Date   

Re: Dec motor problem

Jim Collins
 

Dec motor problem.............Oops my newbie error. Just an FYI-- it's
possible to get the control box connector plugged into the RA motor and
the RA Motor connector plugged into the control box. MY
DUMB ERROR. I realized this right after I shot-off this "Help" post.

Regards........"the cable fumbler"

Jim Collins





--- In ap-gto@..., "Jim Collins" <jimstar11gps@...> wrote:

Just got a new AP900 Goto about 2 weeks ago. It's been working fine
t'ill tonite. No response in the Dec motor (yellow Lite). RA motor
is
working fine. No voltage problem, no balance issue. Also wiggled
cable connection no luck. Either worm gear is really bound-up, broken
cable, or some other electronic issue. I will call AP for
help...............in the meantime any trouble shooting thoughts out
their.

Any help appreciated!

Regards,

Jim Collins


Re: [SPAM] RE: [SPAM] RE: [SPAM] Re: auto homing function

George Whitney <gwhitney@...>
 

Yes, we are saying the same thing. <G>

My point is simply that it can recover from a remote location without human
intervention and I think that it is an important feature to add to the AP
mounts.

George













_____

From: ap-gto@... [mailto:ap-gto@...] On Behalf Of
David B. Toth
Sent: Monday, June 18, 2007 10:54 AM
To: ap-gto@...
Subject: [SPAM] RE: [SPAM] RE: [SPAM] [ap-gto] Re: auto homing function



At 07:09 AM 6/18/2007, George Whitney wrote:
Dave,

Yes, but then all you have to do is tell it to home and then it will know
where it is. No matter what the circumstances, when you tell it to home it
will go to the preset spot and reset itself and then will continue as if
nothing happened.

George
Yes, that is true; it will actually have to GO to the home position
before it can slew to another object.
That is a rather unusual way to use the mount, and I for one have
never done it that way. I just wanted
folks to be clear that when it was moved manually, at that time it
would not know where it was.

Dave
Moderator, Paramount list


cable snag, broken wire...

Jeff <jlc@...>
 

Rolando/Marj and anyone else that may be interested...

I managed to snag the dec cable on the 1200. (My bad.)

Anyhow, I got the yellow light, and the dec motor stopped working.
Once everything was unsnagged, the dec was still misbehaving - motor run-on
if S was pressed, and yellow light if N presses (iirc).

(and this was at the start of the night.)

After disassembling the "Y" connector of the cable (i.e. the connector on
the control box), I found a disconnected green wire on the DEC cable.
There was a tiny bit of solder-tinned wire attached to the pin with RA green
wire, so I suspected this was the remainder of the DEC green wire where it
broke.
(The green DEC wire from the cable also seemed to 'point' in that direction.
...and there didnt seem to be any other place for the DEC green wire.)

So I soldered the DEC green wire to the RA green wire, assembled the
connector, and the mount seems to be working fine.

I just wanted to confirm that the green DEC wire should indeed be attached
to the green RA wire.

jeff


Re: [SPAM] RE: [SPAM] Re: auto homing function

Dr. David Toth
 

At 07:09 AM 6/18/2007, George Whitney wrote:
Dave,

Yes, but then all you have to do is tell it to home and then it will know
where it is. No matter what the circumstances, when you tell it to home it
will go to the preset spot and reset itself and then will continue as if
nothing happened.

George
Yes, that is true; it will actually have to GO to the home position before it can slew to another object.
That is a rather unusual way to use the mount, and I for one have never done it that way. I just wanted
folks to be clear that when it was moved manually, at that time it would not know where it was.

Dave
Moderator, Paramount list


Re: Dec motor problem

Roland Christen
 

In a message dated 6/18/2007 10:18:42 AM Central Daylight Time,
jimstar11gps@... writes:


Dec motor problem.............Oops my newbie error. Just an FYI-- it's
possible to get the control box connector plugged into the RA motor and
the RA Motor connector plugged into the control box. MY
DUMB ERROR. I realized this right after I shot-off this "Help" post.

Regards........"the cable fumbler"

Jim Collins
So your mount works ok now?

Rolando


**************************************
See what's free at
http://www.aol.com.


Re: Dec motor problem

Roland Christen
 

In a message dated 6/18/2007 10:01:39 AM Central Daylight Time,
jimstar11gps@... writes:


Just got a new AP900 Goto about 2 weeks ago. It's been working fine
t'ill tonite. No response in the Dec motor (yellow Lite). RA motor is
working fine. No voltage problem, no balance issue. Also wiggled
cable connection no luck. Either worm gear is really bound-up, broken
cable, or some other electronic issue.
First remove the motor gear cover. Next remove the large spur gear (ordinary
screw driver will remove the shoulder screw). Then try running the motor with
the N-S keys.

