Siemens SINUMERIK 840D sl Programming Manual page 45

2/3 workpiece tolerance _TMV
_TMV is active only for workpiece measurement with automatic tool offset.
Within the range of "Lower limit" and "2/3 workpiece tolerance" the mean value is calculated
according to the formula described in Section "Measuring strategy".
Note
My
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My
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• If My
• If My
Weighting factor for mean value calculation _k
_K is active only workpiece measurement with automatic tool offset. The weighting factor can
be used to give a different weighting for each measurement.
A new measurement result thus has only a limited effect on the new tool offset as a function
of _K.
Lower limit (zero compensation area) _TZL
_TZL active for
• Workpiece measurement with automatic tool offset
• Tool measurement and calibration for milling tools and tool probes
This tolerance range corresponds to the amount of maximum accidental dimensional
deviations. It has to be determined for each machine.
No tool compensation is made within these limits.
In workpiece measurement with automatic tool offset, however, the mean value of this
measuring point is updated and re-stored with the measured actual/set difference, possibly
compensated by an empirical value.
The tolerance bands (range of permissible dimensional tolerance) and the responses
derived from them are as follows:
• For workpiece measurement with automatic tool offset
Measuring cycles
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
is compared with the zero compensation range:
is greater than this range, compensation is corrected by My
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mean value memory is cleared.
is less than this range, no compensation is carried out. to prevent excessively
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abrupt compensations.
1.10 Parameters for checking the measurement result and offset
General
and the associated
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