
be
the root-cause. After resetting the backlash with PemPro the
problem
seems to disappear. I'm not sure but believe if I press the plug
very
firmly into GTO control box the phenomena disappears as well, but
will check this again today. The problem is evident in same way in
CCDsoft and Maxim. DEC backlash is zeroed initially in the keypad
and
software. Problem exists with .5x and 1x rate. Scope is fairly
balanced but polar alignment is not perfect however ...

Any idea what could be cause of this problem, it's driving me
crazy?

Best Regards,

Gradimir


Some data for SME's:

AP900 GTOCP2 / FL:780mm / STL-11kM with int. guider chip (7.4 micro)

Log data:

Track Log Started at UT 2008-02-03 00:22:34
UT Time, Star X, Star Y, OffsetX, OffsetY, Corr X, Corr Y,
Bright
00:22:39, 340.08, 179.20, 0.18, 1.10, 0.12, -0.01,
7193
00:22:45, 340.16, 178.61, 0.26, 0.51, 0.05, -0.01,
5161
00:22:51, 340.10, 178.13, 0.20, 0.03, 0.00, -0.01,
8934
00:22:57, 339.82, 178.47, -0.08, 0.37, 0.04, 0.00,
5993
00:23:03, 339.82, 178.20, -0.08, 0.10, 0.01, 0.00,
6379
00:23:09, 339.85, 178.31, -0.05, 0.21, 0.02, 0.00,
5415
00:23:14, 340.08, 178.01, 0.18, -0.09, 0.00, -0.01,
6282
00:23:20, 340.20, 178.37, 0.30, 0.27, 0.03, -0.02,
3759
00:23:26, 340.03, 178.12, 0.13, 0.02, 0.00, -0.01,
5479
00:23:32, 340.18, 178.24, 0.28, 0.14, 0.01, -0.02,
6053
00:23:38, 339.96, 178.25, 0.06, 0.15, 0.01, 0.00,
5991
00:23:43, 339.87, 178.13, -0.03, 0.03, 0.00, 0.00,
5283
00:23:49, 340.28, 178.32, 0.38, 0.22, 0.02, -0.02,
4171
00:23:55, 339.63, 178.60, -0.27, 0.50, 0.05, 0.02,
5749
00:24:01, 351.81, 177.82, 11.91, -0.28, 0.00, -0.95,
7630
00:24:08, 331.55, 178.36, -8.35, 0.26, 0.00, 0.66,
3486
00:24:14, 349.00, 178.14, 9.10, 0.04, 0.03, -0.72,
7336
00:24:21, 330.51, 178.01, -9.39, -0.09, -0.03, 0.75,
6405
00:24:27, 348.61, 178.08, 8.71, -0.02, 0.02, -0.69,
7063
00:24:34, 330.93, 178.33, -8.97, 0.23, 0.00, 0.71,
6259
00:24:41, 348.61, 177.80, 8.71, -0.30, 0.00, -0.69,
7204


Re: Mach1GTO pdf document on AP Tech Support Page

Howard Hedlund
 

It's fixed. Thanks for the heads-up!



Mag. 7 skies!



Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf
Of Jeffrey Patrick
Sent: Monday, April 14, 2008 5:29 PM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Mach1GTO pdf document on AP Tech Support Page



Howard,

It appears that although the technical support page seems to have a
link to the instructions for the 2nd run of Mach1GTO mounts, the link
brings you to the instructions for the 1st run of mounts instead of the
2nd. The link for the 3rd run of mounts seems to work correctly. I
realize that the differences are minor, but I thought you might want to
know about the discrepancy.

Jeff


Swapping PASILLs

Wiggins, Rick
 

Hi Roland,
I just received my new MACH1...beautiful! I am planning on using my
AP1200 PASILL4 for my MACH1. I would simply swich it back and forth as
necessary. I never checked my AP1200 and PASILL combination alignment,
but it seems to work very very well(same for my AP900).