If the motor does not move, try plugging in the RA cable into the Dec motor
box and look to see if the motor moves now. If it does move, then the Dec motor
is fine and the problem is either in the cable (bad connection or loose wire
on one of the pins), or the servo box is kaput.

If the motor does not turn with the RA cable either, then there is something
wrong with the motor itself (highly unlikely).

Rolando


**************************************
See what's free at
http://www.aol.com.


Re: [SPAM] RE: [SPAM] Re: auto homing function

George Whitney <gwhitney@...>
 

Dave,

Yes, but then all you have to do is tell it to home and then it will know
where it is. No matter what the circumstances, when you tell it to home it
will go to the preset spot and reset itself and then will continue as if
nothing happened.

George















_____

From: ap-gto@... [mailto:ap-gto@...] On Behalf Of
David B. Toth
Sent: Monday, June 18, 2007 12:42 AM
To: ap-gto@...
Subject: [SPAM] RE: [SPAM] [ap-gto] Re: auto homing function



At 01:52 PM 6/17/2007, George Whitney wrote:
Rick,

Actually, the Paramount can be disengaged and moved about by hand and then
re-engaged in any position. It's not a slip clutch, but it is a clutch of
sorts.
There is no clutch at all ... those knobs disengage the worm block
... the Paramount will not know where it is if you try to move it
that way. The encoders are part of the motor and are not mounted
separately on the shaft.

Dave


Re: GPS on a German Equatorial Mount

Roland Christen
 

In a message dated 6/17/2007 9:40:33 AM Central Daylight Time,
jeguthals@... writes:


What I do is take my Garmin GPS with me
when I go to a remote location, and use its longitude and latitude
data to enter into the AP computer
Unless you are going more than 350 miles from your home base, you really
don't need to change your Lat/Long settings. All it does is affect your horizon
limits and your overhead flipover point. It does not in any way affect your
tracking or GoTo.

Rolando


**************************************
See what's free at
http://www.aol.com.


Orthagonality/alignment issues with dual scope setup

Mark Squicquero
 

I mistakenly posted this in the AP-UG group.

Hi all,

I have a general question regarding my current setup:

Ap1200GTO, AP 160, C-14, Robin Casaday tandem mounting system,
Homeyer Cradle on the C-14.

I've just begun to refine this setup and have found that there are
slight alignment issues ie the two scopes don't exactly align on the
same target. When I calibrate the mount using the Ap 160, pointing is
superb. I shimmed the C-14 between the Homeyer Cradle and the
mounting plate and it improved the alignment somewhat. ( I figured
that the AP scope/rings/ Casaday plate were probably pretty accurate
so I focused on the C-14/custom SS plate/Homeyer system). The
shimming consisted of "raising" the back of the cradle. I also found
that I had to slightly shim more one side of both the front and back
of the cradle. As I mentioned the alignment is improved but not
perfect. If I move the scopes so that one is above the other on one
side of the mount, I can move the tandem arrangement in pure dec very
slightly to bring the C-14 to target. So it appears the necessary
correction is to diverge the back of the OTA's very slightly by
shimming one side of the C-14.

My question is, how do I accomplish this? The C-14 fits very snugly
in the cradle and there doesn't appear to be any room to shim. I've
tried loosening the mounting bolts and applying pressure to one side
of the cradle and then re-tightening to no avail. My guess is that
the custom SS mounting plate, although very sturdy and cool looking,
has some wedge in it. I've read nothing but praise for the Homeyer
cradle as far as its accuracy and rigidy (which is why I purchased
it), so I don't think that is the source. Any suggestions would be
appreciated. If shimming won't work maybe I can try a different
mounting plate.

Thanks,
Mark Squicquero


Re: [SPAM] Re: auto homing function

Dr. David Toth
 

At 01:52 PM 6/17/2007, George Whitney wrote:
Rick,

Actually, the Paramount can be disengaged and moved about by hand and then
re-engaged in any position. It's not a slip clutch, but it is a clutch of
sorts.
There is no clutch at all ... those knobs disengage the worm block ... the Paramount will not know where it is if you try to move it that way. The encoders are part of the motor and are not mounted separately on the shaft.

Dave


Dec motor problem

Jim Collins
 

Just got a new AP900 Goto about 2 weeks ago. It's been working fine
t'ill tonite. No response in the Dec motor (yellow Lite). RA motor is
working fine. No voltage problem, no balance issue. Also wiggled
cable connection no luck. Either worm gear is really bound-up, broken
cable, or some other electronic issue. I will call AP for
help...............in the meantime any trouble shooting thoughts out
their.

Any help appreciated!

Regards,

Jim Collins


Re: [SPAM] [SPAM] Re: auto homing function

George Whitney <gwhitney@...>
 

Nothing.it remains the same.

George











_____

From: ap-gto@... [mailto:ap-gto@...] On Behalf Of
Rick K
Sent: Sunday, June 17, 2007 3:58 PM
To: ap-gto@...
Subject: [SPAM] [SPAM] [ap-gto] Re: auto homing function



What happens to the "home" position?

--- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com, "George
Whitney" <gwhitney@...> wrote:

Rick,

Actually, the Paramount can be disengaged and moved about by hand
and then
re-engaged in any position. It's not a slip clutch, but it is a
clutch of
sorts.

George













_____

From: ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com
[mailto:ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com] On
Behalf Of
Rick K
Sent: Sunday, June 17, 2007 1:07 PM
To: ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com
Subject: [SPAM] [ap-gto] Re: auto homing function



Sorry, upon re-reading this response I imply that the Mach1 has no
clutches. This is not the case! It too would have to have the clutches
permanently 'locked' in a very specific position aligned to the
mechanical or electronic reset point to have a 'hard reset' or
auto-home implemented. This is the method the Paramount uses. There
are no clutches on it.

--- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com,
"Rick K"
<JunkMailGoesHere@> wrote:

With clutches, an auto-homing hard reset is impossible to use. If the
clutches are locked or removed entirely on the 900 and 1200, such as
on the Mach1, then an auto-home would be possible to implement.


--- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com,
"George
Whitney" <gwhitney@> wrote:

A new topic:

It strikes me that an auto homing function (such as on the
Paramount) might
be the most important new feature for AP mounts. It would allow for
recovery
from any major malfunction and thus allow for true remote
observatory use.

Ideas?

George










[SPAM] Re: auto homing function

observe_m13
 

What happens to the "home" position?

--- In ap-gto@..., "George Whitney" <gwhitney@...> wrote:

Rick,

Actually, the Paramount can be disengaged and moved about by hand
and then
re-engaged in any position. It's not a slip clutch, but it is a
clutch of
sorts.

George













_____

From: ap-gto@... [mailto:ap-gto@...] On
Behalf Of
Rick K
Sent: Sunday, June 17, 2007 1:07 PM
To: ap-gto@...
Subject: [SPAM] [ap-gto] Re: auto homing function



Sorry, upon re-reading this response I imply that the Mach1 has no
clutches. This is not the case! It too would have to have the clutches
permanently 'locked' in a very specific position aligned to the
mechanical or electronic reset point to have a 'hard reset' or
auto-home implemented. This is the method the Paramount uses. There
are no clutches on it.

--- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com,
"Rick K"
<JunkMailGoesHere@> wrote:

With clutches, an auto-homing hard reset is impossible to use. If the
clutches are locked or removed entirely on the 900 and 1200, such as
on the Mach1, then an auto-home would be possible to implement.


--- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com,
"George
Whitney" <gwhitney@> wrote:

A new topic:

It strikes me that an auto homing function (such as on the
Paramount) might
be the most important new feature for AP mounts. It would allow for
recovery
from any major malfunction and thus allow for true remote
observatory use.

Ideas?

George








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


Re: [SPAM] Re: auto homing function

George Whitney <gwhitney@...>
 

Rick,

Actually, the Paramount can be disengaged and moved about by hand and then
re-engaged in any position. It's not a slip clutch, but it is a clutch of
sorts.

George













_____

From: ap-gto@... [mailto:ap-gto@...] On Behalf Of
Rick K
Sent: Sunday, June 17, 2007 1:07 PM
To: ap-gto@...
Subject: [SPAM] [ap-gto] Re: auto homing function



Sorry, upon re-reading this response I imply that the Mach1 has no
clutches. This is not the case! It too would have to have the clutches
permanently 'locked' in a very specific position aligned to the
mechanical or electronic reset point to have a 'hard reset' or
auto-home implemented. This is the method the Paramount uses. There
are no clutches on it.

--- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com, "Rick K"
<JunkMailGoesHere@...> wrote:

With clutches, an auto-homing hard reset is impossible to use. If the
clutches are locked or removed entirely on the 900 and 1200, such as
on the Mach1, then an auto-home would be possible to implement.


--- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com, "George
Whitney" <gwhitney@> wrote:

A new topic:

It strikes me that an auto homing function (such as on the
Paramount) might
be the most important new feature for AP mounts. It would allow for
recovery
from any major malfunction and thus allow for true remote
observatory use.

Ideas?

George





Re: auto homing function

observe_m13
 

Sorry, upon re-reading this response I imply that the Mach1 has no
clutches. This is not the case! It too would have to have the clutches
permanently 'locked' in a very specific position aligned to the
mechanical or electronic reset point to have a 'hard reset' or
auto-home implemented. This is the method the Paramount uses. There
are no clutches on it.

--- In ap-gto@..., "Rick K" <JunkMailGoesHere@...> wrote:

With clutches, an auto-homing hard reset is impossible to use. If the
clutches are locked or removed entirely on the 900 and 1200, such as
on the Mach1, then an auto-home would be possible to implement.


--- In ap-gto@..., "George Whitney" <gwhitney@> wrote:

A new topic:

It strikes me that an auto homing function (such as on the
Paramount) might
be the most important new feature for AP mounts. It would allow for
recovery
from any major malfunction and thus allow for true remote
observatory use.

Ideas?

George



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


Re: auto homing function

observe_m13
 

Sorry, upon re-reading this response I imply that the Mach1 has no
clutches. This is not the case! It too would have to have the clutches
permanently 'locked' in a very specific position aligned to the
mechanical or electronic reset point to have a 'hard reset' or
auto-home implemented. This is the method the Paramount uses. There
are no clutches on it.

--- In ap-gto@..., "Rick K" <JunkMailGoesHere@...> wrote:

With clutches, an auto-homing hard reset is impossible to use. If the
clutches are locked or removed entirely on the 900 and 1200, such as
on the Mach1, then an auto-home would be possible to implement.


--- In ap-gto@..., "George Whitney" <gwhitney@> wrote:

A new topic:

It strikes me that an auto homing function (such as on the
Paramount) might
be the most important new feature for AP mounts. It would allow for
recovery
from any major malfunction and thus allow for true remote
observatory use.

Ideas?

George



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


Re: GPS on a German Equatorial Mount

observe_m13
 

I don't understand either. What does an Alt/Az mount have to do with a
proper GE? The GE will only work if polar aligned and it could really
care less where it is on earth. For visual use, polar alignment by
pointing in the general direction by looking through the polar axis
hole and centering Polaris is plenty close enough. For Goto syncing I
just power up, GOTO a star east of the meridian, manually adjust the
scope to center that star, sync on it and carry on.

For astro-photography, the closer you want to shoot to the pole, the
better the polar alignment has to be to remove field rotation. I
regularly use just the PAS to align for astrophotography for object
further from the pole than 50 degrees or more. Syncing the scope is
identical to the above.

If you are doing astro-photography closer than about 50 degrees from
the pole with long deep shots or asteroid or supernova searches or
photometry with multiple targets through the night then excellent
polar alignment is required. If you are doing long exposure
astro-photography then flipping around the sky to multiple targets is
not an issue. Tricking GTO alignment can even come in handy. Say you
have an object you want to shoot but the database goto doesn't match
your selected positioning for field composition. You can "GOTO" your
selected object, move the scope with the direction buttons to select
your field framing, "RCAL" with the keypad, move the scope away using
the keypad direction buttons to focus on a nearby star or calibrate
the guider or whatever and when done, goto that object again to place
you right back where you wanted to be. Only in the case of multiple
target solutions over the course of a night would high accuracy goto
be required. In this case mount modeling would be nice but this is
normally the purvey of a fixed instrument. As well, target selection,
mount control, and data acquisition for multiple targets is really the
forte of computer software. If you have a computer then there is a lot
of modeling software available for less than the cost of putting it in
a keypad that will most likely go completely unused. Remember that the
keypad is just another planetarium program and has NO input on
pointing performed by any external coumputer controlled pointing!

In summary, in my opinion, GPS data is not required by the mount.

