Results 1 to 6 of 6

Threaded View

  1. #1

    Default Focus position versus temperature...and also side of pier?

    See attached jpeg.

    This is the analysis of focuser position/temperature from last night's log for the AAVSO Bright Star Monitor (BSM)...CGEM mount, 60mm Tak, MoonLite focuser.

    Data was collected automatically using AcquireStar in FocusMax, with ACP Scheduler doing a focus run every hour for the entire night as it slewed everywhere...covering probably 150 targets..

    I did not do a rigorous check to see what side of the meridian each focus run was performed...but the pattern seems to be that one side of the meridian gives a focus position different from the other side of the meridian...so based on that assumption is how I parsed the data set to east/west sides of the sky. (I know the first focus runs, at warmest temperature, were performed east of the meridian.)

    ...this may be an interesting trend that many GEM users discover about their rigs if they take enough data. But we can't answer that unless we get more data from more scopes and different types of mounts.

    Anyway, I think I have a decent value for focus/temperature slope for this rig. (But does FocusMax allow me to enter a non-integer value into the temp/focus slope data entry box?)

    Progress is made, but with some bumps along the way....

    PS. Yet another reason to hate German mounts. I need to weld more forks. But yes, I also need to find and eliminate the flop/flexure/shift that the German mount exacerbates.
    Attached Images Attached Images
    --
    -------------------------------------------
    Tom Krajci
    Cloudcroft, New Mexico
    http://picasaweb.google.com/tom.krajci

    Center for Backyard Astrophysics (CBA)
    http://cbastro.org/ CBA New Mexico

    American Association of Variable Star
    Observers (AAVSO): KTC http://www.aavso.org/
    -------------------------------------------

 

 

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Pier side detection error
    By Mike Shade in forum Hardware/Software/Driver Topics Not Directly Related to Our Software
    Replies: 8
    Last Post: Jan 4, 2011, 18:39
  2. Astrooptik Pier Side Problem [solved]
    By Kurt-Peter Zirn in forum Hardware/Software/Driver Topics Not Directly Related to Our Software
    Replies: 29
    Last Post: Nov 4, 2010, 14:34

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •