Operational Sequence - Siemens SINUMERIK 840D sl Programming Manual

Measuring Cycles for Turning Machines
6.6 CYCLE994 workpiece: 2-point measurement
The results are entered in result field _OVR[ ]. The wear of the length L1 (KNUM=1, _MA=2)
of T8, D1 is included if a change is necessary.
Measurement of inside diameter and offset T9
Procedure as described for "Measurement output diameter".
Offset of T8 with appropriate modified values _EV[3], _MV[3] (EVNUM=4), _TUL, _SETVAL.
Note
The values of the workpiece tolerance parameters _TUL, _TLL were selected asymmetrically
in the example. The result is then made symmetrical (see Section "Tolerance parameters:
_TZL, _TMV, _TUL, TLL, _TDIF and _TSA").
6.6.1.3

Operational sequence

Position before measuring cycle call
The probe must be positioned opposite the positive measuring point.
Position after end of measuring cycle
After the end of measurement, the probe is facing the negative measuring point at distance
_FA.
NOTICE
Precise measurement is only possible with a probe calibrated under the measurement
conditions, i.e. working plane and measuring velocity are the same for both measurement
and calibration.
If the probe is used in the spindle for a powered tool, the spindle orientation must also be
considered. Deviations can cause additional measuring errors.
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Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring cycles