Date   

Re: software for orthogonality problem - solution

gjsalyer <salyer@...>
 

Well Rolando was right. My flip problem was caused by mirror shift. I
had a 21' error in dec after a flip in a 20'x30' image. But, I also
fould an error in my focal length setting in one program. After
fixing this, Pinpoint finds the correct position after a flip so my
problem is FIXED. (well as much as any mirror shift can be "fixed" in
software).

Greg

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

In a message dated 10/22/2007 8:08:44 AM Central Daylight Time,
salyer@... writes:


Jeff, thanks for the info. I hadn't thought of using the feeler
gauge
fix. I really need to check out the exact amount of offset. It's
possible something else is wrong. Last night I did a quick check
and
I thought the error was in the dec axis rather than RA as
expected. I
then used FocusMax to get my alignment error much less than a
minute
but I was still getting a large error after the flip. If the
weather
holds, I'll spend this evening looking more carefully at the
problem.

Are you sure you are not getting mirror shift?

Rolando


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


Re: Mount is tracking fast

William Rison <werison@...>
 

Joe,
It's set to sidereal rate, I stated this in the post.
That was the first thing I checked.

William

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

William,
Your CP2 is probably set to Lunar tracking rate - change it.

Joe

----- Original Message -----
From: "William Rison" <werison@...>
To: <ap-gto@...>
Sent: Friday, November 02, 2007 8:43 AM
Subject: [ap-gto] Mount is tracking fast


Hello Everyone,

I have an AP900 with GTOCP2 microcode D Keypad 4.12.
The mount is in an observatory and I have done a star drift polar
alignment but still have a problem with tracking. The mount is
tracking fast when set to sidereal rate. I can see movement is 30
second exposures in RA. The drift is always to the East in RA, it
does not matter where I am pointed. I.E. at DEC + 50 and and DEC + 0
the star only drifts in RA to the East (tracking too fast?). The
balance of the ota is fine and the goto functions work great on both
sides of the mount. Also checked PE and the star just keeps moving
East even after the 8 minutes of the PE cycle. Any ideas on what I
can check?

Thanks,
William Rison



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Re: Mount is tracking fast

Roland Christen
 

In a message dated 11/2/2007 1:53:41 PM Central Daylight Time,
alanv12952@... writes:


Will the 'King' or 'Adaptive King' tracking rate minimize that? It's what I
had my Gemini
unit set to...

Alan
The King rate does not eliminate drift. The only way to eliminate drift
everywhere is to have a variable rate, which the CP3 controller has. The software
to set the rate is being developed at this time and will be available in the
new computer interface program.

Rolando


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Re: Mount is tracking fast

Joe Zeglinski
 

William,
Your CP2 is probably set to Lunar tracking rate - change it.

Joe

----- Original Message -----
From: "William Rison" <werison@...>
To: <ap-gto@...>
Sent: Friday, November 02, 2007 8:43 AM
Subject: [ap-gto] Mount is tracking fast


Hello Everyone,

I have an AP900 with GTOCP2 microcode D Keypad 4.12.
The mount is in an observatory and I have done a star drift polar
alignment but still have a problem with tracking. The mount is
tracking fast when set to sidereal rate. I can see movement is 30
second exposures in RA. The drift is always to the East in RA, it
does not matter where I am pointed. I.E. at DEC + 50 and and DEC + 0
the star only drifts in RA to the East (tracking too fast?). The
balance of the ota is fine and the goto functions work great on both
sides of the mount. Also checked PE and the star just keeps moving
East even after the 8 minutes of the PE cycle. Any ideas on what I
can check?

Thanks,
William Rison



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Re: Effect of temperature on backlash

Roland Christen
 

In a message dated 10/26/2007 1:23:41 PM Central Daylight Time,
richard.kinsey@... writes:


I can detect a small amount of backlash in both the RA and Dec axis of
my recently received AP1200. I am wondering whether this could be
caused by a change in temperature from the factory to the mount's
present location in my observatory where it is presently around 10
degrees C. If such a change of temperature explains the slight backlash
I can feel, perhaps I should leave it in readiness for warmer days. Any
advice would be gratefully received. Richard
Change in temperature will not cause a change in backlash. Adjust it and the
mount should work at all temperatures.

