Correlation of yarn tension with parameters in the knitting process

Koo, Young Seok

doi:10.1007/bf02875404

Cited by 13 publications

(6 citation statements)

References 9 publications

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“…Therefore, it is important to develop sensor to measure and control yarn tension. Since the yarn tension is fluctuating continuously and there are many perturbations in the yarn mill [3], such as electromagnetic, electronic noise, mass variation, vibration disturbance noises, and variation of temperature, the yarn tension sensor should have high sensitivity, high precision, high stability, and fast response [4].…”

Section: Introductionmentioning

confidence: 99%

Compensated SAW Yarn Tension Sensor

Lü

Chen

2014

IEEE Trans. Instrum. Meas.

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The measurement and control of yarn tension is important in textile technology. This paper presents a two channel architecture surface acoustic wave yarn tension sensor, which is able to provide a sensitivity about two times bigger than the previous one. The design and the fabrication of the devices are also presented. A mathematical analysis shows that the output frequency of the sensor varies linearly with the yarn tension. To test the performance of the sensor, an experiment is carried out to obtain the output frequencies in different yarn tension. The results show that the sensor has a sensitivity of 8234 Hz/N (80.75 Hz/gf), and the sensor is capable of measuring a range of 0-0.196 N (20 gf) yarn tension with a relative error of 2% and a hysteresis error of 3%.Index Terms-Surface acoustic wave (SAW), yarn tension sensor.

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Section: Introductionmentioning

confidence: 99%

Compensated SAW Yarn Tension Sensor

Lü

Chen

2014

IEEE Trans. Instrum. Meas.

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“…The decrease of the yarn tensile force value refers back to yarn elongation, because there is a greater amount of yarn in the section that has to be elongated before the tensile force increases, as discussed by Matthes et al 30 Hence, the reason why lower yarn tension did not cause the needle to bounce may be the high elongation property of the textured polyester yarn. Koo 2 suggested that an increase in the friction between the yarn and needle hook is produced by high tension and, hence, such a needle did not follow the cam thoroughly due to the high tension between the hook and the yarn. Also the literature on the mechanics of single jersey loop formation revealed that the phenomenon of robbing back plays an important role in determining loop length and, in particular, yarn input tension strongly affects robbing back, although it occurs even at zero input tension.…”

Section: Textured Polyester Yarnmentioning

confidence: 99%

“…However, it has been realized that it is impossible to increase the production speed infinitely without considering the textile materials used on the machines due to the materialrelated problems occurring in the production. 2 Increasing the speeds of weft knitting machines will consequently enlarge the reaction forces between knitting elements and then cause their attrition. 3 Also yarn tension is a key parameter on the force between knitting elements.…”

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confidence: 99%

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Effect of yarn, machine and knitting process parameters on the dynamics of the circular knitting needle

Duru

Candan

Muğan

2014

Textile Research Journal

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Stitch formation during the knitting process is dependent on the dynamic movements of needles. The movement of the needle is subjected to many different factors during loop formation, such as machine, yarn and knitting process parameters. In particular, machine speed, yarn tension and fiber type are the vital parameters of needle movement. This study was conducted in order to investigate the effect of these parameters on needle dynamics during one knitting cycle. Highspeed camera technology was used for the first time to collect data regarding needle movement on a circular knitting machine of E 24 and 30'' in diameter. The results showed that the needle displacement in both x and y coordination did tend to increase as the yarn tension increased. For all situations, the elastane yarn was an influential parameter on the needle displacement, although the change in its input tension was not a significant parameter. It was also found that during the production with 100% ring cotton, there was a tendency for the needle to follow the cam path when the machine speed was increased from 15 to 20 rpm. Finally, the data obtained for knitting with the textured polyester yarn showed that the needle movement was highly dependent on yarn input tension.

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“…: +82-51-510-2843; Fax. : +82-51-583-5975; e-mail: youngskoo@pusan.ac.kr ideal condition for the accumulation of fly and other impurities 4) .…”

Section: Introductionmentioning

confidence: 99%

Effect of Yarn Characteristics on the Needle Contamination during Knitting Process

Koo¹

2010

Textile Coloration and Finishing

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Needle contamination was investigated using a test rig simulated the knitting points in the knitting machine in relation with the characteristics of knitting yarn such as yarn type and moisture contents. When used open-end yarn compared with combed and carded ring-spun yarns, the needle contamination was significantly increased because of the higher friction between yarn and needle by the fly and other impurities. Also Lower moisture content of the yarns aggravated the needle contamination. In addition knitting yarn breakage was substantially influenced by the higher needle contamination.

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Correlation of yarn tension with parameters in the knitting process

Cited by 13 publications

References 9 publications

Compensated SAW Yarn Tension Sensor

Compensated SAW Yarn Tension Sensor

Effect of yarn, machine and knitting process parameters on the dynamics of the circular knitting needle

Effect of Yarn Characteristics on the Needle Contamination during Knitting Process

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