Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 93)

Axis Parameters
Chapter 4
4-9
Range
Selection Result
(a) I
(b) J
(c) K
(d) None
Notes
Each of these parameters must be set independently for its corresponding
axis.
The axis integrand name is a secondary programming word used to
program additional axis data when necessary. For example, the axis
integrand name can be used to specify:
arc center position
thread lead
Typically, axis integrand names are:
X axis: I
Y axis: J
Z axis: K
Assign integrand names for a dual axis on a dual processing control only
for the master axis and other axes you intend to decouple from the dual
group. When a dual group is decoupled, each slave can use integrand
planer functions (such as circular interpolation) only after the dual group is
decoupled and the slave axis name has been AMPed as a primary or
parallel axis name in the active plane definition. The master axis in the
dual group uses the dual groups integrand letter when decoupled.
Important: Axis integrand for parallel axes must be defined with the same
integrand word if they are to be used interchangeably for planer functions
(such as G02 or G03). For example if X and U are parallel and both are
used to define the G17 plane along with some other perpendicular axis,
both parallel axes must be defined here with the same integrand word.
Parallel axes that are not used in planer functions do not need to use the
same integrand.
Important: Non--Planar axes that are defined with the same integrand
letter as an axis used in one of the planes must be configured in AMP after
the planar axis. For example if G17 is defined as the XY plane and the X
integrand is I, an axis, $X for example, that uses the I integrand letter and
is not a planar axis must be configured in AMP as an axis following the X
axis.