Loepfe YarnMaster Zenit - Yarn Fault Classification

ZENIT
11
YARN CLEARING GENERAL
Figure 1
Diameter Y
Length X
Figure 2
Length
Figure 3
Yarn Fault Classification
Yarn faults are defined in terms of a transverse dimension
and a longitudinal dimension. The transverse dimension is ex-
pressed as a multiple of the base diameter and the longitudinal
dimension in centimeters.
The definition of yarn faults in terms of length and thickness
suggests the representation of yarn faults in a Cartesian sys-
tem of coordinates. Thereby the length is plotted in the hori-
zontal direction (X-axis), and the thickness in the vertical direc-
tion (Y-axis). Each yarn fault can, thus, be plotted as a point in
the plane of the coordinates. Furthermore, the plane of the co-
ordinates can be divided into individual fields (classes) in order
to summarize (classify) similar yarn irregularities into groups
and to count them. This takes into account another extremely
important point of view, namely the frequency of similar faults
(see figure 1)
Frequency distribution of yarn faults in the coordinate grid
The choice of the class limits is largely random. Short faults
are most frequently divided into 16 thickness classes (see
figure 2).
The classification scheme can be extended to include addi-
tional classes for long faults and thin places. The YarnMaster
System uses the following classification (see figure 3).
Diameter
2 2 2 4 2 4 2 8
1 1 1 3 1 3 1 7
2 2 2 4 2 4 2 6
1 1 1 3 1 3 1 5
2 2 2 4 2 4 2 4
1 1 1 3 1 3 1 3
2 2 2 4 2 4 2 2
1 1 1 3 1 3 1 1
3 3 6 3 6 9 3 6
2 2 5 2 5 8 2 5
1 1 4 1 4 7 1 4
1 1 2 1 2 3 1 2
1 1 2 3 1 2 1 2
1 1 3 5 1 3 1 3
2 2 4 6 2 4 2 4
1 1 2 3 1 2 1 2
N4
A4 B4
C4 D4
N3
N2
N1
A3 B3 C3 D3
D2
A2 B2 C2
A1
B1 C1
D1
C0
F G
G00
F00C00 D00
-C0 -D0
-D1
H0
-C1
H1
I0
I1
I2H2
-D2-C2
D0
E
7.00
5.00
3.90
3.20
2.70
2.30
2.10
1.80
1.60
1.45
1.30
1.20
0.83
0.80
0.75
0.65
0.5 1.0 1.5 2.0 3.0 4.0 6.0 8.0 12.0 20.0 32.0 70.0