EP3339487A1 - Procédé de commande de sélection de fil pour systèmes de tissage - Google Patents

Procédé de commande de sélection de fil pour systèmes de tissage Download PDF

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Publication number
EP3339487A1
EP3339487A1 EP17205244.1A EP17205244A EP3339487A1 EP 3339487 A1 EP3339487 A1 EP 3339487A1 EP 17205244 A EP17205244 A EP 17205244A EP 3339487 A1 EP3339487 A1 EP 3339487A1
Authority
EP
European Patent Office
Prior art keywords
feeder
loom
identification value
yarn
feeders
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17205244.1A
Other languages
German (de)
English (en)
Other versions
EP3339487B1 (fr
Inventor
Luca Gotti
Pietro Zenoni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LGL Electronics SpA
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LGL Electronics SpA
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Filing date
Publication date
Application filed by LGL Electronics SpA filed Critical LGL Electronics SpA
Publication of EP3339487A1 publication Critical patent/EP3339487A1/fr
Application granted granted Critical
Publication of EP3339487B1 publication Critical patent/EP3339487B1/fr
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/38—Weft pattern mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/369—Communication systems
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/367—Monitoring yarn quantity on the drum

Definitions

  • the present invention relates to a method of controlling yarn selection for weaving systems.
  • a loom can receive a plurality of yams from respective feeders which are activated alternately on the basis of a preset pattern on the loom. Between the feeders and the loom is a device known as a "presenter", which on the basis of selection information positions the selected weft in front of the gripper of the loom so that it can be picked up.
  • the "pattern preview" function is also known, by way of which the loom transmits the selection information to the feeders in advance.
  • the feeder that is about to be selected can perform some preliminary operations so as to improve the process: for example, for a striped pattern, the feeder can conveniently start before the moment of selection so as to reduce acceleration and, as a consequence, contain the stress on the yarn.
  • the loom sends the feeder other information, including the length of weft inserted and the speed of weaving. Since the feeder adjusts its winding speed on the basis of these three items of information, the precision/accuracy of these is critical to the successful result of the weaving process.
  • the advance selection information is susceptible to errors/changes in the arrangement of the feeders during the step of setting up the weaving process by the user.
  • the selection of the feeder passes through two association tables.
  • the first table associates each one of the yarns in input to the loom, identified in the jargon by a "color", with a selector of the presenter, and the second table associates each one of the selectors of the presenter with a respective feeder.
  • the aim of the present invention is to provide a method of controlling yarn selection for weaving systems, in which the correct execution of the pattern preview function is substantially not susceptible to errors/changes in the connection of the feeders by the user.
  • Figure 1 shows a generic weaving apparatus in which a loom T receives a plurality of yams, e.g., five yarns, each one identified with a respective "color" C1, C2, ..., C5, from respective feeders F1, F2, ..., F5.
  • the feeders F1, F2, ..., F5 pick up the yarn from respective distaffs R1, R2, ..., R5 and are activated alternately by the loom T on the basis of a preestablished pattern.
  • a presenter P which is provided with selectors S1, S2, ..., S5 that, on the basis of selection information, alternately position the selected yarns in front of the gripper (not shown) of the loom T in order to be picked up.
  • FIG. 2 shows, in more detail, any one of the feeders F1, F2, ..., F5, which is designated with F and feeds the generic yarn C picked up by the generic distaff R.
  • the feeder F comprises a drum D on which a motorized flywheel W winds the yarn C originating from the respective distaff in the form of loops that constitute a reserve.
  • the feeder F is fitted with an unwinding sensor Q, typically an optical sensor, which generates an unwinding pulse UWP for each loop or fraction of a loop of yarn unwound from the drum.
  • Operation of the feeder F is controlled by a control unit SPDREG, which adjusts the speed with which the yarn C is wound on the drum D on the basis of information received from the loom by way of a BUS B.
  • Each one of the feeders has a first identification value, NFdr, associated with it, which corresponds to its operative position with respect to the loom.
  • NFdr is a numeric value from 1 to 5 which identifies the position in which the feeder is connected to the electric power supply box.
  • the FdrSel field shows the selection of the feeders during five consecutive insertions Pick N, Pick N+ 1, ..., Pick N+4, after the insertion Pick N-1.
  • the feeder connected to position 2 is selected
  • the feeder connected to position 2 is selected
  • the feeder connected to position 5 is selected
  • the feeder connected to position 5 is selected
  • the feeder connected to position 5 is selected.
  • the loom sends a pattern preview message PPMsg0, PPMsg1, ..., PPMsg5, containing the advance selection information for the next five insertions Pick N, Pick N+1, ..., Pick N+4.
  • each one of the feeders has a second identification value, NFdrPP, associated with it, which identifies it for the purposes of the pattern preview function.
  • NFdrPP is a numeric value that during configuration is set to be equal to NFdr: in essence, the feeder connected to position 1 of the electric power supply box will be identified as feeder 1 in the pattern preview messages as well, and the same is true for the other feeders.
  • the first pattern preview message PPMsg0 should contain the information 2-2-5-2-5.
  • the pattern preview message PPMsg0 in the example in Fig. 3 will contain the information 1-1-5-1-5, but the selection FdrSel in those five insertions will be 2-2-5-2-5. As a consequence, the pattern preview function for that feeder will not be operative.
  • the control unit SPDREG of the feeder F monitors in real time the number of pulses UWP generated by the respective unwinding sensor Q at each insertion and, if the number of pulses UWP exceeds a preestablished threshold value MinPuls for a preestablished minimum number of insertions M, it automatically corrects its NFdrPP value so as to correspond to NFdr.
  • the threshold value MinPuls is equal to a percentage K comprised between 50% and 70%, preferably 60%, of the length of weft inserted at each insertion.
  • MinPuls Int Ylen / FdrC * K where Ylen is the weft length inserted at each insertion and FdrC is the winding circumference of the feeder.
  • MinPuls is equal to 2.
  • the minimum number of insertions can conveniently be equal to 3.
  • the unwinding sensor Q is shown as a piezoelectric sensor accommodated on the yarn guiding bush arranged at the outlet end of the feeder, other types of sensors can also be used, e.g., reflection photocell sensors arranged so as to detect the movements of the yarn on the drum.
  • the signal indicating the unwinding of yarn may be continuous instead of impulse-based, using sliding sensors of different type.
EP17205244.1A 2016-12-14 2017-12-04 Procédé de commande de sélection de fil pour systèmes de tissage Active EP3339487B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000125999A IT201600125999A1 (it) 2016-12-14 2016-12-14 Metodo di controllo della selezione del filato per sistemi di tessitura

