EP2862970B1 - Monitoring and regulation of the yarn consumption in a flat knitting machine - Google Patents

Monitoring and regulation of the yarn consumption in a flat knitting machine Download PDF

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Publication number
EP2862970B1
EP2862970B1 EP13189257.2A EP13189257A EP2862970B1 EP 2862970 B1 EP2862970 B1 EP 2862970B1 EP 13189257 A EP13189257 A EP 13189257A EP 2862970 B1 EP2862970 B1 EP 2862970B1
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EP
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Prior art keywords
yarn
correction values
knitted
length
knitting machine
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EP13189257.2A
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German (de)
French (fr)
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EP2862970A1 (en
Inventor
Peter Drews
Michael Wolf
Eberhard Gekeler
Matthias Finkbeiner
Ulrich Schellhaas
Erhard Vöhringer
Luigi Perrotta
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H Stoll GmbH and Co KG
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H Stoll GmbH and Co KG
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Priority to EP13189257.2A priority Critical patent/EP2862970B1/en
Priority to CN201410550217.XA priority patent/CN104562422B/en
Publication of EP2862970A1 publication Critical patent/EP2862970A1/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/488—Thread-feeding devices in co-operation with stitch-length-regulating mechanism
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements

Definitions

  • the length of the actually used yarn is measured and compared with a pre-calculated setpoint. If the deviation of the actual value from the target value exceeds a predetermined tolerance limit, then the measured actual value of the yarn consumption is corrected by changing the stitch length by a corresponding control of trigger parts, in particular of needle knives of the machine, until its deviation from the desired value lies within the tolerance limits again.
  • the nominal value of the yarn consumption for a row to be knitted not only the mesh size typical per needle but also possibly existing transitions between the needle beds as well as possible offset movements of the needle beds and any floats are included.
  • other parameters such as the type of thread used, the thread tension, the mutual spacing of the needle beds and properties of the knitted type of binding such as right-right, single-bed or rib knit, which also affect the yarn length, make it impossible to set the setpoint with absolute precision determine. If the type of binding remains the same within a knitted part, the actual value of the yarn consumption can be brought to the desired value within a few knitting rows by regulating the yarn length.
  • the EP 0 699 792 A1 describes a method for controlling the thread length during the production of an intarsia tricot or rib knit on a flat knitting machine for its manufacture several different yarns from different directions must be fed to a knitting lock.
  • a test fabric is first prepared.
  • the resulting correction values for the trigger parts are then adopted for further production. During the actual production process, no changes are made to the correction values.
  • the present invention has for its object to provide a method for controlling the yarn consumption, with which these corrections can be avoided at the transition to another type of binding.
  • the correction values determined for the respective types of weave can be further improved.
  • the length of the rows of stitches is not taken into account for determining the correction values per type of weave. If you want to make the same knitwear in a different size, you have to for the new size, no recalculation of the correction values for the weave types occurring in the knit fabric. The once determined correction values are also valid for all new sizes.
  • the thread length measuring means used to make the binding type, and the direction of the carriage of the flat knitting machine can be taken into account for determining the correction values per binding type.
  • different yarn tensions can occur. Even with a transition from one needle bed to another, more yarn is needed between the stitches than between adjacent stitches of the same needle bed.
  • a separate yarn guide with associated thread length measuring device is used for each yarn also a separate yarn guide with associated thread length measuring device. If it is therefore determined which yarn length measuring device the determined yarn length originates from, the yarn quality is also included in the determination of the correction values.
  • an average value can be formed and stored from the correction values determined in each stitch row.
  • the value obtained in this way is very stable, so that during the transition to further production of the desired knitwear the correction values for all weave types are already very accurate and only fluctuations in the yarn quality during production have to be compensated.
  • the knits are designed at so-called design design facilities or patterning facilities, the one Designers offer various graphic aids and display options of his knit design and also automatically create machine control data from the design.
