Re: [APML] Collimation of Vixen/Orion R200SS question

[2bfrank@charter.net]

Check to see that the secondary mirror is in the proper location to the
focuser.Use a site tube, or use a hologram laser. If the secondary is not
properly aligned, you will never have it fully collimated.

----- Original Message -----
From: Herm <hermperez@worldnet.att.net>
To: <astro-photo@seds.org>
Sent: Friday, August 17, 2001 7:42 AM
Subject: Re: [APML] Collimation of Vixen/Orion R200SS question


> the first step is to adjust the secondary 3 screws until the laser spot is
> hitting the center of the main mirror. These 3 screws work against each
other,
> if you tighten one you must loose another one.. make sure you end up with
all
> three screws tight... from now on this will be your main collimation
adjustment.
> The main mirror very seldom will need to be adjusted.
>
> Now the main mirror, we want to adjust it until the laser bounces back
into
> itself.
>
> the recessed screws are the collimation grubs... when the scope is
pointing up
> they push "up" on the mirror cell. The other 3 screws are the locking
screws,
> they lock the mirror cell down against the collimation grubs so nothing
moves,
> you tighten these when you are done (carefully or it will throw off the
> collimation). Use 2.5mm allen driver for the collimation grubs.
>
> Point the scope up so that gravity forces the mirror cell to rest down
against
> the grubs, loosen and release the three locking screws. Now carefully
(very
> minimal adjustments) turn the grubs so that the laser bounces back into
itself.
> When you are done lock the cell down again, but be careful it does not
throw the
> collimation off again.
>
> Since the scope must be pointing up for the main mirror adjustment its
best done
> when the scope is mounted. Do this during the day, do not attempt to do it
at
> night.
>
> Herm
>
>
> "Robert Gorichanaz" <rmgorichanaz@wi.rr.com>  wrote:
>
> >Guys -
> >
> >This is an email I sent to Herm Perez yesterday.  I'd appreciate the
> >assistance of anyone else on the list who happens to have this scope (or
> >similar).
> >
> >The laser spot is about 3/4 inch off the sweet spot on the collimator, so
> >it's not off by much.
>
>
> --  APML Archives at <http://astro.umsystem.edu/apml/>  ---
>              Unsubscribe at <majordomo@seds.org>


--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>