Date   

Re: AP 900 GTO CP3 Dec Motor Stall and Worm Gear Adjustment?

Hank Sielski
 

Rolando,

Thanks! I think I'll try upgrading my battery before I start messing with
the worm gear adjustment. Do you think 35AH is big enough (just mount, no
camera/dew heater)?

If I still have trouble, I'll talk with Howard and Wally...

Regards,

Hank

On Mon, Jul 7, 2008 at 4:42 PM, <chris1011@...> wrote:

In a message dated 7/7/2008 6:06:10 PM Central Daylight Time,
hsielski@... <hsielski%40gmail.com> writes:

After about 4 or 5 hours of observing and slewing around, the Dec motor
stalled and the yellow light came on. I'm thinking that this may be due
to
my battery voltage getting low (I have one of the little Kendrick
batteries
that you used to sell) possibly combined with a slight "tightness" on the
worm gear mesh (since it always seems to be the Dec axis, and you recall
I
had a slight problem with this a couple of months ago).
Those batteries don't last very long. What you need is a big marine battery

from one of the big box stores. Cost is around $45 to $65, so it's not
expensive. Reason why it seems to stall when using Dec is that RA is always
powered,
running the mount in sidereal mode. When you add Dec, you are increasing
the
current draw because now both axes are drawing power. This may put it above
the
threshhold of the battery, where it then begins to die.

Rolando

**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
(http://autos.aol.com/used?ncid=aolaut00050000000007)





AP 900 GTO CP3 Dec Motor Stall and Worm Gear Adjustment?

Hank Sielski
 

Hi Howard,

I just got back from the Golden State Star Party and had a couple of great
nights with my AP155 EDFS and the AP900 GTO CP3 (no 594 from early 2006). I
finally managed to see all the Messier and Caldwell objects (and a bunch of
other stuff) around Sagittarius and Scorpio, but I had a slight problem with
a stall in the Dec motor at the end of each night.

After about 4 or 5 hours of observing and slewing around, the Dec motor
stalled and the yellow light came on. I'm thinking that this may be due to
my battery voltage getting low (I have one of the little Kendrick batteries
that you used to sell) possibly combined with a slight "tightness" on the
worm gear mesh (since it always seems to be the Dec axis, and you recall I
had a slight problem with this a couple of months ago).

Until recently, I've never had a problem going even a couple of nights with
this little battery (I don't image or use a dew heater), but I'm thinking
that after 2 plus years it may be getting a bit tired and it might be a good
idea to replace/augment this battery with some kind of heavy duty marine/AGM
battery with more capacity. Do you have any recommendations here?

On the worm gear adjustments, I went to the web site and it seems that I
can't see where Wally may have updated the 900 instructions for the newer
motor brackets/configurations yet. Do have a link to them or do you think
it would be OK to use the ones for the 1200 in the mean time?

Thanks for the great products and support!

Hank in Sunnyvale


Re: Mount Will Not Connect To Computer

Howard Hedlund
 

Two reversing or null modem cables hooked together can effectively make
a single straight through cable. The cables would have only worked
when hooked together in tandem, and could not possibly work
individually. Having only one of the cables fail would then leave you
in a fatal situation. An easy test is to check continuity from each
numbered pin to its corresponding numbered hole at the other end of the
cable.



Mag. 7 skies!



Howard Hedlund

Astro-Physics, Inc.

815-282-1513

________________________________

From: ap-gto@... [mailto:ap-gto@...] On Behalf
Of Marj
Sent: Monday, July 07, 2008 4:37 PM
To: ap-gto@...
Subject: RE: [ap-gto] Mount Will Not Connect To Computer



Remember that the cables that you use MUST be the straight-thru type. We
now sell 15' cables for the convenience of our customers (so you don't
have to run all over town to find them).


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

-----Original Message-----
From: ap-gto@... <mailto:ap-gto%40yahoogroups.com>
[mailto:ap-gto@... <mailto:ap-gto%40yahoogroups.com> ]On
Behalf Of Bill Bradford
Sent: Monday, July 07, 2008 4:27 PM
To: ap-gto@... <mailto:ap-gto%40yahoogroups.com>
Subject: Re: [ap-gto] Mount Will Not Connect To Computer

I tried both com ports on the mount and I am using a native serial port
on my computer. I also tried to connect using another computer and had
the same error message.

