EP1314806A3 - A control method and system for weft-braking devices for automatically adjusting the mechanical tension of the yarn in weaving maschines - Google Patents

A control method and system for weft-braking devices for automatically adjusting the mechanical tension of the yarn in weaving maschines Download PDF

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Publication number
EP1314806A3
EP1314806A3 EP02013025A EP02013025A EP1314806A3 EP 1314806 A3 EP1314806 A3 EP 1314806A3 EP 02013025 A EP02013025 A EP 02013025A EP 02013025 A EP02013025 A EP 02013025A EP 1314806 A3 EP1314806 A3 EP 1314806A3
Authority
EP
European Patent Office
Prior art keywords
weft
yarn
weaving
automatically adjusting
picking
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
EP02013025A
Other languages
German (de)
French (fr)
Other versions
EP1314806A2 (en
EP1314806B1 (en
Inventor
Pietro Zenoni
Luca Gotti
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
Original Assignee
LGL Electronics SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LGL Electronics SpA filed Critical LGL Electronics SpA
Publication of EP1314806A2 publication Critical patent/EP1314806A2/en
Publication of EP1314806A3 publication Critical patent/EP1314806A3/en
Application granted granted Critical
Publication of EP1314806B1 publication Critical patent/EP1314806B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Braking Arrangements (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

An improved method for controlling electrically operated weft-braking devices, capable of automatically adjusting the mechanical tension of the weft yarn (F) in mechanical-picking weaving machines (TE), is disclosed herein. The excitation current (Ie) of the weft-braking device (LF) is controlled by an adjustment loop (A) using a signal (tens-mis), which is a measure of the actual tension of the yarn, as a feedback signal for the adjustment loop (A). The improvement comprises employing an average value (TMx), which is computed at predetermined intervals (x) of weft picking and for a predetermined number (i) of picking strokes, in order to measure the direct tension of the thread (F), so that said average value (TMx) is substantially stable and not affected by fluctuations due to variations of the parameters of the weaving process.
EP02013025A 2001-07-25 2002-06-13 A control method and system for weft-braking devices for automatically adjusting the mechanical tension of the yarn in weaving maschines Expired - Lifetime EP1314806B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20010737 2001-07-25
IT2001TO000737A ITTO20010737A1 (en) 2001-07-25 2001-07-25 PERFECTED METHOD AND SYSTEM FOR CHECKING BRAKES AND ELECTRIC-CONTROLLED DEVICES FOR AUTOMATIC ADJUSTMENT OF MECHANICAL VOLTAGE

Publications (3)

Publication Number Publication Date
EP1314806A2 EP1314806A2 (en) 2003-05-28
EP1314806A3 true EP1314806A3 (en) 2003-11-12
EP1314806B1 EP1314806B1 (en) 2006-12-13

Family

ID=11459090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02013025A Expired - Lifetime EP1314806B1 (en) 2001-07-25 2002-06-13 A control method and system for weft-braking devices for automatically adjusting the mechanical tension of the yarn in weaving maschines

Country Status (4)

Country Link
EP (1) EP1314806B1 (en)
CN (1) CN100439582C (en)
DE (1) DE60216713T2 (en)
IT (1) ITTO20010737A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343506A1 (en) * 2003-09-19 2005-04-14 Iropa Ag Method for adaptively controlling an electrically operated weft brake
ITMI20051325A1 (en) * 2005-07-12 2007-01-13 Btsr Int Spa METHOD AND DEVICE TO ENSURE THE SUPPLY OF A CONSTANT VOLTAGE THREAD WITH A DOUBLE RING ADJUSTMENT TO A TEXTILE MACHINE
ITTO20050484A1 (en) * 2005-07-14 2007-01-15 L G L Electronics Spa CONTROL UNIT FOR YARN BRAKING DEVICES IN WEAVE FEEDERS FOR WEAVING FRAMES, AND PROCEDURE FOR TUNING THE SAME
EP1961686B1 (en) * 2007-02-20 2016-09-14 Iro Ab Yarn tension monitoring and setting system
ITTO20110840A1 (en) * 2011-09-20 2013-03-21 Lgl Electronics Spa METHOD OF CALIBRATION OF TENSIONED YARN POWER SUPPLIES CONTROLLED ON WEAVING LINES.
ITTO20110977A1 (en) 2011-10-27 2013-04-28 Lgl Electronics Spa "METHOD AND DEVICE FOR THE OPENING AND NEXT CLOSING OF A WEAVING BRAKE IN A YARN FEEDER"
CN104073959B (en) * 2013-03-25 2015-12-23 杨欣圃 Coaxial electrical magnetic compensation tensioner
EP2924156B1 (en) * 2014-03-28 2016-11-23 L.G.L. Electronics S.p.A. Yarn-braking device for storage yarn feeders
DE102015118027B3 (en) * 2015-10-22 2016-11-17 Memminger-Iro Gmbh Method for controlling the thread delivery of a yarn feeding device and yarn feeding device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0619261A1 (en) * 1993-04-05 1994-10-12 B.T.S.R. International S.p.A. Method and device for monitoring and maintaining correct regulation of the tension of a yarn fed to a textile machine
US5476122A (en) * 1993-03-05 1995-12-19 Lindauer Dornier Gesellschaft Mbh Weft thread brake responsive to yarn characteristics in a loom
US5669421A (en) * 1994-10-17 1997-09-23 Sulzer Ruti Ag Method of controlling the yarn tension in a weaving machine
EP1106721A1 (en) * 1999-11-30 2001-06-13 L.G.L. Electronics S.p.A. Method and device for controlling electrically actuated weft brakes for the automatic adjustment of mechanical tension of a weft thread in textile machines with mechanical insertion

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9400248D0 (en) * 1994-01-26 1994-01-26 Iro Ab Controllable output brake for yarn feed device for textile machines, in particular projectile or gripper-type weaving machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5476122A (en) * 1993-03-05 1995-12-19 Lindauer Dornier Gesellschaft Mbh Weft thread brake responsive to yarn characteristics in a loom
EP0619261A1 (en) * 1993-04-05 1994-10-12 B.T.S.R. International S.p.A. Method and device for monitoring and maintaining correct regulation of the tension of a yarn fed to a textile machine
US5669421A (en) * 1994-10-17 1997-09-23 Sulzer Ruti Ag Method of controlling the yarn tension in a weaving machine
EP1106721A1 (en) * 1999-11-30 2001-06-13 L.G.L. Electronics S.p.A. Method and device for controlling electrically actuated weft brakes for the automatic adjustment of mechanical tension of a weft thread in textile machines with mechanical insertion

Also Published As

Publication number Publication date
ITTO20010737A1 (en) 2003-01-25
EP1314806A2 (en) 2003-05-28
CN100439582C (en) 2008-12-03
ITTO20010737A0 (en) 2001-07-25
EP1314806B1 (en) 2006-12-13
DE60216713T2 (en) 2007-11-08
DE60216713D1 (en) 2007-01-25
CN1399022A (en) 2003-02-26

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