# Working Principle of Quadrant Balance for Yarn Count Easy Way/Lab Report

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Content Index

## Name of the Experiment:

Lab report on determination of yarn count by using Quadrant Balance

## Introduction:

Quadrant Balance is another instrument. By using this instrument, yarn count can be calculated directly from the scale. Quadrant Balance can be used to determine the number of samples if they have a length less than 120 yards. Yarn count balance that is directly read using a quadrant scale attached to a pillar. As, the pointer is pivoted so that it moves over the scale face at the top of the pillar. Additionally, a crossbeam is pivoted on the same pivot as the pointer and has a sample hook and a counterweight at its other end. The counterweight determines the instrument’s capacity. Any weight added to the sample hook causes the pointer to move in front of the scale.

## Objectives:

1. To know about yarn count.
2. Come to learn about Quadrant Balance.
3. To know how to calculate yarn count by using Quadrant Balance.

## Measurement scale for Quadrant Balance:

1. First scale may read from 0.1 to 1.0 to give the count of a 4 yds sliver.
2. Second scale may read from 0.1 to 0.6 for 20 yds roving.
3. Third scale may read from 4s to 80s for 840 yds yarn.

## Standard testing temperature:

An atmosphere at the prevailing barometric pressure with a relative humidity of 65% and temperature of 200 C is called standard testing temperature.

## Apparatus:

1. Wrap Reel.
3. Yarn Package.
4. Scissor.

## Working Procedure:

1. Select a suitable package of yarn, either cheese or cone form.
2. Take a 4-yard length of yarn and measure it using a ruler.
3. Ensure precision in measurement as slight tension differences can affect the count.
4. Secure the yarn by tying a knot to prevent any unraveling, forming a dense mass of cotton.
5. Hang the weighed cotton yarn on the hook of a quadrant balance.
6. Directly measure the count from the quadrant scale.
7. Repeat this entire procedure five times.
8. Also, repeat the entire process for a 40-yard length of yarn.
9. Record five values for each measurement.

## Result:

Finally, we found average count 50.4

## Conclusion:

Whenever the length of the yarn is less than 120 yards, then Quadrant Balance can be used to calculate yarn count. By participating in this experiment, we learned how Quadrant Balance works and also what the result is. Thanks to our teacher for helping us. We can use this knowledge in the future.