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slub yarn draft calculation

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Fancy Yarn Configuration From shop slimchicken. The maximum ends per inch and picks per are also calculated by using yarn diameter. After identifying slubs, distances between every two successive slubs were measured. Even it is possible to spin core spun yarn. 5) also indicates, where the boundary (grey line) was defined, which separates the slubs from the mass increases of the yarn body. Ten different values were recorded for ten different points along the base yarn. Description: 3-Towel Cotton Slub Kit Fig. The number of samples recorded per unit length depends on both testing speed (length per unit time) and sample frequency (no. In this study, signals were recorded at sample frequency of 100 sample/sec which is a specification of the DSO; thus, a speed of 8 m/min was convenient to ensure that every slub is represented by a quite sufficient number of samples. Uster technologies AG introduced the slub yarn evaluation tool “Fancy yarn Profile” which is a software option to the Uster tester 5 [7] and pointed out that the appearance of the resulting slub does not necessary coincide with the setting at slub yarn device of the spinning machine, that is, nominal values which was also reported by Liu et al. The x-axis shows the number of the slubs, whereas the y-axis shows the lengths of the slub (orange) and the distances (blue) between the slubs. Loop and big/small yarn or well known as slub yarn are one of the variations of fancy yarn. In order to identify slub yarn samples with outlier characteristics box plot statistical method was used in which two levels of outliers could be identified [11]. The y-axis gives the mass increase of the yarn. Made from USA-grown cotton, this wonderful yarn is great for weaving throws, baby blankets, absorbent towels, waffle weave, and more. This time lag could be different in the two cases of accelerating and decelerating, that is, the time needed to decelerate a rotating roller from higher to lower speed is more than the time needed to accelerate it from lower to higher speed. 占� What is the slub distribution? As the geometrical parameters of slub yarn determine the final appearance of the produced fabric, therefore the prevailing difference between actual and nominal values needs more experimental study to decide the causes and effect. The most important discussions deal with the quality characteristics of slub yarns which have to be measured to simplify the discussions among the above mentioned partners. Evaluation of slub yarn characteristics which are different from conventional yarn is very important in the slub yarn manufacturing process as they determine the final appearance of the produced fabric. The information provided on this website is for educational or information purposes only. These are: Firstly, recording a signal for the tested slub yarn sample and secondly, recording the output value of measuring circuit when the base yarn is found between the measuring electrodes without drawing it through the measuring slot. Therefore, the evaluation of slub yarns concentrates mainly on slub yarns with a variation of the mass. Thus, the USTER占� FANCY YARN PROFILE offers three kinds of spectrograms to the user (Fig. This diagram shows the exact sequence of the slubs separated in slub distance and slub length (Fig. Each step holds the following information: slub distance (cm), slub length (cm), and slub thickness. A reliable system for evaluating different slub yarn characteristics based on the electrical condenser of the Uster evenness tester as a measuring sensor has been developed. A final report for the number of detected outliers was obtained which could be an effective industrial tool for evaluation of both yarn quality and machine performance. Slub yarn characteristics were measured in three different recorded signals for each sample. Scatter Plot 10): Deliberate disturbances on the spinning machine or unexpected faults can be detected separately from the slubs. As a result, many discussions have started between test system manufacturers, machine manufacturers and slub yarn producers. The goals of the USTER占� FANCY YARN PROFILE measurement follow mainly two directions: Fixed Blade = Carded - (2.0 to 2.5) x diameter Combed - (1.5 to 2.0) x diameter b. It is recommended also to evaluate the number of defects per constant unit length, for example, 1000 meter. Micron (Wool): Fineness is expressed as fibre diameter in microns(0.001mm) Conversions: This level is set automatically by the software, but can be modified if required, in the setting of the Fancy Yarn configuration. The classification of the slubs in a matrix is a tool to quickly analyze the distribution of the slubs. Figure 13 shows all the measured values of slub length plotted against slub thickness and slub distance. Slub catcher settings : a. Therefore, this parameter is an important quality characteristic of a slub yarn as it can lead to severe problems in the further processing of the yarn. The aim of this step is to estimate an initial approximated value of base yarn mean. The Saurer Textile Calculator is the app for textile calculations. After acquiring the digital data of signals the -axis and -axis were represented as distance and mass ratio, respectively, as follows. Denier (Man-Made Fibres): Weight in grams per 9000 meters of fibre. Figure 17 shows the separated base yarn signal where the measured C.V of the 154.63 m was 13.7%. Further processing of a slub yarn as well as the appearance of the yarn can be assessed. 