Siemens SINUMERIK 840D sl Function Manual page 618

Measurement (M5)
Hardware requirements
Bidirectional probe
This probe type is handled in the same way as a mono probe in milling and machining
centers. Bi-directional probes can be used to take workpiece measurements on turning
machines.
Monodirectional probe
This probe type can be used, with only a few restrictions, to take workpiece measurements
on milling and machining centers.
Spindle position with mono probe
To be able to use this probe type on milling and machining centers, it must be possible to
position the spindle with the NC function SPOS and to transfer the switching signal from the
probe over 360° to the receiver station (on the machine stator).
The probe must be mechanically aligned in the spindle to permit measurements in the
following directions at the 0 degree position of the spindle.
Table 8- 2
X-Y plane G17
Z-X plane G18
Y-Z plane G19
The measurement takes longer with a mono probe because the spindle needs to be
positioned several times with SPOS during the measuring cycle.
618
Spindle positions for alignment of probe
Spindle position measurements at 0 degrees
Positive X direction
Positive Z direction
Positive Y direction
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions