Date   

Re: Erratic Movement in Dec slewing

michael mcdermott <classicstone9474@...>
 

Hi Jeff, The telescope is balanced in RA and DEC, I had this problem before the disassembling of the telescope and etc. to grease the mating parts of the mount. I asked a question here about this problem I have been having. Roland told me to put grease on the spur gears and that should solve it. So I greased the gears and the mating parts of the mount. I assembled everything back on the mount. I made sure the dimensions from the stop to each counterweight was as before. I then checked both RA and DEC balancing, I could move the scope and etc. anywhere with the clutches in both released, the scope stayed wherever I put it. The mount is never under stress the green light remains green throughout this jerking. I have taken the DEC cover numerous times and actually watched the gears as I would slew "1" setting. And yes the spur gear would be jerking until about (4) seconds.My set-up is in a Sirius Observatory so I never remove any equipment except for the CCD camera. I have
dimensions from the shaft stop to counterweight location for w or w/o the camera. The balancing has been tested and is correct for viewing and imaging. Thanks however for trying to help. - Mike

Jeff Young <jey@...> wrote: Mike -

Do you have it balanced in both axes? Knowing where the weights go will
only balance the RA axis, not the Dec axis. You'd balance in Dec by
sliding the OTA fore/aft in the cradle (unless you have some weights on
the front of the cradle that you can adjust).

I can't remember, but have you looked at the LED on the servo control
box while the Dec is erratic? Does it stay one color? If you're way
out of balance you may be getting intermittent stalls producing a jerky
motion. I had this on my 16" SCT when I forgot to rebalance after
removing the (nose heavy) piggyback refractor.

A final test would be to remove the OTA and counterweights and see if it
still does it then.

-- Jeff.

From: ap-gto@... [mailto:ap-gto@...] On Behalf
Of michael mcdermott
Sent: Wednesday, June 18, 2008 7:46 PM
To: ap-gto@...
Subject: Re: [ap-gto] Erratic Movement in Dec slewing

Hi Richard, No orthogonal issues, I have had my dream machine when
imaging this does cause somewhat of an out of balance on the east side.
When I slew on "1" setting to center the image on the camera chip the
image jerks only in the N/S direction. I have my weight shaft measured
so I know where to place the weights.This works great.- Mike

Richard Seavey <reseavey@... <mailto:reseavey%40verizon.net> >
wrote: Mike
Regarding the swapped keypad, I guess I was confusing your post with the

fellow that had an autoguiding problem a few weeks ago. You say you
balanced your scope perfectly. Have you ever tried unbalancing the DEC
axis
to see if there is any difference in the way it moves? It might be that
your "perfect balance", along with some gear or bearing stiction could
cause the "jerking". What happens if you hold, say, the North button
down
for more than 4 seconds and then immediately press the South button? Do
you
ever see any orthogonal motion?

Richard

At 10:14 AM 6/18/2008 -0700, you wrote:

Hi Richard, I have not swapped out any keypad this is the original
keypad
that came with the mount 8/2006. Roland stated I have to live with it.
I
would like to know why? I am glad that yours does not do what mine
does.
The mount is perfectly balanced. I have a Meade 14" SCT mounted in an
Homeyer Cradle. The RA I have no problem with, also in a speed that is
not
"1" I have no problem with in DEC. - The gear box does make a stranger
noise while the object is "jerking" after the (4) seconds that noise
goes
away and the slew smoothes out.- Mike
Richard Seavey <<mailto:reseavey%40verizon.net>reseavey@...
<mailto:reseavey%40verizon.net> >
wrote: Mike
I own an AP1200 with the CP3 controller. My mount does not react the
way
yours does. If I press the N or S button, there is a 1-2 sec delay and
then
the star will immediately move at the correct rate, with no hesitations
(jerks) and no movement in the orthogonal (RA) direction. It does seem
that
you have some kind of problem. If I remember correctly, you swapped
keypads
with another mount and things didn't change? Did you also swap the CP3
controllers while you had access to that other mount? I can see that
you
are quite frustrated, but have hope! There is no reason that your
problem
can not be solved.

Richard

At 08:08 AM 6/18/2008 -0700, you wrote:

Hi Richard, Thanks for the concern, the object literally moves in two
directions (ie: vibrate, like a headlight in a rear view mirror that
is
loose) as the N or S button is pressed this occurs for about (4)
seconds
and starts to smooth out. I have greased the spur gears and have
checked
the mesh of the gears,as well as the set-screw on the gear that has
the
brass insert. I have made earlier post that this jerk is still here
after
doing all checks that includes making sure the backlash on the keypad
was
set at "0". If you have a mount AP1200GTO I would appreciate if you
could
follow the procedure to see if it occurs on yours. I don't think it
should
be there,mostly with what the mount cost me. Thanks, Mike

Richard Seavey
<<mailto:reseavey%40verizon.net><mailto:reseavey%40verizon.net>reseavey@
verizon.net <mailto:reseavey%40verizon.net> >

wrote: Mike
Can you go into more detail about what you mean when you say that you
see a
star "jerk back and forth" ?

Richard

At 02:35 PM 6/18/2008 +0000, you wrote:

Hi Group, I find it extremely "funny" that I can't get a response
from
a fellow AP1200GOTO CP3 owner. I would like to know if any of you
have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object ie:
star
jerk back and forth when N OR S buttons are engaged. I am being
told by
the manufacture that this is normal,and if I send it in there is NO
fix. Thanks, Mike










Re: Erratic Movement in Dec slewing

Roland Christen
 

In a message dated 6/19/2008 11:14:35 AM Central Daylight Time,
classicstone9474@... writes:


It's "funny" how often Roland & the gang respond to messages, yet besides
telling me to put grease on a spur gear, have ignored my concerns on getting
this correct.- Mike
I have been vacationing in France the last 10 days and had erratic internet
access.

Rolando


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


Re: Strange Declination Behavior

Roland Christen
 

In a message dated 6/18/2008 8:53:58 PM Central Daylight Time,
twade35@... writes:


Mark,

After manually moving it across the meridian, I would first sync it
using Pinpoint in MaximDL.
The moment you use Sync, you immediately redefine the mount/scope
orientation. By using Sync with the scope past the meridian, you are telling the mount
servo that you wish for the scope to always be below the mount for all
subsequent slews and that you have now defined the scope as the counterweight and the
counterweigh to be the scope. Subsequent use of Rcal will not change this
situation. The mount is not lost, it is pointing the counterweight perfectly to the
object each time. The scope, however, is always pointing wrong.

Rolando


**************
Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars.

(http://autos.aol.com/used?ncid=aolaut00050000000007)


Re: Erratic Movement in Dec slewing

Roland Christen
 

In a message dated 6/18/2008 12:14:54 PM Central Daylight Time,
classicstone9474@... writes:


Hi Richard, I have not swapped out any keypad this is the original keypad
that came with the mount 8/2006. Roland stated I have to live with it. I would
like to know why? I am glad that yours does not do what mine does. The mount
is perfectly balanced. I have a Meade 14" SCT mounted in an Homeyer Cradle.
The RA I have no problem with, also in a speed that is not "1" I have no
problem with in DEC.
WOAH Nellie!! Please understand some things:

1) the keypad DOES NOT CONTROL the motors. It simply sends a software command
to the servo to tell the servo to move the motors. It does NOTHING ELSE. That
software command is a 1 millisecond action, after which the keypad is totally
silent, can be disconnected, thrown on the roof, or whatever. The command has
been given and now it is up to the servo to carry out the command. This same
action can be accomplished with any external software, like on your laptop
computer, and you would not think about trying a different laptop if the command
was not followed correctly, yes?

2) once a command has been sent to the servo, then the servo will try to
carry it out. The servo loop consists of a micro that looks at the motor encoder,
and uses the signal from the encoder, compares it to the commanded speed and
tries to follow the speed command. It will increase or decrease the voltage to
the motor to keep the shaft turning at the proper rate and the signal from the
encoder constant.

Now, you initially said that the speed was not constant, which to me sounded
like it was not perfectly smooth. On a microscopic level, it is not smooth.
Now you say it buzzes and oscillates. That is a totally different thing. The
servo loop is apparently not stable. This can occur if the power supply has a
fault or the voltage is too high. I have seen some instability in the servo
before if the power supply voltage is above 18 volts (I recommend 16 volts as the
best high level, 13.5 as the best lowest voltage, although 12.5 volt batteries
will work fine except in the cold).

I have also seen instability if the power supply has poor filtering or
inductive impedance on the output terminals. You can try another power supply, or a
12 volt battery to see if the problem is still there. If it still is unstable,
then I would recommend sending the servo box back for repair. Howard can give
you a return authorization number and we can repair it quickly (assuming it
is not a power supply problem and we can recreate the instability here).

Rolando




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


Re: Erratic Movement in Dec slewing

Roland Christen
 

In a message dated 6/16/2008 1:47:51 PM Central Daylight Time,
classicstone9474@... writes:


I know it's damn near impossible to get perfect smoothly, however as I
press the number 6 button when the setting is on "1" as I look thru the eyepiece
I would not think that the star or whatever the object is would dance around
( jerk back and forth). When I have the setting on .5 or any setting above
"1" the manual slew is damn near being perfect, it slews very gracefully. Why
is just the "1" setting affecting this? - Mike
I'm not sure what you mean by pressing on the #6 button. One does not press
on this button to get the mount to move. You normally change the button speed
by pressing the +- button at the bottom to bring up the menu for changing
button speed. Then you press > or < to change this speed. Then you press either
North or South arrow buttons to make the mount move at the chosen speed. Why are
you pressing the #6 button and how does this cause the mount to move??

Rolando

Rolando


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


Re: Dec Autoguiding problem

Roland Christen
 

In a message dated 6/16/2008 11:16:02 AM Central Daylight Time,
capitoladude@... writes:


OK, got it. I take it, then, that a wide variation in axis stiffness
from one new AP900 unit to another is normal,
It is not an axis stiffness, it is simply the clutch system, which couples
the telescope to the gearwheel. There is no axis involved, it does not involve
the gears in any way, or the drive system.

Rolando


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


Re: Re : Re: Dec Autoguiding problem

Roland Christen
 

In a message dated 6/16/2008 11:10:28 AM Central Daylight Time,
capitoladude@... writes:


You had suggested the dec characterization procedure previously (in
message 21415). I did it and reported the results to you (message
22055). You said the results did not show anything out of the
ordinary.After receiving the mount initially, I had bad dec play issues and
Howard walked me through resetting the worm gear mesh over the phone.
It took out the play. He also had me check the spur gear on the end
of the worm, and it was tight.

You also had already instructed me to change the Min Max settings to
0 and 0.3, respectively, which I did in the battery of tests I
performed on 6/6/08. It had no effect on reducing the dec
oscillation.
If you read my post again, I said that this tool on the website, if you
follow it, will reveal any mechanical problems with the Dec axis. There are 3
potential problems. For each problem there is a cause. I suggest to do this test in
the orientation where you have the problem. Since the mount behaves properly
according to your test, then I conclude that perhaps there is no mechanical
problem with the mount - i.e. it is doing exactly what it should do, no more, no
less.

I also suggested several other things to check, including placing the
telescope in the orientation where you have zero guide problems and then moving the
axis via the clutches to the new position where you experience trouble. If the
trouble recurs, then we know it is not the mount because the mount mechanical
axis has not been changed - i.e. it still is oriented looking east as far as
the drive system is concerned.

These, ad others I suggested for you, are the only tests I can think of to
help you discover the basis for the problem that you are encountering. Many
times when we get a mount here that a customer reports has a problem, we discover
nothing wrong, and I can make it operate properly on the sky. So it is best if
the reason for the problem can be discovered at the customer's place, and a
lot of times it turns out to be something else.

Rolando


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


Re: Erratic Movement in Dec slewing

Jeff Young <jey@...>
 

Mike -



Do you have it balanced in both axes? Knowing where the weights go will
only balance the RA axis, not the Dec axis. You'd balance in Dec by
sliding the OTA fore/aft in the cradle (unless you have some weights on
the front of the cradle that you can adjust).



I can't remember, but have you looked at the LED on the servo control
box while the Dec is erratic? Does it stay one color? If you're way
out of balance you may be getting intermittent stalls producing a jerky
motion. I had this on my 16" SCT when I forgot to rebalance after
removing the (nose heavy) piggyback refractor.



A final test would be to remove the OTA and counterweights and see if it
still does it then.



-- Jeff.





From: ap-gto@... [mailto:ap-gto@...] On Behalf
Of michael mcdermott
Sent: Wednesday, June 18, 2008 7:46 PM
To: ap-gto@...
Subject: Re: [ap-gto] Erratic Movement in Dec slewing



Hi Richard, No orthogonal issues, I have had my dream machine when
imaging this does cause somewhat of an out of balance on the east side.
When I slew on "1" setting to center the image on the camera chip the
image jerks only in the N/S direction. I have my weight shaft measured
so I know where to place the weights.This works great.- Mike

Richard Seavey <reseavey@... <mailto:reseavey%40verizon.net> >
wrote: Mike
Regarding the swapped keypad, I guess I was confusing your post with the

fellow that had an autoguiding problem a few weeks ago. You say you
balanced your scope perfectly. Have you ever tried unbalancing the DEC
axis
to see if there is any difference in the way it moves? It might be that
your "perfect balance", along with some gear or bearing stiction could
cause the "jerking". What happens if you hold, say, the North button
down
for more than 4 seconds and then immediately press the South button? Do
you
ever see any orthogonal motion?