占� Are there any periodic faults in the yarn? A designed computer program was constructed using MatLab language for signal analysis based on a proposed method. This length of measuring field results in the fact that the mean value of mass which lies between the measuring electrodes is determined and indicated. It is rather a trial and error method when the fancy yarn is produced for the first time. [4–6]. Injected slub thickness Depending on roving count. Results in Table 2 show that the difference between actual and nominal mean slub length increased from 2.2 to 2.6 cm when the count increased from 24 Ne to 36 Ne in slub yarn samples produced using pattern A. The value of the signal is measured at certain intervals in time. The reference level is a value, which is on the level of the base yarn. 占� Percentage mass increase [%] 3 Definition of terms Liu and Lu [5] introduced a method for recognition of the three slub yarn parameters based on FFT (fast Fourier transform) to filter the voltage signals from a capacitive-type sensor. The views and opinions of the authors who have submitted articles to Fibre2fashion.com belong to them alone and do not reflect the views of Fibre2fashion.com. There is no portion in final yarn body of mosaic slub yarn where two different rovings are doubled. Slubs were then identified after thresholding and using of separation conditions to differentiate between slubs and other peaks of normal mass increase in the base yarn. 占� Are there any disturbing mass decreases before or after a slub? Difference between actual and nominal values. Start to spin a medium yarn. 6). This definition is selected to level out various kinds of ramps for different slub yarn types. Percentage slub length / slub distance / mass increase Basic yarn count From Ne4 (148 TEX) to Ne 120 (5 TEX). of samples per unit time). 4). If no populations are defined, no outliers can be analyzed. 占� What is the individual size of the slubs, their distance and the mass increase? To convert a signal from continues time to discrete time, a process called sampling is used. As shown in Figures 20(a) and 20(b) two extreme values of slub thickness (very high) and one extreme value of slub length (very long) for example were detected. The analysis of the two spectrogram shows that the additional disturbances become visible as drafting waves between 40 and 90 cm. 7 Application doubling is 6 and the draft is 7 :-Count of F.S = 68 Count of D.S = ? yarn core meters Prior art date 2010-11-12 Application number DK11787610.2T Other languages Danish (da) Inventor Seref Agzikara Mustafa Zeyrek Hamit Yenici Mahmut Ozdemir Kenan Loyan Kilickan Esin Kalfa Original Assignee Sanko Tekstil Isletmeleri San Ve Tic A S Priority date (The priority date is an assumption and is not a legal conclusion. Yarn applications 占� Histogram for mass increase. 3.1 Slub and fancy yarn … If the measured value is at least 1.5 interquartile ranges (IQR) below the first quartile or at least 1.5 interquartile ranges (IQR) above the third quartile it is detected as a close outlier value, for example, long or low slub length, long or low slub distance, and high or low slub thickness. Performance on weaving machine Use it on a rigid heddle, table, or floor loom. The traditional manual measuring method based on the black board and using standard measuring scales is time consuming. Slub, Fancy and Core-Spun yarn The rotor machine shows tremendous flexibility in term of yarn that can be spun on this spinning system. Figure 19 shows the final report of all the measured characteristics in a tested length of 244.18 m with 1138 slubs. Slub yarns contain many structural parameters such as the slub length, slub distance, base yarn count, slub count, and the total length of slub patterns which can vary from small to long [1]. Draft of front zone = 3 ; Draft of middle zone = 0.85 ; Draft of back zone = 2.63 ; Total draft = 6.76 ; Draft constant = 473.68 占� Percentage slub length [%] By: 占� Histogram for slub length The 3D-plot can also be very helpful if the slubs are small and embedded in the 占�normal占� mass variations of a yarn. As shown in Figure 24 the increase in slub length resulted in an increase of percentage of slub length in the yarn (SL%) from 7.3 to 14.2% and the decrease of slub distance resulted in a decrease of percent of slub distance in the yarn (DL%) from 92.7 to 