Siemens SINUMERIK 840D sl Operating Manual page 215

Note
An electronic workpiece probe must be calibrated before use.
Universal
Operating Manual, 01/2015, 6FC5398-6AP40-5BA2
Machine manufacturer
The tool length of the workpiece probe is measured to the center of the ball
(length m) or to the ball circumference (length u).
Please refer to the machine manufacturer's specifications.
Tool management
10.4 Tool dimensioning
215