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Pier side

 

Hi All

I know this is not a Losmandy specific question but since I'm STILL struggling with getting automated pier flips to work?with my Losmandy?G11 and N.I.N.A, I figured this would be a good place to start....

I've decided to go?right back to basics and ask some questions that may be construed as "silly", so bear with me.

So.... Pier side - What is it?
I know what I THINK it is, but I just want clarification so I can tick that one off my list.
Let's say that the Gemini software is saying the scope is pier side West.
Is the scope on the west side of the pier?
Is the scope on the east side of the pier but pointing west of the meridian

My belief is that in this instance, the scope would be on the west side of the pier (regardless of whether it is pointing to the east or west of the meridian). But what do I know???

--
Thanks and Best Regards
Neil
 

I think of it as where the telescope is pointing. So in the northern hemisphere, standing behind the mount, west is pointing left and east is pointing right.
?
No expert here, but I believe that is the gist of it.
?
So far as getting meridian flips working, for me it was all about the settings here:
?
?
I would tell you the settings on mine, but it isn't set up right now. If I do soon, I will post again.
?
 

Thanks for the reply, Ed

I'm in the southern hemisphere and using Gemeni 1 - not that either of those factors make an iota of difference to what pier side means..

On Sun, 2 Mar 2025, 7:48?pm Ed Harp via , <rabbit=[email protected]> wrote:
I think of it as where the telescope is pointing. So in the northern hemisphere, standing behind the mount, west is pointing left and east is pointing right.
?
No expert here, but I believe that is the gist of it.
?
So far as getting meridian flips working, for me it was all about the settings here:
?
?
I would tell you the settings on mine, but it isn't set up right now. If I do soon, I will post again.
?
 

Pier side refers to where the telescope is located referenced to the mount itself, regardless of where it’s pointing. For instance, you can have the scope on the west side of the mount pointing east and, later in the session, if your limits allow it, it will go past the meridian and be looking west. All throughout this example, the scope is pier side west.


at least I think this is the right way but, I’ve been proven wrong before so who knows? :)
 

Niel,
?
Failure to flip usually results from your mount limits not being set right:
?
please see the following Losmandy video:
?
?
John
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_____________________________________________________________________________________________________________________________________________________________________________

Losmandy G11G2 on pier; refurbed Losmandy G11 with OnStep controller; SkyShed design roll-off observatory; ZWO ASI2600MM-P; ZWO ASI071MC; Sky-Watcher Esprit 100 ED with field flattener; Celestron C925 Edge HD with 0.7XFR, William Optics Zenithstar 61 APO; PHD2, NINA, Sequence Generator Pro and PixInsight user
 

?
"Another way to think of the "side" of the pier that your scope is on -- it's the side with the center of the saddle. That seems obvious, but if your scope is long and you are near the vertical with the counterweight shaft, the aperture or opposite end of the scope may be across the meridian (or the object you're pointing at is across the meridian.) The saddle is always clearly in one side or the other. This way, it doesn't matter what you are pointing at in the sky, you're always setting a limit or a model for the side that the center of the saddle is on, not what you're looking at."
 

On 3/2/2025 11:09 AM, John Kmetz via groups.io wrote:
Niel,
Failure to flip usually results from your mount limits not being set right:
please see the following Losmandy video:
<>
John
Since a flip is simply a new GOTO after the target passes the meridian, if NINA and the mount do not agree that the target has indeed crossed the meridian the flip will fail.

In my case my failed flips were because the mount and NINA did not agree precisely on location and time.? Once that was solved, my flips have been 100% for years.

Paul

--
Paul Goelz
Rochester Hills, MI USA
pgoelz@...
www.pgoelz.com
 

So.... Pier side - What is it?
Pier-side, at least its ASCOM definition, is based solely on the mechanical position of the Declination axis. When the scope passes through the celestial pole, the mount's pier-side changes. See here:



-Ray

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