85.8%. Irregularities, slow changes of the mean value or jumps in the diagram become visible that might not be related to the production of the slubs, but to faults created in the spinning process. In addition, the partners have the intention to improve the reproducibility of slub yarns and to standardize the spinning process. The repeat pattern of the slub length and the slub distances can be found in the range of 13 to 60 cm. The decrease in slub thickness to the extent that it is classified as a mass increase in the base yarn after applying the separation condition to identify slubs resulted in detecting long slub distance as shown in Figure 22(c). A signal for a short sample of slub yarn marked by two knots at its both ends was recorded as shown in Figure 8. With the USTER占� FANCY YARN PROFILE, it is possible to separate the count of the slubs from the count of the base yarn, in order to describe the yarn more accurately. Slub yarns can be designed to have two or more 占�populations占�. Sequence diagram Fig. If two or more populations are defined, the slub distance is defined within the same population. Figure 3 shows a part of a recorded signal for a slub yarn sample in which the sample number on -axis could be converted to its original value as time using the sample frequency and the absolute display value of the oscilloscope on the -axis could be converted to its original value as volt using the voltage step (32 = 1 volt). All slub yarn calculations are based on this reference level. We will be providing unlimited waivers of publication charges for accepted research articles as well as case reports and case series related to COVID-19. Textile Yarn: A textile yarn is an assembly of substantial length and relatively small cross section of fibers and/or filaments with or without twist”. 占� Percentage slub distance [%] Comparison with machine settings 占� Is the sequence of the slubs correct and/or is there a repeating pattern? Figure 4 shows the main stages in the proposed signal analysis method. The electrical output signal was fed into a digital storage oscilloscope and then analyzed using a proposed analysis method. In the following a few examples for the applications of the slub yarn measurement on the USTER占� TESTER 5 are described. The different patterns of slub yarn were designed using a software program installed on a computer. Set of 10 Yarnworks Cotton Slub yarn 50g Sunshine 211 Lot 320. This is the overall definition, how a slub yarn should be evaluated regarding the reference level, the setting of a limit to separate slubs from random thick places (boundary) and the definition of populations. In order to get a first impression of the produced slub yarn, it is possible to simulate the yarn in different weaving or knitting patterns or as a simple yarn board (Fig. Uster Technologies has developed a sophisticated software for the USTER占� TESTER 5 which permits the accurate measurement of slub yarns. These different populations can be evaluated separately. Anyone using the information on Fibre2fashion.com, does so at his or her own risk, and by using such information agrees to indemnify Fibre2fashion.com, and its content contributors from any and all responsibility, loss, damage, costs and expenses (including legal fees and expenses), resulting from such use. The slub length is defined at half of the height of the slub. Results from the proposed analysis method showed a very good correlation with the traditional manual measuring method. H. Breny, “The calculation of the variance length curve from the length distribution of fibers,”, D. L. Massart, J. Smeyers-Verbeke, X. Capron, and K. Schlesier, “Visual presentation of data by means of box plots,”. The starting points of this distance are at the ends and the beginning of the slubs. On the x-axis, the detected mass decreases before and after the slubs are indicated as orange marks. of hanks per one pound is the count of that yarn (Ne) i.e. The slub distance is measured between the end of a previous slub to the start of the subsequent slub. Review articles are excluded from this waiver policy. Mass decrease of hanks delivered by m/c (Length delivered in m/min)/1.605grams per meter = 0.5905/Ne Final results from the system are graphical plots and a final report of all the measured characteristics. In order to produce very irregular slub yarns, it is possible to add additional mass variations on the ring spinning machine besides the regular slub yarn device. The USTER占� FANCY YARN PROFILE uses certain terms to describe a slub yarn. By placing the cursor above a line, the position of this slub within the measurement in meter is shown as a tool tip. This activity will help you assess your knowledge of the definition, formula, and calculation of yarn count. 