Richard

At 10:14 AM 6/18/2008 -0700, you wrote:

Hi Richard, I have not swapped out any keypad this is the original
keypad
that came with the mount 8/2006. Roland stated I have to live with it.
I
would like to know why? I am glad that yours does not do what mine
does.
The mount is perfectly balanced. I have a Meade 14" SCT mounted in an
Homeyer Cradle. The RA I have no problem with, also in a speed that is
not
"1" I have no problem with in DEC. - The gear box does make a stranger
noise while the object is "jerking" after the (4) seconds that noise
goes
away and the slew smoothes out.- Mike
Richard Seavey <<mailto:reseavey%40verizon.net>reseavey@...
<mailto:reseavey%40verizon.net> >
wrote: Mike
I own an AP1200 with the CP3 controller. My mount does not react the
way
yours does. If I press the N or S button, there is a 1-2 sec delay and
then
the star will immediately move at the correct rate, with no hesitations
(jerks) and no movement in the orthogonal (RA) direction. It does seem
that
you have some kind of problem. If I remember correctly, you swapped
keypads
with another mount and things didn't change? Did you also swap the CP3
controllers while you had access to that other mount? I can see that
you
are quite frustrated, but have hope! There is no reason that your
problem
can not be solved.

Richard

At 08:08 AM 6/18/2008 -0700, you wrote:

Hi Richard, Thanks for the concern, the object literally moves in two
directions (ie: vibrate, like a headlight in a rear view mirror that
is
loose) as the N or S button is pressed this occurs for about (4)
seconds
and starts to smooth out. I have greased the spur gears and have
checked
the mesh of the gears,as well as the set-screw on the gear that has
the
brass insert. I have made earlier post that this jerk is still here
after
doing all checks that includes making sure the backlash on the keypad
was
set at "0". If you have a mount AP1200GTO I would appreciate if you
could
follow the procedure to see if it occurs on yours. I don't think it
should
be there,mostly with what the mount cost me. Thanks, Mike

Richard Seavey
<<mailto:reseavey%40verizon.net><mailto:reseavey%40verizon.net>reseavey@
verizon.net <mailto:reseavey%40verizon.net> >

wrote: Mike
Can you go into more detail about what you mean when you say that you
see a
star "jerk back and forth" ?

Richard

At 02:35 PM 6/18/2008 +0000, you wrote:

Hi Group, I find it extremely "funny" that I can't get a response
from
a fellow AP1200GOTO CP3 owner. I would like to know if any of you
have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object ie:
star
jerk back and forth when N OR S buttons are engaged. I am being
told by
the manufacture that this is normal,and if I send it in there is NO
fix. Thanks, Mike










Re: Strange Declination Behavior

mgjr@...
 

Wade,

Using the Maxim "Sync" after the plate solve, is the issue. It is sending a hard sync to the mount telling it, not only where the scope
is pointing, but that the counterweight shaft is down, which it is
not. You *must* sync in Maxim when you are on the correct side of the
meridian. There is no recal for Maxim, and you cannot use the sky to
recal, unless it is sending the correct coordinates.

This will all go away, if you use the meridian delay feature.
Essentially, you are tell the mount that the meridian is x hours
shifted from it real position. Pick an x that will place your target
on the 'correct' side of your imaginary meridian, and you'll be able
to plate solve and sync and reslew to your targets coordinates w/o
issue.

Mark

Quoting twade35 <twade35@...>:

Mark,

After manually moving it across the meridian, I would first sync it
using Pinpoint in MaximDL. Then I would immediately click the
Recalibration button in TheSky. After "Recalibrating", I would then
attempt to slew to the correct imaging location which would result in
the Dec going the wrong way. I have to admit, that while clicking the
Recalibration button in TheSky nothing seemed to happen so perhaps it
isn't. I didn't use any other software or the keypad for Recalibration.

I used MaximDL for the Goto slew. Perhaps, it was still confused
(i.e. didn't recognize the Recalibrate command from TheSky. I have
MaximDL connected through TheSky.

Is there a way in TheSky to "Goto" specific coordinates (i.e. manual
entry of RA and Dec)?

Thanks,

Wade



Re: Erratic Movement in Dec slewing

michael mcdermott <classicstone9474@...>
 

Hi Don, I have ruled out mirror flop, My SCT has a mirror lock that I use, also with the DEC gear box making the unusual sound as the low speed slew is first starting out makes me think it is something else that I can't figure out. Thanks, - Mike

dmwmpd <westergren@...> wrote: Hi Mike,

Since you have an SCT, could the visual shake when you move in DEC
be mirror flop? Since RA slow motion is always one way, you
wouldn't see any in RA. A 14 inch mirror has a lot of inertia.

I have a large refractor on my 1200 and have never seen any shake
like you describe.

