Measuring Accuracy - Siemens SINUMERIK 840 User Manual

07.90
1.5.3

Measuring accuracy

The repeat accuracy of SINUMERIK controls for in-process measurement is ±1 µm.
The attainable measuring accuracy therefore depends on the following factors:
• Repeat accuracy of machine
• Repeat accuracy of probe
• Resolution of measuring system
To give an example, the following series of measurements have been carried out on a turning
machine:
Material: Cr Ni steel X 10 Cr Ni Nb 18 9
Actual
value
[µm]
50 Measuring with calibration
40
30
20
10
0
-10
0
10
Fig. 1.18 Measuring accuracy
©
Siemens AG 1990 All Rights Reserved
SINUMERIK 840/850/880 (BN)
Probe body:
12
Correction value
20
30
Number of parts
6FC5197- AB70
1 Introduction
1.5.3 Measuring accuracy
Correction
value [µm]
Measuring
point
11,1
Actual dimension
50
40
50
40
30
20
10
0
-10
60
1–17