I am having problems like Chris P in this forum and Jason Boyce in the CCDAP4 forum. I initialized with the Pyxis at 15 degrees. I tried just guiding after initialization and the guide star bounced all over the box. It also seemed to go in a spiral in subsequent runs. I did another calibration and initialization close to 0 dec and the guiding settled down to .2 to 1 errors in x,y. I tried a run and the guide star drifted out the upper right hand corner of the box. CCDAP did a plate solve between light frames and reaquired the guide star, but the same guide problem occured. I tried the run again and it started drifting out the lower right corner of the box. I have attached logs.

ccdap20081021_010452.log (12 KB, 86 downloads) Kirk Carbo log

Hi Kirk,

How are you guiding? If you are using an off-axis guider, select SelfGuidedR for the guider.

Hello John,

I am using an off axis guider with the pick off mirror at the top of the imaging chip. I initialized with SelfGuided selected on the settings page. I changed it to SelfGuidedR and the guide star still went off of the box. Do I need to recalibrate the autoguider and initialize CCDAP again when I change from SelfGuide to SelfGuideR?

Kirk,

The help file is incorrect in that it doesn't matter whether the guider is at the top or the bottom of the imaging chip. What matters is the additional mirror in the path to the guider. I have clarified the online help in this area.

You should set SelfGuidedR and then initialize.

I am using an off axis guider with the pick off mirror at the top of the imaging chip. I initialized with SelfGuided selected on the settings page. I changed it to SelfGuidedR and the guide star still went off of the box. Do I need to recalibrate the autoguider and initialize CCDAP again when I change from SelfGuide to SelfGuideR?

Oops, double posted. Thanks John, I will try again tonight.