Hi all,

Some doubts about the underlying logic of meridian flip process.
I thought that it was based on the 'side of pier' that mount driver reports (actually, talking about eqmod with a eq6r pro). But I noticed that, afaik, side of pier really reports where the scope is pointing taking only into account the declination value. That is, if mount declination is between North-East, the driver reports 'west (scope pointing to East)', and if dec is between North-West, the driver reports 'east (scope pointing to West)'. Is this right? If so, if I'm initially pointing some object to the East very near of the meridian, the object will traverse the meridian with the (obviously) same dec value; so 'side of pier' would not change. However, the meridian flip does occur. So, the meridian flip is not based on 'side of pier' information, or I'm wrong in some assumptions.
Supposing that meridian flip is not based on side of pier info, I can fully understand that the mount (well, the indi driver) does know where the meridian is, and where is pointing actually; so no problem. But my question goes beyond this and would like to understand how does it work under the hood. So, to perform the meridian flip, does eqmod driver simply issue a goto command and the mount by itself "knows" that has to perform a meridian flip? I guess my question is more focused on how skywatcher protocol works, cause I guess the handset performs the same operations than indi driver. Well, actually don't know smile.png

Thanks!

Miguel

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