Siemens SINUMERIK 840Di sl Programming Manual page 79

Parameters
G90
X Y Z
AC
Note
The command G90 is modal.
Generally G90 applies to all axes programmed in subsequent NC blocks.
Example of milling
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.
N10 G90 G0 X45 Y60 Z2 T1 S2000 M3
N20 G1 Z-5 F500
N30 G2 X20 Y35 I=AC(45) J=AC(35)
N40 G0 Z2
N50 M30
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
3.2 Absolute/relative dimensions
Absolute reference dimension
Axis identifiers of the axes to be traversed
Absolute dimensions non-modally effective
;Absolute dimensioning, rapid traverse to
;XYZ, tool, spindle on
;clockwise
;Tool infeed at feedrate
;Circle center point in absolute dimensions
;Retracting
;End of block
Positional Data
79