Don W

--- In ap-gto@..., michael mcdermott
<classicstone9474@...> wrote:

Hi Richard, I have not swapped out any keypad this is the original
keypad that came with the mount 8/2006. Roland stated I have to live
with it. I would like to know why? I am glad that yours does not do
what mine does. The mount is perfectly balanced. I have a Meade 14"
SCT mounted in an Homeyer Cradle. The RA I have no problem with,
also in a speed that is not "1" I have no problem with in DEC. - The
gear box does make a stranger noise while the object is "jerking"
after the (4) seconds that noise goes away and the slew smoothes
out.- Mike
Richard Seavey <reseavey@...> wrote: Mike
I own an AP1200 with the CP3 controller. My mount does not react
the way
yours does. If I press the N or S button, there is a 1-2 sec delay
and then
the star will immediately move at the correct rate, with no
hesitations
(jerks) and no movement in the orthogonal (RA) direction. It does
seem that
you have some kind of problem. If I remember correctly, you
swapped keypads
with another mount and things didn't change? Did you also swap the
CP3
controllers while you had access to that other mount? I can see
that you
are quite frustrated, but have hope! There is no reason that your
problem
can not be solved.

Richard

At 08:08 AM 6/18/2008 -0700, you wrote:

Hi Richard, Thanks for the concern, the object literally moves in
two
directions (ie: vibrate, like a headlight in a rear view mirror
that is
loose) as the N or S button is pressed this occurs for about (4)
seconds
and starts to smooth out. I have greased the spur gears and have
checked
the mesh of the gears,as well as the set-screw on the gear that
has the
brass insert. I have made earlier post that this jerk is still
here after
doing all checks that includes making sure the backlash on the
keypad was
set at "0". If you have a mount AP1200GTO I would appreciate if
you could
follow the procedure to see if it occurs on yours. I don't think
it should
be there,mostly with what the mount cost me. Thanks, Mike

Richard Seavey <<mailto:reseavey%40verizon.net>reseavey@...>
wrote: Mike
Can you go into more detail about what you mean when you say that
you see a
star "jerk back and forth" ?

Richard

At 02:35 PM 6/18/2008 +0000, you wrote:

Hi Group, I find it extremely "funny" that I can't get a
response from
a fellow AP1200GOTO CP3 owner. I would like to know if any of
you have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object
ie: star
jerk back and forth when N OR S buttons are engaged. I am being
told by
the manufacture that this is normal,and if I send it in there
is NO
fix. Thanks, Mike














Re: Erratic Movement in Dec slewing

observe_m13
 

jerk is still here after doing all checks that includes making sure
the backlash on the keypad was set at "0". If you have a mount

You probably need to add some dec backlash adjustment. Read that
section in the keypad manual.


Re: Erratic Movement in Dec slewing

dmwmpd <westergren@...>
 

Hi Mike,

Since you have an SCT, could the visual shake when you move in DEC
be mirror flop? Since RA slow motion is always one way, you
wouldn't see any in RA. A 14 inch mirror has a lot of inertia.

I have a large refractor on my 1200 and have never seen any shake
like you describe.

Don W

--- In ap-gto@..., michael mcdermott
<classicstone9474@...> wrote:

Hi Richard, I have not swapped out any keypad this is the original
keypad that came with the mount 8/2006. Roland stated I have to live
with it. I would like to know why? I am glad that yours does not do
what mine does. The mount is perfectly balanced. I have a Meade 14"
SCT mounted in an Homeyer Cradle. The RA I have no problem with,
also in a speed that is not "1" I have no problem with in DEC. - The
gear box does make a stranger noise while the object is "jerking"
after the (4) seconds that noise goes away and the slew smoothes
out.- Mike
Richard Seavey <reseavey@...> wrote: Mike
I own an AP1200 with the CP3 controller. My mount does not react
the way
yours does. If I press the N or S button, there is a 1-2 sec delay
and then
the star will immediately move at the correct rate, with no
hesitations
(jerks) and no movement in the orthogonal (RA) direction. It does
seem that
you have some kind of problem. If I remember correctly, you
swapped keypads
with another mount and things didn't change? Did you also swap the
CP3
controllers while you had access to that other mount? I can see
that you
are quite frustrated, but have hope! There is no reason that your
problem
can not be solved.

Richard

At 08:08 AM 6/18/2008 -0700, you wrote:

Hi Richard, Thanks for the concern, the object literally moves in
two
directions (ie: vibrate, like a headlight in a rear view mirror
that is
loose) as the N or S button is pressed this occurs for about (4)
seconds
and starts to smooth out. I have greased the spur gears and have
checked
the mesh of the gears,as well as the set-screw on the gear that
has the
brass insert. I have made earlier post that this jerk is still
here after
doing all checks that includes making sure the backlash on the
keypad was
set at "0". If you have a mount AP1200GTO I would appreciate if
you could
follow the procedure to see if it occurs on yours. I don't think
it should
be there,mostly with what the mount cost me. Thanks, Mike

Richard Seavey <<mailto:reseavey%40verizon.net>reseavey@...>
wrote: Mike
Can you go into more detail about what you mean when you say that
you see a
star "jerk back and forth" ?

