[AZ-Observing] Re: Troubles on the Pole [Was: Re: Re: Tonight (Friday)
- From: "Jimmy Ray" <jimmy_ray@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Sun, 25 Feb 2007 12:02:15 -0700
"There is software that will "model" the errors
and compensate for them. TPoint from Cyanogen is such a package."
Would this be what "PEC" or "Cone" correction does on the Celestron CGE's?
Jimmy Ray
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx]On Behalf Of gene lucas
Sent: Sunday, February 25, 2007 11:52 AM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: Troubles on the Pole [Was: Re: Re: Tonight
(Friday)
On the smaller Meade fork mounts, there are set screws provided in the
ends of the short "arms" that attach the tube, for small adjustment.
There is a procedure of sorts described on the web to square on the tube
assembly, which involves pointing the tube at a target on a wall, placed
far enough away to allow checking the alignment.
I don't know about the 14 and 16 inch telescopes.
I believe that GEM mounts could also possibly be shimmed on the
declination assembly, but it depends upon the construction. Most are
manufactured with the assumption that the machining takes care of that.
But nothing is perfect. There is software that will "model" the errors
and compensate for them. TPoint from Cyanogen is such a package.
Gene Lucas
(17250)
Stan Gorodenski wrote:
>Thanks for the tip on the Meade described method. I did not know this.
>What might also drive someone crazy who may not be aware of it and is
>striving for _perfect_ alignment is the fact that the two axis of
>rotation are obviously not perfectly orthogonal. If off too far, it
>might require putting some shims where the fork attaches to the RA
>drive, assuming the individual has a fork type mount so they can do it.
>Out of luck if the person has a German Equatorial to be able to make
>this kind of correction.
>Stan
>
>gene lucas wrote:
>
>
>
>>The two-star "go-to" computer-aided alignment routine, as explained in
>>the Meade manual for equatorial alignment, does NOT work properly (as
>>stated). When re-centering on Polaris, going back and forth from
>>Polaris to an equatorial star, you MUST re-center to only 1/2 the
>>(error) distance. Otherwise, the adjustment/solution will NOT
>>"converge". This will drive you craaaaaazzzzzy. (The Meade folks know
>>about all this.....)
>>
>>
>>
>>
>--
>See message header for info on list archives or unsubscribing, and please
>send personal replies to the author, not the list.
>
>
>
>
--
See message header for info on list archives or unsubscribing, and please
send personal replies to the author, not the list.
--
See message header for info on list archives or unsubscribing, and please
send personal replies to the author, not the list.
Other related posts:
