EP0415222B1 - Verfahren zum Einstellen der Ansprechgrenze elektronischer Garnreiniger - Google Patents

Verfahren zum Einstellen der Ansprechgrenze elektronischer Garnreiniger Download PDF

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Publication number
EP0415222B1
EP0415222B1 EP90115906A EP90115906A EP0415222B1 EP 0415222 B1 EP0415222 B1 EP 0415222B1 EP 90115906 A EP90115906 A EP 90115906A EP 90115906 A EP90115906 A EP 90115906A EP 0415222 B1 EP0415222 B1 EP 0415222B1
Authority
EP
European Patent Office
Prior art keywords
fineness
yarn
measured values
response limits
distribution
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.)
Expired - Lifetime
Application number
EP90115906A
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German (de)
English (en)
French (fr)
Other versions
EP0415222A3 (en
EP0415222A2 (de
Inventor
Kurt Aeppli
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.)
Zellweger Luwa AG
Original Assignee
Zellweger Luwa AG
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Filing date
Publication date
Application filed by Zellweger Luwa AG filed Critical Zellweger Luwa AG
Publication of EP0415222A2 publication Critical patent/EP0415222A2/de
Publication of EP0415222A3 publication Critical patent/EP0415222A3/de
Application granted granted Critical
Publication of EP0415222B1 publication Critical patent/EP0415222B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B65H63/062—Electronic slub detector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a method for setting the response limit of electronic yarn cleaners taking into account the fineness or number of the yarn to be cleaned, the fineness being measured during the cleaning process and the result of this measurement being compared with set tolerance limits (DE-A-28 20 097).
  • the present invention now has the task of eliminating the risk of confusion on the one hand and, on the other hand, of enabling the response limits to be optimally set on the basis of the actual production conditions. In addition, the operation should be simplified.
  • the method according to the invention thus enables the response limits to be set automatically, this setting being optimized so that only a predetermined number of false alarms occur. A mix-up of yarns of different fineness is excluded and there is an additional advantage that any tolerances of the control devices are also taken into account.
  • Fig. 1 shows a block diagram of a yarn cleaning system used on winding machines.
  • Each of these winding machines has a number of winding units, which are combined in sections, of which two, SM1 and SM2, are symbolically indicated in the figure.
  • Each winding unit is equipped with a sensor 1 for monitoring the yarn count and with an actuator 2 for triggering an operation triggered by the measurement signal of the associated sensor 1.
  • the yarn count signals GF of the sensors 1 are routed to a central signal processing unit 5, for example to the USTER POLYMATIC central unit, via multiplexers 3 and a bus 4.
  • the output signals of the central signal processing 5 reach the corresponding actuators 2 via the bus 4 and a demultiplexer 6.
  • the central signal processing 5 contains an A / D converter 7, into which the yarn count signals GF from the sensors 1 (FIG. 1) arrive.
  • the digitized yarn count signals GF ⁇ arrive in comparators 8, where they are compared with an upper and a lower limit value.
  • comparators 8 of this type are provided, which determine the limits within which the signal of each sensor 1 lies and then pass the respective fineness signal on to a counter 9 assigned to the relevant cross-sectional class.
  • each signal received by one of the comparators 8 is counted as an event, so that the counter readings of all counters 9 indicate a histogram of the fineness distribution of the threads of all winding positions.
  • the mean and standard deviation are calculated in a statistical stage 10 using the methods of statistics.
  • the mean value MW calculated in this way arrives in an addition and subtraction stage 11 or 12.
  • the standard deviation SA arrives at one input of a multiplication stage 13, at the other input of which the output signal of an input stage 14 for the input of the permissible ones Alarms per thread length defining size N.
  • N There is a relationship between this quantity N and the alarm frequency, assuming a normal distribution due to the usual fluctuations in production. This relationship is such that an alarm frequency of one percent is represented by a value of 2.58 and an alarm frequency of one per thousand by a value of 3.29 for the size N.
  • the product N times SA, ie alarm frequency times standard deviation is thus formed in multiplication stage 13.
  • the output signal of the multiplication stage 13, that is to say the product mentioned, is now fed to the addition and subtraction stage 11 and 12, the output signal of which indicates the upper and lower limit values GO and GU of the fineness. These limit values are thus obtained by adding and subtracting the product N times the standard deviation to or from the mean MW.
  • the central signal processing unit 5 sends a signal to the demultiplexer 6, which controls the corresponding actuator 2, causing the Production has stopped until the error has been rectified.
  • the response limits that is to say the limit values GO and GU, are determined independently on the basis of the measured fineness distribution and the predetermined permissible alarm frequency N. Measured values lying outside the alarm limits, that is to say those measured values which lead to the activation of the relevant actuator 2, are not taken into account for the statistics.
  • a certain number of, for example, 100 basic measured values must be available.
  • these basic values are determined for each new cop or after a thread break, i.e. when the production site is started or restarted.
  • the mean value and standard deviation are then determined from these basic measured values.
  • the described method leads to an optimal, automatic setting of the response limits on the basis of the actual circumstances, only a predetermined number of false alarms occurring and this number forming the basis for the setting of the response limits. This results in an optimum between defects which remain in the yarn and those which are removed and also lead to disruptive production downtimes and knots.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
EP90115906A 1989-08-31 1990-08-20 Verfahren zum Einstellen der Ansprechgrenze elektronischer Garnreiniger Expired - Lifetime EP0415222B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3154/89 1989-08-31
CH3154/89A CH681462A5 (enrdf_load_stackoverflow) 1989-08-31 1989-08-31