My set up has two 4 ft long serial cables in series. So, tried each
cable separately to make sure that I did not have a cable failure. I
figured that it is highly unlikely for two cables to fail at the same
time.

I will be back from the dark site tonight and will call you guys
tomorrow or the next day about possible additional testing I can do. I
will do an echo test (as suggested by a group member) using Windows
HyperTerminal to totally rule out the computers and cables. Although, it
also seems unlikely that there would be a port problem on both
computers.

At the suggestion of another group member I also tried to connect using
PulseGuide vs. just The Sky. PulseGuide also gave the mount not
responding error message.

The good news is that I am better at using the hand controller now. :>)
Unlike my Tak mount, where the loss of computer control would seriously
limit my ability to get on faint targets for photography, using the AP
hand controller allowed me to image okay with just the additional time
necessary to enter RA and Dec for stars not in the controller's
catalogue. A small price for the ability to image as usual.

Bill

----- Original Message -----
From: chris1011@aol. <mailto:chris1011%40aol.com> com
To: ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com
Sent: Monday, July 07, 2008 9:28 AM
Subject: Re: [ap-gto] Mount Will Not Connect To Computer

In a message dated 7/5/2008 7:59:45 PM Central Daylight Time,
bcbradford@gmail. <mailto:bcbradford%40gmail.com> com writes:

Last night I had connected my Mach1 (new...have had it for 6 weeks) to
The
Sky, as I usually do, and was testing the connection by using the Move
command in The Sky and everything was doing fine.

However, after a minute or so of moving each mount axis, the mount
would no
longer take any command to move it. I removed power from the mount for
15
secs or so and tried to connect through The Sky and got an error
message
saying that the AP GoTo was not responding.
There are two com ports. Did you try them both? Also, do you have a
computer
with a com port or are you using a USB-serial converter? If so, you
might
check your converter. The com ports on the mount servo are quite rugged,
and it
would not be logical for both of them to fail simultaneaously, in fact
they do
not fail very often at all. However, a converter can suddenly fail
without
reason.

Rolando

**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
( http://autos. <http://autos.aol.com/used?ncid=aolaut00050000000007
<http://autos.aol.com/used?ncid=aolaut00050000000007> >
aol.com/used?ncid=aolaut00050000000007)


Re: Mount Will Not Connect To Computer

 

Remember that the cables that you use MUST be the straight-thru type. We now sell 15' cables for the convenience of our customers (so you don't have to run all over town to find them).


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

-----Original Message-----
From: ap-gto@... [mailto:ap-gto@...]On Behalf Of Bill Bradford
Sent: Monday, July 07, 2008 4:27 PM
To: ap-gto@...
Subject: Re: [ap-gto] Mount Will Not Connect To Computer



I tried both com ports on the mount and I am using a native serial port on my computer. I also tried to connect using another computer and had the same error message.

My set up has two 4 ft long serial cables in series. So, tried each cable separately to make sure that I did not have a cable failure. I figured that it is highly unlikely for two cables to fail at the same time.

I will be back from the dark site tonight and will call you guys tomorrow or the next day about possible additional testing I can do. I will do an echo test (as suggested by a group member) using Windows HyperTerminal to totally rule out the computers and cables. Although, it also seems unlikely that there would be a port problem on both computers.

At the suggestion of another group member I also tried to connect using PulseGuide vs. just The Sky. PulseGuide also gave the mount not responding error message.

The good news is that I am better at using the hand controller now. :>) Unlike my Tak mount, where the loss of computer control would seriously limit my ability to get on faint targets for photography, using the AP hand controller allowed me to image okay with just the additional time necessary to enter RA and Dec for stars not in the controller's catalogue. A small price for the ability to image as usual.

Bill

----- Original Message -----
From: chris1011@aol. <mailto:chris1011%40aol.com> com
To: ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com
Sent: Monday, July 07, 2008 9:28 AM
Subject: Re: [ap-gto] Mount Will Not Connect To Computer

In a message dated 7/5/2008 7:59:45 PM Central Daylight Time,
bcbradford@gmail. <mailto:bcbradford%40gmail.com> com writes:

Last night I had connected my Mach1 (new...have had it for 6 weeks) to The
Sky, as I usually do, and was testing the connection by using the Move
command in The Sky and everything was doing fine.

