Yarn count testing:
The testing of the yarn count gets completed in below steps:
Preparation of Lea or skein of yarn:
The yarn package is placed on the cone holder in the wrap reel. Now the end of the yarn gets passed through a yarn guide. This end is tied with a screw fitted in the wrap reel. See below picture:
A counter meter is fitted in this wrap reel. This counter meter helps to count the number of wraps of yarn in the skein. Today's wrap reel is equipped with stop motion. When the number of wraps of yarn reaches to the pre feed number of wraps, the stop motion actuates immediately and stops the wrap reel.
The diameter of wrap reel gets equal to 1.5 yards. A lea or skein length of 120 yards is required for count testing. Thus the number of wraps is fixed in the counter meter. That is 80.
The wrap reel gets driven by a motor. When the set length reaches to feed number, it gets stopped immediately. Now the les gets off loaded manually. The initial end and final end are tied together firmly.
Weighing of Lea or skein of yarn
Now the lea of yarn is weighed in the electronic weighing scale. Make sure there is no error in weighing scale. If there is any error, please reset the weighing scale before weighing of Lea. Please se below picture:
Yarn count calculation:
Tensile strength = 159.8 kgs
= 159.8 X 2.204 lbs
= 352.19 lbs
C.S.P. =Yarn count( Ne) X tensile strength (lbs)
= 7.38 X 352.19
C.S.P. = 2599.16