Siemens SINUMERIK 840D sl Programming Manual page 206

Measuring variants
3.3 Measure workpiece (milling)
Positioning between the spheres is realized along a straight line at the height of the starting
position of the 1st sphere. The parameter settings – such as the number of measuring points,
determining the diameter, diameter – apply to all three spheres.
Measure: 3 spheres (CYCLE997),
Example of "paraxial positioning"
Correction of the work offset (WO)
After the measurement of the 3rd sphere, a work offset is calculated from the measured center
points of the balls. This consists of translatory components (offset) and rotary components
(rotation), and describes the position of the workpiece on which the spheres are mounted.
During the correction, the triangle of the determined sphere center points includes the specified
center point setpoint position (workpiece coordinates). The sum of the deviations of the
spheres to each other must be within the value of parameter TVL. Otherwise no correction is
performed and an alarm is output.
Requirements
● The probe must be called as a tool with tool length compensation and be active.
● Tool type of the probe: 3D multi probe (type 710)
● In the active WO, the approximate values for the position of the spheres regarding offset
and rotation are entered and activated. The value in the offset of the WO refers to the 1st
sphere.
● Only minor deviations from the actual position of workpiece from the cycle can be expected.
● The sphere diameter must be significantly greater than the ball diameter of the probe stylus.
206
Measure: 3 spheres (CYCLE997),
Example of "positioning on a circular path"
Programming Manual, 12/2017, 6FC5398-4BP40-6BA1
Measuring cycles