Can't adjust speed when aligning


GrayFox65@...
 

Paul,

Greetings from Fredericksburg. I noticed from a previous posting, on S.A.A I
think, that you live in nearby Williamsburg. What a marvelous historic
locale. My wife and I have visited there many times---we love the
architecture so well that we designed our house based on the Williamsburg
story-and-a-half style, complete with dormer windows on the upper floor.
Hope the seeing is good there---although truly good seeing seems to be a
rarity in Virginia, at least in the more settled areas.

You didn't mention which alignment method you are having trouble with:
Polaris, two-star or simulated star-drift. Unfortunately, because I live
among trees, I can't see to the North so I can't use the Polaris method, and
I can't see to the East so I can't use the two-star method. I'm stuck with
the simulated star drift method and can therefore only give advice on that
method. However, although it took me awhile, it does work extremely well
once mastered.

Nor did you mention eyepiece/magnification. I seem to recall that the
default N/S/E/W button speed is 64X, which, for me at least, isn't a problem
at low magnification. I always start the alignment process using a 55mm
Plossl, and ratchet up the magnification once I'm close. It takes several
seconds for a star to traverse the Plossl's 2.5 degree field at 64X. The
only eyepiece that gives me a little trouble is my 3mm Radian. At 365X,
stars do scoot by quickly. But even then, if one "taps" the N/S/E/W buttons
rather than holding them down, one can place the alignment star near the
center of the field fairly reliably.

Could it be that your controller is defective and is somehow erroneously
changing itself to a higher speed, say 300X, 600X or 1200X, rather than
staying set at 64X or at the slower settings you are entering?

Don't know what other problems you have encountered in getting precise
alignment. Fortunately, I don't have much orthogonality error. My 155 EDF,
rings, dovetail plate and Maxbright are all pretty well square. The biggest
barrier I've found is one that several of the first GTO mount owners
mentioned in the early going: loosening and then retightening the altitude
and azimuth bolts during alignment tends to move the alignment star out of
dead center in a high power eyepeice---just enough to be aggrevating. Early
on, someone suggested using two hex wrenches rather than one to tighten the
azimuth bolts simultaneously. This does indeed reduce the problem for me,
but it doesn't eliminate it completely. Also, tightening the altitude bolts
can cause some change of alignment.

However, with care one can approach perfection. As I've gotten better at
this, I've become rather insistent on putting things near the center of the
3mm Radian every time. Once one gets to that point---and it took me well
over six months to get there, during which time I made just about every
mistake that can be made---using the AP GTO mount (I have the 600E) is great
fun. My interest in observing has never been higher.

Best wishes,
Michael Masters


Paul Gustafson <drgus@...>
 

When polar aligning, a constant frustration for me is my inability to adjust
the N/E/W/S button speed when centering the alignment star. No matter what
speed I pick at the initial screen, as soon as I enter the alignment
routine, the button speed increases and makes getting the alignment star
centered very difficult. I'm tired of shooting back and forth and back and
forth until I finally get the star close to being centered.

Am I being obtuse? It's probably something simple I'm missing, but I can't
find it. Any help would be greatly appreciated.

BTW, did anyone else see the shadow transit this morning, right in the
middle of the GRS?

Regards,
Paul Gustafson

"For my part I know nothing with any certainty, but the sight of the stars
makes me dream..." -- Van Gogh


RCK <rkuberek@...>
 

Paul Gustafson wrote:

When polar aligning, a constant frustration for me is my inability to adjust
the N/E/W/S button speed when centering the alignment star. No matter what
speed I pick at the initial screen, as soon as I enter the alignment
routine, the button speed increases and makes getting the alignment star
I've wondered about this myself, but haven't figured it out. The only thing I
know
is that the older firmware didn't do this, which is the main reason I haven't
upgraded yet.

Bob Kuberek


HOWARD L LAZARUS <LAZHOW@...>
 

Hi Bob;

Just wondered about the firmware. i am still on the original firmware and
have no problem in adjusting the slew speed , that is , it never reverts
back to 64X uinless i wish it so.
My question to you what is different about the new firmware and to my
knowledge i have never gotten notice from AP inviting me to make the change
over???
Can you fill me in.
Thanks
Howard lazarus

----- Original Message -----
From: RCK <rkuberek@ix.netcom.com>
To: <ap-gto@egroups.com>
Sent: Saturday, September 18, 1999 8:18 PM
Subject: [ap-gto] Re: Can't adjust speed when aligning


Paul Gustafson wrote:

When polar aligning, a constant frustration for me is my inability to
adjust
the N/E/W/S button speed when centering the alignment star. No matter
what
speed I pick at the initial screen, as soon as I enter the alignment
routine, the button speed increases and makes getting the alignment star
I've wondered about this myself, but haven't figured it out. The only
thing I
know
is that the older firmware didn't do this, which is the main reason I
haven't
upgraded yet.

