Siemens SINUMERIK 840D sl Programming Manual page 232

Measuring Cycles for Milling and Machining Centers
5.9 CYCLE997 workpiece: Measuring a sphere and ZO determination
height of the center point setpoint and the 1st measurement is taken Then P2 to P4 are
approached and measured parallel to the axis.
P2 is approached via positioning of the applicate at distance _FA above the sphere (setpoint
diameter) and lowering to measuring height again (setpoint center point of applicate). P3 and
P4 are approached in the same way.
P3 and P4 lie at the center derived from P1 and P2 (actual value center point of abscissa).
The applicate is positioned from P4 to a distance _FA above the sphere and then
approached in the abscissa, ordinate of the calculated actual value point (P5). The last
measurement is taken: in the minus direction of the applicate.
After this measurement, the applicate is positioned to safety height (height as beginning of
the cycle).
When 3 spheres are measured, the abscissa, ordinate are positioned toward the set center
point of the next sphere. Procedure continues as above.
No sphere fixture or other obstacle must be located in this entire traversing range. It may be
necessary to select this measuring variant with intermediate positioning on a circular path
(_MVAR=xx1109). The position and number of measuring points is then variable.
Next process for measuring variant "Measurement at an angle" (_MVAR=x11x9):
With _STA1 (starting angle) the angle position of P1 is defined, with _INCA, the incremental
angle after P2 and then after P3. If the measuring variant is selected with 4 measuring points
on a circle (_MVAR=1x1109), _INCA is also valid from P3 to P4.
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Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring cycles