Guiding Problem

[Harald]

Hi my Equipment 

Mount SkyWatcher EQ-8 R Pro

PHD with my SkyWatcher Newton 305 /1200 

Guiding Camera : Bresser GPCMOS02000KPA

Off Axis Axis guider.

Problem ist, that after selection a Starr for guiding my mount will be moved by PHD that the locked Star will move over the PHD PC screen and tha get lost.

I assume that a parameter is not well set.

Anny idea.

Harald

[Bruce Waddington]

Sorry, this is a red-hot mess.  You need to start over and for you, the first step should be to update to the 2.6.11dev6 release so you can use the new Calibration Assistant (Tools/Calibration Assistant).

https://openphdguiding.org/development-snapshots/

Then you should abandon ST-4 guiding because there is a perfectly workable ASCOM driver for your mount.  Install ASCOM and start using the ASCOM driver for your mount (probably EQMOD).  Be sure you follow the procedure below to get the EQMOD settings right. 

https://github.com/OpenPHDGuiding/phd2/wiki/EQASCOM-Settings

Ditch the ST-4 guide cable, you don't need it.  ASCOM mount connections are described at length in the User Guide. Once you've gotten all that installed and connected, you need to get an assessment of how your mount is performing - you do that by following the steps in the baseline procedure link below.

https://www.dropbox.com/s/zrf0au7jaisvt85/How%20to%20create%20a%20baseline%20for%20guiding%20results%20using%20OpenPHD2.pdf?dl=0

The first step in the baseline procedure is to calibrate and you should use the Calibration Assistant to do that.  Stick with it until you get an acceptable calibration, trying to forge ahead with a bad calibration is a waste of time. Then get systematic measurements of how your mount behaves without and then with guiding, staying in the same area of the sky where you calibrated.  Do NOT fiddle around with the guiding parameters, simply apply whatever recommendations are shown by the Guiding Assistant.  Stop trying to use 500ms exposures, use 2-sec exposures until you can get things sorted out.  While you are learning, you should do a fresh calibration at the start of each night's session.  Once that is done, you don't need to do another one for the rest of the night.  If you follow all these procedures and collect some representative performance data, we can take another look at the logs and help you get to the next step.

You should also be sure you are familiar with the Best Practices guide and, for that matter, at least the Basic Use section of the User Guide:

https://openphdguiding.org/man-dev/Basic_use.htm

https://openphdguiding.org/phd2-best-practices/

Good luck,

Bruce

[Harald Beger]

Thanks Bruce

this evening I performed a 3 star pol allignment set the phd to south. After that i startet guiding. It worked [good but not perfect] than the dec messed up again after prox 40 sec .

At weekend I ll try to do as you described.

Vielen Dank

Thanks

Harald

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