Siemens SINUMERIK 840DE Programming Manual page 137

=AC(...)
=IC(...)
Note
CIP is modal.
Input in absolute and incremental dimensions
The G90/G91 defaults for absolute or incremental dimensions are valid for the intermediate
and circle end points.
With G91, the circle starting point is used as the reference for the intermediate point and end
point.
Example of milling
In order to machine an inclined circular groove, a circle is described by specifying the
intermediate point with 3 interpolation parameters, and the end point with 3 coordinates.
N10 G0 G90 X130 Y60 S800 M3
N20 G17 G1 Z-2 F100
N30 CIP X80 Y120 Z-10
I1= IC(-85.35)J1=IC(-35.35) K1=-6
N40 M30
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
4.10 Circular interpolation with intermediate and end points (CIP)
K: Coordinate of the circle center point in the
direction
Absolute dimensions (non-modal)
Incremental dimensions (non-modal)
;Approach starting point
;Tool infeed
;Circle end point and intermediate point:
;Coordinates for all three geometry axes
;End of program
Programming Motion Commands
Z
4-31