Uster evenness tester pdf merge

The yarn package was tested in the laboratory with all test modules of the uster tester 5. Uster evenness tester or uster tester5 principle of. The result obtained by this mc is affected by moisture content of material. That means the uster tester 6 is no longer described merely as an evenness tester it now qualifies for the title of the total testing center, giving managements the power to control both quality and productivity across the entire spinning mill. This includes the most advanced equipments like uster evenness tester iii. Uster technologies ag is the leading high technology instrument manufacturer of products for quality measurement and certification for the textile industry. To ensure uster standards at all times, the mill has invested in major testing equipments for testing cotton and yarn. While testing ring yarn in uster evenness tester the peak observed around 9 cm.

A dynamic and robust image processing based method. Refer to your evenness tester operations manual for recommended sliver thread up and guiding procedures. It provides the key to uster s unique think quality approach. An analysis of growth and development of textile industry. Uster tester 6, for successful quality management of. The most disturbing feature is that eve n the objectionable faults are four times more. Comparison of two different yarn evenness test methods.

In addition, the unevenness of yarns will seriously influence the appearance quality of textiles. The uster tester is the heart of the laboratory in most mills around the world and is acknowledged as the global standard. Measurement of imperfection thick,thin place, eps mass analysis. The yarn to be examined is passed through a pair of parallel plates of a capacitor whose capacitance is continuously measured electronically. It contains a discussion of the principles of unevenness testing and refers to the thenpopular unevenness tester, the 1960s model of the uster evenness tester. The groundbreaking uster tester 6 hosts uster quality expert, linking accurate laboratory testing with data from inline systems such as uster quantum 3. The uster evenness tester measures the thickness variation of a yarn by measuring. Kumarswamy and sheriff 5 conducted a study with count group from 29s ne to 40sne over. Textile engineers in ring spinning industries are fully dependent on uster yarn evenness tester to decide yarn qualities as per customer. Also, it is very important to follow proper sliver collection and evenness tester thread up and guiding procedures to get the most accurate evenness results. The usual yarn evenness testing methods mainly include the length. A visionbased method for analyzing yarn evenness international. For this purpose a test time of 20 minutes and a test speed of 400 mmin was selected.

Sliver should be tested as soon as possible after being brought into the laboratory. These test conditions were selected in order to see at least 2 or 3 bobbin changes in the diagram within the test period. Uster tester 5 measured evenness is based on mass variation across a given length other than yarn diameter. Uster technologies ag sonnenbergstrasse 10 8610 uster switzerland t. The uster tester 5 uses two parallel light beams creating double illu mination on the yarn to measure these parameters optically in a two dimensional environment at a high degree of precision. In this instrument material up to a certain thickness can be tested. When uster technologies decided to develop the uster tester 5 it was the intention to increase the test speed of slivers, rovings and yarns by 100%. The evenness tester of uster technologies finds the variations in thickness of a yarn by using capacitive techniques. Yarn evenness testing uster evenness tester textile course.