Testex - Model TY370 -Twist Tester

The test principle

The instrument carries out the specimen test driven by the CPU management. One end of the test sample is clamped in the jaws of the moving gripper while the other end is in the jaws of the rotating gripper under the standardized pre-tension. Then rotating the sample at a specified speed until it untwists. Next, twist the sample again. Finally, the moving gripper will be back to the original position instead of being in the original zero zones.

How to Measure the Number of Twists in Yarn?

In order to measure the number of twists per unit length of yarn, testers often untwist a known length of the yarn and check to see whether the twist has completely appeared in a visual way. Besides, there are two methods of twist measurements. The first one is the straightened fiber technique or the direct count method. The second is the twist contraction technique or the untwist and re-twist method.

The Twist Tester is used to get the coefficient of twist, which is a measurement of the level of twist of the yarn and is suitable for testing single or plied yarns. Besides, it is equipped with auto stop & reverse for conventional or untwist/re-twist methods. Therefore, yarn twist testing is an easy task for textile testing labs or factories by applying the instrument.

Twist tester offers adjustable test lengths up to 500mm/20 inches for S & Z twist yarns, and the inching function helps the operator to get an esteemed twist quickly. Moreover, the touch screen can directly show the test result in TPI / TPM.

• Touch screen
• 4 test methods         Direct counting, untwist/re-twist, 3- times untwist/re-twist method, etc.
• Length of the specimen    0~500mm adjustable

• Twist speed        100 ~ 1900 rpm
• Yarn count range  1 ~ 499.9 tex
• Unit         TPM / TPI
• Twist range10~4999