Bob Kuberek


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RCK <rkuberek@...>
 

HOWARD L LAZARUS wrote:
Hi Bob;

Just wondered about the firmware. i am still on the original firmware and
have no problem in adjusting the slew speed , that is , it never reverts
back to 64X uinless i wish it so.
My question to you what is different about the new firmware and to my
knowledge i have never gotten notice from AP inviting me to make the change
over???


Howard,

You might want to call Christine and ask. I'm not sure if I got an "official"
notice, but I'm pretty sure that Mark Wilson did. I also saw a post a while
back from Charles Sinsofsky (who, I believe, designed the firmware) that there
would be a new, new release and to wait a little longer for it. One important
difference in the new firmware, I think, is that you no longer need to slew
*manually* back to the initial calibration star when recalibrating in N-Polar
Align model.

Here is the text of Charles' post on 7/31:

Hello All,
   This most likly applies to all goto people, so the latest hand controller
code is 2.5, but i am finnishing 2.6 which will be a very bug [sic] upgrade new
features etc.

 ok first, how long to upgrade a hand controller, i suggest everyone wait
just little longer the new chip code is finnished and i am now in trhe
prcoess of setting up the internet based upgrading of the hand contorller
the chips will most likly be available from a/p in late september and soon
after the web based update system will be in place and it will be very easy
to use, I will design it that way.

 So I hope this answers some questions concerning the hand controller.

Maybe Charles would give us a status report?

Bob Kuberek


RCK <rkuberek@...>
 

RCK wrote:

HOWARD L LAZARUS wrote:

Hi Bob;

Just wondered about the firmware. i am still on the original firmware and
have no problem in adjusting the slew speed , that is , it never reverts
back to 64X uinless i wish it so.
My question to you what is different about the new firmware and to my
knowledge i have never gotten notice from AP inviting me to make the change
over???
Howard,

Further to this, the letter I received from AP dated May 27 mentions the keypad
upgrade prominently. It also lists the revisions by date and function. The 11-2-98 version
2.2 upgrade added a feature to change the button rate at five additional places.
According to this, you can push the +- key to bring up a screen to change the
button rate while in the Pick Star and Cal Star screens. Maybe this will help.

Bob Kuberek


Philip Perkins <philip@...>
 

When polar aligning, a constant frustration for me is my inability to adjust
the N/E/W/S button speed when centering the alignment star. No matter what
speed I pick at the initial screen, as soon as I enter the alignment
routine, the button speed increases and makes getting the alignment star
centered very difficult. I'm tired of shooting back and forth and back and
forth until I finally get the star close to being centered.
Paul, I think this is a known bug. I have a very similar thing with
version 2.4. Except that I steer well clear of the iterative routines,
which are hopeless unless you have excellent orthogonality of the optics
with the mount. I notice the same thing when I do a Recal (button 9) - the
star veers off in an RA direction and the guide speed changes. That, I am
afraid, is a bug. Charles said that it was being fixed in 2.5

Regards
--Philip

Philip Perkins - philip@astrocruise.com
Wiltshire UK & Luberon France
Astrocruise - http://www.astrocruise.com


Charles Sinsofsky <strfire@...>
 

Hello Everyone,

Sorry I did not respond to these questions right away, I have been VERY
busy with DSV 3.0, the upcoming downloadable Hand controller code. a new
chip will be required for your mounts but you will all be able to use thew
web site now to download the hand controller code as I bring it out. 2.6 is
well on the way to being completed.

As to changing the button speed, remember there is a somewhat hidden menu,
when ever you can press the buttons say at alignment mode, you can press the
'+-' button to bring up a speical hidden menu that allows you to adjust the
button speads from the slowest to the highest by presssing the next and
previous buttons then press the 'menu' button and you will return to exact
position you left off but the hand controller buttons will now slew the
scope much slower or faster if you like.