  • the pattern data of the knitted fabric with the weave types and the deduction partial positions are transferred from such a knit design design to the flat knitting machine.
  • the correction values stored for each type of binding can be used for triggering the withdrawal parts for other knitted fabrics having the same binding types and / or can be transferred to other knitting machines.
  • the correction values can preferably be stored in a memory of the machine and / or on an external storage medium to which several machines have access.
  • the yarn consumption control can also be switched off for certain or all fabric areas. This can be advantageous in particular if, from a technical point of view, regulation in a region such as a cuff is not desired.
  • the regulation can be reactivated at any time. The determination of the correction values based on pattern data and a first knit piece is no longer necessary in this case, even if changing to other sizes and / or yarn qualities.
  • the currently knitted weave type is displayed with the used correction values. This allows visual control of the production process.
  • the invention also relates to a flat knitting machine for carrying out a method according to the invention with at least two needle beds, a carriage with at least one lock system and a plurality of thread guides with associated thread length measuring devices, which is characterized in that it has a device for mesh length control, the data from the yarn length measuring devices a comparison of Actual values of the yarn consumption are stored with stored in a memory setpoints of yarn consumption and using data of a knit design designer for each type of binding correction values for the position of trigger parts of the at least one lock system generates and generates control signals for the trigger parts on the at least one lock system.
  • the device for mesh length control can also have a memory for the correction values determined for each binding type.
  • the correction values can be stored elsewhere in the flat knitting machine and / or on an external storage medium.
  • the single FIGURE shows a schematic view of a knit design design device 1 and a flat knitting machine 2.
  • the knit design design facility 1 off Fig.1 has as a central unit on a computer 10, run on the programs for creating knitted patterns. With the help of a keyboard 11 or a pad 12, the desired shape, the type of binding, the yarns to be used and the size of the knitted fabric can be entered. The on the Calculator 10 existing programs create a draft for the knit and display this on a display device 13 in various forms of representation. When designing the knitted fabric, depending on the desired mesh appearance and size, information about the trim part positions for the different weave types is also specified. After completion of the design, the design data is transferred from the computer 10 to a flat knitting machine 2, which is indicated by the arrow W.
  • a first knitted piece 21 having the same pattern data as the knit pieces to be subsequently produced is first created using the design data.
  • all deduction partial data applicable to the respective types of binding the combination of stitch formation on the front and rear needle bed and the direction of a carriage 23 of the machine 2 are detected.
  • a thread length measurement is carried out before each thread guide used and the associated thread length measuring device 22 is detected.
  • These data are stored and the measured actual value of the yarn consumption compared with a stored setpoint. If the actual value deviates from the nominal value outside of a tolerance limit, a correction value for the mesh length is calculated and the deduction partial specification for the binding type is corrected and stored accordingly. With the corrected values, corresponding control signals for the withdrawal parts of the machine 2 are then generated.
  • the following knit pieces are produced using the correction values per type of weave, the stitch length optionally being further adjusted due to yarn variations that occur.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Description

Zur Überwachung und Regelung des Garnverbrauchs an einer Flachstrickmaschine wird die Länge des tatsächlich verbrauchten Garnes gemessen und mit einem vorberechneten Sollwert verglichen. Überschreitet die Abweichung des Istwertes vom Sollwert eine vorgegebene Toleranzgrenze, so wird durch Veränderung der Maschenlänge durch eine entsprechende Ansteuerung von Abzugsteilen, insbesondere von Nadelsenkern der Maschine, der gemessene Istwert des Garnverbrauchs so lange korrigiert, bis seine Abweichung vom Sollwert wieder innerhalb der Toleranzgrenzen liegt.To monitor and control the yarn consumption on a flat knitting machine, the length of the actually used yarn is measured and compared with a pre-calculated setpoint. If the deviation of the actual value from the target value exceeds a predetermined tolerance limit, then the measured actual value of the yarn consumption is corrected by changing the stitch length by a corresponding control of trigger parts, in particular of needle knives of the machine, until its deviation from the desired value lies within the tolerance limits again.

