Strange problem with Wave 150i Guiding

[Derek Fage]

Hi there,

I was doing some testing with my new Wave 150i last night on M16 and when I reviewed this morning something strange happened at about 01:11.

It was quite windy and gusty so I was sticking to shorter 60s exposures to keep stars as round as possible and it was more of an engineering test than serious effort to get really good imaging data but I’d like to understand what might have happened.

Using Blink to look at images all looked ok up to 1:10 with round stars and M16 stationary in the frame.  At 1:11 stars became long trails and this continues in each image with M16 progressively drifting across the frame at a consistent rate and guiding looking like it’s struggling to sort things.

The mount was set to park at the end of the sequence so I can’t see whether it moved significantly by the end of the sequence (but the images certainly seem to point to the mount moving).  Cabling all looked OK before I left and when I went back in the morning and did the FlatWizard with NINA

I’ve uploaded logs to https://openphdguiding.org/logs/dl/PHD2_logs_g5pY.zip and was hoping somebody may be able to see something here to help or point me in another direction.

Thanks

Derek...

[Bruce Waddington]

Your mount never did a meridian flip.  The last guiding session started out at 23:43 pointing 28 minutes east of the central meridian from side-of-pier west.  So you would have reached the central meridian at 00:11 at which point your session manager app should have stopped guiding and flipped the mount. None of that happened.  Instead, the mount either stopped tracking near the central meridian or was unable to continue tracking in a counter-weights-up (upside-down) orientation.

If you're new to automated imaging, you should probably acquaint yourself with the various logs produced by the imaging apps.  Problems like these, often caused by scripting and configuration errors you make, are common.  For PHD2, the best tool to use is the LogViewer: 

https://openphdguiding.org/phd2-log-viewer/

Regards,

Bruce

[Derek Fage]

Ah!

I had checked logs to see if it had been caused by a Meridian Flip but didn’t see one (I hadn’t thought of a meridian flip not happening when it should have)

Unfortunately now I think about it I had a full advanced sequence with meridian flip etc in it, but due to some other issues got rid of this and just setup a bunch of smart images without all of the required triggers…

Many thanks

Derek...

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