Siemens SINUMERIK 840D sl Programming Manual page 474

Glossary
Tool number
The parameter _TNUM contains the tool number of the tool to be automatically offset after
workpiece measurement.
Trigger point
The trigger points of the probe are ascertained during calibration and stored in block GUD6
for the axis direction.
Variable measuring speed
The measuring velocity can be freely selected by means of _VMS. The maximum measuring
velocity must be selected to ensure safe deceleration within the probe deflecting path. ->
Measuring velocity
Weighting factor for mean value calculation
The weighting factor k can be applied to allow different weighting to be given to an individual
measurement.
A new measurement result thus has only a limited effect on the new tool offset as a function
of k.
Zero offset area
This tolerance range (lower limit _TZL) corresponds to the amount of maximum accidental
dimensional deviations. If the absolute value of the actual/set difference is less than the zero
offset range, the offset is not applied.
ZO determination
In the result of a measurement, the actual-setpoint value difference is stored in the data set
of any settable zero offset.
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Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring cycles