Bei der Berechnung des Sollwerts des Garnverbrauchs für eine zu strickende Reihe werden außer der für die pro Nadel typische Maschenlänge auch noch gegebenenfalls vorhandene Übergänge zwischen den Nadelbetten sowie eventuelle Versatzbewegungen der Nadelbetten und etwaige Flottungen mit eingerechnet. Durch weitere Parameter wie die verwendete Garnart, die Fadenspannung, der gegenseitige Abstand der Nadelbetten sowie Eigenschaften der gestrickten Bindungsart wie Rechts-Rechts, einbettig oder Rippgestrick, die ebenfalls eine Auswirkung auf die Garnlänge haben, ist es jedoch nicht möglich, den Sollwert absolut präzise zu bestimmen. Bleibt die Bindungsart innerhalb eines Gestrickteils gleich, so kann durch die Regelung der Garnlänge der Istwert des Garnverbrauchs innerhalb von einigen Strickreihen an den Sollwert herangeführt werden.When calculating the nominal value of the yarn consumption for a row to be knitted, not only the mesh size typical per needle but also possibly existing transitions between the needle beds as well as possible offset movements of the needle beds and any floats are included. However, other parameters such as the type of thread used, the thread tension, the mutual spacing of the needle beds and properties of the knitted type of binding such as right-right, single-bed or rib knit, which also affect the yarn length, make it impossible to set the setpoint with absolute precision determine. If the type of binding remains the same within a knitted part, the actual value of the yarn consumption can be brought to the desired value within a few knitting rows by regulating the yarn length.

Ändert sich die Bindungsart innerhalb eines Gestrickteils jedoch, können am Übergang die Istwerte stark von den Sollwerten abweichen, sodass es zu großen Korrektursprüngen kommt, die sich zum Teil erst über mehrere Strickreihen hinweg einschwingen. Diese Strickreihen weisen sichtbare Schwankungen der Maschenlänge auf.However, if the type of weave changes within a knitted fabric, the actual values at the transition can deviate greatly from the target values, which leads to large corrections, some of which only settle over several knitting rows. These knitting rows have visible variations in stitch length.

Aus der EP 0 723 042 A1 ist eine Flachstrickmaschine mit einer Einrichtung zur Regelung des Garnverbrauchs bekannt, bei der die Fadenlänge je Strickschloss und Garn geregelt wird. Dazu werden vor dem Beginn der Herstellung eines Gestricks einige Maschenreihen gestrickt und die ermittelten Werte des Garnverbrauchs je Strickschloss und Garn in einem Speicher als Referenzwerte für die Regelung abgelegt.From the EP 0 723 042 A1 is a flat knitting machine with a device for controlling the yarn consumption is known, in which the thread length is controlled knit lock and yarn. For this purpose, a few courses are knitted prior to the start of the production of a knitted fabric and the determined values of the yarn consumption per knitting lock and yarn are stored in a memory as reference values for the control.

Die EP 0 699 792 A1 beschreibt ein Verfahren zur Regelung der Fadenlänge während der Herstellung eines Intarsiagestricks oder Rippgestricks auf einer Flachstrickmaschine, zu dessen Herstellung mehrere unterschiedliche Garne aus verschiedenen Richtungen einem Strickschloss zugeführt werden müssen. Bei diesem Verfahren wird zunächst ein Testgestrick hergestellt. Die dabei ermittelten Korrekturwerte für die Abzugsteile werden anschließend für die weitere Produktion übernommen. Während des eigentlichen Produktionsprozesses werden keine Änderungen an den Korrekturwerten mehr vorgenommen.The EP 0 699 792 A1 describes a method for controlling the thread length during the production of an intarsia tricot or rib knit on a flat knitting machine for its manufacture several different yarns from different directions must be fed to a knitting lock. In this method, a test fabric is first prepared. The resulting correction values for the trigger parts are then adopted for further production. During the actual production process, no changes are made to the correction values.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Regelung des Garnverbrauchs bereitzustellen, mit dem sich diese Korrektursprünge am Übergang zu einer anderen Bindungsart vermeiden lassen.The present invention has for its object to provide a method for controlling the yarn consumption, with which these corrections can be avoided at the transition to another type of binding.