- charles sinsofsky

----- Original Message -----
From: RCK <rkuberek@ix.netcom.com>
To: <ap-gto@egroups.com>
Sent: Saturday, September 18, 1999 8:18 PM
Subject: [ap-gto] Re: Can't adjust speed when aligning


Paul Gustafson wrote:

When polar aligning, a constant frustration for me is my inability to
adjust
the N/E/W/S button speed when centering the alignment star. No matter
what
speed I pick at the initial screen, as soon as I enter the alignment
routine, the button speed increases and makes getting the alignment star
I've wondered about this myself, but haven't figured it out. The only
thing I
know
is that the older firmware didn't do this, which is the main reason I
haven't
upgraded yet.

Bob Kuberek


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Paul Gustafson <drgus@...>
 

As to changing the button speed, remember there is a somewhat
hidden menu,
when ever you can press the buttons say at alignment mode, you
can press the
'+-' button to bring up a special hidden menu that allows you to
adjust the
button speeds from the slowest to the highest by pressing the next and
previous buttons then press the 'menu' button and you will return to exact
position you left off but the hand controller buttons will now slew the
scope much slower or faster if you like.
To Charles and everyone else who responded, I am grateful for your help.
I'll try it next night out.

I know, I know--RTFM. :-)

Paul Gustafson


Marj <astrophy@...>
 

Paul and all GTO users,
Here is an updated version of the changes made thus far to the firmware in
the keypad and the chip located in the servo box. Charles is working on a
few enhancements and minor fixes in the keypad software which will be v2.6
when finished.

If you want to upgrade to v2.5, you have two options. If you can't wait,
send the keypad into Astro-Physics and we will reprogram it. Since we have a
new version in the wings, I recommend that you wait for our internet
download from our web site which we are planning to have in October. In
order to accomplish the download, you will need a new chip in your servo box
(we will probably charge about $30 to cover the cost of the chip, extraction
tool needed to remove current chip and shipping). These will be available in
October also and can be easily installed by the user. Then, you will be able
to upload all future upgrades to the keypad firmware from our web site
without further costs. This will make it easy for all.

UPDATES TO KEYPAD AND SERVO DRIVE CHIP
KEYPAD REVISIONS
After 6-22-98
Fixed PEM and added timer
Fix save of Dec backlash
Complete safe zone with save
Change set site location - took negatives out, added W-E and N-S (the
minus zeros were a problem).
Fixed ADS separations
Removed "size" from object data since most objects are irregular and this
data was not loaded
Fixed RA/Dec entries involving minus 0
Activate park function
Added current position function to NEXT button at Objects Menu
Reorganized and corrected search function
Recalculated lunar position (later determined this was incorrect)

7-13-98
Corrected lunar position calculation
Change focus default setting to Low to correspond with TheSky

7-15-98
Removed Display Time/LST from Setup-2 menu
Add RA Backlash to Setup-1 menu (new function)
Moved Reticle adjustment to Setup-2

7-16-98
Add N-S-E-W button function to Cal. Menu when star choice data is
displayed
Prevent observer from using N-S-E-W directional buttons in Center Polaris
screen
Put Focus selection in #2 spot in Setup1 so that people don't accidentally
change the backlash setting which was in #2 spot

7-18-98
Fix PEM (timer was not going off consistently)

7-21-98
Increased backlash compensation for 400 & 600E mounts

7-29-98
Fixed planets menu, which used to skip #1 and begin w/# 2 (if you pressed
1 accidentally, you got gibberish). Now #1 works properly for first
selection.

8-25-98 - version 2.1
Fixed sign of declination number of Southern Hemisphere objects from +
to -. Used to show + sign when displaying RA/Dec coordinates prior to go-to
action.
Will now go to objects between 0 and -1 latitude.
Save position of common object names in Tours menu. When you go to a
common object from this menu, then press Menu, the display will return to
the screen that shows the last common object you viewed. If you go to other
objects using other menus (Search, M, etc) then return to common names menu,
the display will show the last common name object you viewed. Previously, it
returned to the beginning of the common objects list each time.
Save position of Stars/Constellation in Tours menu. When you go to a star
in a chosen constellation, then press MENU, the display screen will return
to the same constellation and screen as previous entry. Previously, it
returned to the first screen of the constellation with the alpha star.
Save position of Objects/Constellation in Tours menu. When you go to an
object in a chosen constellation, then press MENU, the display screen will
return to the same constellation and object screen as previous entry.
Previously, it returned to the first screen of the constellation with the
alpha star.