However, after a minute or so of moving each mount axis, the mount would no
longer take any command to move it. I removed power from the mount for 15
secs or so and tried to connect through The Sky and got an error message
saying that the AP GoTo was not responding.
There are two com ports. Did you try them both? Also, do you have a computer
with a com port or are you using a USB-serial converter? If so, you might
check your converter. The com ports on the mount servo are quite rugged, and it
would not be logical for both of them to fail simultaneaously, in fact they do
not fail very often at all. However, a converter can suddenly fail without
reason.

Rolando

**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
( http://autos. <http://autos.aol.com/used?ncid=aolaut00050000000007> aol.com/used?ncid=aolaut00050000000007)


Re: Mount Will Not Connect To Computer

Bill Bradford
 

I tried both com ports on the mount and I am using a native serial port on my computer. I also tried to connect using another computer and had the same error message.

My set up has two 4 ft long serial cables in series. So, tried each cable separately to make sure that I did not have a cable failure. I figured that it is highly unlikely for two cables to fail at the same time.

I will be back from the dark site tonight and will call you guys tomorrow or the next day about possible additional testing I can do. I will do an echo test (as suggested by a group member) using Windows HyperTerminal to totally rule out the computers and cables. Although, it also seems unlikely that there would be a port problem on both computers.

At the suggestion of another group member I also tried to connect using PulseGuide vs. just The Sky. PulseGuide also gave the mount not responding error message.

The good news is that I am better at using the hand controller now. :>) Unlike my Tak mount, where the loss of computer control would seriously limit my ability to get on faint targets for photography, using the AP hand controller allowed me to image okay with just the additional time necessary to enter RA and Dec for stars not in the controller's catalogue. A small price for the ability to image as usual.

Bill

----- Original Message -----
From: chris1011@...
To: ap-gto@...
Sent: Monday, July 07, 2008 9:28 AM
Subject: Re: [ap-gto] Mount Will Not Connect To Computer


In a message dated 7/5/2008 7:59:45 PM Central Daylight Time,
bcbradford@... writes:

> Last night I had connected my Mach1 (new...have had it for 6 weeks) to The
> Sky, as I usually do, and was testing the connection by using the Move
> command in The Sky and everything was doing fine.
>
> However, after a minute or so of moving each mount axis, the mount would no
> longer take any command to move it. I removed power from the mount for 15
> secs or so and tried to connect through The Sky and got an error message
> saying that the AP GoTo was not responding.
>

There are two com ports. Did you try them both? Also, do you have a computer
with a com port or are you using a USB-serial converter? If so, you might
check your converter. The com ports on the mount servo are quite rugged, and it
would not be logical for both of them to fail simultaneaously, in fact they do
not fail very often at all. However, a converter can suddenly fail without
reason.

Rolando

**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
(http://autos.aol.com/used?ncid=aolaut00050000000007)


Re: AP 900 GTO CP3 Dec Motor Stall and Worm Gear Adjustment?

Roland Christen
 

In a message dated 7/7/2008 7:14:55 PM Central Daylight Time,
hsielski@... writes:


Thanks! I think I'll try upgrading my battery before I start messing with
the worm gear adjustment. Do you think 35AH is big enough (just mount, no
camera/dew heater)?
35AH will give you about 35 hours of tracking and slewing.

Rolando


**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
(http://autos.aol.com/used?ncid=aolaut00050000000007)


Re: AP 900 GTO CP3 Dec Motor Stall and Worm Gear Adjustment?

Roland Christen
 

In a message dated 7/7/2008 6:06:10 PM Central Daylight Time,
hsielski@... writes:


After about 4 or 5 hours of observing and slewing around, the Dec motor
stalled and the yellow light came on. I'm thinking that this may be due to
my battery voltage getting low (I have one of the little Kendrick batteries
that you used to sell) possibly combined with a slight "tightness" on the
worm gear mesh (since it always seems to be the Dec axis, and you recall I
had a slight problem with this a couple of months ago).
Those batteries don't last very long. What you need is a big marine battery
from one of the big box stores. Cost is around $45 to $65, so it's not
expensive. Reason why it seems to stall when using Dec is that RA is always powered,
running the mount in sidereal mode. When you add Dec, you are increasing the
current draw because now both axes are drawing power. This may put it above the
threshhold of the battery, where it then begins to die.

