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The Textile Magazine
August 2012
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43
ess. The aim is to make apparently ‘random’ effects
totally controllable and repeatable.
USTER’s Fancy Yarn Profile tool, as part of the
USTER TESTER 5, has made this possible and provid-
ing tangible benefits on a daily basis: “The ability to
evaluate fancy yarn characteristics, their relationship
with the manufacturing process and their effect on ul-
timate fabric appearance has given us great confidence
in controlling the yarn quality with the help of the
Fancy Yarn Profile from USTER,” says Chokshi.
The Fancy Yarn Profile is based on precise sensor
technology to measure and analyze slub yarns and fea-
tures specially-tailored software to provide users with
detailed reports on all important characteristics of the
yarn. Aspects such as slub length and frequency, mass
increase and decrease at critical points are accurately
calculated to determine numeric values for yarn qual-
ity.
New standard for slub yarn measurement
A novel feature of the latest software is the option to
display a spectrogram with removed slubs, allowing
the yarn to be checked for periodic faults. Mass dia-
grams can reveal potentially damaging long distances
in the yarn where slubs are missing (see the accompa-
nying diagram).
A series of diagrams can also display graphically the
major characteristics of the slub yarn.
Data from scatter plot and histogram analyses can
be combined into three-dimensional graphics showing
mass increase, slub length and frequency. Overview
information from the system can provide management
with a daily quality control report, including fabric
appearance and details of any loss of production ef-
ficiency in knitting or weaving.
Practical customer experience underlines the value
of the Fancy Yarn Profile and how it can be adapted
to solve various challenging issues. “It is most impor-
tant to know all the parameters related to slub yarns,
along with the matrix and all histograms. It helps to
do sustainable R&D, to produce innovative fancy yarn
effects. Most importantly, it offers the ability to deliver
the required consistent fancy yarn quality – right
first time through the instrument without producing
trial fabric and
waste,” Chokshi
unveils.
More benefits
result when the
company applies
data from the
various reports
to specific
problems or defects, using each test parameter to help
understand the effect of different cottons to produce
a particular type of slub yarn. The most demanding
tasks – mixing differing slub types and yarn counts and
working with complex effect patterns – can only be ac-
complished by using the special software of the Fancy
Yarn Profile. Knowing all this brings us to the conclu-
sion that the USTER TESTER 5 is leading the denim
revolution, thanks to the Fancy Yarn Profile tool.
w
case study