Siemens SINUMERIK 840D sl Programming Manual page 31

Measurement operation sequence using the example set edge (CYCLE978)
Figure 1-7
The sequence is described using the measuring version, set edge (CYCLE978). The
sequence is essentially the same for the other measuring cycles.
The starting position for the measuring procedure is the position DFA in front of the specified
set position (expected contour).
Figure 1-8
The starting position is calculated in the cycle based on parameter entries and probe data.
The traversing distance from the pre-position, defined by the user program, to the starting
position of the measuring distance is either traversed with rapid traverse G0 or with
positioning speed G1 (depending on the parameter). From the starting position, the
measuring velocity is effective, which is saved in the calibration data.
The switching signal is expected along path 2 · DFA as from the starting position. Otherwise,
an alarm will be triggered or the measurement repeated.
The resulting maximum measuring position is available in the result parameters _OVR[ ] and
_OVI[ ] of the measuring cycle.
Measuring cycles
Programming Manual, 02/2011, 6FC5398-4BP40-0BA0
Measurement operation sequence, example set edge (CYCLE978)
Starting position
Description
1.8 Measurement principle
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