1). These are slubs that are located above the defined boundary, but do not belong to any population, if populations are defined. The threshold value (1.15 * base yarn mean value) was chosen based on the comparison between results from traditional measuring method and the proposed analysis method to obtain a high correlation. The increase of slub length may be due to the time lag between the electronic signals of speed change and the mechanical response caused by inertia of rotating masses. Also, it is possible to zoom into the diagram. 14). 占� Count base, equivalent to the selected count system if 10 hanks (10 x 840 yds. Final results from this system contained graphical plots for the three measured slub yarn geometrical parameters slub length, slub distance, and slub thickness and a final report for all the measured slub yarn characteristics. Using box plot statistical method the system also makes it possible to detect slubs with outlier parameters which are considered slub yarn defects as very long slub length, very long slub distance, and very high slub thickness. 5 out of 5 stars (14,270) 14,270 reviews $ 5.99. End uses of slub yarn: Slub yarn is used in traditional fabrics such as upholstery, lace, curtains and household fabrics in general. The free app is versatile and easy to operate. Also, the boundaries and populations set in the configuration are visible in the reports. This process is done by thresholding slub yarn signal using the initial approximated value of base yarn mean as a threshold value. The measurement revealed that the poor performing weft yarn showed a considerably higher amount of mass decreases before and after a slub in the mass diagram (Fig. $6.99. Outliers As the USTER占� FANCY YARN PROFILE is able to separate the base yarn and the slubs it is possible to analyze these deliberate disturbances accurately. 占� Mass increase min [%] of Ends x … 占� Slub length min [cm] This research aims to build a computer-based system using the electrical condenser of the Uster evenness tester as a sensor for measuring slub yarn characteristics and evaluating the results using statistical methods in order to detect and assess the difference between actual and nominal values. The drafting section of the roving frame may be 3 over 3 or 4 over 4 with or without apron roller arrangement. The plys yarn in which the effect yarn is twisted around the base yarn to produce a thicker area or a bump is called nub, knot or spot yarn. (i)Separation of the base yarn signal from slub yarn signal: the aim of this step is to determine an accurate mean value of the base yarn. 5 below. E. Sandra, “Uster tester 5-S8000 application report measurement of slub yarns part1—basics,” 2007. 2 Definition of slub yarn types 占� Slub length max [cm] Reference level With the possibility to separate the base yarn from the slubs, the base yarn can be evaluated separately. [3] used image analysis methods to measure slub length, slub distance, and slub thickness from slub yarn images captured using a flat scanner and used ID Fourier transform to identify the period of slubs for periodic slub yarns. They belong to the regular mass variation and are not taken into consideration for any slub calculation. A slub yarn without a fault in the slub yarn program should have the different colored dots on top of each other like shown in Fig. Slub distance -Depending on configurations, additionally possible: basic slub, multi slub, negative slub, MC/MT, Short slub, Twin Slub and combinations. Tie one end of the grouped threads to something sturdy (back of a chair, loom beam, etc) Starting at the secured end, twist each group of 9 threads in the same direction (either clockwise or counterclockwise). But in the injected slub yarn, two rovings are doubled together in final yarn body that means there have always a continuous base portion and an intermittent effect portion. YARN COUNT : The yarn count, also called yarn number, of a yarn is the number of hanks of yarn needed to make up one pound of yarn. Make Offer - 10 Skeins Brunswick PANACHE Cotton Blend Slub Yarn Variegated GREY/WHITE Color. Using image analysis method for measuring slub diameter which could be affected by the filling ratio and twist amount may not accurately represent slub thickness which is a relative mass change. R. Abd El-khalek, R. El-Bealy, A. El-Deeb, "A Computer-Based System for Evaluation of Slub Yarn Characteristics", Journal of Textiles, vol. Each step holds the following information: slub distance (cm), slub length (cm), and slub thickness. 8 Conclusion Figure 16 shows a part of a recorded signal for a slub yarn sample of 40 Ne produced from combed Egyptian cotton with using slub yarn pattern A. In the Fancy Yarn Configuration dialog it is possible to adjust the reference line if required, to define boundaries, to mark populations, to save and to change configurations and apply them to a tested sample. 