Richard

At 02:35 PM 6/18/2008 +0000, you wrote:

Hi Group, I find it extremely "funny" that I can't get a
response from
a fellow AP1200GOTO CP3 owner. I would like to know if any of
you have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object
ie: star
jerk back and forth when N OR S buttons are engaged. I am being
told by
the manufacture that this is normal,and if I send it in there
is NO
fix. Thanks, Mike

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

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

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






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


Re: Strange Declination Behavior

twade35
 

Mark,

After manually moving it across the meridian, I would first sync it
using Pinpoint in MaximDL. Then I would immediately click the
Recalibration button in TheSky. After "Recalibrating", I would then
attempt to slew to the correct imaging location which would result in
the Dec going the wrong way. I have to admit, that while clicking the
Recalibration button in TheSky nothing seemed to happen so perhaps it
isn't. I didn't use any other software or the keypad for Recalibration.

I used MaximDL for the Goto slew. Perhaps, it was still confused
(i.e. didn't recognize the Recalibrate command from TheSky. I have
MaximDL connected through TheSky.

Is there a way in TheSky to "Goto" specific coordinates (i.e. manual
entry of RA and Dec)?

Thanks,

Wade


Re: Erratic Movement in Dec slewing

michael mcdermott <classicstone9474@...>
 

Hi Richard, No orthogonal issues, I have had my dream machine when imaging this does cause somewhat of an out of balance on the east side. When I slew on "1" setting to center the image on the camera chip the image jerks only in the N/S direction. I have my weight shaft measured so I know where to place the weights.This works great.- Mike

Richard Seavey <reseavey@...> wrote: Mike
Regarding the swapped keypad, I guess I was confusing your post with the
fellow that had an autoguiding problem a few weeks ago. You say you
balanced your scope perfectly. Have you ever tried unbalancing the DEC axis
to see if there is any difference in the way it moves? It might be that
your "perfect balance", along with some gear or bearing stiction could
cause the "jerking". What happens if you hold, say, the North button down
for more than 4 seconds and then immediately press the South button? Do you
ever see any orthogonal motion?

Richard

At 10:14 AM 6/18/2008 -0700, you wrote:

Hi Richard, I have not swapped out any keypad this is the original keypad
that came with the mount 8/2006. Roland stated I have to live with it. I
would like to know why? I am glad that yours does not do what mine does.
The mount is perfectly balanced. I have a Meade 14" SCT mounted in an
Homeyer Cradle. The RA I have no problem with, also in a speed that is not
"1" I have no problem with in DEC. - The gear box does make a stranger
noise while the object is "jerking" after the (4) seconds that noise goes
away and the slew smoothes out.- Mike
Richard Seavey <<mailto:reseavey%40verizon.net>reseavey@...>
wrote: Mike
I own an AP1200 with the CP3 controller. My mount does not react the way
yours does. If I press the N or S button, there is a 1-2 sec delay and then
the star will immediately move at the correct rate, with no hesitations
(jerks) and no movement in the orthogonal (RA) direction. It does seem that
you have some kind of problem. If I remember correctly, you swapped keypads
with another mount and things didn't change? Did you also swap the CP3
controllers while you had access to that other mount? I can see that you
are quite frustrated, but have hope! There is no reason that your problem
can not be solved.

Richard

At 08:08 AM 6/18/2008 -0700, you wrote:

Hi Richard, Thanks for the concern, the object literally moves in two
directions (ie: vibrate, like a headlight in a rear view mirror that is
loose) as the N or S button is pressed this occurs for about (4) seconds
and starts to smooth out. I have greased the spur gears and have checked
the mesh of the gears,as well as the set-screw on the gear that has the
brass insert. I have made earlier post that this jerk is still here after
doing all checks that includes making sure the backlash on the keypad was
set at "0". If you have a mount AP1200GTO I would appreciate if you could
follow the procedure to see if it occurs on yours. I don't think it should
be there,mostly with what the mount cost me. Thanks, Mike

Richard Seavey
<<mailto:reseavey%40verizon.net><mailto:reseavey%40verizon.net>reseavey@...>

wrote: Mike
Can you go into more detail about what you mean when you say that you see a
star "jerk back and forth" ?

