Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 802)

Chapter 30
Using a 9/Series Dual--processing System
30-34
An axis that is decoupled from its dual group can have an integrand letter
assigned to it in AMP by the system installer. This integrand is used with
that axes originally assigned AMP axis name to perform functions such as
circular interpolation. Plane dependant operations (such as circular
interpolation or cutter compensation) are available to a dual axes while
coupled (provided the dual axis is defined in the active plane). Once
decoupled these plane dependant functions are available to the members of
a dual group as independent axes (provide that the axis is used in the active
plane). Planes can contain dual axes from within the same dual group
however these planes are only available when the dual axis group is
decoupled and in the process that is currently activating the plane.
Dual Drilling Axis
If the slave of a dual axis is AMPed as the fixed drilling axis, the entire
dual group operates as a drilling axis when coupled. Once decoupled
however the drilling axis traits are independent for each axis. The system
installer determines which axes are drilling axes in AMP. For example
your control has a dual axis made up of X1, X2, and X3. The system
installer has AMPed X2 to be the fixed drilling axis. When coupled the X
axis is programmed as a drilling axis. When decoupled only the X2 axis is
programmed as the drilling axis (note X2 when decoupled uses its AMP
defined axis name, not X2).
END OF CHAPTER