Rolando


**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
(http://autos.aol.com/used?ncid=aolaut00050000000007)


Re: Mount Will Not Connect To Computer

Roland Christen
 

In a message dated 7/7/2008 4:27:10 PM Central Daylight Time,
bcbradford@... writes:


I tried both com ports on the mount and I am using a native serial port on
my computer.
If there is another AP mount in your area, you might try to see if your
computer will talk to it.

Rolando


**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
(http://autos.aol.com/used?ncid=aolaut00050000000007)


Re: East lurching at 64x? - Rolando

Christopher Vedeler <vedeler@...>
 

I had the backlash setting in the hand controller set to zero, but like Rob G. it would happen only when I had my PC connected and had moved from PC control to hand controller control. I looked and the ASCOM had the backlash setting of 15 seconds. I guess it was the default, which is strange.

I'll try again tonight (if it is clear).

Thanks Rob and Rolando!
Chris Vedeler


Re: East lurching at 64x? - Rolando

rbgetz
 

Based on your response, I just went and noticed my ASCOM had an RA backlash of setting of 15 seconds.  Could that be the cause in my case where the error happened after using PC control?
 
Rob

--- On Mon, 7/7/08, chris1011@... <chris1011@...> wrote:

From: chris1011@... <chris1011@...>
Subject: Re: [ap-gto] East lurching at 64x?
To: ap-gto@...
Date: Monday, July 7, 2008, 9:34 AM






In a message dated 7/7/2008 12:14:18 AM Central Daylight Time,
vedeler@earthlink. net writes:

I have an issue with my AP900 GTO2. It tracks fantastic and points
amazing. However when I am centering an object at 64x, it moves
smoothly and predictably in Dec and to the West, but when I push the
East button it jumps a few arc minutes, lurching too far East and then
quickly bouncing back. I can hear the drive motors making this erratic
movement and there is no noticeable play or slop in the RA.. The RA had
some slop which I hammered out according to the instructions on the AP
webpage. I originally though this would fix it, but I saw it again last
night.

It only happens with the hand controller as far as I know.
You probably have RA backlash dialed in. Set it to zero and this will go
away.

Rolando

************ **
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
(http://autos. aol.com/used? ncid=aolaut00050 000000007)

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


















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


Re: C11 dec balance on 900GTO

Richard Seavey
 

Dirk
Last year I had a Meade 10" SCT on a 1200GTO mount. My set-up was very tail
heavy with an STL-11000 camera, Pyxis rotator, TCFS focuser and IFW filter
wheel. I could just attain balance by using a Robin Casady 14" saddle, a
lightweight plastic dew shield and a 1 pound tube weight. I think your
options are to use a shorter saddle and/or add a metal dew shield (if you
don't use one). You may also have to add a pound or two at the front of the
OTA.

Richard

At 04:51 AM 7/7/2008 +0000, you wrote:

Hi all,
I just got me 900GTO and I love this mount. I ran into a problem with my
declination axis
balance and am hoping that someone here can point me into the right direction:

I have a C11 mounted using a Losmandy dovetail plate on the 16" A-P
DOVELM16S saddle
plate. I mounted the DOVELM16S as far forward on the dec axis as possible
(using only two
screws from the hex pattern). I have a 2" diagonal and a heavy Televue EP
attached to the
back and there is no way that I achieve dec balance if I have both saddle
plate knobs engage
the dovetail plate.

I thought about adding weight to the front of the OTA (like with the
Losmandy DWS that
seems to screw into the front part of the dovetail plate). I believe I'd
need up to extra 10lb (I
also want to be able to attach a fairly heavy TCF focuser to the back).
I'd appreciate any
experience with this setup and recommendation for what to do.

Thanks for your help
Dirk


Re: C11 dec balance on 900GTO

Joe Zeglinski
 

Hi Dirk,

Sorry to have misled you. I have the DOVELM8 on my AP900, and it does have 3 sets of holes for the two sets of knobs, so I assumed the DOVELM16S was similar. Now that I had a close look at the photo, I see that it does not.

Did you notice that your saddle has an offset pattern, so that if you are using the 2-bolt (centre line) holes to attach it, you can gain another inch or so, if you attach using the pair at the other end. Those two holes come closer to the end, with the rear hole even with the knob block.

The problem with using this saddle 180 degrees around is when you try to attach your OTA, the knobs will be vertically opposite than the other way - and so will the tip in channel. This might require more caution. Then again, this can be fixed by attaching the C11 initially pointing west rather than east; once the OTA is secured, do a 180 if you need to.

