General Information; Measuring And Tool Offset - Siemens SINUMERIK 840D sl Programming Manual

Measuring Cycles for Milling and Machining Centers
5.6 CYCLE979 workpiece: Measure hole/shaft/groove/rib at an angle
5.6.3

Measuring and tool offset

5.6.3.1

General information

Function
Using this measuring cycle and various _MVAR=1...4
measuring variants, the contour elements hole, shaft, groove, web, can be measured at an
angle.
Automatic tool offset is also possible. This tool is specified in _TNUM and _TNAME. The D
number and type of offset are specified in coded form in variable _KNUM.
From measuring cycles SW 6.3, extended tool offset is available. With this function a tool
from a particular stored tool environment _TENV, and additive, setup offsets can be
corrected by specifying the DL number in _DLNUM.
Detailed information on the parameters: see Parameter description section "Description of
the most important defining parameters".
Empirical values and mean values
An empirical value stored in data block GUD5 in array _EV[ ] can be included in calculation
of the result after measurement is completed.
Optionally, averaging is performed over a number of parts (array _MV[ ]) and the tolerance
bands are checked.
Both are activated in _EVNUM (see Parameter description Section "Description of the most
important defining parameters").
Parameter
Parameter
_MVAR
_SETVAL
_CPA
_CPO
_STA1
_ID
_INCA
5-88
Data type Meaning
1 Measure hole with tool offset
2 Measure shaft with tool offset
3 Measure groove with tool offset
4 Measure web with tool offset
REAL, >0 Setpoint diameter, width (acc. to drawing)
REAL Center point of abscissa
(with reference to workpiece zero)
REAL Center point of ordinate
(with reference to workpiece zero)
-360 to Start angle
+360
degrees
REAL Incremental lifting of applicate with prefix
(only measure with web, lift for crossing)
-360 to Indexing angle (only for measuring hole or shaft)
+360 useful values for 3-point measurement: -120 ... + 120 degrees
degrees useful values for four-point measurement: -90 ... +90 degrees
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring cycles