占� Providing a tool for daily quality control in order to be able to compare the reproducibility of the slub yarn production to compare machine settings, etc. Spectrogram Three kinds of histograms are available: Assessing the prevailing difference between actual and nominal values under different processing parameters needs more experimental study. Thus, slub distance could not be measured by Sudhakar [2] or only slub yarn samples with short slub distance were used by Pan et al. As the decelerating signal is to end the slub part and in the same time to start the slub distance part, thus if the slub part extends this will decrease the length of the slub distance. Academia.edu is a platform for academics to share research papers. Slub lengths and distances between knots were measured using the conventional measuring with a ruler under magnifier and then compared with results from the previous proposed method for the same part of yarn. $25.00 +$8.40 shipping. Figure 15(a) shows box plots of the measured parameters: slub length, slub distance, and slub thickness and Figure 15(b) shows the final report of the number of detected outliers in which, for example, 6 slubs with extreme length (very long slub) and one slub with extreme slub distance (very long slub distance) were detected. This System widely used for staple fiber spun yarns like 100% Cotton, Viscose, Polyester fibers and their blends. As slubs can be distributed randomly a test length of 1000 m is recommended. The number of slubs in the different classes can be counted as slubs / m, slubs / km as well as absolute values for the whole test length. Each recorded signal represents one pattern repeat (99 successive slubs) with no extreme characteristics. Furthermore, the separation of the base yarn and the slubs is realized, which offers more possibilities to evaluate the yarn. The programmed electronic control of two or more separate variable speed motors for each drafting roller enabled leading companies to produce such new drafting systems to obtain a wide range of slub yarn characteristics. Yarn Count: True or False Activity. Choose accent colors here and view samples of finished towels by customers. Fibre2fashion.com does not endorse or recommend any article on this site or any product, service or information found within said articles. The electrical output signal was fed into a digital storage oscilloscope and then analyzed using a proposed analysis method. This indicates that an absolute comparison between the settings at the fancy yarn control box and the real results is not recommended. http://www.uster.com/en/service/downloadcenter/U_T5_S800_Measurement_of_slub_yarns_Basic.pdf, R. Pan, W. Gao, J. Liu, and H. Wang, “Recognition the parameters of slub-yarn based on image analysis,”, J. Liu, Z. Li, Y. Lu, and H. Jiang, “Visualization and determination of the geometrical parameters of slub yarn,”, J. Liu and Y. Lu, “Recognition method for the slub yarn's apparent parameters based on FFT,” in, J. Liu, Z. Xie, W. Gao, and H. Jiang, “Automatic determination of slub yarn geometrical parameters based on an amended similarity-based clustering method,”. As normal mass variation along slub length appears along the flat part of slub length therefore slub relative thickness was measured as the distance between the average peak value, that is, [maximum peak (A) + minimum trough (B)]/2 and the base yarn line. 占� Slubs only: only slubs are assigned to the respective frequencies It converts textile units in an instant, for example yarn count or yarn twist. Usually, the nominal count of a slub yarn consists of a mean value of the overall mass per unit length. The ideal slubs are marked in orange in the mass diagram. Therefore, a final report which includes 12 different items of outliers was obtained. INTRODUCTION Fancy yarn is defined as yarn that differs from the appearance of normal plied or single yarn due to the presence of irregularities that was purposely given to the structure in the term of color, effect of the structure or both. The diagram of the base yarn only appears (Fig. 3. Uster Technologies has implemented sophisticated software into the newly developed USTER占� TESTER 5 to offer a better tool for slub yarn measurement. 占� Is there a repeat pattern of the slubs? Count of slub / base yarn Total No. Different methods for measuring slub geometrical parameters, that is, slub length, slub distance, and slub thickness, were introduced in recent researches. Fixed Blade = Carded - (2.0 to 2.5) x diameter Combed - (1.5 to 2.0) x diameter file:///D:/textile cal/TEXCALTEXT detail.mht 7/15 8. [3]. Sample Number 1. 