Am I correct in assuming that if the AP1200 PASILL works fine in the
AP1200 that it will work fine in the MACH1 because the PASILL threads
are well aligned in the mounts?

If I have been following your comments on the previous related
threads, I believe that I can use it interchangeably.
Thanks, Rick


Re: Keypad update and real time clock.

bill_lombardo_bill
 

First class support and answer, Mr. Howard,
the keypad beeps when I set time (obviously after I press GOTO)and
the time stays as settled (no random garbage of digits).
In the next few days I'll try a "time-blind" alignment and tracking,
as you kindly suggested, and a reinstallment of the 4.15 firmware
(freshly charged). I'll keep you informed about everything even if,
as a last resource, I'm prepared to let you have my keypad through
the gentle UNITRON: your mount is a jewel and I desire it in full
performance as a Rolex watch deserves.
Thanks indeed for the time beeing, Mr. Howard.
--- In ap-gto@yahoogroups.com, "Howard" <howard@...> wrote:

Hello Mr. Mella



It may be that your Real Time Clock's (RTC) built in battery has
died.
Your keypad is now over eight years old. However, to date, we
have
had so few RTC problems, that we really aren't sure what to expect
when
one does go bad. One question: when entering the time in the setup
menu, does your keypad give you a "beep" when you press GOTO to
save the
new time setting? (I hope that you are pressing GOTO and not
MENU!)
Also, does the keypad remember the time that you set, even though
it no
longer advances, or does the keypad just display random garbage for
the
time and date?



I do not believe that the keypad firmware update has anything to do
with
the RTC failure, but you are certainly welcome to try re-loading the
firmware. If you do this, I would delete your current v.4.15
loader
from your computer and download a new copy from the internet, just
in
case a bit or two was lost in cyberspace on your original download
from
the internet. It won't do any good to re-load something that is
already corrupted!



Some of the keypads produced over the years have RTC's that are
held in
place by a soldered retaining bar. Others are simply held in
place by
a clip on either side. If your keypad has the version with the
clips,
it will be relatively easy to change the RTC. If it has the
soldered
retaining bar, you may wish to send it in for service (through
Unitron,
of course).



I am currently researching the RTC issue with our manufacturer for
you
and one other customer. Please contact me directly for more
information.



In the mean time, you can use the mount, but you will want to do the
following, since the keypad can no longer keep time. I am
assuming
that the keypad's time will remain as you set it and simply won't
advance. In other words, the time value won't corrupt into
nonsense;
it just won't go forward after it is set. If the time and date
turn to
garbage, you will need to initialize the mount via a computer - see
below.

1. When you start out, power up the mount just long enough to set
the correct time and date in the setup menu. You may want to set
it a
minute or so fast, since it will no longer advance the time, and you
need a minute or so for the next step. You must be in auto-
connect =
NO to proceed. If you need to change the auto-connect setting, do
that
now also.
2. Power down the mount, wait a few seconds and then power it
back
up again. As long as the time hasn't corrupted in the short time
since
you set it, the keypad will now send the correct starting time and
date
to the GTOCPx control box.
3. Go through your normal start up routine: enter your location
#,
and then either polar align or do a star sync. You should
probably not
use resume from park or resume from reference park.
4. Once you are at the main menu, press 4=Time/LST
5. The time and date that you entered in step one should be
showing. This step is just to verify that garbage time was NOT
sent to
the GTOCPx control box.
6. The GTOCPx control box will now be keeping its own time. It
only needs the initial time and date from the keypad. After that,
the
GTOCPx will perform all of its own calculations based on its own
internal oscillator. It will perform goto's as it should, and will
know when to flip sides. The GTOCPx will know the correct LST,
even
though the keypad will not. You can verify that time is being
kept in
the control box by using the 3=Get Time/Loc FrMnt command in the
keypad's 2=Setup -> 1=Locations and Time -> 2=Set Date and Time
menu.
7. Keep in mind as you observe, that the Keypad's LST or "Z"
value
will be wrong. This could be confusing since the Keypad displays
the Z
value every time you choose a star as your observing target.
8. Do not use a park position at the end of your session. The
keypad sends calculated RA and Dec coordinates to the mount for a
park,
and it will not calculate these correctly without the correct time.
You could send the scope into the pier.



