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en:ost:telescope:probleme [2021/12/07 16:54] – [CCDops does not find the filter wheel] rhainich | en:ost:telescope:probleme [2022/07/25 10:57] (current) – [Telescope:] rhainich |
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===== Telescope: ===== | ===== Telescope: ===== |
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| ==== Focuser of the CDK20 does not run the complete range of ~35000μ ==== |
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| <WRAP group> |
| <WRAP twothirds column> |
| **Problem description:** |
| PWI3 shows clearly negative position values when driving in or the focuser does not run in the positive range (when driving out) up to the maximum ~35000μ. |
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| **Solution:** |
| The focuser has "swallowed" and the encoder delivers wrong values. This can be fixed by clicking on ''Home'' (see picture) in the Focuser tab of PWI3 under ''Find Home and Reset'' and then on ''YES''. This will reset the focuser and reinitialize the home position, restoring the normal focus range. |
| </WRAP> |
| <WRAP third column> |
| {{ ost:software:pwi3_homing_focuser.png }} |
| </WRAP> |
| </WRAP> |
==== Wobbling Camera/spectrograph ==== | ==== Wobbling Camera/spectrograph ==== |
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**Solution:** | **Solution:** |
The cameras' interior is not in a vacuum and moisture can get in, causing icing on the cooled CCD chip. To prevent this, the cameras have dry cartouches with desiccants. If icing appears, the cartouches need to be regenerated ([[en:ost:telescope:setup#ccd_cameras|see this article]]). During that observational night, wait for approximately one hour until the ice sublimates from the CCD chip. | The cameras' interior is not in a vacuum and moisture can get in, causing icing on the cooled CCD chip. To prevent this, the cameras have dry cartouches with desiccants. If icing appears, the cartouches need to be regenerated ([[en:ost:ccds:grunddaten#maintenance|see this article]]). During that observational night, wait for approximately one hour until the ice sublimates from the CCD chip. |
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==== ST-8: shutter error ==== | ==== ST-8: shutter error ==== |