--- In ap-gto@..., "Joel" <jeguthals@...> wrote:

Rolando,

Yes, I understand that the Celestron Alt/Az mount needs the data
supplied by the GPS to work, but it is the same data that has to
supplied to the AP900GTO and the Losmandy/Gemini systems to make
their GOTO features work. What I do is take my Garmin GPS with me
when I go to a remote location, and use its longitude and latitude
data to enter into the AP computer, and I also use the GPS to check
the clock. It is very convenient to allow the GPS to download the
data automatically as the Nexstar GPS system allows rather than enter
the data manually. Thanks.

Joel


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

In a message dated 6/16/2007 5:09:10 PM Central Daylight Time,
jeguthals@ writes:


I have a NX11GPS that I use for star
parties and the GPS feature is great--accurate location and time
data
entered automatically at the beginning of every session. No
errors.

You have a GPS in the Celestron BECAUSE it is Alt-Azimuth and
absolutely
requires it. The Celestron would NOT work without it, do you
understand this? You
cannot do without GPS in this scope, since tracking is absolutely
dependent on
your location. That does not mean that you need GPS to make your
automobile
work, or a German equatorial. GEMS have always worked just fine for
hundreds of
years before any satellites were put up there, but now that
satellites are up
there, computerized alt-az mounts are a possibility for the masses.

Rolando


**************************************
See what's free at
http://www.aol.com.


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


RA/Dec Readout was Re: New poll for ap-gto

Dennis Persyk <dpersyk@...>
 

It is on my 1200GTO thanks to two excellent, large diameter setting
circles.

Clear skies,

Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL

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


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

Would you like the current RA/Dec to be displayed on your AP mount?


Re: First images with AP1200 GTO

Kent Kirkley
 

In a message dated 6/16/07 5:46:49 PM, chris1011@... writes:


By the way, it is well known that Astrodon
filters do cause halos around bright stars. It's because of the type of
coatings
they use.

Rolando
What? Well known???

Where did that come from?
Sure, depending on optical system, I sometimes get halos around stars due to
reflections between coverslip and filters, but I don't think that only happens
with Astrodon filters.

Kent Kirkley


**************************************
See what's free at
http://www.aol.com.


Re: GPS on a German Equatorial Mount

rmdesantis <desantis.rm@...>
 

I completely agree with Norm. I bought an AP900 a few years ago to
get a premium mount that works first time, every time. I don't need
to do anything special with it aside from choosing my location. I
haven't touched the time since I bought it, and only update from my
computer (that can be wrong by a few minutes, but so what?)
periodically.


GPS is not at all necessary, and I'd hate to see anyone spend time on
this. Hand-held units that give you time and lat/long are less than
$100 - I'm going to guess here, but the upcharge for incorporating
this into the mount would probably raise the price by more than this
(this forgets the opportunity cost of having AP work on this
integration instead of something else). I'm perfectly capable, if I
choose, to update the location either through software or by direct
entry with the keypad. Takes about a minute.

USB would be very nice, and it would be convenient not to have to use
a converter. But again, there are a lot of fine usb/serial converters
out there that are likely less expensive than the upcharge that new
customers (or existing customers who want to upgrade) would face just
for the convenience of avoiding a few wires. There are many
commercial products that continue to use serial ports, so I suspect
that these converters will be around for a long time.

Bluetooth, though, might be a better choice. And this can be just as
simple as a way to power a bluetooth adapter from the mount (so you
don't have to go through batteries, which would be problematic in the
cold). There are many good bluetooth adapters that are currently
avaialable, so to me, enabling them (making them easy to use with a
power option on the mount) seems to be a great way to "modernize" the
mount. You can keep the same serial ports - so this may be the
quickest way to implement this newer technology.

I may be different from many of you, though, in that I have to take
my scope out and put it away each night I use it. So for me, the most
important thing is to save time in the setup - and that means
straightforward and quick ways to polar align (which AP provides with
its scope as well as Roland's methods) and point. So for me, a
pointing model is the most important next improvement.


Mike

--- In ap-gto@..., "Norm" <wskystalker@...> wrote:

Joe,

You are mistaken about the "exact time" concept of the GPS units.
They provide you with the standard time zone time in the readout.
The "exact time" as you put it is only used for the position
calculations. Think about it, if everyone were given their exact
local time, the units would be useless in coordinating any time-
related functions between people of slightly different locations.
Check it out, if you are on the western side of a time zone your
readout will give the same time as someone on the eastern end of
the
time zone down to the second.

Norm

P.S. On board modeling and USB(or ethernet) are the only additions
I see necessary in the AP equipment.