Siemens SINUMERIK 808D Programming And Operating Manual page 44

Checkpoints and programs
When using the checkpoints 1 to 8 the imaginary length of the tool tip is to be used as reference while writing the program.
The program should be written only after defining the coordinate systems.
Program and tool movements for the checkpoints 1 to 8:
When using the checkpoints 0 to 9 the cutting edge center point R is to be used as reference while writing the program. The
program should be written only after defining the coordinate systems. If no tool nose radius compensation is used, the
programmed shape may not differ from the processed one.
Program and tool movements for the checkpoints 0 to 9:
Selection/deselection of the tool nose radius compensation
● Selection of the tool offset
The tool offset is selected through a T command.
● Activating the tool nose radius compensation
The following G functions are used for activating/deactivating the tool nose radius compensation:
G function
G40
44
Function
Deselect the tool radius compensation
Programming and Operating Manual (ISO Turning/Milling)
G group
07
01/2017