Publications (2)

Publication Number Publication Date
EP3339487A1 true EP3339487A1 (fr) 2018-06-27
EP3339487B1 EP3339487B1 (fr) 2019-06-19

Family

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Family Applications (1)

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EP17205244.1A Active EP3339487B1 (fr) 2016-12-14 2017-12-04 Procédé de commande de sélection de fil pour systèmes de tissage

Country Status (3)

Country Link
EP (1) EP3339487B1 (fr)
CN (1) CN108221141B (fr)
IT (1) IT201600125999A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5285821A (en) * 1989-02-16 1994-02-15 Iro Ab Arrangement for controlling feed elements on a textile machine
EP1502980A1 (fr) * 2003-07-29 2005-02-02 L.G.L. Electronics S.p.A. Connection à trois voies pour brancher des fournisseurs de machines textiles à un bus sériel, et système de contrôle basé dessus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10013776A1 (de) * 2000-03-20 2001-10-11 Iro Patent Ag Baar Verfahren zum Eintragen eines Elastomer-Fadens und Fadenverarbeitungssystem
EP1466043B1 (fr) * 2002-01-14 2006-03-29 Iropa Ag Dispositif et procede de commande et/ou de surveillance d'un systeme de traitement de fil
JP2010526000A (ja) * 2007-04-20 2010-07-29 インビスタ テクノロジーズ エス エイ アール エル コンパクトなテンション制御付連続式オーバーエンドテークオフ（オーイーテーオー）糸巻き軸架

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5285821A (en) * 1989-02-16 1994-02-15 Iro Ab Arrangement for controlling feed elements on a textile machine
EP1502980A1 (fr) * 2003-07-29 2005-02-02 L.G.L. Electronics S.p.A. Connection à trois voies pour brancher des fournisseurs de machines textiles à un bus sériel, et système de contrôle basé dessus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "WEFT ACCUMULATOR WITH SEPARATE ADJUSTABLE COILS", 1 July 2010 (2010-07-01), XP055393433, Retrieved from the Internet <URL:http://www.lgl.it/wp-content/uploads/technical/Smart Vector FA/LGL_Smart_Vector_FA_Rv0_ENG.pdf> [retrieved on 20170725] *

Also Published As

Publication number Publication date
CN108221141B (zh) 2021-01-08
IT201600125999A1 (it) 2018-06-14
EP3339487B1 (fr) 2019-06-19
CN108221141A (zh) 2018-06-29

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