Die Aufgabe wird gelöst durch ein Verfahren mit den Merkmalen des Anspruchs 1.The object is achieved by a method having the features of claim 1.

Bei dem erfindungsgemäßen Verfahren werden nach dem Erfassen der Korrekturwerte am ersten Gestrickstück bei der Produktion der weiteren Gestrickstücke bereits beim Beginn eines Bereichs in einer neuen Bindungsart sehr gute Korrekturwerte für die Ansteuerung der Abzugsteile zur Verfügung gestellt. Während der Produktion müssen nur noch Garnschwankungen erfasst und in die Korrekturwerte mit eingerechnet werden. Dadurch entfallen die bisher notwendigen Anpassungsstrickreihen mit sichtbaren Schwankungen in der Maschenlänge.In the method according to the invention, after the detection of the correction values on the first knitted piece in the production of the further knitted pieces, very good correction values for the triggering of the deduction parts are made available already at the beginning of an area in a new binding type. During production, only yarn fluctuations must be recorded and included in the correction values. This eliminates the previously necessary adjustment knitting rows with visible fluctuations in the stitch length.

Bei der Produktion der weiteren Gestricke können die für die jeweiligen Bindungsarten ermittelten Korrekturwerte weiter verbessert werden.In the production of the other knitted fabrics, the correction values determined for the respective types of weave can be further improved.

Dabei wird zur Ermittlung der Korrekturwerte je Bindungsart die Länge der Maschenreihen nicht berücksichtigt. Soll das gleiche Gestrick in einer anderen Größe hergestellt werden, so muss für die neue Größe keine Neuberechnung der Korrekturwerte für die im Gestrick vorkommenden Bindungsarten erfolgen. Die einmal ermittelten Korrekturwerte sind auch für alle neuen Größen gültig.The length of the rows of stitches is not taken into account for determining the correction values per type of weave. If you want to make the same knitwear in a different size, you have to for the new size, no recalculation of the correction values for the weave types occurring in the knit fabric. The once determined correction values are also valid for all new sizes.

Zur weiteren Erhöhung der Genauigkeit können zur Ermittlung der Korrekturwerte je Bindungsart das Stricken auf dem vorderen oder hinteren Nadelbett, die zur Herstellung der Bindungsart verwendete/n Fadenlängenmesseinrichtung/en sowie die Richtung des Schlittens der Flachstrickmaschine berücksichtigt werden. Je nach Schlittenrichtung können unterschiedliche Garnspannungen auftreten. Auch bei einem Übergang von einem Nadelbett zum anderen wird zwischen den Maschen mehr Garn benötigt als zwischen benachbarten Maschen desselben Nadelbetts. Für jedes Garn wird außerdem ein eigener Fadenführer mit zugehöriger Fadenlängenmesseinrichtung verwendet. Wird daher festgehalten, von welcher Fadenlängenmesseinrichtung die ermittelte Fadenlänge stammt, geht in die Ermittlung der Korrekturwerte auch die Garnqualität mit ein.To further increase the accuracy, knitting on the front or back needle bed, the thread length measuring means used to make the binding type, and the direction of the carriage of the flat knitting machine can be taken into account for determining the correction values per binding type. Depending on the carriage direction, different yarn tensions can occur. Even with a transition from one needle bed to another, more yarn is needed between the stitches than between adjacent stitches of the same needle bed. For each yarn also a separate yarn guide with associated thread length measuring device is used. If it is therefore determined which yarn length measuring device the determined yarn length originates from, the yarn quality is also included in the determination of the correction values.