9-15-98
Corrected remainder of objects that have -00 latitude (these had +00)

11-2-98 - version 2.2
Allow user to change button rate at five additional places in the program.
Pushing "+-" button brings up screen that allows you to change button rate.
Button rate can be changed when you are in these functions: "Pick star"
screen in startup procedure, 'cal star" screen in startup procedure,
"objects menu" screen, screen that displays after you slew to an object,
RA/Dec coordinates display that is accessed by next button after you slew to
object. These are places that the user is likely to need this feature. The
screen displays "guide speed: <rate> x", rates are from .25x through 1200x.
Toggle through the selections using Prev< and Next> buttons.

11-12-98
Reword screen that comes up when push "+ -" button. Used to display, i.e.
"guide speed: 64 x", now displays "button rate: 64x".

01-14-99 version 2.3 (actually downloaded in mid-December)
N Polar Calibration routine changed. Previously, the user had to manually
move the telescope to the next calibration star, and then the scope would
slew back to Polaris. Now, the user moves the scope manually to the first
star, then all subsequent movements are automatically slewed with keypad
controller. Each time you use the N-S-E-W buttons to center a star, then
press Menu, you recalibrate.
Two Star Calibration routine has been simplified. Probably easiest to
compare instructions to see the differences. Now the user goes to a star and
makes adjustments halfway with N-S-E-W buttons and the remaining half with
the alt-az adjusters. When the user selects Menu to exit, the mount
recalibrates and you can either go to another star or exit the program.

01-30-99 version 2.4
Revised park function to include Park 1, Park 2 and Park 3. When you
select one of these park positions, the mount auto-slews to one of the
following locations: Park 1 - the scope will be level and pointing north.
Park 2 - the scope will be level and pointing east. Park 3 - the scope will
point to the pole. You can use the Park 1 position (also called reference
park) with a bubble level to polar align your telescope in the daytime or
when you can't see Polaris.

06-02-99 version 2.5
Park functions work correctly in Southern Hemisphere.
Improved declination backlash range for 400GTO.
Prevent user from bypassing Startup routine in location selection and Cal.
Menu screens. In previous versions, it was possible to press MENU and escape
the Startup, however then the mount was not calibrated.
If a user still manages to bypass the Startup routine at the Cal. Star
selection screen by pressing MENU, the keypad will send the data for the
reference park position (see the manual for discussion of this postion).

SERVO DRIVE BOX REVISIONS - Chip Program
7-9-98
Solved 80% of problem - if slew with buttons to various areas of sky, the
mount gets lost when asked to slew to object. Just two areas remain that are
below mount in areas not likely to slew to.

7-16-98
Can slew anywhere in sky with buttons and mount knows where it is (used to
get lost if you were pushing N-S-E-W buttons to guide across the meridian or
when scope was below mount).
Made adjustments to allow correct movement (motors and slewing direction)
in southern hemisphere

7-17-98
Fixed PEM (was not recording properly)

10-30-98
If motor stalls more than 1 second, the drive will shut off. This is a
safety feature to prevent motor burnout in case of severe load on the motor
due to an extreme imbalance condition or if the power to the mount has been
accidentally left on and the scope has hit a hard stop.

12-18-98
The telescope can now be placed in any of 3 park positions, the power
turned off and the keypad removed. When the power and keypad are restored,
the mount will stay parked and not resume tracking until the Resume from
Park function has been entered on the keypad.

Note: We recommend removing all power cords from the mount and/or from the
wall socket to prevent damage from direct lightening strikes.

5-13-99
Horizon check - This function is normally used from the keypad. Added it
to the chip so that people who are writing software will have access to this
command code. Commands:
:ho# means on
:hq# means off
Fix communications interrupts that caused a problem when using DigitalSky
Voice and TheSky software together. This problem occurred with version 5
of TheSky.
Provides ability to download new keypad versions from our web site. This
has been tested in simulated download, but not an actual web download. This
part of the code may need revision before finalized.

07-29-99
Initialize the COM ports twice to be sure they can establish communication
consistently.

08-09-99
Allow recalibration during PEM playback without extraneous motion.

Marjorie Christen
Astro-Physics

-----Original Message-----
From: Paul Gustafson [mailto:drgus@erols.com]
Sent: Saturday, September 18, 1999 4:04 PM
To: Ap-GTO e-group;
Subject: [ap-gto] Can't adjust speed when aligning


When polar aligning, a constant frustration for me is my inability to adjust
the N/E/W/S button speed when centering the alignment star. No matter what
speed I pick at the initial screen, as soon as I enter the alignment
routine, the button speed increases and makes getting the alignment star
centered very difficult. I'm tired of shooting back and forth and back and
forth until I finally get the star close to being centered.

