L974 Workpiece Measurement - Siemens SINUMERIK 840 User Manual

08.96
4.3

L974 Workpiece measurement

Function and application
The measuring cycle ascertains the actual value of the workpiece in the selected measuring
axis with respect to the workpiece zero point and the set/actual difference. As from Version 3.5
the function "Mirroring" can also be active in the axes concerned.
An empirical value stored in the SDC is then allowed for with the correct sign. The average
value is formed over several parts and the tolerance bands are checked as described in Sec-
tion 1.7.
The cycle corrects automatically the zero offset memory/compensation memory selected via
R10 in the measuring axis (define tool type).
Measurements can be performed in all axial directions without restriction (inside/outside dia-
meters, holes, slots).
Selection of the measurement variant is carried out via definition of R23:
R23 = 0 1-point measurement ZO determination
R23 = 21 1-point measurement
R23 = 22 1-point measurement with reversal
R23 = 23 2-point measurement on diameter; inside without protection zone
R23 = 24 2-point measurement on diameter; inside with protection zone
R23 = 25 Multi-point measurement on circumference
R23 = 26 Multi-point measurement on cylinder
1
5
2
3
Fig. 4.8 Start positions
See Section 10.2 for result display parameters.
©
Siemens AG 1990 All Rights Reserved
SINUMERIK 840/850/880 (BN)
Start position
1: - X Outside diameter
2: +X
4
3: +X
4: - Z Measure length
5: +Z
W
6FC5197- AB70
4 Measuring Cycles for Turning Machines
4.3 L974 Workpiece measurement
Inside diameter
Outside diameter
(Calibrating and measuring
beneath turning centre:
Set value negative)
Measure length:
(left of workpiece zero point in
+Z direction:
Set value negative)
4–23