L974 1-Point Measurement - Siemens SINUMERIK 840 User Manual

4 Measuring Cycles for Turning Machines

4.3.2 L974 1-point measurement

4.3.2 L974 1-point measurement
Function and application
The measuring cycle ascertains the actual value of the workpiece in the selected measuring
axis in relation to the workpiece zero point and the set/actual difference.
An empirical value stored in the SDC is subsequently allowed for with the correct sign.
In addition, the average value is formed over several parts and the tolerance bands are
checked (Section 1.7.1).
The probe is located at a distance "a" facing the measuring surface on completion of
measurement.
No automatic compensation or a length compensation is carried out, depending on the defi-
nition of R10.
Preconditions:
• The workpiece must be positioned with M19 prior to cycle call when necessary.
• The probe must have been calibrated in the direction of measurement.
• The probe must be positioned with tool offset and without G53 to face the surface to be
measured (Fig. 4.9).
• The maximum diameter that can be measured depends on the traversing range of the
turret slide in +X.
Outside diameter:
D = 2×(X
max MFmax
Inside diameter:
D = 2×(X
max MFmax
4–26
_ _
X ) + 2a
F ball
_ _ _
X ) 2a
F ball
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Siemens AG 1990 All Rights Reserved
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SINUMERIK 840/850/880 (BN)