Rolando


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Re: PDI (Stokes technique applied to comet) was Re: Comet 17P Holmes...

Roland Christen
 

In a message dated 10/29/2007 9:20:34 AM Central Daylight Time,
rdcrisp@... writes:


http://www.narrowbandimaging.com/comet_17_p_holmes_stokes_page.htm

read down the page a bit and you will see an abstract from a refereed
journal speaking to use of polarization studies on comets.
Very interesting images. Thanks,

Roland


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Re: 1200gto losing time base

Roland Christen
 

In a message dated 10/29/2007 12:14:36 PM Central Daylight Time,
mizzou156@... writes:


Hello,
New to astronomy and my 1200 gto seems to have developed a
peculiar problem. If I use the keypad to initialize contact with the
mount and then switch over to external control via a windows 2000 xp os
computer, the pointing and time base gets screwed up. the computer goes
into hibernate (resting) mode after one hour of inactivity. (This is
per the windows power management system and that can be changed.)
After I reactivate the computer, it seems that the time base for the
keypad is way off from the time base of the computer. I have use the
keypad feature for getting the time/ location from the mount, when I
initiate connection with the computer.
If you use the keypad to initialize the mount, there is never a reason to
switch over to an external time base in order to control the mount from an
external program. Don't set the keypad to EXT unless you absolutely know why you are
doing this and how to do it properly. Normally the keypad should be left on
Autostart "YES" so that the servo can start up automatically at power up. Then
just link to your favorite planetarium program and do your GoTo with that
program. No need to ever place the keypad in "EXT" mode just to use an external
program.

Rolando


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Re: Interim Daylight Savings Settings (Remote Setup) - How To ??

Roland Christen
 

In a message dated 10/29/2007 11:02:55 AM Central Daylight Time,
rickwiggins@... writes:


Hi Members and Roland,
I want to know how to set up my system over the next week to deal
with the various DST issues.
I have an AP 1200 mount that is set to "Ext".
The keypad was used to turn DST "On" last spring and it is now
unplugged.
I never change my keypad settings, so I don't care if it is daylight savings
or not. I always use the keypad for startup and shut down. If you are using
external time settings from your laptop, I suggest that you use Pulse Guide for
now. It will be correct regardless of the change in date for daylight savings.
In the future we will make available a new control program for your laptop
computers that you can use as a "gateway" to the mount from any program. The
program will clean up and fix any and all errors from other programs before
sending the info to the servo.

Rolando



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Re: Mount is tracking fast

Roland Christen
 

In a message dated 11/2/2007 12:39:28 PM Central Daylight Time,
werison@... writes:


Do you know of anything else that will only cause an drift in RA and
no drift in DEC when doing the drift polar alignment?
If you are pointing to the true north pole you will have RA drift. You need
to point to the refracted pole to minimize drift. With a fixed sidereal drive
rate, you will never have zero drift in RA everywhere in the sky, just at the
zenith.

Rolando


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Re: Mount is tracking fast

Roland Christen
 

In a message dated 11/2/2007 7:44:55 AM Central Daylight Time,
werison@... writes:


I have an AP900 with GTOCP2 microcode D Keypad 4.12.
The mount is in an observatory and I have done a star drift polar
alignment but still have a problem with tracking. The mount is
tracking fast when set to sidereal rate. I can see movement is 30
second exposures in RA. The drift is always to the East in RA, it
does not matter where I am pointed. I.E. at DEC + 50 and and DEC + 0
the star only drifts in RA to the East (tracking too fast?). The
balance of the ota is fine and the goto functions work great on both
sides of the mount. Also checked PE and the star just keeps moving
East even after the 8 minutes of the PE cycle. Any ideas on what I
can check?
How long have you had this mount? Is it a used mount, new to you?