Bei einem Bereich mit mehreren in einer bestimmten Bindungsart hergestellten Maschenreihen des ersten Gestrickstücks oder auch bei Wiederholung eines solchen Bereichs an anderer Stelle im Gestrick kann aus den in jeder Maschenreihe ermittelten Korrekturwerten ein Mittelwert gebildet und abgespeichert werden. Der so erhaltene Wert ist sehr stabil, sodass beim Übergang zur weiteren Produktion des gewünschten Gestricks die Korrekturwerte für alle Bindungsarten bereits sehr genau sind und nur noch Schwankungen in der Garnqualität während der Produktion ausgeglichen werden müssen.In the case of an area with several courses of stitches of the first knitted piece produced in a certain type of weave, or even if such a section is repeated elsewhere in the knitted fabric, an average value can be formed and stored from the correction values determined in each stitch row. The value obtained in this way is very stable, so that during the transition to further production of the desired knitwear the correction values for all weave types are already very accurate and only fluctuations in the yarn quality during production have to be compensated.

Bei modernen Flachstrickmaschinen werden die Gestricke an sogenannten Designentwurfsanlagen oder Musterungsanlagen entworfen, die einem Designer diverse grafische Hilfsmittel und Darstellungsmöglichkeiten seines Gestricksentwurfs bieten und die außerdem aus dem Design automatisch Maschinensteuerungsdaten erstellen. Auch beim erfindungsgemäßen Verfahren ist es daher zweckmäßig, dass die Musterdaten des Gestricks mit den Bindungsarten und den Abzugsteilpositionen von einer solchen Gestrickdesign-Entwurfsanlage an die Flachstrickmaschine übergeben werden.In modern flat knitting machines, the knits are designed at so-called design design facilities or patterning facilities, the one Designers offer various graphic aids and display options of his knit design and also automatically create machine control data from the design. In the method according to the invention, it is therefore also expedient that the pattern data of the knitted fabric with the weave types and the deduction partial positions are transferred from such a knit design design to the flat knitting machine.

Weiter ist es vorteilhaft, wenn die je Bindungsart abgespeicherten Korrekturwerte für die Ansteuerung der Abzugsteile für andere Gestricke mit gleichen Bindungsarten verwendet und/oder an andere Strickmaschinen übergeben werden können. Dazu können die Korrekturwerte vorzugsweise in einem Speicher der Maschine und/oder auf einem externen Speichermedium abgelegt werden, auf das mehrere Maschinen Zugriff haben.It is also advantageous if the correction values stored for each type of binding can be used for triggering the withdrawal parts for other knitted fabrics having the same binding types and / or can be transferred to other knitting machines. For this purpose, the correction values can preferably be stored in a memory of the machine and / or on an external storage medium to which several machines have access.

Die Regelung des Garnverbrauchs kann für bestimmte oder alle Gestrickbereiche auch abgeschaltet werden. Dies kann insbesondere dann vorteilhaft sein, wenn aus stricktechnischen Gesichtspunkten eine Regelung in einem Bereich wie beispielsweise einem Bündchen nicht gewünscht wird. Die Regelung kann jederzeit wieder aktiviert werden. Das Ermitteln der Korrekturwerte anhand von Musterdaten und eines ersten Gestrickstücks ist in diesem Fall nicht mehr erforderlich, auch wenn auf andere Größen und/oder Garnqualitäten übergegangen wird.The yarn consumption control can also be switched off for certain or all fabric areas. This can be advantageous in particular if, from a technical point of view, regulation in a region such as a cuff is not desired. The regulation can be reactivated at any time. The determination of the correction values based on pattern data and a first knit piece is no longer necessary in this case, even if changing to other sizes and / or yarn qualities.

Für das Bedienpersonal der Flachstrickmaschine ist es weiter vorteilhaft, wenn während der Produktion des Gestricks auf einer Anzeigeeinrichtung die gerade gestrickte Bindungsart mit den verwendeten Korrekturwerten angezeigt wird. Dies ermöglicht eine optische Kontrolle des Produktionsvorgangs.For the operator of the flat knitting machine, it is also advantageous if, during production of the knitted fabric on a display device, the currently knitted weave type is displayed with the used correction values. This allows visual control of the production process.

