R25 Variable Measuring Speed; R27 Multiple Measurement At Same Location; R28 Multiplication Factor For Measurement Path 2A; R29 Weighting Factor K For Averaging - Siemens SINUMERIK 840 User Manual

07.90
2.8

R25 Variable measuring speed

The measuring speed can be selected arbitrarily with R25. A feed rate of 150 mm/min is
preset as standard when R25 = 0. This value increases automatically to 300 mm/min, when
the measurement path a is modified via R28 (R28>1). The maximum measuring speed should
be selected to be such that safe deceleration within the probe deflecting path is ensured (see
Section 1.5.2, s-t diagram).
2.9

R27 Multiple measurement at same location

The number of measurements at the same location can be determined with R27. The
set/actual difference D is determined arithmetically.
n = Number of measurements
Note:
Make sure that the permissible R parameter value of +- 99 999.999 is not exceeded, because
with multiple measurement actual values are summed up.
2.10

R28 Multiplication factor for measurement path 2a

Normally, the path increment a is 1 mm. It can, however, be increased when calling measuring
cycles with parameter R28. The maximum value for R28 is calculated as follows:
R28
2.11

R29 Weighting factor k for averaging

Different weighting can be given to an individual measurement with weighting factor k. Hence,
the new tool compensation is only partly influenced by an new measurement result, depending
on k (see Section 1.6.2).
©
Siemens AG 1990 All Rights Reserved
SINUMERIK 840/850/880 (BN)
S + S + .... S
1 2 n
D =
n
Axis traversing path
=
max
2
6FC5197- AB70
2 Defining Parameters
2.8 R25 Variable measuring speed
max
2–9