Normally you have to offset the Alt axis from the true pole to the refracted
pole in order to zero out the RA drift. I would suggest pointing your scope to
a star near the celestial equator and meridian line and then adjusting the
height of the altitude axis until the drift is zeroed out. There will always be
drift elsewhere in the sky because of atmospheric refraction. You cannot
eliminate drift entirely over the whole sky with the sidereal rate because of the
variability of refraction.

By the way, the classic drift alignment procedure that you probably used does
not eliminate RA drift because it results in the polar axis being pointed at
the true north pole rather than the refracted pole.

Rolando


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Mount is tracking fast

William Rison <werison@...>
 

Hello Everyone,

I have an AP900 with GTOCP2 microcode D Keypad 4.12.
The mount is in an observatory and I have done a star drift polar
alignment but still have a problem with tracking. The mount is
tracking fast when set to sidereal rate. I can see movement is 30
second exposures in RA. The drift is always to the East in RA, it
does not matter where I am pointed. I.E. at DEC + 50 and and DEC + 0
the star only drifts in RA to the East (tracking too fast?). The
balance of the ota is fine and the goto functions work great on both
sides of the mount. Also checked PE and the star just keeps moving
East even after the 8 minutes of the PE cycle. Any ideas on what I
can check?

Thanks,
William Rison


Re: TEC 140 + 14" LX200R on an AP1200

Gavin Bray
 

Thanks Bill and Jeff.

--- In ap-gto@..., "Jeff Young" <jey@...> wrote:

Gavin --

I have a Losmandy dovetail attached to the top of my Parallax rings
holding a Meade 16" LX200GPS OTA. On the rail rides a Tak FC-100.

The FC-100 is a doublet, and considerably smaller than 140mm, so it
probably weighs about 1/2 what the TEC does. Then agian, the 16"
OTA is
about twice the weight of the 14", and leaves the Tak's weight on a
slightly longer moment arm.

Seems to work fine. The mirror flop is enough in the SCT that you
can't
get both scopes to point to the same spot all over the sky, but the
refractors have a big enough field to mostly make up for that.

-- Jeff.


________________________________

From: ap-gto@... [mailto:ap-gto@...]
On
Behalf Of Gavin Bray
Sent: Thursday, November 01, 2007 12:28 PM
To: ap-gto@...
Subject: [ap-gto] TEC 140 + 14" LX200R on an AP1200



Hello

I have a 14" LX200R attached to an AP1200 using a set of
Parallax
Instruments rings. The setup is housed in my observatory and
I'm
very
happy with it.

I was wondering whether I could attach a dovetail plate to the
top of
the parallax rings (above the 14") and attach something like a
TEC 140
to that.

Is it feasible to mount something like a TEC 140 on top of the
14"?

Is there a better option I should be considering?

Thanks
Gavin







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


Re: portable pier height for 1200GTO

Dean S
 

Thanks all for the opinions on the pier heights. I talked with Howard and
them may be able to make one for me from a 42" tube.

Thanks,
Dean S

----- Original Message -----
From: "Louis Marchesi" <lmarchesi@...>
To: <ap-gto@...>
Sent: Thursday, November 01, 2007 6:57 PM
Subject: [ap-gto] Re: portable pier height for 1200GTO


Dean,

I opted for the 48-inch pier. I usually set the pier base on some
pavers (for leveling), so that adds a couple of inches. I need to use
a small step (about a foot tall) to get my 6-inch refractor into the
saddle. I'm vertically challenged as well, but since I do both visual
and imaging I didn't want the EP height to be too low when viewing
near the zenith.

Regards,
Lou Marchesi




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Re: portable pier height for 1200GTO

primeclash
 

Dean,

I opted for the 48-inch pier. I usually set the pier base on some
pavers (for leveling), so that adds a couple of inches. I need to use
a small step (about a foot tall) to get my 6-inch refractor into the
saddle. I'm vertically challenged as well, but since I do both visual
and imaging I didn't want the EP height to be too low when viewing
near the zenith.

