Yarn Twist Tester, is designed to determine yarn twists in single or plied yarns, quadrant type with auto stop & reverse for conventional or untwist/re-twist methods. Twist Tester Machine complies with ISO 2061, ASTM D1422/1423, BS 2085, etc. The Twist Test is essential in textile testing.

Product Detail

Application：

The Twist Tester is a precision instrument designed to determine the coefficient of twist, providing an accurate measurement of yarn twist levels. It is suitable for both single and plied yarns, making it an essential tool for textile testing labs and factories. Equipped with auto-stop and reverse functionality, the tester supports both conventional and untwist/re-twist methods, simplifying the yarn twist testing process.

Key features include adjustable test lengths of up to 500mm (20 inches) for S and Z twist yarns, offering flexibility for various testing needs. The inching function allows operators to fine-tune the twist measurement efficiently, ensuring precise results. Additionally, the user-friendly touch screen interface displays the test results directly in TPI (Twists Per Inch) or TPM (Twists Per Meter), enhancing ease of operation and accuracy.

This advanced Twist Tester is a reliable choice for optimizing yarn quality assessments in textile production and research environments.

Test Principle
The Twist Tester operates under precise CPU management to conduct specimen testing. The sample is secured with one end clamped in the moving gripper and the other in the rotating gripper, under standardized pre-tension. The rotating gripper rotates the yarn at a specified speed until it untwists completely. Afterward, the yarn is twisted again. Finally, the moving gripper returns to its starting position, though not exactly aligned with the original zero zones, ensuring accurate twist evaluation.

How to Measure the Number of Twists in Yarn
To determine the number of twists per unit length of yarn, the sample is untwisted over a known length, visually confirming the complete removal of twists. Two primary methods are used for twist measurement:

Straightened Fiber Technique (Direct Count Method):
This method involves straightening the fibers in the yarn and directly counting the twists. It is straightforward and effective for simple yarn structures.
Twist Contraction Technique (Untwist and Re-Twist Method):
In this method, the yarn is first untwisted to remove all twists and then re-twisted to reintroduce them. The number of twists is measured during this process, providing a reliable estimate for more complex or irregular yarns.

Standard Accessories：

Weight

Yarn pulling stand

Wire pulling needle

Standards：

GB/T2543.1.2, 14345, ISO2061, BS2085, ASTM D1422,1423, JISL1095

Key Specifications:

Model	XD-A06
Measurement range	for all kinds of yarns
Yarn tension	adjustable by a set of weights depending on the type of yarn
Rotating speed of gripper	1000 r/min, 800 r/min, slow inching speed
Length of measurement	25, 50, 100, 200, 250, 500 mm
Measurement quantity	no more than 99 cycles
Measurement method	a. Direct counting method; b. Untwist-retwist method; c. Double untwist-retwist method; d. Three-time untwist-retwist method

Method of measurement data output

a. Display output

b. Print output(OPTIONAL): Xi for twist value of each test; for average twist value of each batch of tests; Nn for number of tests; N1for number of tests below the average twist; S for mean square deviation; H for coefficient of mean deviation; CV for coefficient of variation; and α for twist factor

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