Finally, you could drill your own extra two holes or even a quad pattern, as far back as you like. I had a machinist add a couple to my DOVELM8, to make it work for me.
Likewise, you could have a pair of knob holes added at midpoint, like the spare (undocumented) set in the DOVELM8. It won't have that square "spring block" that the other two have - I think their purpose is only to provide a spring to automatically pull back the knobs - but the machinist could counter bore the outside edge of the hole into which you could add a spring to the knob shaft itself, which would do the same thing for the centre pair. Of course, you would have to buy a pair of knobs (with springs, perhaps those from the DOVELM8), from AP.

Also, have a look at Robin Casady's (8, 10, and 14 inch) saddles, especially the 14" which has holes even further back. (http://www.robincasady.com/Astro/dovetail.html). Email Robin, and seek his advice for one of his saddles. I am sure he has seen this problem many times before. One of his shorter saddles might work without modifications I listed above.

Let us know how you eventually solve the problem.

Joe

----- Original Message -----
From: "Dirk Lammerts" <dirksf@...>
To: <ap-gto@...>
Sent: Monday, July 07, 2008 2:36 AM
Subject: [ap-gto] Re: C11 dec balance on 900GTO


Hi Joe,
I immediately went to check my plate. Unfortunately, my DOVELM16S only has two contact
points. Not sure whether they changed the design at some point but the current picture on
the A-P website looks like my plate.

Dirk


Re: East lurching at 64x? - Rolando

Roland Christen
 

In a message dated 7/7/2008 12:01:30 PM Central Daylight Time,
vedeler@... writes:


I had the backlash setting in the hand controller set to zero, but like
Rob G. it would happen only when I had my PC connected and had moved
from PC control to hand controller control. I looked and the ASCOM had
the backlash setting of 15 seconds. I guess it was the default, which
is strange.
The servo always does what it is told to do by the last program which you use
to set the servo parameters. The keypad does not continually reset the
parameters in the servo. It only sets them once at power up and is then silent from
then on. Therefore it is quite logical that the keypad would say zero for
backlash, even though the servo might be set at 15 sec from another program. The
way the system works, and please remember this for ALL settings, is that
whatever peripheral program you use to command the keypad for any function, that is
the program that is active. The keypad does not muscle in and reset your
desired settings from another program. If you want the keypad settings to be
active, then use only the keypad for those settings. If you want an external program
to set the servo parameters, then the keypad steps aside and lets you do
this, but you must be aware that your external program is doing this to your
mount. The keypad will not tell you what is happening from another program. Like an
obedient servant it is silent until spoken to.

Rolando


**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
(http://autos.aol.com/used?ncid=aolaut00050000000007)


Re: East lurching at 64x?

rbgetz
 

Hi Chris,

I was just about to report the same experience I had this weekend.
I'm running CP3, v4.15. I noticed it started when ever I made
movements with either Sky6 or CCD control software. If I then go back
and use the E button on the hand controller, I get the exact same
results as you... quick forward lurch and then when I release the
button, a quick jump back. If I turned the power to the mount off and
back on, the problem goes away. but when I used PC software to guide,
it came back. I was curious if this was the case for you???

Rob G.

--- In ap-gto@..., Christopher Vedeler <vedeler@...>
wrote:

I have an issue with my AP900 GTO2. It tracks fantastic and points
amazing. However when I am centering an object at 64x, it moves
smoothly and predictably in Dec and to the West, but when I push
the
East button it jumps a few arc minutes, lurching too far East and
then
quickly bouncing back. I can hear the drive motors making this
erratic
movement and there is no noticeable play or slop in the RA.. The
RA had
some slop which I hammered out according to the instructions on the
AP
webpage. I originally though this would fix it, but I saw it again
last
night.

It only happens with the hand controller as far as I know.

Any thoughts?
Thanks!
Chris Vedeler


Re: East lurching at 64x? - Rolando

Roland Christen
 

In a message dated 7/7/2008 10:02:20 AM Central Daylight Time,
rbgetz@... writes:


Based on your response, I just went and noticed my ASCOM had an RA backlash
of setting of 15 seconds. Could that be the cause in my case where the
error happened after using PC control?
Yes, if you set your backlash for that amount, your mount will be forced to
lurch around ;^P

Rolando


**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
(http://autos.aol.com/used?ncid=aolaut00050000000007)


Re: Declination Problems Continue

Roland Christen
 

In a message dated 7/7/2008 2:23:04 AM Central Daylight Time,
twade35@... writes:



Test1
<http://www.northwest-landscapes.com/images/articles/dec_test1.jpg>

Test2
<http://www.northwest-landscapes.com/images/articles/dec_test2.jpg>

Obviously, something is wrong. Any suggestions in improving the
declination axis performance would be greatly appreciated.

