Operational Sequence - Siemens SINUMERIK 840D sl Programming Manual

Measuring Cycles for Turning Machines
6.5 CYCLE974 workpiece: 1-point measurement
Measurement of inside diameter and offset T8
Procedure as described for "Measurement output diameter".
Offset of T8 with appropriate modified values _EV[13], _MV[13] (EVNUM=14), _TUL, _TLL,
_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").
6.5.3.3

Operational sequence

Position before measuring cycle call
The probe must be positioned opposite the surface to be measured.
Position after end of measuring cycle
On completion of measurement, the probe is positioned facing the measuring surface 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