Another possibility is to initialize the mount with a computer
program
like PulseGuide. You can still use the keypad for all of your
GoTo's,
you simply will not use it to establish time and location or to
park the
mount. Good luck, and let me know if I can be of further help.



howard@...



Mag. 7 skies!



Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On
Behalf
Of bill_lombardo_bill
Sent: Saturday, April 12, 2008 11:54 AM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Keypad update and real time clock.



Help me to understand.
After upgrading the keypad to firmware 4.15 and after favourably
checking Status "All system go", in a mount 400GTO purchased in
October
2000, the Time, Date,GMT,LST and Photo Timer no more update and no
more
advance as before (red lights blink but do not change digits in
Time/LST).
Could it be Real Time Clock Battery exhausted or could it be for
some
other reason I can't understand?
Do you think I can still make use of the mount or I have to change
RTC
chip?





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


Re: Mach1GTO pdf document on AP Tech Support Page

Jeffrey Patrick
 

Howard,

? Thank you very much for all your help.

Jeff

-----Original Message-----
From: Howard <howard@astro-physics.com>
To: ap-gto@yahoogroups.com
Sent: Tue, 15 Apr 2008 2:43 pm
Subject: RE: [ap-gto] Mach1GTO pdf document on AP Tech Support Page






It's fixed. Thanks for the heads-up!

Mag. 7 skies!

Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf
Of Jeffrey Patrick
Sent: Monday, April 14, 2008 5:29 PM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Mach1GTO pdf document on AP Tech Support Page

Howard,

It appears that although the technical support page seems to have a
link to the instructions for the 2nd run of Mach1GTO mounts, the link
brings you to the instructions for the 1st run of mounts instead of the
2nd. The link for the 3rd run of mounts seems to work correctly. I
realize that the differences are minor, but I thought you might want to
know about the discrepancy.

Jeff


Re: Keypad update and real time clock.

Howard Hedlund
 

Hello Mr. Mella



It may be that your Real Time Clock's (RTC) built in battery has died.
Your keypad is now over eight years old. However, to date, we have
had so few RTC problems, that we really aren't sure what to expect when
one does go bad. One question: when entering the time in the setup
menu, does your keypad give you a "beep" when you press GOTO to save the
new time setting? (I hope that you are pressing GOTO and not MENU!)
Also, does the keypad remember the time that you set, even though it no
longer advances, or does the keypad just display random garbage for the
time and date?



I do not believe that the keypad firmware update has anything to do with
the RTC failure, but you are certainly welcome to try re-loading the
firmware. If you do this, I would delete your current v.4.15 loader
from your computer and download a new copy from the internet, just in
case a bit or two was lost in cyberspace on your original download from
the internet. It won't do any good to re-load something that is
already corrupted!



Some of the keypads produced over the years have RTC's that are held in
place by a soldered retaining bar. Others are simply held in place by
a clip on either side. If your keypad has the version with the clips,
it will be relatively easy to change the RTC. If it has the soldered
retaining bar, you may wish to send it in for service (through Unitron,
of course).



I am currently researching the RTC issue with our manufacturer for you
and one other customer. Please contact me directly for more
information.



In the mean time, you can use the mount, but you will want to do the
following, since the keypad can no longer keep time. I am assuming
that the keypad's time will remain as you set it and simply won't
advance. In other words, the time value won't corrupt into nonsense;
it just won't go forward after it is set. If the time and date turn to
garbage, you will need to initialize the mount via a computer - see
below.

