The relative home sensor position is computed using both the mount’s
fixed homing sensor location and the equatorial coordinates supplied to
TheSky Professional when the mount was synchronized on a star.
For a perfect mount that has no optical or mechanical misalignments,
mechanical flexures or polar alignment errors, the relative home position
would identically match the absolute mechanical home position. This is
never the case. Misalignments in the mount’s mechanical axis and the
telescope’s optical axis, for example, always introduce telescope pointing
errors so there will always be a difference between the relative and
absolute home position after synchronization.
When the mount is synchronized to a known star, the “relative location of
the home position” changes based on the pointing error introduced by
the mechanical and optical misalignments.
When the relative and absolute home sensor positions are equal, it
means the mount has not yet been synchronized on a star.
After synchronizing the mount, choose the Get All Bisque TCS
Parameters command from the Commands pop-up menu on the
Parameters tab (see page 120) to retrieve the control system’s current
settings. Retrieving all the settings takes several seconds, so their values
are not updated in “real time”.
Initial direction to slew when searching for the home position
“interruptor” (that is, the physical component on the gear that blocks the
optical path of the homing sensor to signal the homing position).
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