I am controlling AP1100 with absolute encoders from C++ code by sending commands to virtual COM port.
Everything seems to work, but one thing.
I try to park the mount in position 3 (parallel to polar axis, counterweight down).
Issuing commands Sz ..# Sa ..#:MS# with values for Az and Alt that APCC shows in this parked position results in correct DEC --- close to 89:59:... but after the mount goes to correct position, it waits a bit and then starts changing RA so that the final position after has the counterweight at about 45 degrees to vertical.
In all positions fat from polar, slewing using Sz , Sa or Sd .. Sr seems to work just fine.
What is the trick to parking in position 3? Is there there some magic sequence of commands to move mount to that postion ?