Yarn count measurement by Beesley Balance
Beesley balance is used to measure the count of yarn.
It is more useful in the case of measuring the count of yarn from a small fabric sample.
Sometimes a small piece of fabric comes for testing and the count of warp and weft thread of a particular piece is required. In this case, Beesley's balance is very useful.
Its design is such a way that it can use to directly read the count when the sample size is small.
This instrument consists of a simple beam, adjusting screws and a hook for threads, and a standard template.
A simple beam is used to balance weight.
Adjusting screws are helpful for the primary adjustment of balance for appropriate results.
The hook is used to hang the specimen fibres.
A standard template is used to prepare samples.
Before testing in Beesley balance it is necessary to cut warp or weft threads in a particular length.
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| Beesley Balance |
According to fibre types, this cutting takes place with the help of standard templates.
Standard temples are basically thin metallic or plastic strip that has particular length and width indicators according to fibre types.
The length of the template is depending upon the count system required.
i.e. - For cotton fibres, Cut warp and weft threads in the length of the standard template shown from the cotton fabric sample.
To measure the count of those warp and weft threads used to balance.
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| Beesley balance fabric sampling template |
Balance is initially levelled to bring the pointer opposite a datum line.
(Datum line basically represents the balance of Beesley.)
A standard weight is hung in a notch on the beam arm on the pointer side of the pivot.
This will lead balance indicator at the bottom-most position.
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| Beesley balance |
Then hand prepared a sample of fibres on another side of the hook.
This standard length of fibres is added to the hook one by one until the pointer is the exact opposite of the datum line.
The number of fibres that hang in the hook is the count of those threads.
That number of threads is balanced by the Beesley instruments and that is the count of those threads.
When used in the analysis of small samples of fabric, a rough estimate of the crimp should be made and the count correct.
Limitations of Beesley balance
It is a very time-consuming and laborious process.
It is less efficient due to the higher number of error generations.
It is only applicable for that fabric samples that are added in standard templates.
Measure the count of other fabrics it is not suitable.
However, for the cheaper level of testing and for specific 2-3 types of fabric this system is useful.
Questions -
- What is beesley balance?
- Why beesley balance is used?
- How beesley balance works?
- What is beesley balance fabric sample template?
- What are the limitations of beesley balance?
References
Lord, P. R. (2003). Handbook of yarn production: Technology, science and economics (1st ed.). Woodhead Publishing.
NPTEL IITm. (n.d.). Nptel.Ac.In. from https://nptel.ac.in/courses/116102029
Saville, B. P. (1999). Physical testing of textiles. Woodhead Publishing.
Testometric co. Ltd. (n.d.). Testometric.co.uk. from https://www.testometric.co.uk/
Yarn tests. (2019, July 23). ATIRA; Ahmedabad Textile Industry’s Research Association. https://atira.in/yarn-tests/
(N.d.). Textilelearner.net. from https://textilelearner.net/classification-of-textile-testing-fiber-testing-yarn-testing-fabric-testing/
Sayed, A. (n.d.). Yarn count: Definition and Types. Blogspot.com. from https://textileapex.blogspot.com/2014/01/yarn-count-types.html
Further reading -
(Part-1) Yarn count / Linear density of yarn
(Part-2) Yarn count - by Direct, indirect method
(Part-3) Yarn count measurement - preparation of hank
(Part-4) Yarn count measurement by wrap, Quadrant balance
(Part-5) Yarn count measurement - Beesley balance
(Part-6) Yarn count measurement - Shirley method
Writer - DSPAT Team
