|
You can get that message with any camera.
Uusually it means that the framing box is too small and the star moved out of the framing box or the software is picking up a hot pixel in the image and confusing it for the guide star.
Make sure your camera is at high cooling.
You can use the main imaging sensor instead of the autoguider and CCDsoft will automatically adjust for that. I have done that successfully with an STL11.
Just use the focus subrame checkbox and drag a box around a bright guide star (don't use a double star, don't use a star which has another brighter star nearby that will come into the frame when the mount moves).
What callibration exposure times are you using?
As I recall you want the image to move 50 pixels which isn't very much so depending on your focal length that may only be 10 second callibration times. If you have an FSQ it may be 30 seconds.
I also once used a plug in to remove hot pixels for CCDsoft when it was hot pixels causing the callibration to fail. Google it, its a free plug in.
It worked but for some reason it disabled the auto select button on the autoguiding tab which is handy to use as it centres the guide star.
Greg.
|