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VARIOspin fancy yarn device With innovation to fashion

Ring spinning machines

2 Rieter . VARIOspin fancy yarn device

VARIOspin fancy yarnINTRODUCTION

RIETER‘S INNOVATIVE SOLUTION FOR PRODUCING FANCY YARNSThe fashion world is changing faster and faster. Today‘s fashion-able yarns are obsolete after a short time as new fashion trends emerge. There is an increasing tendency to use fancy yarns for fashionable eff ects.

Rieter has developed an innovative solution for producing fancy yarns on Ring Spinning and ComforSpin machines. This inte-grated fancy yarn option is called “VARIOspin”. The associated programming tool for individual creation of fancy yarn patterns is called “VARIOspinDATA”.

MARKET SHARES OF THE DIFFERENT EFFECT TYPES

Multi-count <15%

Multi-eff ect <5%

Multi-twist <5%

Slub yarn∼75%

EFFECT TYPES

VARIOspin – 4 different possibilities to create effect yarns

Eff ect yarn without twist adaptation

Eff ect yarn with twist adaptation

Combination of multi-count and multi-twist yarn

Slub yarn• Multi-count yarnMulti-twist yarn

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Multi-eff ect yarn•


RIETER‘S FANCY YARN DEVICE – VARIOspinThe VARIOspin fancy yarn device off ers the following features:

VARIOspin is an integrated solution covering a variety of fancy yarn requirements.VARIOspin works with the FLEXIdraft drive system, which has been optimized for the acceleration and deceleration requirements for spinning fancy yarn. The drafting system motors and transmissions are identical to those of the standard ring spinning machine.Applicable to Rieter Ring Spinning and ComforSpin machines delivered after May 2004.VARIOspin is available as an option and can be retrofi tted in the machine and control system in an economical way.The change between fancy yarn and standard yarn is made quickly and easily at the operator panel via the machine control system. 100% reproducibility of the eff ects.No thin places before and after the eff ects thanks to special Rieter software.Wide variety of fancy yarn pattern options.Easy programming of the eff ect pattern by means of VARIOspinDATA.Predefi ned patterns are accessible via PC.

RIETER‘S FANCY YARN SOFTWARE – VARIOspinDATAEffi cient programming and management of eff ect pattern by using the VARIOspinDATA software tool.

Offl ine design and simulation of fancy yarn patterns.Easy copying of pattern repeats.The program has a capacity of 700 steps per pattern and 3 diff erent eff ect sizes (mass increase) per article. Eff ect simulation of - blackboard for yarn characteristics - woven fabric for weft characteristicsStorage of the pattern repeats on the PC and up to 20 fancy yarn articles in the machine control.VARIOspinDATA converts the eff ect data into machine data.Data are transferred to the spinning machine via a standard interface.

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VARIOspin summaryFEATURES


Based on proven basic machineMACHINE PREREQUISITES

The proven basic machine concept together with many years of technological experience result in an integrated fancy yarn solution.

Ri-Q-Bridge – in combination with the P3-1 pneumatic pressure arm for top-class yarn qualityRi-Q-Draft – drafting system with pneumatic pressure arm for centralized loading and reliefFLEXIdraft – push button setting of main draft and yarn twist – no gear changesFLEXIstart – start-up and spin-off by quarters at the push of a buttonMEMOset – data storage for 18 yarn articles SERVOgrip – doffi ng without underwinding reserveISM – Individual Spindle MonitoringINTERcool – lower air-conditioning costs due to integrated cooling system for all motors and frequency convertersROBOdoff – maximum doffi ng reliability; doffi ng time < 2 minSERVOdisc – maintenance-free cop transport system, open rail systemROBOload – fl exible and effi cient handling of cop transport system, open rail systemSERVOtrail – manual or automatic package transport system

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Rieter panel ROBOdoff

SERVOgrip ISM


NO THIN PLACES BEFORE AND AFTER THE EFFECTSOne of the common problems of fancy yarns are thin places before and after the eff ect. Thin places are the result of twist relaxation in the yarn. Technological theory claims that twist always goes fi rst to thin places. When slub or multi-count yarns are being produced, a thick place follows a thin place and the twist will consequently go to the thin place, which makes it appear thinner than it actually is. With the Rieter software, critical thin places before and after the eff ects are eliminated.

What you program is what you getHIGH SYSTEM ACCURACY

FANCY YARN – 100% REPRODUCIBILITYThe Rieter solution for VARIOspin in combination with the proven features of the basic machine drive and control concept ensures that the eff ects in the yarn correspond to the eff ects programmed on the machine. The pattern repeats are 100% reproducible. FLEXIdraft, the modern drafting system drive provides high-precision settings. All three bottom rollers are continuously monitored. All important parameters can be adjusted electronically and precisely with FLEXIdraft – highly economically.

No thin places (Rieter software) – 100% reproducible eff ectsHigh eff ect consistency over the entire length of the machine (CVb) due to FLEXIdraft (all 3 rollers driven from both ends).