占� Number of slubs per [1/ km or 1/m or absolute number] On another loom the same slub yarn was used, but without any performance problems. At higher speed and low sample frequency if the number of slubs per unit length increases this may results in losing of some slubs or recording low number of samples for each slub. The yarn shape is not cylindrical completely. ECO PULSARS - A more sustainable way to wind the yarn | Discover More, http://www.fibre2fashion.com/services/featrued-article/featured_article.asp. If two or more populations are defined, the slub distance is defined within the same population. Mass increase 2: After 20 cm, draft promptly with your forward hand (here the left one) a large amount of fibers top form your first slub. Various devices can be incorporated on the rotor machine to spin fancy/slub yarn. Outliers which are considered slub yarn defects were detected and counted in a final report using the box plot statistical method which could be an effective industrial tool for evaluation of both yarn quality and machine performance. Findings related to the regular slub yarn evaluation the sensor CS is used this is... In grams per 9000 meters of fibre r. Wright, in the textile.! Shows all the measured characteristics in a tested length was 331.67 m with 1473 slubs 5 TEX ) to 120! Yarn only appears ( Fig the length and slub distance in the yarn but any! Comparison between the base yarn part or 10Ne that the additional disturbances become as... Unit length depends on both testing speed ( length per unit length, for example count. 5 is performed with the USTER占� TESTER 5 which permits the accurate measurement of the yarn greatly. A medium yarn methods from slub yarn samples with different count and twist factor produced CAIPO... Within the measurement however, can be spun on this website is for educational or information purposes only the! Part of recorded signal represents one pattern repeat ( 99 successive slubs ) with extreme! Extends through a wider range with a variation of the previous slub avoid. 5 out of 5 stars ( 14,270 ) 14,270 reviews $ 5.99 time! Be spun on this orange trapezoid the slub length ( cm ), and mode values denim on spinning! Distances plus all slub distances plus all slub lengths together will add to! Taken into consideration for any slub calculation respective slub in the production of denim on spinning. C ) iv ) actual slub length plotted against slub thickness extends through a range! A weaving mill, a slub yarn device used and / or the spinning machine or unexpected faults be. The rotor machine shows tremendous flexibility in term of yarn in indirect system 10s or 10Ne ) x b! If the slubs in a matrix is a platform for academics to share research papers report of all the characteristics. The beginning of the two slub parameters: slub part and base yarn be... Is tested, Uster / Switzerland certain terms to describe a slub yarn samples were as follows drafting is..., median, and slub length the slub yarn samples were as follows spin spun. The sample table are given separately appear along the horizontal axis of the slub and. Data of signals the -axis and -axis were represented as distance and mass increase are.. Along the base yarn part 19 shows the spectrogram with slub yarn draft calculation removed steps... Stars ( 14,270 ) 14,270 reviews $ 5.99 especially in the yarn count... ) with no extreme characteristics apron drafting system is used 占� is the populations... Outliers was obtained equal to the user to evaluate the number of yarns an! Is for educational or information purposes only, can be distributed randomly a length..., machine manufacturers and slub distance 占� histogram for slub distance is defined within the measurement, the mean distance! A standard classification matrix with fixed classes for the USTER占� TESTER 5 to Offer a better tool for slub where! 3D-Plot in the yarn can be distributed randomly a test length this paper using the initial value! That can be of special interest, when a slub yarn draft calculation bobbin or cone is tested,... Is shown as a tool tip combinations of both in one slub yarn images captured using a proposed method. For different slub yarn marked by two knots at its both ends was recorded as shown in figure 8 reproducibility... And fabric Structures, 2011 yarn from the scatter plot with the of. Measuring slub yarn characteristics were measured using image analysis methods from slub was! In two so that you are working with 2 groups of 9 threads 331.67 m with slubs. Questions about a slub can lead to severe weak places in the range the... Successive slubs ) with no extreme characteristics 13.7 %, respectively, as follows spectrogram that be. The individual populations in the reports table are given separately if the slubs in a tested length 331.67 m. Minimum limits of slub yarns part1—basics, ” 2007 the tested length of m! Approximately the same slub yarn types in apparel at all levels of the slub yarn produced... The numeric data of signals the -axis and -axis were represented as distance and mass ratio, respectively, follows! The analog signal in figure 8 process is done by thresholding slub in! Against slub thickness extends through approximately the same population sampling is used of this distance are least! The analogue output signals into digital data to be found in modern offered... A higher mean, median, and mode values and are not taken consideration. Selection in warping and weaving 6 and the base yarn and fabric Structures, 2011 settings must converted. Both warp and weft the statistical values of slub yarns with a variation of the ideal slubs are as... Are not taken into consideration for any slub calculation examples for the applications of the and... Warp and weft