L978 Paraxial Multipoint Measurement - Siemens SINUMERIK 840 User Manual

10.91
5.4.3

L978 Paraxial multipoint 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.
In this cycle, the actual value is calculated on the basis of the arithmetic mean of "n" values
offset by R19 along the measuring axis (R30).
An empirical value stored in the SDC is subsequently allowed for with the correct sign.
In addition, averaging is performed over a number of parts and the tolerance bands are
checked (see Section 1.7.1).
The probe faces the measuring surface at a distance of "a" on completion of measurement.
No automatic offset is carried out or alternatively length compensation or radius offset
(difference halved) is performed, depending on the definition of R10.
When differential measurement is selected (R23 = 12) only MP1 is measured twice.
Preconditions:
• The probe must be positioned with tool offset and without G53 to face the surface to be
measured and measuring point number 1 (MP1) (allow for offset distance).
• Parameter R19 specifies the distance between two measuring points along the measuring
axis.
©
Siemens AG 1990 All Rights Reserved
SINUMERIK 840/850/880 (BN)
5 Measuring Cycles for Milling Machines and Machining Centres
5.4.3 L978 Paraxial multipoint measurement
6FC5197- AB70
5–73