Siemens SINUMERIK 840D sl Programming Manual page 176

Measuring Cycles for Milling and Machining Centers
5.6 CYCLE979 workpiece: Measure hole/shaft/groove/rib at an angle
Measuring principle for groove or web
The measuring cycle measures points P1 and P2 inside the groove and outside the web.
The actual value of the groove width and web width and the position of the groove center
and web center in relation to workpiece zero are calculated from the measured values.
Supplementary functions for hole and shaft diameter, groove or web width, and tool compensation.
● An empirical value from data block GUD5 can be included with the correct sign.
● A mean value can be derived from several workpieces, measurement calls.
Prerequisite
The probe must be called as a tool with a tool length offset.
Tool type, preferably: 710
When using the cycle on a turning machine: set type 5xy and _CBIT[14]=0.
The probe must have been calibrated with "Determine active probe ball diameter".
Calibration with an additional "Determine position deviation" of the workpiece probe
improves the measuring precision.
NOTICE
Precise measurement is only possible with a probe calibrated under the measurement
conditions, i.e. working plane, orientation of the spindle in the plane and measuring velocity
are the same for both measurement and calibration. Deviations can cause additional
measuring errors.
176
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring cycles