[sac-forum] Re: Digital setting circle question

AJ, I appreciate the fact that you're keeping me in mind.
 
Dan Gruber
 
-----Original Message-----
From: sac-forum-bounce@xxxxxxxxxxxxx
[mailto:sac-forum-bounce@xxxxxxxxxxxxx] On Behalf Of AJ Crayon
Sent: Saturday, March 29, 2008 8:44 AM
To: sac-forum@xxxxxxxxxxxxx
Subject: [sac-forum] Re: Digital setting circle question
 
Talk about cockpit errors just who is the Dan in my message?  Should
have been Steve.  Don't know how that was phat phingered.

AJ Crayon
Phoenix, AZ
----- Original Message ----- 
From: AJ Crayon <mailto:acrayon@xxxxxxx>  
To: sac-forum@xxxxxxxxxxxxx 
Sent: Friday, March 28, 2008 9:30 PM
Subject: [sac-forum] Re: Digital setting circle question
 
Dan, sorry for not getting to your initial query quickly, wife and I
went out to lunch; but the responses were quite good and accurate.
 
Re - resetting the platform.  Once the platform is reset and the Reset
button on the SC is pressed the scope is not pointing where it was
before the reset - an obvious comment.  In regards to going back to the
last object - that is not necessary at all.  Basically, when I do a
reset, I push-to an object bright enough to see in the 9X50 finder, do a
realign, then the reset as described and, finally as a check against
cockpit errors, go back to the object.  In the past, that is last year
and beyond, it was accurate enough, with another reset, a good 80%.
Sooo, basically, your statement is on target.  It takes just a few
seconds to verify the alignment is correct, otherwise it may take a
while to realize such.
 
Hope this helps and keep the questions coming.

AJ Crayon
Phoenix, AZ
----- Original Message ----- 
From: Steve D. <mailto:fester00@xxxxxxxxxxx>  
To: sac-forum@xxxxxxxxxxxxx 
Sent: Friday, March 28, 2008 7:26 PM
Subject: [sac-forum] Re: Digital setting circle question
 
Hi everyone,
   Back from the oral surgeon.  Everything went ok, but they couldn't
keep me numb, for some reason.
  Anyway, thanks for all the responses.  Most helpful.  I'm not planning
anything specific, (Tom, AJ, just wondering how the software deals with
the changing aspects of sky tracking, and if it's mount dependant or
not.
  Peter pretty much answered my initial question, but as these things
go, one question answered generates 5 others.  (Thanks for the answer,
Peter.  I may just use the link to do some more research in the future.)
Paul came closest to answering all my subsequent questions, saying the
S/W converts all coordinates to polar coordinates, as long as it knows
how the mount behaves.  Thanks Paul.
  AJ was whom I expected to hear from most authoritatively, as I knew he
had one, and his answer is great.  The link to the SC commander manual
will come in handy, and I really liked the "cockpit errors" comment.
:-)  I have as many of those as I can handle, thank you very much.  To
answer your question, I don't have one as yet.  My question is more
based on the mechanics of the DSC.  Actually, the software side of it,
based on given mechanical systems.  Having been in electronics for 30
some years before, these type things still pique my curiosity from time
to time.  Can't help it.
Rick's second answer was great, as it gave some insight into the
software, (which was my goal), but raises another question.  That
question being, and this could go to AJ as well, when you reset the
platform, is it required of you to reacquire the same target you were on
before the reset?  This would make sense to me, as it would give the S/W
a benchmark from which to work.  It could then recalculate to go from
there.

  Tom: Confound you!  Let me get the chair working, first!  THEN we can
think about automating it.  (But it quickly strikes me, that the Meade
LX200 S/W operates an Alt/Az mount.  Hhhhmmmmm...)

Thanks again, everyone.

Steve Dodder
President, Saguaro Astronomy Club
Director, Stone Haven Observatory 
fester00@xxxxxxxxxxx 
http://www.stargazing.net/Astroman

  _____  

From: fester00@xxxxxxxxxxx
To: sac-forum@xxxxxxxxxxxxx
Subject: [sac-forum] Digital setting circle question
Date: Fri, 28 Mar 2008 10:51:46 -0700

Howdy,
   Here's a question, maybe technical, about DSC's such as Sky
Commander.  If I remember right, they mount on an alt/az Dob and
calculate the position of objects in Altitude and Azimuth.  What happens
when you put the alt/az mount on a platform?  Is the calculation still
purely alt/az, or is the DSC informed somehow and adjusts the algorithm?
If I'm totally wet, let me know.

Thanks.

Steve Dodder
President, Saguaro Astronomy Club
Director, Stone Haven Observatory 
fester00@xxxxxxxxxxx 
http://www.stargazing.net/Astroman

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