Siemens SINUMERIK 840D sl Programming Manual page 113

Approaching the workpiece
Position the probe roughly at measuring depth in the center of the pocket/hole, or in the case
of spigots roughly in the center above the spigot.
Measuring cycles
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring in JOG
4.2 Workpiece measurement
4-25