ST-i horizontal banding problem.

Discussion in 'STF Series CCD Cameras' started by Remie J. Smith, Feb 16, 2015.

  1. Remie J. Smith

    Remie J. Smith Standard User

    Joined:
    Feb 13, 2015
    Messages:
    6
    I have am intermittent problem with my ST-i guide camera. On some nights the guide stars show up as a horizontal band. The banding starts on the left left side at the row position of the star and stretches to the right. I can reset the camera use different imaging software, reset the computer and the problem remains. The next night I go out and the problem is completely gone. I can't be the only one with this problem so I'm posting this thread to find help

    Thanks
    Remie
     
    Remie J. Smith, Feb 16, 2015
    #1
  2. Doug

    Doug Staff Member

    Joined:
    Sep 25, 2014
    Messages:
    9,965
    I'm thinking maybe the shutter isn't working reliably, and it's possible that this depends on the orientation of the camera. The next time this happens try rotating the camera in the focuser, to see if gravity affects the results. That might explain why some nights it works and some nights it doesn't. If you do find the orientation matters, pop the camera off and look at the shutter operating as you rotate the camera around.

    If this is in fact the case, then I'm afraid the camera needs to go in for repairs.
     
    Doug, Feb 16, 2015
    #2
  3. Remie J. Smith

    Remie J. Smith Standard User

    Joined:
    Feb 13, 2015
    Messages:
    6
    Doug

    Thanks for the reply. I have rotated the camera with no effect. I have also looked into the camera to imake sure the shutter isn't misbehaving.

    Could it be a power issue with the usb not providing enough current?

    Remie
     
    Remie J. Smith, Feb 16, 2015
    #3
  4. Doug

    Doug Staff Member

    Joined:
    Sep 25, 2014
    Messages:
    9,965
    Perhaps. Try a different hub, or better yet avoid using one altogether.
     
    Doug, Feb 16, 2015
    #4
  5. Jan Soldan

    Jan Soldan Cyanogen Customer

    Joined:
    Oct 11, 2014
    Messages:
    239
    Location:
    Czech Republic
    Jan Soldan, Feb 17, 2015
    #5
  6. Remie J. Smith

    Remie J. Smith Standard User

    Joined:
    Feb 13, 2015
    Messages:
    6
    Jan;

    When I click the link above I get: "You do not have permission to view this page or perform this action."
     
    Remie J. Smith, Feb 17, 2015
    #6
  7. Jan Soldan

    Jan Soldan Cyanogen Customer

    Joined:
    Oct 11, 2014
    Messages:
    239
    Location:
    Czech Republic
    so, go to the forum's homepage and its below.
    jan
     
    Jan Soldan, Feb 18, 2015
    #7
  8. Remie J. Smith

    Remie J. Smith Standard User

    Joined:
    Feb 13, 2015
    Messages:
    6
    Jan;

    I have been all over the forum trying to get to the thread you suggested. I don't think its available to a "Standard User".

    Also I have attached an image of my issue.
     

    Attached Files:

    Remie J. Smith, Feb 18, 2015
    #8
  9. Tim

    Tim Staff Member

    Joined:
    Sep 25, 2014
    Messages:
    1,842
    You should be able to access the FAQ....I have corrected the permissions so standard users can access it.
     
    Tim, Feb 18, 2015
    #9
  10. Jan Soldan

    Jan Soldan Cyanogen Customer

    Joined:
    Oct 11, 2014
    Messages:
    239
    Location:
    Czech Republic
    Jan Soldan, Feb 18, 2015
    #10
  11. Remie J. Smith

    Remie J. Smith Standard User

    Joined:
    Feb 13, 2015
    Messages:
    6
    Ok, we are getting close. I can now get to the thread for advanced configuration page. I still get and error when I try to open the screen shots as shown below:

    Diffraction Limited - SBIG / Cyanogen Forum - Error
    You do not have permission to view this page or perform this action.
     
    Remie J. Smith, Feb 18, 2015
    #11
  12. Remie J. Smith

    Remie J. Smith Standard User

    Joined:
    Feb 13, 2015
    Messages:
    6
    Thank you, it now works.

    Is there documentation on the range of ST-I gain values for the advanced configuration screens?
     
    Remie J. Smith, Feb 19, 2015
    #12
  13. Bill

    Bill SBIG Service and Repairs Staff Member

    Joined:
    Oct 12, 2014
    Messages:
    527
    I believe a nominal gain is .52
     
    Bill, Feb 19, 2015
    #13

Share This Page