Siemens SINUMERIK 840Di sl Programming Manual page 80

Positional Data
3.2 Absolute/relative dimensions
Example of turning
The traverse paths are entered in absolute coordinates with reference to the workpiece zero.
For entering the circle center point coordinates I and J see circle interpolation G2/G3.
N5 T1 D1 S2000 M3
N10 G0 G90 X11 Z1
N20 G1 Z-15 F0.2
N30 G3 X11 Z-27 I=AC(-5) K=AC(-21)
N40 G1 Z-40
Description
The dimensions refer to the origin of the active coordinate system. You program the point to
which the tool is to travel, e.g., in the workpiece coordinate system.
Non-modal absolute dimensioning AC
When incremental dimension G91 is active, AC can be used to allow entry of absolute
dimensions for individual axes on a block-by-block basis.
Milling:
80
;Tool, spindle on clockwise
;Absolute dimensioning, rapid traverse
;to position XYZ
;Tool infeed at feedrate
;Circle center point in absolute dimensions
;Retracting
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals