Yarn Crimp Rigidity, Twist Tester, Appearance, Evenness Tester

Automatic Twist Tester

Twist Tester, Digital, Automatic, Manual, Double Yarn, Spun Yarn, Covering.


Automatic Twist Tester is used for accurate measurement of TPM (Twist per meter) or TPI (Twist per inch) of the twisted yarn. 


Automatic Twist Tester manufactured at B-Tex Engineering is as per customer’s requirement that is user-friendly and reasonable. It has been designed specially to meet the growing demand of the textile industry for an accurate instrument to measure the twist in the twisted yarn. The instrument has facility of both untwist/twist methods for measurement of TPM of twisted yarn. 


Features of Automatic Twist Tester:

Micro-controller based electronic twist tester.

Motor driven fully automatic instrument.

Auto stop facility for motor.

In-built sensor.

Alphanumeric backlit LED display unit.

Keyboard with 16 soft touch keys.



Specifications of Automatic Twist Tester:


Yarn test length: 25mm to 500 mm adjustable (metric unit). 

The test length added in scale format will provide final reading in TPM.

Range: 300 to 4000 TPM.

Resolution: 1 TPM.

Elongation Range: 40 mm.

With tolerance of -15mm or 0.6 inch for movement in other direction.

Motor Speed: Up to 500 

RPM : Manual control of rotation is possible by button and hand.

Clamps: Spring loaded clamps at motor end for easy clamping of yarn.

Toggle clamp at spool end for easy, quick and continuous clamping of yarn through spool.

Averaging: Reading of all samples can be stored and average TPM/TPI value is calculated through computer analysis software and cable @ additional 6000/- rs...

Supply: 230 V AC, 30 Watts.

Size: 1000mm x 150mm x 200mm (approx).

Suitable for S/Z type of twisted yarns.

Electronic sensor for sensing zero (starting) position.

Tension weight up to 20 gms adjustable in step of 5 gms.

Yarn spool mounting arrangement at one end of the twist tester.

*Technical specifications & appearance of machines are subject to change without any notice.


How Automatic Twist Tester Works?


The first step is to select the manual or auto mode to be chosen. 

The yarn has to be clamped between 2 clamps.

‘S’ or ‘Z’ key has to be selected depending upon twist direction.

The stopper at the left front side of the Automatic Twist Tester has to be set at approx 50% of expected elongation.

The motor has to be started by pressing the ‘START’ key.

The motor will start untwisting the yarn and LED display will start counting.

Reading will be stored in connected computer automatically in specific serial number.



There are other methods also available, in addition to it, which can be used to conduct test with the help of Automatic Twist Testing Machine.


Automatic Twist Tester confirms with international standards and comes under warranty. All this help provide customer satisfaction that promotes long term customer relationship which is our ultimate objective at B-Tex Engineering. 



Minimum 10 years part availability assurance from the date of Invoice.  


Below are the 

Crimp Rigidity Tester and

Yarn Appearance Board Winder

Yarn Appearance Board Winder

Yarn Appearance Board Winder, Yarn Evenness Tester is used for wrapping the yarn in equally spaced parallel wraps over a board for visual examination. 


B-Tex Engineering brings to you precision engineered high quality instrument at best available price.Yarn Appearance Board Winder is used to compare the appearance of irregularities against standard rating photographs which carry out visual determination of unevenness along the length of a yarn. Tenable yarns of different thickness to be assessed; the spacing between the wraps is suitably selected so as to clearly give a distinguishable pattern.


Features of Yarn Appearance Board Winder, Yarn Evenness Tester:

  • Manually operated.
  • Checks the evenness & appearance of yarn.
  • Precise preparation for accurate assessment of imperfection to grade the yarn against photographic comparison standards.
  • Is used for winding the yarn on the blackboard for visual examination and grading the yarn as per ASTM standards.
  • Choices of wide range of rectangular and tapered boards.


Specifications of Yarn Appearance Board Winder, Yarn Evenness Tester:
Over all Dimension of the Unit: 61 (W) cm x 35 (D) cm x 27.5 (H) cm.
Size of Tapered Board   : 28.5cm x 18 cm.
Size of Rectangular Board: 28.5cm x 18 cm
Standard Yarn Spacing: 20, 22, 26, 32, 38, and 48 WRAPS per INCH
Net Weight of the Unit: 21 kg
Technical specifications & appearance of machines are subject to change without any notice.


Yarn Appearance Board Winder, Yarn Evenness Tester confirms with the following international standards: ASTM D 2255-96


How Yarn Appearance Board Winder, Yarn Evenness Tester Works? 


Wrapping Boards:

  • Yarn number of the yarn to be tested has to be determined. The appropriate spacing of the yarn wraps on the boards has to be found from the table.
  • A parallel/tapered board has to be fixed onto the short stubs.
  • The spacing of the yarn on the board has to be checked by making a small sample wrapping on it.
  • The moving block has to be raised. It is taken to the right side and released. The yarn guide fixed on this block has to be in alignment with the point from where the winding will start. To ensure this, a red mark is present on the guide road.
  • The bobbin containing the yarn to be tested has to be placed on the stand. The yarn has to be passed through the tensioning device and the eyes on the front bracket and moving block.
  • The tension on the yarns has to be adjusted so that it moves freely onto the board as it is rotated. Wrap the yarn over the board till a sufficiently wide band is formed.
  • Cut off the yarn and remove the board from the apparatus.

    Evaluation:

  • Evaluating the evenness rating of the yarn by comparing the board against the master photographs of the same spacing. The standard has 4 master photographs: A, B, C, and D in each spacing.
  • Comparing the specimen with the different ASTM Cotton Yarn Appearance Standards.
  • Assigning to the specimen the grade designated for the photograph for which it is equal to or better than, without being equal to the next higher grade.

Yarn Appearance Board Winder, Yarn Evenness Tester confirms with international standards and comes under warranty. All this help provide customer satisfaction that promotes long term customer relationship which is our ultimate objective at B-Tex Engineering. 


Minimum 10 years part availability assurance from the date of Invoice.  

Crimp Rigidity Tester

Crimp Rigidity Tester is used to determine the bulking potential of texturized yarns.


Crimp is an important property that determines processing behavior in carding, drafting and fault incidences in yarn. Crimp frequency, amplitude, crimp stability, crimp elongation, decrimping point are some of the important properties that determine crimp.
Crimp Rigidity Tester can be used for both polyamide and polyester texturized yarns. Crimp frequency and amplitude may be determined by projecting a magnified image of fibre on screen. Equipment at B-Tex Engineering is manufactured using high quality and high grade raw materials, and is tested for quality assurance before delivery. Moreover, all testing instruments manufactured by us are covered by warranty.Tension device is used in equipment to provide proper tension between two clamps.  The vital role of this tester is to check the Crimp Rigidity of yarn.


Feature of Crimp Rigidity Tester

  •  The instrument is based on test method.
  • The tester can be used for both polyamide and polyester texturized yarns.
  • Instrument mounted on a sturdy metal base. Compact and portable.
  • Heating arrangement for measurement of hot Crimp contraction.

Specifications of Crimp Rigidity Tester


Swift Perimeter         : 1.10 Meter
Number of leas made at a time: 1
Counter (Mechanical Five Digits Reset able): Connected with Geared Motor
Overall Dimensions of the Unit    : 550±5 (L), 220±5 (W), 495±5mm (H)
Net Weight of the Unit   : 7.300 Kg.
Overall Dimensions of the Glass : ID 102±0.5 mm, OD 116.3±0.5mm
Net Weight of the Glass: 3.230 Kg.
Cone Stand : 750 ± 5mm (H).Geared Motor (12v DC) : 25 RPM  


How Crimp Rigidity Tester works?


The principle of this test is as follows: A load equivalent to 0.09 g/dtex is suspended from the end of a yarn immersed in water. After a fixed time the load is reduced to 0.0018 g/dtex and after a further fixed time the reduction in the length of yarn is measured. The crimp rigidity of yarn is the reduction in length of the yarn expressed as a percentage of the original length.
Video Clip : http://youtu.be/nIwTzr2F9Gc


The test method used was as follows:

  1.  Place the package of yarn to be tested on the stud of the base plate of the hank winder in the apparatus below the yarn guide.
  2. Thread the yarn through the gate tensioner and adjust the tension until, on pulling the yarn through the gate; it can be observed that the crimp is getting removed.
  3. Clamp the leading end of the yarn to the inner side of the capstan. Wind a hank of yarn with a number of strands chosen so that loads of 0.09 g/dtex and 0.0018 g/dtex can be applied to each strand by means of the sets of hooked weights provided. (The loads and No. of strands for yarns most commonly encountered are listed in the Table given in BIS Handbook.) Clamp the final strand to the outside of the capstan.
  4. Add appropriate lightweight to the strands extending across the prongs of the fork at the lower end of the arm of the hank winder. Add appropriate heavy weight to the lower hook of the lightweight.
  5. Remove the hank and the suspended weight by unscrewing the hank bar from the arm of the winder.
  6. Attach the extra clip support to the hank bar and immerse the hank in the water contained in the measuring cylinder by clipping the two supports over the rim of the cylinder.
  7. Start the stop watch.
  8. Just prior to 2 min from immersing the hank, measure the length of hank as L0.
  9. At 2 min from the time of immersion remove the heavy weight by raising the grid, causing the weight to be released from S-shaped hook.
  10. After a further 2 min. measure the length of hank as Ls.

 Crimp Rigidity = L0 - Ls / L0 x 100


Minimum 10 years part availability assurance from the date of Invoice.