Regards,
Lou Marchesi


Re: GTO Keypad Firmware

Howard Hedlund
 

Hello Harold,



The filter is supposed to work in conjunction with the horizon limits
that you can set (which are also available in v.4.12). I have not
tried this out yet, but will do so the next time I am out. I hadn't
really thought about it before, but I imagine that most people would
benefit from using a horizon limit of at least 20 degrees whenever using
the "What's up now?" function. Why waste time slewing to dim fuzzies
that are lost in the soup? You can set the horizon limit all the way
up to 50 degrees. Then "What's up now?" becomes "What's in prime
viewing location now?" ;-) Excellent suggestion!



Mag. 7 skies!



Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@... [mailto:ap-gto@...] On Behalf
Of masterson_harold
Sent: Thursday, November 01, 2007 4:34 PM
To: ap-gto@...
Subject: [ap-gto] Re: GTO Keypad Firmware



Howard,

Thanks. Will the control of the "What's up now" allow me to set a
filter which eliminates objects below a settable elevation angle? I
spend a lot of time slewing to objects below the local tree line.

Harold

--- In ap-gto@... <mailto:ap-gto%40yahoogroups.com> ,
"Howard" <howard@...> wrote:

Hi Harold,



I'm not Marj, but I'm pretty familiar with the v.4.20 firmware
project
and am personally beta testing the firmware. There are several
nice
additions to the already impressive functionality and reliability of
v.4.12. Most notable are some new database catalogs. (Details on
some of these are still being hammered out.) In addition, v.4.20
will
allow a wider selection of mounts including the Mach1GTO and mounts
from
Parallax and Mathis that use our GoTo system. The keypad will now
be
able to poll the mount for the ROM chip version so you no longer
have to
pull the cover off of your control box to check your chip.
The "What's
up now?" function has been greatly improved allowing far better
control
of the objects it selects. A bookmark function has been added that
allows you to program a night's worth of observing targets into a
list,
or to keep a new found favorite handy for further examination. I
used
this feature just last night with comet Holmes 17P, that I was
showing
to trick-or-treaters. I only had to enter the RA and dec once,
then I
bookmarked it, and all night long I could slew around to different
objects and always get back to the comet very quickly. All the
ghouls
and goblins were really impressed!



Mag. 7 skies!



Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@... <mailto:ap-gto%40yahoogroups.com>
[mailto:ap-gto@... <mailto:ap-gto%40yahoogroups.com> ] On
Behalf
Of masterson_harold
Sent: Thursday, November 01, 2007 3:12 PM
To: ap-gto@... <mailto:ap-gto%40yahoogroups.com>
Subject: [ap-gto] Re: GTO Keypad Firmware



Marj,

Any hints on what 4.2 will include?

Harold

--- In ap-gto@... <mailto:ap-gto%40yahoogroups.com>
<mailto:ap-gto%
40yahoogroups.com> , "Marj
Christen" <marj@> wrote:

Hi Larry,

We are planning to finish up the 4.2 keypad code soon, then will
release it to the beta group. After beta, we will have it
available
on our website for downloading.

Marj Christen
Astro-Physics



--- In ap-gto@... <mailto:ap-gto%40yahoogroups.com>
<mailto:ap-gto%40yahoogroups.com> ,
"Larry Phillips" <llp41astro@>
wrote:

Can anyone tell me if version 4.12 of the GTO Keypad firmware
is
still
shipping with the current Mach1GTO mount or has there been an
update
released?

I read somewhere that it is to be updated soon. If so, when
will
Mach1GTO mounts have the updated firmware included when shipped?

Also, will the next update of the firmware require changes to
the
manual?

Larry






Re: Mach1 critique in S&T Dec 2007

Elenillor
 

I got my October S&T on 10/31. I will not be renewing my subscription
when it expires. The much higher international subscription rate
should cover the cost of something a little faster than a slow boat to
Japan. May not renew when I get back to the US.