Richard

At 02:35 PM 6/18/2008 +0000, you wrote:

Hi Group, I find it extremely "funny" that I can't get a response from
a fellow AP1200GOTO CP3 owner. I would like to know if any of you have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object ie: star
jerk back and forth when N OR S buttons are engaged. I am being told by
the manufacture that this is normal,and if I send it in there is NO
fix. Thanks, Mike










Re: Erratic Movement in Dec slewing

Richard Seavey
 

Mike
Regarding the swapped keypad, I guess I was confusing your post with the
fellow that had an autoguiding problem a few weeks ago. You say you
balanced your scope perfectly. Have you ever tried unbalancing the DEC axis
to see if there is any difference in the way it moves? It might be that
your "perfect balance", along with some gear or bearing stiction could
cause the "jerking". What happens if you hold, say, the North button down
for more than 4 seconds and then immediately press the South button? Do you
ever see any orthogonal motion?

Richard

At 10:14 AM 6/18/2008 -0700, you wrote:

Hi Richard, I have not swapped out any keypad this is the original keypad
that came with the mount 8/2006. Roland stated I have to live with it. I
would like to know why? I am glad that yours does not do what mine does.
The mount is perfectly balanced. I have a Meade 14" SCT mounted in an
Homeyer Cradle. The RA I have no problem with, also in a speed that is not
"1" I have no problem with in DEC. - The gear box does make a stranger
noise while the object is "jerking" after the (4) seconds that noise goes
away and the slew smoothes out.- Mike
Richard Seavey <<mailto:reseavey%40verizon.net>reseavey@...>
wrote: Mike
I own an AP1200 with the CP3 controller. My mount does not react the way
yours does. If I press the N or S button, there is a 1-2 sec delay and then
the star will immediately move at the correct rate, with no hesitations
(jerks) and no movement in the orthogonal (RA) direction. It does seem that
you have some kind of problem. If I remember correctly, you swapped keypads
with another mount and things didn't change? Did you also swap the CP3
controllers while you had access to that other mount? I can see that you
are quite frustrated, but have hope! There is no reason that your problem
can not be solved.

Richard

At 08:08 AM 6/18/2008 -0700, you wrote:

Hi Richard, Thanks for the concern, the object literally moves in two
directions (ie: vibrate, like a headlight in a rear view mirror that is
loose) as the N or S button is pressed this occurs for about (4) seconds
and starts to smooth out. I have greased the spur gears and have checked
the mesh of the gears,as well as the set-screw on the gear that has the
brass insert. I have made earlier post that this jerk is still here after
doing all checks that includes making sure the backlash on the keypad was
set at "0". If you have a mount AP1200GTO I would appreciate if you could
follow the procedure to see if it occurs on yours. I don't think it should
be there,mostly with what the mount cost me. Thanks, Mike

Richard Seavey
<<mailto:reseavey%40verizon.net><mailto:reseavey%40verizon.net>reseavey@...>

wrote: Mike
Can you go into more detail about what you mean when you say that you see a
star "jerk back and forth" ?

Richard

At 02:35 PM 6/18/2008 +0000, you wrote:

Hi Group, I find it extremely "funny" that I can't get a response from
a fellow AP1200GOTO CP3 owner. I would like to know if any of you have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object ie: star
jerk back and forth when N OR S buttons are engaged. I am being told by
the manufacture that this is normal,and if I send it in there is NO
fix. Thanks, Mike










Re: Erratic Movement in Dec slewing

michael mcdermott <classicstone9474@...>
 

Hi Richard, I have not swapped out any keypad this is the original keypad that came with the mount 8/2006. Roland stated I have to live with it. I would like to know why? I am glad that yours does not do what mine does. The mount is perfectly balanced. I have a Meade 14" SCT mounted in an Homeyer Cradle. The RA I have no problem with, also in a speed that is not "1" I have no problem with in DEC. - The gear box does make a stranger noise while the object is "jerking" after the (4) seconds that noise goes away and the slew smoothes out.- Mike
Richard Seavey <reseavey@...> wrote: Mike
I own an AP1200 with the CP3 controller. My mount does not react the way
yours does. If I press the N or S button, there is a 1-2 sec delay and then
the star will immediately move at the correct rate, with no hesitations
(jerks) and no movement in the orthogonal (RA) direction. It does seem that
you have some kind of problem. If I remember correctly, you swapped keypads
with another mount and things didn't change? Did you also swap the CP3
controllers while you had access to that other mount? I can see that you
are quite frustrated, but have hope! There is no reason that your problem
can not be solved.

Richard

At 08:08 AM 6/18/2008 -0700, you wrote:

Hi Richard, Thanks for the concern, the object literally moves in two
directions (ie: vibrate, like a headlight in a rear view mirror that is
loose) as the N or S button is pressed this occurs for about (4) seconds
and starts to smooth out. I have greased the spur gears and have checked
the mesh of the gears,as well as the set-screw on the gear that has the
brass insert. I have made earlier post that this jerk is still here after
doing all checks that includes making sure the backlash on the keypad was
set at "0". If you have a mount AP1200GTO I would appreciate if you could
follow the procedure to see if it occurs on yours. I don't think it should
be there,mostly with what the mount cost me. Thanks, Mike

Richard Seavey <<mailto:reseavey%40verizon.net>reseavey@...>
wrote: Mike
Can you go into more detail about what you mean when you say that you see a
star "jerk back and forth" ?

