Siemens SINUMERIK 840Di sl Programming Manual page 20

Fundamental Geometrical Principles
1.1 Description of workpiece points
Example of turning
The positions for points P1 to P4 in incremental dimensions are as follows:
G90 P1 corresponds to X25 Z-7.5 ;(with reference to the zero point)
G91 P2 corresponds to X15 Z-7.5 ;(with reference to P1)
G91 P3 corresponds to Z-10 ;(with reference to P2)
G91 P4 corresponds to X20 Z-10 ;(with reference to P3)
Note
When DIAMOF or DIAM90 is active, the path setpoint is programmed as a radius dimension
with G91.
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Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals