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Constant Tension Transport with Electronic Servo Drive (CTT-E) is a dynamic test instrument that is available as a mini laboratory for yarns. With its interchangeable test modules, the CTT-E can run more than 10 tests on the same instrument for all natural and synthetic yarns as well as technical yarns such as aramids, carbon, glassfiber and spandex. With this versatility along with its dynamic test principle that will test every section of the yarn, the CTT-E offers the ability to eliminate high cost of running trials on actual production machines before the yarn is sent to the next textile process.


LH-450 CTT-E
  • Electronic Servo Drive and Tension Arm System that maintain 2g-1000g constant input tension at test speeds between 20-1000m/min

  • Offers dynamic test conditions that tests every section of yarn to predict yarn behavior and avoid high cost of running trials on production machines

  • Easy to install test modules that allow measurement from coefficient of friction, entanglement count to yarn appearance on the same instrument

  • Four Tension Arms with different max tension and sensitivity ranges

  • Available with Standard (1000g) and Spandex Range (100g) tension measurement heads

  • Applicable for all types of natural and synthetic yarns, including cotton, polyester, nylon, wool, silk, acrylic, flax, viscose, carpet yarns

  • Functional tests for technical yarns such as aramids, carbon, spandex, glassfiber and monofilament



LH-122 FAK-S

The Lawson Hemphill FAK-Sampler, FAK-S is recognized as the worldwide standard for lab knitting machines. It is a high-speed, precision knitting machine designed to check uniformity and consistency of the yarn quickly and accurately. It is ideal for use in production control and R&D labs as well as dyeing plants.

In any knitting application, the yarn tension and the yarn feed controls are critical to ensure fabric uniformity. Any changes in these variables during knitting will cause irregularities, creating a defective fabric. The FAK-S has a built-in Stitch Control System, which ensures the preparation of the standard samples of knit fabric for yarn quality control purposes. The machine also features a take-up assembly to collect the fabric under controlled tension to further ensure fabric uniformity.

The FAK-S can knit all types of yarns, including synthetic and natural fibers as well as monofilament, filament, elastomeric and spun yarns. Nine different cylinder sizes are available to knit yarns from 10d up to 2000d. All knitting cylinders are interchangeable and can be used with all Lawson Hemphill knitters. (Please consult Lawson Hemphill for knitting higher or lower denier yarns).

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  • Precision lab knitting machine with Stitch Control System to prepare standard samples of knit fabric for quality control purposes

  • Ability to knit all types of yarns, including synthetic and natural fibers as well as monofilament, filament, elastomeric and spun yarns

  • The only sample knitting machine trusted with spectrophotometer for color and dye analysis

  • Maintains constant course length with the Yarn Meterhead to ensure uniform loop size

  • Maintains constant tension on the yarn with the Air Servo/Stitch Cam Regulator to eliminate fabric defects such as barre, which is caused by tension variation during knitting

  • Features fabric take-up assembly to collect the fabric under controlled tension to ensure fabric uniformity

  • Nine different cylinder sizes available to knit yarns from 10d up to 2000d (Please consult us for higher or lower denier ranges.)

  • Interchangeable knitting cylinders that can be used in all Lawson Hemphill knitting machines


LH-604 DFM
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The LH-604 Lawson Hemphill’s Digital Friction Meter is a reliable and economical method for computing yarn coefficient of friction (μ). Windows software has been added which allows the DFM readout to be connected directly to your personal computer or lap top with a complete statistical package. Readout data includes coefficient of friction (μ), COF averages with standard deviation statistics, limits for high and low and one-button transfer of results to Excel or CSV file. Also graph and histogram are provided.

Variations in stitch length relate directly to changes in the coefficients of friction of the yarns being run. High coefficients are now recognized as causing yarn breakage, excessive consumption of yarn and inferior quality. Management can save many dollars and maintain quality standards by reducing stitch length variations by controlling draw tensions.

The LH Digital Friction Meter adds another dimension of versatility to the measurement of yarn friction. In addition to being able to be stand-mounted for quality control functions and laboratory use. It is direct reading, easy to use, accurate and reasonably priced. It has been engineered to be as rugged and versatile as possiblw without sacrificing precision and sensitivity. With proper care, this instrument should remain accurate for many years.

  • Ability to delete undesirable tests.

  • Ability to arrange only rejected packages results.

  • Graph and histogram adjustable scale or automatic mode.

  • Ability to pre-select length of yarn to run before the test starts,in order to get equilibrium to the new package.

  • One-step zero calibration.

  • Printout of test results.

  • Ability to give alphanumeric identification number to each package tested.

  • Work with laptop or desktop.

  • USB connection to computer.

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