Siemens SINUMERIK 840D sl Programming Manual page 165

Note
If the machine does not proceed as expected when the calibration ball is being scanned, the
basic orientation and travel direction of the rotary axes should be checked (has DIN
conformity been maintained when defining the axes?)
Starting position
The probe must be prepositioned in the direction of the tool orientation (ORI) above the
highest point of the calibration ball (probe aligned with ball center point). After approaching
the starting position, the distance (A) from the calibration ball should be as short as possible.
Figure 2-18
Note
Measure kinematics is also possible with active 5-axis transformation (TRAORI).
As a prerequisite for measuring the kinematics with active TRAORI, the vectors of the 5-axis
transformation must be roughly set. The positions for measuring the kinematics are
approached in the user program with active transformation. During the actual measurement
with the calibration ball, CYCLE996 switches off the transformation and switches it on again
after the measurement.
Measuring an individual ball position
Once the probe has been positioned in accordance with user specifications above the ball,
either manually or by the part program (starting point of CYCLE996), the calibration ball is
scanned by calling CYCLE996 and the current ball position is measured.
To this end, the user should parameterize and call CYCLE996 separately for each ball
position.
Measuring cycles
Programming Manual, 02/2011, 6FC5398-4BP40-0BA0
Starting position
Measuring variants
2.3 Measure workpiece (milling)
165