Incremental Measurement - Siemens SINUMERIK 840D sl Programming Manual

Explanation of example
Before the program is started, the "tip" of the calibration tool T7 is in measuring axis X in a
range 2 · _FA=40 (dimension with reference to radius) in front of the probe. In axis Z, the
probe tip center is centered with respect to the probe.
When CYCLE982 is started, measurement starts in the negative X direction (_MA=2, MD=1)
with measuring velocity 300 mm/min (_VMS=0, _FA>1). The switching signal is expected by
the probe 1 (_PRNUM=1) within a distance of 2 · _FA=40 mm. Otherwise, an alarm will be
triggered. Measurement is performed once (_NMSP=1).
After successful measurement, the "tip" of T7 is in the starting position again.
The calculated probe value is entered in _TP[0,2]. Calibration with the measuring process
has been completed in minus X.
6.3.6

Incremental measurement

Function
This cycle and its various measuring variants are for measuring tools incrementally:
_MVAR=100001: Turning tools (machine-related)
_MVAR=100011: Turning tools (workpiece-related)
_MVAR=1xxx01: Milling tools, drills (machine-related)
_MVAR=1xxx11: Milling tools, drills (workpiece-related).
Workpiece-related or machine-related measurement require an appropriately calibrated tool
probe (see Subsection "Incremental calibrating").
With milling tools/drills, the measurement is further specified in the 3rd to 5th digits of
parameter _MVAR.
It is possible to measure single tool lengths, or alternatively for milling tools the cutter radius.
The calculated offsets are entered in the active D number. The offset is entered in the
geometry data and the wear data are reset (irrespective of _CHBIT[3]).
Only the offset value that is in the measuring axis _MA and measuring direction _MD can be
determined in a measurement.
If _CHBIT[20]=1, positioning of the milling spindle at the value of _STA1 can be suppressed
(see Subsection "Milling tool": Suppression of start angle positioning _STA1").
This is possible for milling cutter measuring variants:
_MVAR= xxx001 (where x : 0 or 1, no other values).
Measuring cycles
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring Cycles for Turning Machines
6.3 CYCLE982 tool: Measure turning and milling tools
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