Die Erfindung betrifft außerdem eine Flachstrickmaschine zur Durchführung eines erfindungsgemäßen Verfahrens mit mindestens zwei Nadelbetten, einem Schlitten mit mindestens einem Schlosssystem und mehreren Fadenführern mit zugeordneten Fadenlängenmesseinrichtungen, die dadurch gekennzeichnet ist, dass sie eine Einrichtung zur Maschenlängensteuerung aufweist, die aus Daten der Fadenlängenmesseinrichtungen einen Vergleich der Istwerte des Garnverbrauchs mit in einem Speicher hinterlegten Sollwerten des Garnverbrauchs durchführt und mit Hilfe von Daten einer Gestrickdesign-Entwurfseinrichtung für jede Bindungsart Korrekturwerte für die Position von Abzugsteilen des mindestens einen Schlosssystems erzeugt und daraus Steuerungssignale für die Abzugsteile an dem mindesten einen Schlosssystem generiert.The invention also relates to a flat knitting machine for carrying out a method according to the invention with at least two needle beds, a carriage with at least one lock system and a plurality of thread guides with associated thread length measuring devices, which is characterized in that it has a device for mesh length control, the data from the yarn length measuring devices a comparison of Actual values of the yarn consumption are stored with stored in a memory setpoints of yarn consumption and using data of a knit design designer for each type of binding correction values for the position of trigger parts of the at least one lock system generates and generates control signals for the trigger parts on the at least one lock system.

Die Einrichtung zur Maschenlängensteuerung kann dabei auch einen Speicher für die je Bindungsart ermittelten Korrekturwerte aufweisen. Die Korrekturwerte können jedoch an anderer Stelle der Flachstrickmaschine und/oder auf einem externen Speichermedium abgespeichert werden.The device for mesh length control can also have a memory for the correction values determined for each binding type. However, the correction values can be stored elsewhere in the flat knitting machine and / or on an external storage medium.

Im Folgenden wird ein erfindungsgemäßes Verfahren mit Bezug auf die Zeichnung noch näher beschrieben.In the following, a method according to the invention will be described in more detail with reference to the drawing.

Die einzige Figur zeigt eine schematische Ansicht einer Gestrickdesign-Entwurfseinrichtung 1 und einer Flachstrickmaschine 2.The single FIGURE shows a schematic view of a knit design design device 1 and a flat knitting machine 2.

Die Gestrickdesign-Entwurfsanlage 1 aus Fig.1 weist als zentrale Einheit einen Rechner 10 auf, auf dem Programme zur Erstellung von Gestrickmustern laufen. Mit Hilfe einer Tastatur 11 oder einem Pad 12 können die gewünschte Form, die Bindungsart, die zu verwendenden Garne sowie die Größe des Gestricks eingegeben werden. Die auf dem Rechner 10 vorhandenen Programme erstellen daraus einen Entwurf für das Gestrick und zeigen dieses auf einer Anzeigeeinrichtung 13 in verschiedenen Darstellungsformen an. Beim Entwurf des Gestricks werden je nach gewünschter Maschenoptik und-größe auch Angaben über die Abzugsteilpositionen für die verschiedenen Bindungsarten festgelegt. Nach Fertigstellung des Entwurfs werden die Entwurfsdaten vom Rechner 10 an eine Flachstrickmaschine 2 übergeben, was durch den Pfeil W angedeutet ist.The knit design design facility 1 off Fig.1 has as a central unit on a computer 10, run on the programs for creating knitted patterns. With the help of a keyboard 11 or a pad 12, the desired shape, the type of binding, the yarns to be used and the size of the knitted fabric can be entered. The on the Calculator 10 existing programs create a draft for the knit and display this on a display device 13 in various forms of representation. When designing the knitted fabric, depending on the desired mesh appearance and size, information about the trim part positions for the different weave types is also specified. After completion of the design, the design data is transferred from the computer 10 to a flat knitting machine 2, which is indicated by the arrow W.

