Erroneous meridian flip with 10Micron mount


#1

If I slew to a target well past the meridian (like 3 hours past) SGP checks before starting to capture images with the mount and thinks it needs to do a flip (which it doesn’t). Naturally the flip then fails. It seems to be a side-of-pier issue?

SGP meridian flip settings are:
Minutes past meridian flip -5
Wait for meridian
Auto center after meridian

The 10Micron settings are:
Flip slew tol 03 degrees
Flip guide tol 05 degrees
Meridian side: BOTH


#2

If you want to be able to slew to a target 3 hours past meridian then shouldn’t that “Minutes past meridian” setting be set to something like 180 or 240 and not 5? (i.e. X hours past meridian * 60)

BTW: I’ve no idea what the correct 10Micron settings should be or whether it is advisable to go 3+ hours past the meridian with your set-up…


#3

My understanding that -5 minutes past the meridian is the setting for when the meridian flip should occur, i.e. the flip occurs 5 minutes before reaching the meridian. It has no bearing on when a slew can occur.


#4

Peter,

this is exactly right.

For that to work, the ASCOM driver for your mount must be able to set the SideOfPier property. This is an optional function; some drivers implement it, others do not.

This part of your post, I do not understand. Why do you think SGP thinks it needs to do a flip?

Kind regards,
Horia


#5

Hi Horia, it thinks it needs to do a flip because it attempts to do one!


#6

I’ve just done a test with an older version of the 10Micron driver and the problem seems to be fixed.


#7

Hi Peter,

There is no entry in the log file you uploaded showing the “urge” to do a meridian flip. Actually, in the setup of the sequence there is a line saying:

Was that the wrong log file?

Kind regards,
Horia


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