Re: Unexpected mount movement


Ray Gralak
 

The only software that I was using that talks to the mount is SGP. I checked its logs, and there's nothing
logged during the exposure at all. Plus SGP's dither is on the order of a few pixels, not a hundred.
There were no commands to move the mount issued during the time interval you specified. Even if a command external to APCC were issued, it would have shown up in changed RA/Dec coordinates. The logical conclusion is that something external caused the move.

Given your equipment, a likely reason would be a clutch slip. The slip could have occurred because the clutch is not tight enough to overcome an imbalanced OTA or a cable tugging on the OTA.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Alex
Sent: Tuesday, October 12, 2021 4:01 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Unexpected mount movement

The only software that I was using that talks to the mount is SGP. I checked its logs, and there's nothing
logged during the exposure at all. Plus SGP's dither is on the order of a few pixels, not a hundred.

Alex

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