Richard

At 02:35 PM 6/18/2008 +0000, you wrote:

Hi Group, I find it extremely "funny" that I can't get a response from
a fellow AP1200GOTO CP3 owner. I would like to know if any of you have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object ie: star
jerk back and forth when N OR S buttons are engaged. I am being told by
the manufacture that this is normal,and if I send it in there is NO
fix. Thanks, Mike






Re: Erratic Movement in Dec slewing

Richard Seavey
 

Mike
I own an AP1200 with the CP3 controller. My mount does not react the way
yours does. If I press the N or S button, there is a 1-2 sec delay and then
the star will immediately move at the correct rate, with no hesitations
(jerks) and no movement in the orthogonal (RA) direction. It does seem that
you have some kind of problem. If I remember correctly, you swapped keypads
with another mount and things didn't change? Did you also swap the CP3
controllers while you had access to that other mount? I can see that you
are quite frustrated, but have hope! There is no reason that your problem
can not be solved.

Richard

At 08:08 AM 6/18/2008 -0700, you wrote:

Hi Richard, Thanks for the concern, the object literally moves in two
directions (ie: vibrate, like a headlight in a rear view mirror that is
loose) as the N or S button is pressed this occurs for about (4) seconds
and starts to smooth out. I have greased the spur gears and have checked
the mesh of the gears,as well as the set-screw on the gear that has the
brass insert. I have made earlier post that this jerk is still here after
doing all checks that includes making sure the backlash on the keypad was
set at "0". If you have a mount AP1200GTO I would appreciate if you could
follow the procedure to see if it occurs on yours. I don't think it should
be there,mostly with what the mount cost me. Thanks, Mike

Richard Seavey <<mailto:reseavey%40verizon.net>reseavey@...>
wrote: Mike
Can you go into more detail about what you mean when you say that you see a
star "jerk back and forth" ?

Richard

At 02:35 PM 6/18/2008 +0000, you wrote:

Hi Group, I find it extremely "funny" that I can't get a response from
a fellow AP1200GOTO CP3 owner. I would like to know if any of you have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object ie: star
jerk back and forth when N OR S buttons are engaged. I am being told by
the manufacture that this is normal,and if I send it in there is NO
fix. Thanks, Mike






Re: Erratic Movement in Dec slewing

michael mcdermott <classicstone9474@...>
 

Hi Richard, Thanks for the concern, the object literally moves in two directions (ie: vibrate, like a headlight in a rear view mirror that is loose) as the N or S button is pressed this occurs for about (4) seconds and starts to smooth out. I have greased the spur gears and have checked the mesh of the gears,as well as the set-screw on the gear that has the brass insert. I have made earlier post that this jerk is still here after doing all checks that includes making sure the backlash on the keypad was set at "0". If you have a mount AP1200GTO I would appreciate if you could follow the procedure to see if it occurs on yours. I don't think it should be there,mostly with what the mount cost me. Thanks, Mike

Richard Seavey <reseavey@...> wrote: Mike
Can you go into more detail about what you mean when you say that you see a
star "jerk back and forth" ?

Richard

At 02:35 PM 6/18/2008 +0000, you wrote:

Hi Group, I find it extremely "funny" that I can't get a response from
a fellow AP1200GOTO CP3 owner. I would like to know if any of you have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object ie: star
jerk back and forth when N OR S buttons are engaged. I am being told by
the manufacture that this is normal,and if I send it in there is NO
fix. Thanks, Mike


Re: Erratic Movement in Dec slewing

Richard Seavey
 

Mike
Can you go into more detail about what you mean when you say that you see a
star "jerk back and forth" ?

Richard

At 02:35 PM 6/18/2008 +0000, you wrote:

Hi Group, I find it extremely "funny" that I can't get a response from
a fellow AP1200GOTO CP3 owner. I would like to know if any of you have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object ie: star
jerk back and forth when N OR S buttons are engaged. I am being told by
the manufacture that this is normal,and if I send it in there is NO
fix. Thanks, Mike


Erratic Movement in Dec slewing

starclusterseeker <classicstone9474@...>
 

Hi Group, I find it extremely "funny" that I can't get a response from
a fellow AP1200GOTO CP3 owner. I would like to know if any of you have
a problem while looking thru your eyepiece and having button (6)
pressed and setting the slew to the "1" speed, does the object ie: star
jerk back and forth when N OR S buttons are engaged. I am being told by
the manufacture that this is normal,and if I send it in there is NO
fix. Thanks, Mike