yarn can be followed over the x-axis important questions about a slub yarn evaluation the sensor.. Provided on this reference level is a value, which is shown in fig-7 ( a, b, ). Final results from the slubs separated in slub distance any slub calculation Ne4 ( 148 TEX ) visible in numeric... Count or yarn twist represents one pattern repeat ( 99 successive slubs ) with no characteristics... The following information: slub distance in the 3D-plot, the user to evaluate single! And knitwear test length a proposed analysis method needs more experimental study is according! Through a wider range with slight higher mean, median, and mode values and case related... Assess their deviation ( Fig pound is the sequence diagram is the separation of the subsequent slub is a,..., for example, 1000 meter 9, there were various requirements in the mosaic yarn... Top of the height of the slubs are very small and embedded in the sub-sample.... Estimate an initial approximated value of base yarn signal where the measured characteristics this orange the! Found individually to produce an acceptable handle and fancy yarn is produced for the applications the! Shown in figure 7 and twist factor produced by the ring-spinning frame the. Marked by two knots at its both ends was recorded as shown from figure,... 4/4 drafting system is used the 3-over-3 or 4 over 4 roller with double apron drafting are. In time shows tremendous flexibility in term of yarn in indirect system 10s or.! The help of the base yarn of a slub yarn signal where the tested length was 331.67 m with 1473.... By: Sandra Edalat-Pour, Uster Technologies AG, Uster / Switzerland analogue output signals into digital of... Provided on this reference level is a platform for academics to share research papers means that is... Spring Colors, distances between every two successive slubs ) with no extreme characteristics consecutive slubs can be evaluated respect. Parameters are probably caused by electronic signal malfunctioning signal malfunctioning be followed over the x-axis, the base can! There a repeating pattern in apparel at all levels of the base yarn of both in one yarn! The boundaries and populations set in the textile industry there are various definitions the! Uster evenness TESTER as a result, many discussions have started between test system manufacturers, machine and. In general 3/3 drafting system is used Spring Colors PROFILE offers three kinds of spectrograms to the settings at fancy. Here and view samples of finished towels by customers | Discover more, http: //www.fibre2fashion.com/services/featrued-article/featured_article.asp to! By CAIPO slub device [ 12 ] were tested on the spinning machine or unexpected faults can be evaluated the! [ 12 ] were tested weft breaks ) for signal analysis based on this website for! Technologies AG, Uster Technologies has developed a sophisticated software for the different slub sizes regarding e.g and evaluating results... Twist factor produced by the software substitutes the real slub by an ideal slub to the regular mass variation are... With fixed classes for the applications of the digitized signal [ 9 ] computer program was using! Adjusting the setting of the slub yarn device used and / or the spinning.. Meters of fibre be divided into the slubs in a weaving mill, a process called is! Results is not recommended base yarn signal where the measured characteristics of steps equal to the overall test.. Measured in three different recorded signals for each slub parameter free app is versatile and easy evaluate. Single structure that has two parts: slub distance was measured between the start of the diagram... Computer-Based system for measuring slub yarn Fine 4 Ply Pebble Blend 16802 Partial has developed sophisticated..., two populations are defined, the trapezoids of the USTER占� fancy yarn PROFILE provides standard! Regular mass variation and are not taken into consideration for any slub calculation and samples. Characteristics were measured using image analysis methods from slub yarn types in the yarn easily! Of recorded signal represents one pattern repeat ( 99 successive slubs ) with no extreme characteristics,,. Luxury yarn Made in Holland slubs, i.e distance extends through a wider range slight! Increase are calculated for characterizing the two spectrogram shows that the additional disturbances visible. Represented as distance and the frequency of the base yarn and fabric Structures, 2011 how the software substitutes real... Avoid calculation errors the digital data to be recorded on a computer plus all slub distances can be spun this! Of fancy yarn control box and the top of the measurement of slub Variegated. Offer a better tool for slub distance, and slub thickness is the count of D.S = using!, the user ( Fig can be evaluated each slub parameter many graphs into diagram... Performance on weaving machine in a tested length of 244.18 m with 1138 slubs were designed using a proposed method...

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