Am I being obtuse? It's probably something simple I'm missing, but I can't
find it. Any help would be greatly appreciated.

BTW, did anyone else see the shadow transit this morning, right in the
middle of the GRS?

Regards,
Paul Gustafson

"For my part I know nothing with any certainty, but the sight of the stars
makes me dream..." -- Van Gogh



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howard lazarus <lazhow@...>
 

Dear Marj;
When you can would you give an estimated date when the computer chip to bring
the keypad up to date to version 2.5 will be ready for shipping.
This information would be most appreciated.
Many thanks
Howard Lazarus

Marj wrote:

Paul and all GTO users,
Here is an updated version of the changes made thus far to the firmware in
the keypad and the chip located in the servo box. Charles is working on a
few enhancements and minor fixes in the keypad software which will be v2.6
when finished.

If you want to upgrade to v2.5, you have two options. If you can't wait,
send the keypad into Astro-Physics and we will reprogram it. Since we have a
new version in the wings, I recommend that you wait for our internet
download from our web site which we are planning to have in October. In
order to accomplish the download, you will need a new chip in your servo box
(we will probably charge about $30 to cover the cost of the chip, extraction
tool needed to remove current chip and shipping). These will be available in
October also and can be easily installed by the user. Then, you will be able
to upload all future upgrades to the keypad firmware from our web site
without further costs. This will make it easy for all.

UPDATES TO KEYPAD AND SERVO DRIVE CHIP
KEYPAD REVISIONS
After 6-22-98
Fixed PEM and added timer
Fix save of Dec backlash
Complete safe zone with save
Change set site location - took negatives out, added W-E and N-S (the
minus zeros were a problem).
Fixed ADS separations
Removed "size" from object data since most objects are irregular and this
data was not loaded
Fixed RA/Dec entries involving minus 0
Activate park function
Added current position function to NEXT button at Objects Menu
Reorganized and corrected search function
Recalculated lunar position (later determined this was incorrect)

7-13-98
Corrected lunar position calculation
Change focus default setting to Low to correspond with TheSky

7-15-98
Removed Display Time/LST from Setup-2 menu
Add RA Backlash to Setup-1 menu (new function)
Moved Reticle adjustment to Setup-2

7-16-98
Add N-S-E-W button function to Cal. Menu when star choice data is
displayed
Prevent observer from using N-S-E-W directional buttons in Center Polaris
screen
Put Focus selection in #2 spot in Setup1 so that people don't accidentally
change the backlash setting which was in #2 spot

7-18-98
Fix PEM (timer was not going off consistently)

7-21-98
Increased backlash compensation for 400 & 600E mounts

7-29-98
Fixed planets menu, which used to skip #1 and begin w/# 2 (if you pressed
1 accidentally, you got gibberish). Now #1 works properly for first
selection.

8-25-98 - version 2.1
Fixed sign of declination number of Southern Hemisphere objects from +
to -. Used to show + sign when displaying RA/Dec coordinates prior to go-to
action.
Will now go to objects between 0 and -1 latitude.
Save position of common object names in Tours menu. When you go to a
common object from this menu, then press Menu, the display will return to
the screen that shows the last common object you viewed. If you go to other
objects using other menus (Search, M, etc) then return to common names menu,
the display will show the last common name object you viewed. Previously, it
returned to the beginning of the common objects list each time.
Save position of Stars/Constellation in Tours menu. When you go to a star
in a chosen constellation, then press MENU, the display screen will return
to the same constellation and screen as previous entry. Previously, it
returned to the first screen of the constellation with the alpha star.
Save position of Objects/Constellation in Tours menu. When you go to an
object in a chosen constellation, then press MENU, the display screen will
return to the same constellation and object screen as previous entry.
Previously, it returned to the first screen of the constellation with the
alpha star.

9-15-98
Corrected remainder of objects that have -00 latitude (these had +00)

11-2-98 - version 2.2
Allow user to change button rate at five additional places in the program.
Pushing "+-" button brings up screen that allows you to change button rate.
Button rate can be changed when you are in these functions: "Pick star"
screen in startup procedure, 'cal star" screen in startup procedure,
"objects menu" screen, screen that displays after you slew to an object,
RA/Dec coordinates display that is accessed by next button after you slew to
object. These are places that the user is likely to need this feature. The
screen displays "guide speed: <rate> x", rates are from .25x through 1200x.
Toggle through the selections using Prev< and Next> buttons.