Auf der Maschine 2 wird mit den Entwurfsdaten zunächst ein erstes Gestrickstück 21 mit den gleichen Musterdaten wie die nachfolgend zu fertigenden Gestrickteile erstellt. Während der Fertigung des ersten Gestrickstücks werden alle für die jeweiligen Bindungsarten geltenden Abzugsteilangaben, die Kombination einer Maschenbildung auf dem vorderen und dem hinteren Nadelbett sowie die Richtung eines Schlittens 23 der Maschine 2 erfasst. Weiter wird eine Fadenlängenmessung vor jedem verwendeten Fadenführer vorgenommen und die zugehörige Fadenlängenmesseinrichtung 22 erfasst. Diese Daten werden abgespeichert und der gemessene Istwert des Garnverbrauchs mit einem abgespeicherten Sollwert verglichen. Bei einer Abweichung des Istwerts vom Sollwert außerhalb einer Toleranzgrenze wird ein Korrekturwert für die Maschenlänge errechnet und die Abzugsteilangabe für die Bindungsart entsprechend korrigiert und abgespeichert. Mit den korrigierten Werten werden dann entsprechende Steuerungssignale für die Abzugsteile der Maschine 2 generiert. Nach Fertigstellung des ersten Gestrickstücks werden die nachfolgenden Gestrickstücke unter Verwendung der Korrekturwerte je Bindungsart hergestellt, wobei die Maschenlänge gegebenenfalls noch wegen auftretender Garnschwankungen weiter angepasst wird.On the machine 2, a first knitted piece 21 having the same pattern data as the knit pieces to be subsequently produced is first created using the design data. During the production of the first knitted piece, all deduction partial data applicable to the respective types of binding, the combination of stitch formation on the front and rear needle bed and the direction of a carriage 23 of the machine 2 are detected. Furthermore, a thread length measurement is carried out before each thread guide used and the associated thread length measuring device 22 is detected. These data are stored and the measured actual value of the yarn consumption compared with a stored setpoint. If the actual value deviates from the nominal value outside of a tolerance limit, a correction value for the mesh length is calculated and the deduction partial specification for the binding type is corrected and stored accordingly. With the corrected values, corresponding control signals for the withdrawal parts of the machine 2 are then generated. After completion of the first knit piece, the following knit pieces are produced using the correction values per type of weave, the stitch length optionally being further adjusted due to yarn variations that occur.

Claims (10)

