MTS 709 Alignment System - Manual (Page 77)

709 Alignment System Specimen 77
Target Class
This selection defines the target class for the alignment resolution.
The level of the machine alignment can be described according to the criteria
specified in the following table and shown graphically in the following figure
where:
a is the axial strain
b
max.mc
is the maximum bending strain
β
mc
is the percent bending
C LASS A BS ( A ) < 1000
MICRO - STRAIN A BS ( A ) ≥ 1000
MICRO - STRAIN
2 b
max.mc
≤ 20 micro-strain β
mc
≤ 2%
5 b
max.mc
≤ 50 micro-strain β
mc
≤ 5%
10 b
max.mc
≤ 100 micro-strain β
mc
≤ 10%
20 b
max.mc
≤ 200 micro-strain β
mc
≤ 20%
400
300
200
100
0
0
Class 20
-3000 -2000 -1000 1000 2000 3000
Class 10
Class 5
Class 2
Compression
Axial Strain, a (micro-strain)
Tension
Maximum
bending
strain,
b
max.mc
(micro-strain)