Siemens SINUMERIK 840D sl Programming Manual page 361

Explanation of example
Measurement of outside diameter and offset T8
The difference calculated from the actual value and setpoint is compensated for by the
empirical value in the empirical value memory _EV[2] and compared with the tolerance
parameter:
• If it is more than 0.5 mm (_TSA), alarm "Safe area violated" is output and program
• If it is more than 0.04 mm (_TDIF), no compensation is performed and alarm "Permissible
• If values _TUL= -0.01, _TLL=0 are violated upward or downward, the length of T8 D1 is
• If 0.005 mm (_TMV) is exceeded, the length in T8 D1 is compensated 100% by this
• If it is less than 0.005 mm (_TMV), the mean value is calculated (only if _CHBIT[4]=1! with
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").
Measuring cycles
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
execution cannot be continued.
dimensional difference exceeded" is output and the program continues.
compensated 100% by this difference. Alarm "Oversize" or "Undersize" is displayed and
the program is continued.
difference.
mean value memory) with the mean value in mean value memory _MV[2] and by
including weighting factor (_K=3).
– If the mean value obtained is >0.002 (_TZL), the reduced compensation of the length
1 for T8 D1 is the mean value/2 and the mean value is deleted in _MV[2].
– - If the mean value is <0.002 (_TZL), there is no offset but it is stored in the mean
value memory _MV[2] if mean value storage (_CHBIT[4]=1) is active.
Measuring Cycles for Turning Machines
6.6 CYCLE994 workpiece: 2-point measurement
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