  1. Method for controlling the yarn consumption of a knitted fabric manufactured on a flatbed knitting machine (2) by measuring an actual value for the yarn consumption and controlling to a target value by matching of the loop length, wherein the knitted fabric is manufactured with yarns which are each supplied via a yarn-length measuring device (22) and a yarn guide to the needles of a front and/or rear needle bed of the flatbed knitting machine (2), wherein, in order to determine a correction value for the control of the take-off elements of the flatbed knitting machine influencing the loop length, the position of the take-off element specified in the case of preparing the pattern for the knitted fabric for every stitch type of the knitted fabric is taken into consideration and, at the start of production, a first knitted-fabric piece (21) is manufactured with the same pattern data as for the other knitted fabrics to be produced and, through continuous measurement of the actual value of the yarn consumption and comparison with the target value, the correction value for every stitch type occurring in the knitted fabric is calculated and further improved and stored, characterised in that, following this, the production of the further knitted fabrics is implemented with the use of the determined correction values for the control of the take-off elements, wherein, in order to determine the correction values for each stitch type, the length of the loop rows is not taken into consideration.
  2. Method according to claim 1, characterised in that, in the production of the further knitted fabrics, the correction values determined for the respective stitch types are further improved.
  3. Method according to claim 1 or 2, characterised in that, in order to determine the correction values for each stitch type, the knitting on the front or rear needle bed, the yarn-length measuring device/s (22) used for the manufacture of the stitch type and the direction of the carriage (23) of the flatbed knitting machine (2) are taken into consideration.
  4. Method according to any one of the preceding claims, characterised in that, in the case of a region with several loop rows of the first knitted fabric piece manufactured in a given stitch type, an average value is forged from the correction values determined in each loop row and stored.
  5. Method according to any one of the preceding claims, characterised in that the pattern data of the knitted fabric with the stitch types and the take-off element positions are transferred from a knitting design unit (1) to the flatbed knitting machine (2).
  6. Method according to any one of the preceding claims, characterised in that the correction values stored for each stitch type can be used for the control of the take-off elements for other knitted fabrics with the same stitch types and/or transferred to other knitting machines.
  7. Method according to any one of the preceding claims, characterised in that the control of the yarn consumption can be switched off for given knitted-fabric regions.
  8. Method according to any one of the preceding claims, characterised in that, during the production of the knitted fabric, the currently knitted stitch type is displayed on a display device with the correction values used.
  9. Knitting machine for the implementation of a method according to one of claims 1 to 7 with at least two needle beds, a carriage (23) with at least one cam system and several yarn guides with associated yarn-length measuring devices (22), characterised in that it comprises a device for loop-length control, which, from data of the yarn-length measuring devices (22) implements a comparison of the actual values for the yarn consumption with target values for the yarn consumption stored in a memory and, by means of data of an knitting design unit (1) generates correction values for the position of take-off elements of the at least one cam system for every stitch type, without consideration of the length of the loop rows, and from these, generates control signals for the take-off elements in the at least one cam system.
  10. Flatbed knitting machine according to claim 9, characterised in that the device for loop-length control comprises a memory for the correction values determined for each stitch type.
EP13189257.2A 2013-10-18 2013-10-18 Monitoring and regulation of the yarn consumption in a flat knitting machine Active EP2862970B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13189257.2A EP2862970B1 (en) 2013-10-18 2013-10-18 Monitoring and regulation of the yarn consumption in a flat knitting machine
CN201410550217.XA CN104562422B (en) 2013-10-18 2014-10-17 Monitoring and regulating the yarn consumption on flat knitting machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13189257.2A EP2862970B1 (en) 2013-10-18 2013-10-18 Monitoring and regulation of the yarn consumption in a flat knitting machine

Publications (2)

Publication Number Publication Date
EP2862970A1 EP2862970A1 (en) 2015-04-22
EP2862970B1 true EP2862970B1 (en) 2016-09-28

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EP13189257.2A Active EP2862970B1 (en) 2013-10-18 2013-10-18 Monitoring and regulation of the yarn consumption in a flat knitting machine

Country Status (2)

Country Link
EP (1) EP2862970B1 (en)
CN (1) CN104562422B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107988698B (en) * 2017-12-30 2020-01-31 广东溢达纺织有限公司 Knitting control system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6262977A (en) * 1985-09-11 1987-03-19 株式会社島精機製作所 Mesh control method
KR100351612B1 (en) * 1994-09-02 2002-12-26 가부시키가이샤 시마세이키 세이사쿠쇼 Thread length control method in flat knitting machine and its device
JP3085638B2 (en) * 1995-01-23 2000-09-11 株式会社島精機製作所 Yarn length control device in flat knitting machine
DE19822321A1 (en) * 1998-05-19 1999-11-25 Stoll & Co H Process for producing a knitted piece on a knitting machine
EP2280104B1 (en) * 2008-05-02 2016-05-25 Shima Seiki Manufacturing., Ltd. Device and program for loop length routine setting in a flatbed knitting machine
JP5698491B2 (en) * 2010-10-08 2015-04-08 株式会社島精機製作所 Yarn length control device and control method in flat knitting machine

Also Published As

Publication number Publication date
CN104562422B (en) 2017-07-11
EP2862970A1 (en) 2015-04-22
CN104562422A (en) 2015-04-29

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