Thank you very much, Ed~!
You means I should set more degrees (such as 4 degrees) in iOptron mount, to give SGPro more time to execute meridian flips?
In addition, there may be other two reasons:
1, Ken’s reply
(Recovery and meridian flips - #9 by Ken - Feature Requests - Main Sequence Software)
– It’s hard to tell why, but the call to stop and restart your guider failed. I think it is a timing issue related to using the onboard SBIG guide chip through PHD2. I have made the fragile parts of this method a bit more robust by adding retry attempts when this situation is encountered.
This explains my SGPro and PHD collaboration often have a problem–PHD frequent timeout problems.
2, I learned from iOptron developer, the current firmware exists control command bug near the meridian, and they will be fixing this problem.
I suspect this problem may be caused by a combination of factors.