11-12-98
Reword screen that comes up when push "+ -" button. Used to display, i.e.
"guide speed: 64 x", now displays "button rate: 64x".

01-14-99 version 2.3 (actually downloaded in mid-December)
N Polar Calibration routine changed. Previously, the user had to manually
move the telescope to the next calibration star, and then the scope would
slew back to Polaris. Now, the user moves the scope manually to the first
star, then all subsequent movements are automatically slewed with keypad
controller. Each time you use the N-S-E-W buttons to center a star, then
press Menu, you recalibrate.
Two Star Calibration routine has been simplified. Probably easiest to
compare instructions to see the differences. Now the user goes to a star and
makes adjustments halfway with N-S-E-W buttons and the remaining half with
the alt-az adjusters. When the user selects Menu to exit, the mount
recalibrates and you can either go to another star or exit the program.

01-30-99 version 2.4
Revised park function to include Park 1, Park 2 and Park 3. When you
select one of these park positions, the mount auto-slews to one of the
following locations: Park 1 - the scope will be level and pointing north.
Park 2 - the scope will be level and pointing east. Park 3 - the scope will
point to the pole. You can use the Park 1 position (also called reference
park) with a bubble level to polar align your telescope in the daytime or
when you can't see Polaris.

06-02-99 version 2.5
Park functions work correctly in Southern Hemisphere.
Improved declination backlash range for 400GTO.
Prevent user from bypassing Startup routine in location selection and Cal.
Menu screens. In previous versions, it was possible to press MENU and escape
the Startup, however then the mount was not calibrated.
If a user still manages to bypass the Startup routine at the Cal. Star
selection screen by pressing MENU, the keypad will send the data for the
reference park position (see the manual for discussion of this postion).

SERVO DRIVE BOX REVISIONS - Chip Program
7-9-98
Solved 80% of problem - if slew with buttons to various areas of sky, the
mount gets lost when asked to slew to object. Just two areas remain that are
below mount in areas not likely to slew to.

7-16-98
Can slew anywhere in sky with buttons and mount knows where it is (used to
get lost if you were pushing N-S-E-W buttons to guide across the meridian or
when scope was below mount).
Made adjustments to allow correct movement (motors and slewing direction)
in southern hemisphere

7-17-98
Fixed PEM (was not recording properly)

10-30-98
If motor stalls more than 1 second, the drive will shut off. This is a
safety feature to prevent motor burnout in case of severe load on the motor
due to an extreme imbalance condition or if the power to the mount has been
accidentally left on and the scope has hit a hard stop.

12-18-98
The telescope can now be placed in any of 3 park positions, the power
turned off and the keypad removed. When the power and keypad are restored,
the mount will stay parked and not resume tracking until the Resume from
Park function has been entered on the keypad.

Note: We recommend removing all power cords from the mount and/or from the
wall socket to prevent damage from direct lightening strikes.

5-13-99
Horizon check - This function is normally used from the keypad. Added it
to the chip so that people who are writing software will have access to this
command code. Commands:
:ho# means on
:hq# means off
Fix communications interrupts that caused a problem when using DigitalSky
Voice and TheSky software together. This problem occurred with version 5
of TheSky.
Provides ability to download new keypad versions from our web site. This
has been tested in simulated download, but not an actual web download. This
part of the code may need revision before finalized.

07-29-99
Initialize the COM ports twice to be sure they can establish communication
consistently.

08-09-99
Allow recalibration during PEM playback without extraneous motion.

Marjorie Christen
Astro-Physics

-----Original Message-----
From: Paul Gustafson [mailto:drgus@erols.com]
Sent: Saturday, September 18, 1999 4:04 PM
To: Ap-GTO e-group;
Subject: [ap-gto] Can't adjust speed when aligning

When polar aligning, a constant frustration for me is my inability to adjust
the N/E/W/S button speed when centering the alignment star. No matter what
speed I pick at the initial screen, as soon as I enter the alignment
routine, the button speed increases and makes getting the alignment star
centered very difficult. I'm tired of shooting back and forth and back and
forth until I finally get the star close to being centered.

Am I being obtuse? It's probably something simple I'm missing, but I can't
find it. Any help would be greatly appreciated.

BTW, did anyone else see the shadow transit this morning, right in the
middle of the GRS?

Regards,
Paul Gustafson

"For my part I know nothing with any certainty, but the sight of the stars
makes me dream..." -- Van Gogh

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