A variety of eff ects can be produced on Rieter Ring Spinning machines with the VARIOspin option. Eff ects are created by varying the main draft and/or by varying the delivery speed.

SLUB YARNThe production of slub yarns is the oldest and most common of the 4 possible eff ects (see page 2). The characteristics of slub yarns are thick places created by main draft variations in the drafting system. Slub yarns have the same twist/m or twist/inch in the slubs and in the basic yarn. Consequently the twist multi-plier changes because of mass variation. The mass eff ects are produced by varying the speed of the infeed and middle bottom roller. The speed of the delivery bottom roller is constant. As a rule, slubs tend to be short eff ects.

MULTI-COUNT YARNMulti-count yarn features similar characteristics to slub yarn. As its name implies, diff erent counts can occur in one yarn. That is to say, a basic count is defi ned, relative to which in-creases and decreases in mass can be produced by selective acceleration and deceleration of the drafting system. As is the case with slub yarn, these are produced in an irregular pattern repeat, thus preventing a moiré eff ect in the end product. The twist multiplier in multi-count yarn always remains the same in the base yarn and the eff ect. Therefore, when multi-count yarn

Fancy yarn requirementsDESCRIPTION OF FANCY YARN TYPES

is being produced, not only the speed of the infeed and middle bottom rollers varies, but also the delivery bottom roller. The eff ects are longer than in slub yarn.

MULTI-TWIST YARNMulti-twist processed yarns are produced with the same yarn count and a basic twist multiplier. The eff ects are places with diff erent twists. To accomplish this, the whole drafting zone has to be accelerated and decelerated. The yarn count has to remain the same, i.e. all bottom rollers have to have the same relative acceleration and deceleration. The yarn twist changes due to the relationship between spindle speed and delivery speed. As a rule, multi-twist eff ects tend to be longer eff ects.

MULTI-EFFECT YARNMulti-eff ect yarns are a combination of slub, multi-count and multi-twist eff ects, which creates special yarn eff ects. With multi-eff ect, free programming of the machine is also possible.

Slub yarn Multi-twist yarn

Multi-count yarn Multi-eff ect yarn

T1 T2

=α1 α2

=

T1 T2

α1 α2

=

=

T1 T2

α1 α2

=

=

T3=

α3=

T1 T2=

=α1 α2

T= Twist per unit length, α= Twist multiplier


Eff ect Description Twist Twist multiplier Technical realization

speed variation of infeed / middle bottom roller(mass adjustment)

speed variation of delivery bottom roller(twist multiplier adjustment)

Slub yarn mass variation constant changes yes no

Multi-count mass variation changes constant yes yes

Multi-twist twist variation changes changes yes (adaption of main draft) yes

Multi-eff ect combination of Multi-count and Multi-twist


VARIOspinDATA – EFFECT DESIGN AND SIMULATIONVARIOspinDATA is the Rieter software tool for design and simulation of pattern repeats. The program is Windows-based.

Input, management and modifi cation of the eff ect programs (pattern) is performed offl ine.

The program has a capacity of 700 steps per pattern and 3 diff erent eff ect sizes (mass increase) per repeat. The higher the number of eff ect lengths and the variation in basic yarn length between eff ects, the lower the risk of moiré patterns in the fabric.

The pattern is programmed in VARIOspinDATA. Design options:a) The repeat is available as a fi le (e.g. Excel fi le) and can be

integrated into VARIOspinDATA by „copy/paste“.When using other systems, the pattern can be re-arranged. Some systems start the pattern with a basic thread length. VARIOspin starts with the eff ect.

b) The pattern can be set up as required within the givenlimits or with selected limits via the random generator of VARIOspinDATA.

VARIOspinDATA converts the eff ect data into machine data. Data transfer to the spinning machine is via interface.

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Description and functional featuresVARIOspinDATA

VARIOspinDATA – EFFECT SPECIFICATIONS

EFFECT PARAMETERS3 diff erent mass increases and/or twist changes can be produced.

MASS CHANGEThe mass can be changed within the range of - 50% to + 200%(= 300%).

EFFECT LENGTHThe minimum eff ect length is more or less proportional to the mass increase, i.e. + 50% mass increase ≈ minimum eff ect length of approx. 50 mm. + 200% mass increase ≈ 200 mm minimum eff ect length. There is no limit on maximum eff ect length.

LENGTH OF BASIC YARNThe minimum length of the basic yarn between 2 eff ects, also referred to as the pause, is 50 mm. There is no limit to maximum length.

PATTERN REPEATA pattern repeat consists of several steps. One step contains the effect number, effect length and basic yarn length. The program provides for 700 steps. A pattern repeat starts with an eff ect length.

actual machine data for spinning process

eff ect 20

eff ect2

eff ect1

activate eff ects eff ects upload

eff ects download

explorer for the eff ects

eff ect editor

conversion of the eff ects data to machine data

transfer function

Ring Spinning or ComforSpin machine Personal computer


VARIOspinDATA – EFFECT MANAGEMENT

MAIN WINDOW / FILEOverview of the spinning mill with machines, machine groups and sections as well as eff ect program allocations. New fancy yarn articles can be produced. Existing articles can be edited and deleted.

