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Re: Usability Question


 

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Thanks!

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From: [email protected] <[email protected]> On Behalf Of Derek C Breit
Sent: Saturday, August 6, 2022 10:49 PM
To: [email protected]
Subject: Re: [Losmandy_users_io] Usability Question

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(I had to calculate my FOV.. It is listed as 0.1 x 0.07 degrees, so 6 arcminutes..)

This may include an extra step or so, as I was always told not to align on the first star.. Anywho, this is what I just did.. Maybe it¡¯ll work for you!

My settings are correct.. I have a new battery, I reset CWD. I did a cold start.. My clock runs very fast, so I use my cellphone and set it to the second and hit the SET button when appropriate.. I do this on every powerup.. I live in Morgan Hill, CA and this was around 8:30 PM.. aka a little while ago..

I did a goto to Arcturus. Laser should it as it normally is, which is HALF a moon diameter away, almost entirely in RA.. (I use the tactile buttons on the back on the hand controller.. Coiled cord points away from me.. The button is what I need to center the target.. Also takes just a touch north in Dec.. I mention this for the ¡°Stops Short¡± idea.. )..

Anywho, I centered Arcturus, and SYNCHED..

GOTO Antares, Center.. SYNCH.. ALIGN..

GOTO Arcturus.. Centered it, as it was off towards the top left, and ALIGNED..

GOTO Vindemiatrix and it is nowhere to be found and I didn¡¯t try! I did a Goto to Arcturus.. On the way, I saw Vindemiatrix flash by.. *Importantly* Arcturus was in the same top left corner it was previously, so I went to MENU / ALIGN / UNDO LAST ALIGNMENT.. This time I centered Arcturus, SYNCH, then ALIGN..

GOTO Vindemiatrix, Center SYNCH, then ALIGN..

Arcturus to Vindemiatrix is around 20 degrees.. Arcturus to Antares is ~ 56 degees.. Antares to Vindemiatrix is ~ 62 degrees.. Not the best choices, but good enough.. Now I have three stars in a model on the West. And regardless of which order I went to them via GOTO, they were all quite close to being centered in my little 6 arcminute FOV.. My guess is they were all within 2 arcminutes of being perfect..

I used a camera and changed the Region of interest.. If you use eyepieces, like I used to do, start out widefield until you locate the target, then increase the power ¨C i.e take the time to be exact as possible before adding them to the model.. and remember, SYNCH, then ALIGN.. The ¡°New¡± thing for me was to try and go back to previous stars to make sure they were correct before adding another one, as if it is wrong in any way, you can ¡°UNDO LAST ALIGNMENT¡±..

I parked it at CWD and will do a WARM RESTART and see how it works next time out.. :-))

Derek

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From: [email protected] [mailto:[email protected]] On Behalf Of Derek C Breit
Sent: Saturday, August 06, 2022 9:54 PM
To: [email protected]
Subject: Re: [Losmandy_users_io] Usability Question

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Put the Counterweight bar horizontal , use the clutch knob as needed, and level with a torpedo level.. Spin the RA dial and set it to something like 18 hours.. Loosen clutch and lower the Counterweight bar and set it at 0 hours.. Lock the clutch.. Loosen the other clutch and adjust the scope until the level on the dovetail is centered.. Tighten clutch.. Your visual, so do this ¡°well¡± but do not obsess with it.. I have a solution for you to try.. Just worked perfectly for me.. First time and I am quite pleased about it!

See next email.. It¡¯ll take a minute..

Derek

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From: [email protected] [mailto:[email protected]] On Behalf Of Mark de Regt
Sent: Saturday, August 06, 2022 8:53 PM
To: [email protected]
Subject: Re: [Losmandy_users_io] Usability Question

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Agreed about ¡°should.¡±? ?

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What is the best method for making sure I have CWD a good as possible?

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From: [email protected] <[email protected]> On Behalf Of Paul Homer
Sent: Saturday, August 6, 2022 8:21 PM
To: [email protected]
Subject: Re: [Losmandy_users_io] Usability Question

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Mark,

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Assuming you are polar aligned it is not just the CWD position that matters but the top of the dovetail should also be levelled, both with a small level.

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This is easy and quick and should get you fairly close.

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Then centre the star and synchronise the first star.

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If you are not so closely polar aligned then take the time to do alignments on three or more stars spread across the sky.

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This sill build a pretty accurate model and no camera is required.

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It will need to be rebuilt if you move the mount, but should only require a synchronisation if you only warm start.

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Paul

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On 7 Aug 2022, at 8:41:23 am, Mark de Regt <deregt@...> wrote:

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OP here again.

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I really appreciate all the suggstions!

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Two things have resonated:

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  1. I only guestimate CWD position with my eye.? If precision of CWD matters, and if there is a simple way to get it perfect, that may be the cause.
  2. People keep taking about using plate-solve to work around the poorly-functioning Gemini2 model building.
    1. I need a camera to do that; I¡¯m happy to buy a cheap camera for that, but not an expensive one; any suggestions?
    2. I own TheSkyX Professional Edition, a very powerful planetarium program.? Would this do that is being suggested, and, if so, how?

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Thanks again!

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Mark

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Virus-free.

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