Siemens SINUMERIK 840D sl Programming Manual page 164

Measuring Cycles for Milling and Machining Centers
5.3 CYCLE976 calibrate workpiece probe
Determining the positional deviation of the workpiece probe
A real workpiece probe can deviate from its ideal vertical position even when not deflected.
This positional deviation (skew) can be determined with measuring variants in this cycle and
then entered in the intended array of the workpiece _WP[i, 7] for abscissa and _WP[i, 8] for
ordinate (for detailed data: refer to Data description chapter "Cycle data").
These values are taken into account in precise probe positioning in subsequent
measurements with a similarly calibrated workpiece probe.
Workpiece probe types that can be used
• Multidirectional probe (_PRNUM=xy)
• Monodirectional, bidirectional probe (_PRNUM=1xy)
Programming
CYCLE976
5-30
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring cycles