1. When you start out, power up the mount just long enough to set
the correct time and date in the setup menu. You may want to set it a
minute or so fast, since it will no longer advance the time, and you
need a minute or so for the next step. You must be in auto-connect =
NO to proceed. If you need to change the auto-connect setting, do that
now also.
2. Power down the mount, wait a few seconds and then power it back
up again. As long as the time hasn't corrupted in the short time since
you set it, the keypad will now send the correct starting time and date
to the GTOCPx control box.
3. Go through your normal start up routine: enter your location #,
and then either polar align or do a star sync. You should probably not
use resume from park or resume from reference park.
4. Once you are at the main menu, press 4=Time/LST
5. The time and date that you entered in step one should be
showing. This step is just to verify that garbage time was NOT sent to
the GTOCPx control box.
6. The GTOCPx control box will now be keeping its own time. It
only needs the initial time and date from the keypad. After that, the
GTOCPx will perform all of its own calculations based on its own
internal oscillator. It will perform goto's as it should, and will
know when to flip sides. The GTOCPx will know the correct LST, even
though the keypad will not. You can verify that time is being kept in
the control box by using the 3=Get Time/Loc FrMnt command in the
keypad's 2=Setup -> 1=Locations and Time -> 2=Set Date and Time menu.
7. Keep in mind as you observe, that the Keypad's LST or "Z" value
will be wrong. This could be confusing since the Keypad displays the Z
value every time you choose a star as your observing target.
8. Do not use a park position at the end of your session. The
keypad sends calculated RA and Dec coordinates to the mount for a park,
and it will not calculate these correctly without the correct time.
You could send the scope into the pier.



Another possibility is to initialize the mount with a computer program
like PulseGuide. You can still use the keypad for all of your GoTo's,
you simply will not use it to establish time and location or to park the
mount. Good luck, and let me know if I can be of further help.



howard@astro-physics.com



Mag. 7 skies!



Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On Behalf
Of bill_lombardo_bill
Sent: Saturday, April 12, 2008 11:54 AM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Keypad update and real time clock.



Help me to understand.
After upgrading the keypad to firmware 4.15 and after favourably
checking Status "All system go", in a mount 400GTO purchased in October
2000, the Time, Date,GMT,LST and Photo Timer no more update and no more
advance as before (red lights blink but do not change digits in
Time/LST).
Could it be Real Time Clock Battery exhausted or could it be for some
other reason I can't understand?
Do you think I can still make use of the mount or I have to change RTC
chip?


Re: Swapping PASILLs

Roland Christen
 

In a message dated 4/15/2008 4:39:29 PM Central Daylight Time,
rickwiggins@earthlink.net writes:


Am I correct in assuming that if the AP1200 PASILL works fine in the
AP1200 that it will work fine in the MACH1 because the PASILL threads
are well aligned in the mounts?
They are interchangeable.

Rolando


**************
It's Tax Time! Get tips, forms and advice on AOL Money &amp;
Finance.
(http://money.aol.com/tax?NCID=aolcmp00300000002850)


Re: Smartguide AP Mach 1 GTO question

Jeff Young <jey@...>
 

Ah yes, I hadn't even considered Dec.

Thanks,
-- Jeff.


________________________________

From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On
Behalf Of chris1011@aol.com
Sent: Tuesday, April 15, 2008 5:02 PM
To: ap-gto@yahoogroups.com
Subject: Re: [ap-gto] Smartguide AP Mach 1 GTO question



In a message dated 4/15/2008 7:55:50 AM Central Daylight Time,
jey@adobe.com <mailto:jey%40adobe.com>
writes:

> Forgive what may be a stupid question, but why is Smartguide
needed for
> lunar imaging? Isn't lunar tracking rate good enough? Or does
the moon
> wobble enough in its orbit to be an issue?
>
>

The Lunar rate is only approximate. The Moon changes distance
from earth so
the rate varies. Secondly, and most importantly, the Moon is
either rising or
falling in Dec, so one needs to add a slow Dec movement.

Rolando

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Re: Smartguide AP Mach 1 GTO question

ayiomamitis
 

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

In a message dated 4/15/2008 7:55:50 AM Central Daylight Time, jey@...
writes:


Forgive what may be a stupid question, but why is Smartguide needed for
lunar imaging? Isn't lunar tracking rate good enough? Or does the moon
wobble enough in its orbit to be an issue?

The Lunar rate is only approximate. The Moon changes distance from earth so
the rate varies. Secondly, and most importantly, the Moon is either rising or
falling in Dec, so one needs to add a slow Dec movement.
Aha! Thanks Rolando.

I must confess there are times I have PERFECT tracking with the moon and other times
there is a slight and consistent drift.

Now you answered this troubling observation I have had in the back of my mind.

Anthony.


Rolando


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


Re: Smartguide AP Mach 1 GTO question

Jeff Young <jey@...>
 

Forgive what may be a stupid question, but why is Smartguide needed for
lunar imaging? Isn't lunar tracking rate good enough? Or does the moon
wobble enough in its orbit to be an issue?

Just curious,
-- Jeff.


________________________________

From: ap-gto@yahoogroups.com [mailto:ap-gto@yahoogroups.com] On
Behalf Of digidodi
Sent: Monday, April 14, 2008 10:55 PM
To: ap-gto@yahoogroups.com
Subject: [ap-gto] Smartguide AP Mach 1 GTO question



Hi all,

Last week I received my Mach 1 GTO mount. My god, what a
mount...
perfect. Being a baby boomer, this mount couldn't be more
suitable to
my needs :) After polar alignment, a star is like glued to the
crosshair. Thank you so much Roland for this mount !

I have a little question related to the Smartguide inside the
GTO
controller. I try to explain:

Would like to use it for lunar imaging, and in a sense it works
great
for this kind of work (tried it tonight). But there is a bit of
a
nuisance to it, which may either be caused because I am not yet
familiar with it, or with a slight oversight in the
implementation.
Perhaps someone can comment on it.

When I program the smartguide and activate it, it runs really
nice,
the moon is standing still, as it should be. Now, if I want to
make a
lunar mosaic, there is a problem. I cannot seem to move the
mount by
the controls while smartguide is active. But if I stop
smartguide to
move the moon for the next mosaic frame, I loose the Smartguide
delta
movements and need to program it again. This is time consuming
and
shouldn't be necessary.

Am i missing something here, or should I use this post to ask AP
to at
least store the learned Smartguide setup till the user clears it
;) ?

Thanks for any inputs

Dodi


Re: Smartguide AP Mach 1 GTO question

Roland Christen
 

In a message dated 4/15/2008 7:55:50 AM Central Daylight Time, jey@adobe.com
writes:


Forgive what may be a stupid question, but why is Smartguide needed for
lunar imaging? Isn't lunar tracking rate good enough? Or does the moon
wobble enough in its orbit to be an issue?

The Lunar rate is only approximate. The Moon changes distance from earth so
the rate varies. Secondly, and most importantly, the Moon is either rising or
falling in Dec, so one needs to add a slow Dec movement.

Rolando


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Re: Mach1 and checking PASILL4 results

Pierre Henrotay
 

--- In ap-gto@yahoogroups.com, "Rick Wiggins" <rickwiggins@...> wrote:

Hi guys,
Thought I would chime in with one idea. Why doesn;t he borrow a
known good PASILL from a friend and try it. If that too has
problems, then it leads you one way. If that works fine, then it is
indeed a problem with the PASILL only.
What do you think?
Thanks, Rick
Thought of that of course ; but AP mounts are not that common here
(living in Belgium, Europe). In my astroclub, 200 members, only 1 chap
has a 900GTO and his polarscope - not a PASILL4 but a previous model -
and .... his reticle is cracked.

Pierre