--- In ap-gto@..., "Larry Phillips" <llp41astro@...> wrote:

Your December issue is the one that should have just arrived. The
November issue has been out for a month.

Larry

--- In ap-gto@..., Gerald Sargent <sargentg@> wrote:

The Nov issue of S&T has just arrived and the "next month's contents"
does not mention it. Likewise the contents list for the Dec issue of
Sky &Telescope, vol 114, No 6 on the "www.skypub.com" website
does not mention the Mach 1.
What have I got wrong please ? Gerald


Re: GTO Keypad Firmware

Joe Zeglinski
 

Sounds like it would be nice to have uploadable catalogs, that we could
swap space with existing ones that might not be in someone's particular field
of interest or study.

Joe

----- Original Message -----
From: "ayiomamitis" <ayiomami@...>
To: <ap-gto@...>
Sent: Thursday, November 01, 2007 5:06 PM
Subject: [ap-gto] Re: GTO Keypad Firmware


--- In ap-gto@..., "Jeff Young" <jey@...> wrote:

Howard --

The new bookmark feature sounds great.

As far as the catalogs go, I'd love to see Arp, Hickson's, the Abell
PNs, and the rest of the ADS catalog. Palomar might be cool too, but I
can't seem to see most of them....
Me too as far as Arp and Abell .... hhmmm, poll time .... give me a
few minutes. :-)

Anthony.


Cheers,
-- Jeff.



________________________________

From: ap-gto@... [mailto:ap-gto@...] On
Behalf Of Howard
Sent: Thursday, November 01, 2007 8:28 PM
To: ap-gto@...
Subject: RE: [ap-gto] Re: GTO Keypad Firmware



Hi Harold,

I'm not Marj, but I'm pretty familiar with the v.4.20 firmware
project
and am personally beta testing the firmware. There are several
nice
additions to the already impressive functionality and
reliability of
v.4.12. Most notable are some new database catalogs. (Details on
some of these are still being hammered out.) In addition, v.4.20
will
allow a wider selection of mounts including the Mach1GTO and
mounts from
Parallax and Mathis that use our GoTo system. The keypad will
now be
able to poll the mount for the ROM chip version so you no longer
have to
pull the cover off of your control box to check your chip. The
"What's
up now?" function has been greatly improved allowing far better
control
of the objects it selects. A bookmark function has been added
that
allows you to program a night's worth of observing targets into
a list,
or to keep a new found favorite handy for further examination. I
used
this feature just last night with comet Holmes 17P, that I was
showing
to trick-or-treaters. I only had to enter the RA and dec once,
then I
bookmarked it, and all night long I could slew around to
different
objects and always get back to the comet very quickly. All the
ghouls
and goblins were really impressed!

Mag. 7 skies!

Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@... <mailto:ap-gto%40yahoogroups.com>
[mailto:ap-gto@... <mailto:ap-gto%40yahoogroups.com> ] On
Behalf
Of masterson_harold
Sent: Thursday, November 01, 2007 3:12 PM
To: ap-gto@... <mailto:ap-gto%40yahoogroups.com>
Subject: [ap-gto] Re: GTO Keypad Firmware

Marj,

Any hints on what 4.2 will include?

Harold

--- In ap-gto@... <mailto:ap-gto%40yahoogroups.com>
<mailto:ap-gto%40yahoogroups.com> , "Marj
Christen" <marj@> wrote:

Hi Larry,

We are planning to finish up the 4.2 keypad code soon, then
will
release it to the beta group. After beta, we will have it
available
on our website for downloading.

Marj Christen
Astro-Physics



--- In ap-gto@...
<mailto:ap-gto%40yahoogroups.com> <mailto:ap-gto%40yahoogroups.com> ,
"Larry Phillips" <llp41astro@>
wrote:

Can anyone tell me if version 4.12 of the GTO Keypad
firmware is
still
shipping with the current Mach1GTO mount or has there been
an
update
released?

I read somewhere that it is to be updated soon. If so, when
will
Mach1GTO mounts have the updated firmware included when
shipped?

