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The Textile Magazine
jANUARY 2012
Y-Tester, for smarter yarn testing
new products
The concept of testing yarn for evenness at the labora-
tory has two main benefits – to test the yarn and confirm
whether its qualities are within the specified limits, and
to eliminate periodic faults generated by machines.
The progress in textile digital electronics has opened
up new boundaries paving way for newer testing op-
portunities and reduced cost of testing. TeFoc, in its
pursuit of newer technologies, is introducing Investa’s
Y-Tester, which can be an alternative to the laboratory
evenness tester and can provide users with newer op-
portunities of testing.
Mr. Jan Blasko, Sr., Technical Manager of Investa
Uni and former scientist at the Czech Textile Research
Institute VUB, has, in association with his former col-
leagues, developed the Y-Tester, the unique instrument
which simplifies yarn testing. With opportunities for
more meaningful testing of yarn spinners can produce a
consistently high quality yarn throughout.
The use of latest digital electronics and sensor elec-
tronics has made the model simple. The system has a
control unit attached to an optical sensor – the whole
equipment is compact and can be easily carried – with
provision of large storage of data, USB connectivity for
transfer of data, etc.
The system can check the unevenness of CV% of
yarn, U% of yarn, imperfections in yarn, spectrogram
analysis, etc. It can also provide detailed statistical anal-
ysis of data.
The system can be programmed for testing short yarn
length (starting from 8 metres). It can be taken to the
ring frame or open end machine, and each spindle/rotor
can be tested for short lengths. The unevenness CV% of
the yarn produced at each spindle/rotor is measured. If
CV% in a particular spindle/rotor is within the average
CV% value it could mean that the quality of yarn pro-
duced at the spindle/rotor is good and the operator could
proceed to check the next spindle/rotor.
As the testing of short length with the Y-Tester takes
less than a minute it is possible to check a large volume
of spindles/rotors a day and identify those that are pro-
ducing bad quality yarn. These spindles/rotors, which
are giving high CV%, can further be checked for longer
length of 100 metres and above and measure U%, im-
perfections, spectrogram faults and count variations.
Yarn quality studies
Another application where the Y-Tester comes in
handy is while studying the performance of various
components of the spinning machine. For instance, for
components like cots, aprons, spacers, bobbin holders,
etc., performance analysis can be done immediately,
whereas with the conventional laboratory equipment
this study is a long-drawn out process.
With all these data the factors for production of bad
quality yarn can be identified and corrected instantane-
ously.
The system can also be used in ring spinning mills and
open-end mills without evenness tester as it this elimi-
nates the need for an evenness tester at the laboratory.
As the system is mobile it can be used for checking of
yarn anywhere and everywhere.
With all these new opportunities the mills using this
equipment can maintain a high quality level and stay
above competition.
For details, contact: TeFoc Machineries, No. 301,
Police Kandasamy Street, Behind Thasami Nest, Puli-
yakulam, Coimbatore - 641 045. E-mail: info@tefoc.
com
w
Control Unit
Sensor unit
Testing on ring spinning