Thanks,

Wade

A better tool that will show you exactly what is happening is this one on our
website under Technical Support:

Mount Troubleshooting - For additional troubleshooting tips, check the mount
and keypad manuals.
Characterizing the Dec Axis Motions (09-15-03) - PDF document. These
instructions explain how to use Maxim DL software as a tool for characterizing any
problems with the Declination axis movements of your mount.

Please follow the instructions and determine for yourself that the mount is
or is not responding the way it should. Only you can determine this because you
are there at your equipment and can analyze the situation. For others to
analyze it for you might result in lots of theories but no result.

Rolando



**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
(http://autos.aol.com/used?ncid=aolaut00050000000007)


Re: East lurching at 64x?

Roland Christen
 

In a message dated 7/7/2008 12:14:18 AM Central Daylight Time,
vedeler@... writes:


I have an issue with my AP900 GTO2. It tracks fantastic and points
amazing. However when I am centering an object at 64x, it moves
smoothly and predictably in Dec and to the West, but when I push the
East button it jumps a few arc minutes, lurching too far East and then
quickly bouncing back. I can hear the drive motors making this erratic
movement and there is no noticeable play or slop in the RA.. The RA had
some slop which I hammered out according to the instructions on the AP
webpage. I originally though this would fix it, but I saw it again last
night.

It only happens with the hand controller as far as I know.
You probably have RA backlash dialed in. Set it to zero and this will go
away.

Rolando


**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.
(http://autos.aol.com/used?ncid=aolaut00050000000007)


Re: Mount Will Not Connect To Computer

Roland Christen
 

In a message dated 7/5/2008 7:59:45 PM Central Daylight Time,
bcbradford@... writes:


Last night I had connected my Mach1 (new...have had it for 6 weeks) to The
Sky, as I usually do, and was testing the connection by using the Move
command in The Sky and everything was doing fine.

However, after a minute or so of moving each mount axis, the mount would no
longer take any command to move it. I removed power from the mount for 15
secs or so and tried to connect through The Sky and got an error message
saying that the AP GoTo was not responding.
There are two com ports. Did you try them both? Also, do you have a computer
with a com port or are you using a USB-serial converter? If so, you might
check your converter. The com ports on the mount servo are quite rugged, and it
would not be logical for both of them to fail simultaneaously, in fact they do
not fail very often at all. However, a converter can suddenly fail without
reason.

Rolando


**************
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fuel-efficient used cars.
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Re: C11 dec balance on 900GTO

Kent Kirkley
 

In a message dated 7/7/08 1:36:26 AM, dirksf@... writes:


Hi Joe,
I immediately went to check my plate. Unfortunately, my DOVELM16S only has
two contact
points. Not sure whether they changed the design at some point but the
current picture on
the A-P website looks like my plate.
Dirk:

The long DOVELM16S is probably your problem.
At first, a long saddle like the DOVELM16 seems like a good choice because it
would spread out support for the optical tube which it does, but it also
limits fore-aft movement of the OTA (unless you have a very long mounting plate)
A shorter length saddle will support your C11 just fine and allow it to be
pushed farther forward where it will balance.

Achieving balance with SCT's and RC's is a common problem because they are
'tail heavy', especially
when you hang a lot of heavy hardware on them.

Kent Kirkley



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Declination Problems Continue

twade35
 

To all,

I had an opportunity tonight to tests the declination axis after some
minor adjustments to the worm wheel. Unfortunately, I see very little
improvement. When guiding, the declination corrections in the negative
direction keep getting bigger and bigger, probably due to an inability
to actually correct them. I'm very well polar aligned so I know it's
not the problem. I was able to use PulseGuide's Backlash tests, and
here are the results:

Test1
<http://www.northwest-landscapes.com/images/articles/dec_test1.jpg>

Test2
<http://www.northwest-landscapes.com/images/articles/dec_test2.jpg>

Obviously, something is wrong. Any suggestions in improving the
declination axis performance would be greatly appreciated.

Thanks,

Wade