MANAGEMENTMachine groups can be modifi ed and new machines can be added. This function enables the fancy yarn articles to be managed so that an up-to-date overview of the allocation of the fancy yarn articles to the machines in production is always available. An overview of the existing fancy yarn articles is also provided.

SETTINGSSetting parameters of each machine or machine group can be modifi ed. Font and program options can be selected on request. The program language can be changed. English, German, Turkish, French, Italian and Spanish are currently available. The units of the count system and of yarn twist can easily be selected.

EFFECTSAll eff ect pattern repeats produced can be called up via this function so that the required pattern repeat can then be loaded onto the machine. The pattern repeats are subdivided by type of eff ect for optimum overview.

VISUALIZATIONProgrammed pattern repeats can be visualized by means of a simulation tool. After a fancy yarn pattern repeat has been simulated, the data can be checked by means of an embedded checking function. Simulations of yarn characteristics and fabrics can already be assessed offl ine on-screen so that the fancy yarn pattern repeats can be ideally prepared for production on the machine.

TOOLSData are transferred via an interface from the PC to the machine. The following tasks can be performed:

test of parameter input and communication between PC and machine loading pattern repeats from PC to machineloading pattern repeats from machine to PC deleting pattern repeats directly on the machine.

HELPHelp function for FAQs for creating pattern repeats and for PC – machine communication.

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VARIOspinDATA workspace

VARIOspinDATA blackboard for yarn characteristics


VARIOspin fancy yarn deviceTECHNOLOGICAL AND TECHNICAL DATA

SPINNING RINGSRieter recommends T-fl ange rings for eff ect spinning. Depending on count range, fl ange 1 or 2.

54 MM SPINNING RING FOR DENIMoptimized cop shapecop weight up to ±145 g

TRAVELERTraveler mass must be selected according to the eff ect mass in order to prevent the balloon from collapsing. Recommended traveler shape is high bowed.

SPACERSpacers have to be adapted to the eff ect mass to prevent uncontrolled drafting.

SPINDLE SPEEDAs a base value or general rule, spindle speed can be chosen as for a conventional yarn of the average fancy yarn count. The chosen spindle speed has to be reduced by about 20-30% compared with the conventional yarn.Criteria:

mass increaseseff ect lengthinterval lengthtwist adjustment

COP CHANGE PROCESSThe integrated fancy yarn device enables the cop change process to be handled reliably and effi ciently via the software, both with conventional yarn and with fancy yarn. Spin-off prior to cop change is performed without eff ect. Both twist and draft adjustment are possible.

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Ring Spinning machine1) ComforSpin machine1)

yarn count texNmNe

coarsest count (incl. eff ects):147 tex2)

Nm 6,82)

Ne 42)

coarsest count (incl. eff ects):65 tex2)

Nm 15,32)

Ne 92)

2) depends on total draft

number of spindles- per section

288 - 1 20048

twist rangeT/mTPI

200 - 3 0005 - 76

spindle speed depends on: mass increases, eff ect length, interval length, twist adjustment

total draft 8 - 40 – fold for VARIOspin

minimum eff ect length 50 mm (at 50% mass increase)

maximum eff ect length unlimited

maximum mass increase 200% - with a minimal eff ect length 200mm (assumption: basic yarn mass = 0% plus 200% mass increase)(on the assumption that the basic yarn is taken as 100% a total yarn mass of 300% can be achieved)

database 20 articles can be stored in machine memory

VARIOspinDATA(available languages: English, German, Turkish, French, Spanish, Italian)

700 steps per pattern with 3 eff ects (3 diff erent mass increases)Eff ect simulation of - blackboard for yarn characteristics- woven fabric for weft characteristics

data transfer RS 232 or via Ethernet interface

1) delivery after May 2004

Interval length

Eff ect length Basic length

Basic yarn

Eff ect yarn

www.rieter.com

Rieter Machine Works Ltd.Klosterstrasse 20CH-8406 WinterthurT +41 52 208 71 71F +41 52 208 83 [email protected]

The data and illustrations in this brochure refer to the date of printing. Rieter reserves the right to make any necessary changes at any time and without special notice. Rieter systems and Rieter innovations are protected by patents in most industrialized countries.

1901en-BAAG-42 Printed in CZ

Rieter IngolstadtSpinnereimaschinenbau AGFriedrich-Ebert-Strasse 84DE-85055 IngolstadtT +49 841 95 36 01F +49 841 95 36 850

Rieter CZ a. s.Čsl. armády 1181CZ-56215 Ústí nad OrlicíT +420 465 557 232F +420 465 557 226

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