Also, will the next update of the firmware require changes
to the
manual?

Larry












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




Re: GTO Keypad Firmware

masterson_harold <hfm5022@...>
 

Howard,

Thanks. Will the control of the "What's up now" allow me to set a
filter which eliminates objects below a settable elevation angle? I
spend a lot of time slewing to objects below the local tree line.

Harold

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

Hi Harold,



I'm not Marj, but I'm pretty familiar with the v.4.20 firmware
project
and am personally beta testing the firmware. There are several
nice
additions to the already impressive functionality and reliability of
v.4.12. Most notable are some new database catalogs. (Details on
some of these are still being hammered out.) In addition, v.4.20
will
allow a wider selection of mounts including the Mach1GTO and mounts
from
Parallax and Mathis that use our GoTo system. The keypad will now
be
able to poll the mount for the ROM chip version so you no longer
have to
pull the cover off of your control box to check your chip.
The "What's
up now?" function has been greatly improved allowing far better
control
of the objects it selects. A bookmark function has been added that
allows you to program a night's worth of observing targets into a
list,
or to keep a new found favorite handy for further examination. I
used
this feature just last night with comet Holmes 17P, that I was
showing
to trick-or-treaters. I only had to enter the RA and dec once,
then I
bookmarked it, and all night long I could slew around to different
objects and always get back to the comet very quickly. All the
ghouls
and goblins were really impressed!



Mag. 7 skies!



Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@... [mailto:ap-gto@...] On
Behalf
Of masterson_harold
Sent: Thursday, November 01, 2007 3:12 PM
To: ap-gto@...
Subject: [ap-gto] Re: GTO Keypad Firmware



Marj,

Any hints on what 4.2 will include?

Harold

--- In ap-gto@... <mailto:ap-gto%
40yahoogroups.com> , "Marj
Christen" <marj@> wrote:

Hi Larry,

We are planning to finish up the 4.2 keypad code soon, then will
release it to the beta group. After beta, we will have it
available
on our website for downloading.

Marj Christen
Astro-Physics



--- In ap-gto@... <mailto:ap-gto%40yahoogroups.com> ,
"Larry Phillips" <llp41astro@>
wrote:

Can anyone tell me if version 4.12 of the GTO Keypad firmware
is
still
shipping with the current Mach1GTO mount or has there been an
update
released?

I read somewhere that it is to be updated soon. If so, when
will
Mach1GTO mounts have the updated firmware included when shipped?

Also, will the next update of the firmware require changes to
the
manual?

Larry




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


New poll for ap-gto

ap-gto@...
 

Enter your vote today! A new poll has been created for the
ap-gto group:

Which catalog(s) would you like to see added to the keypad software?

o Abell Planetary Nebulae
o Barnard Dark Nebulae
o Lynd's Dark Nebulae
o Sharpless catalog of emission nebulae
o van den Berg's nebula catalog
o Arp's Catalog of Peculiar Galaxies
o Caldwell catalog of deep-sky objects
o Other catalog not referenced above


To vote, please visit the following web page:
http://groups.yahoo.com/group/ap-gto/surveys?id=2603433

Note: Please do not reply to this message. Poll votes are
not collected via email. To vote, you must go to the Yahoo! Groups
web site listed above.

Thanks!


New poll for ap-gto

ap-gto@...
 

Enter your vote today! A new poll has been created for the
ap-gto group:

Which catalog(s) would you like to see added to the keypad software?

o Abell Planetary Nebulae
o Barnard Dark Nebulae
o Lynd's Dark Nebulae
o Sharpless catalog of emission nebulae
o van den Berg's nebula catalog
o Arp's Catalog of Peculiar Galaxies
o Caldwell catalog of deep-sky objects
o Other catalog not referenced above


To vote, please visit the following web page:
http://groups.yahoo.com/group/ap-gto/surveys?id=2603419

Note: Please do not reply to this message. Poll votes are
not collected via email. To vote, you must go to the Yahoo! Groups
web site listed above.

Thanks!