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Gemini 1 lost


 

Hi everybody,

We have installed one month ago a telescope in an remote observatory, before this we haven?t got any problem with the mount (Losdmandy G11 Gemini-1), but after we installed in the observatory it came the problems.

we made the aligment and everthing was going fine, but after a while (8-6 hours) the mount lost the aligment, we change the Gemini, we replace the battery, we made a new realigment, the system works one or two days an again it lost the aligment.

Even we try to charge the aligment and the Gemini doesn?t permit. Is like hand control suddendly collapsed!!

We have 12v that feed all the mount,camera, rotator….,it works by a relay (Dragonfly), we connected the computer and the power supply by the dragonfly.

We are confused with the problem of the Gemini, which could be the problem, it supposed the 12V output is fine.

Are we loosing something with the Gemini that whwn we switch off the mount the Gemini loose the aligment???

The mount is "lost", is something rlated with the warm, or cold star. The parameters of aligment are in Gemini, but I think that we made something wrong when we swith off that cause that when we restarted the mount gest "lost" and ask for a realigment.


Sonny Edmonds
 

Hopefully some of the Observatory Guys and Gals will weigh in on this.
Even when I left my mount set up, I always did a polar alignment at start up.
My logic was that things always change from night to night. Even if you negate ground vibrations, you must agree the Earth has moved in relation to the stars.
So at least a check of the PA is the first step in beginning.

--
SonnyE


(I suggest viewed in full screen)


 

The Earth moving in relation to the stars does NOT require either polar realignment?of the mount or a new pointing model. The stars are sufficiently distant that the Earth's movement in its orbit does not introduce any significant angular displacement.??

Brett

On Sat, Oct 3, 2020 at 12:39 PM Sonny Edmonds <sonnyedmonds@...> wrote:
Hopefully some of the Observatory Guys and Gals will weigh in on this.
Even when I left my mount set up, I always did a polar alignment at start up.
My logic was that things always change from night to night. Even if you negate ground vibrations, you must agree the Earth has moved in relation to the stars.
So at least a check of the PA is the first step in beginning.

--
SonnyE


(I suggest viewed in full screen)


Sonny Edmonds
 

On Sun, Oct 4, 2020 at 11:16 AM, E. Brett Waller wrote:
The Earth moving in relation to the stars does NOT require either polar realignment?of the mount or a new pointing model. The stars are sufficiently distant that the Earth's movement in its orbit does not introduce any significant angular displacement.??
?
Brett
My experience has proven otherwise, Brett.
So I run through my routine every time I begin an evening.
To me accuracy counts.
?
--
SonnyE


(I suggest viewed in full screen)


 

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I have had a G11 and a Titan on a mount in my observatory and I have always had to do a sync to a star in the east and the west to get it to land on the cross hairs of the chip. Most of the time, if your wires and cables are not dragging it should put the star on the chip somewhere. However, the cables drag cause you problems and you can see that if you try to sync on a star close to the north pole instead of one well south east or southwest.

You should not have to polar align every start up unless you change the equipment or change the balance, etc.

?

?

Aubrey

Sent from for Windows 10

?

From: Sonny Edmonds
Sent: Sunday, October 4, 2020 1:58 PM
To: [email protected]
Subject: Re: [Losmandy_users_io] Gemini 1 lost

?

On Sun, Oct 4, 2020 at 11:16 AM, E. Brett Waller wrote:

The Earth moving in relation to the stars does NOT require either polar realignment?of the mount or a new pointing model. The stars are sufficiently distant that the Earth's movement in its orbit does not introduce any significant angular displacement.??

?

Brett

My experience has proven otherwise, Brett.
So I run through my routine every time I begin an evening.
To me accuracy counts.
?
--
SonnyE


(I suggest viewed in full screen)

?


 
Edited

On Sat, Oct 3, 2020 at 09:21 PM, Bittor Zabalegi wrote:
Even we try to charge the aligment and the Gemini doesn?t permit. Is like hand control suddendly collapsed!!

Bittor

What do ?you mean “collapsed”? ?Do you mean the display went blank?

if so can you please tell me what version Gemini PCB do you have? ?.?


I ask this as some versions had a fuse F2 that has been known to cause HC to go blank. ?These were ”. ? ?Replacing fuse F2 to a new version fixed this ? The fuse is a PTC micro resettable fuse and when too much current is drawn it open circuits temporarily. ?But this causes the Gemini to reset as well


Get back on the PCB version and what type of fuse F2 you have fitted.?


cheers
?
--
Brendan