Yes, you are right of course that the Temma driver has the 'flip' command. I forgot about that.
No, not a simple flip command, but rather a non-meridian flipping slew.
A normal slew across the meridian will flip a GEM to keep the scope on top. Need a slew where the flip point is the act of crossing any arbitrary local hour angle.
Suppose the flip point is two hours prior to the meridian, the GEM is slewed one hour prior, the scope ends up upside down. Now a small slew is done to target a nearby bright star for focusing purposes, the scope remains upside down (if less than two hours prior). Then a small slew back to the target. The scope remains upside down.
The maximum meridian flipping offset is limited to avoid any chance of crashing. On my setup within two hours is OK.
And to avoid backlash problems, all of these slews need to approach the target from the specified declination direction. This in general may require declination overshoot and backtrack by an amount larger than worst case backlash.
Thanks,
Mike