Publications (3)

Publication Number Publication Date
EP0415222A2 EP0415222A2 (de) 1991-03-06
EP0415222A3 EP0415222A3 (en) 1991-08-21
EP0415222B1 true EP0415222B1 (de) 1996-11-27

Family

ID=4249782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90115906A Expired - Lifetime EP0415222B1 (de) 1989-08-31 1990-08-20 Verfahren zum Einstellen der Ansprechgrenze elektronischer Garnreiniger

Country Status (7)

Country Link
US (1) US5181374A (enrdf_load_stackoverflow)
EP (1) EP0415222B1 (enrdf_load_stackoverflow)
JP (1) JP3038663B2 (enrdf_load_stackoverflow)
CH (1) CH681462A5 (enrdf_load_stackoverflow)
DE (1) DE59010578D1 (enrdf_load_stackoverflow)
ES (1) ES2094133T3 (enrdf_load_stackoverflow)
RU (1) RU1836280C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10129201A1 (de) * 2001-06-18 2002-12-19 Rieter Ingolstadt Spinnerei Eigenoptimierung für fadenführende Maschinen

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH683350A5 (de) * 1991-09-11 1994-02-28 Peyer Ag Siegfried Verfahren und Vorrichtung zum Klassifizieren und Reinigen von Garnen.
JP2626465B2 (ja) * 1993-04-27 1997-07-02 村田機械株式会社 糸監視器の診断方法及び同装置
US6130746A (en) * 1994-03-10 2000-10-10 Lawson-Hemphill, Inc. System and method for electronically evaluating predicted fabric qualities
DE4417357C2 (de) * 1994-05-18 2003-10-30 Buehler Ag Verfahren und Vorrichtung zur Reinigung von Teigwarenpressen
DE19547544A1 (de) * 1995-12-20 1997-06-26 Schlafhorst & Co W Verfahren zum Überprüfen des Fadenprofils
EP0877108B1 (de) * 1997-04-23 2003-07-16 Uster Technologies AG Verfahren und Vorrichtung zum Reinigen von Garnen
EP0990993A1 (en) * 1998-07-28 2000-04-05 Bull S.A. Event counter
US7035772B2 (en) * 2001-05-31 2006-04-25 International Business Machines Corporation Method and apparatus for calculating data integrity metrics for web server activity log analysis
GB0120771D0 (en) * 2001-08-25 2001-10-17 Fibrevision Ltd Yarn monitoring
JP2007224452A (ja) * 2006-02-23 2007-09-06 Murata Mach Ltd 異常錘特定装置および紡績機
CH701957A8 (de) * 2009-10-02 2011-11-15 Uster Technologies Ag Verfahren zum Festlegen einer Reinigungsgrenze auf einer Garnreinigungsanlage.
US9951445B2 (en) 2012-08-23 2018-04-24 Columbia Insurance Company Systems and methods for improving and controlling yarn texture
US9896786B2 (en) 2012-08-23 2018-02-20 Columbia Insurance Company Systems and methods for improving and controlling yarn texture
US10246292B2 (en) * 2013-10-01 2019-04-02 Maschinenfabrik Rieter Ag Yarn clearer and spinning station, equipped therewith, of a spinning machine, and method for operating a spinning station
JP2019137537A (ja) * 2018-02-14 2019-08-22 村田機械株式会社 クリアリングリミット設定装置及び糸巻取機

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA806872A (en) * 1969-02-25 Felix Ernst Apparatus and method for reducing the number of unnecessary cuts of yarn
CH402461A (de) * 1962-07-23 1965-11-15 Peyer Siegfried Elektro-optischer Fadenreiniger
CH466108A (de) * 1968-01-31 1968-11-30 Loepfe Ag Geb Verfahren und Vorrichtung zur Bestimmung der Reinigungswirkung eines elektronischen Fadenreinigers an Textilfaden-Spulmaschinen
US3643882A (en) * 1970-03-09 1972-02-22 Lessona Corp Yarn handling
CH527761A (de) * 1971-02-19 1972-09-15 Zellweger Uster Ag Schaltungseinrichtung zur automatischen Anpassung des Verstärkungsgrades von Garnreinigern an einen vorgehbaren Sollwert, an einer aus mindestens zwei elektronischen Garnreinigern bestehenden Anordnung
CH561655A5 (enrdf_load_stackoverflow) * 1973-02-05 1975-05-15 Loepfe Ag Geb
JPS49122382A (enrdf_load_stackoverflow) * 1973-03-22 1974-11-22
CH571453A5 (enrdf_load_stackoverflow) * 1974-05-15 1976-01-15 Loepfe Ag Geb
DE2437485A1 (de) * 1974-08-03 1976-02-12 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zum ueberwachen der arbeitsweise von faeden liefernden textilmaschinen
US4184769A (en) * 1975-01-24 1980-01-22 Zellweger Uster, Ltd. Determination of yarn defects
JPS51116255A (en) * 1975-04-07 1976-10-13 Asahi Chemical Ind Tester for yarn quality
CH618944A5 (en) * 1977-03-18 1980-08-29 Loepfe Ag Geb Method for determining periodic fluctuations of a signal, particularly of a textile thread scanning signal.
DE2820097C3 (de) * 1977-05-23 1980-02-28 Gebrueder Loepfe Ag, Wetzikon (Schweiz) Verfahren zur Bestimmung der Häufigkeit von Garnfehlern
CH620655A5 (enrdf_load_stackoverflow) * 1977-06-17 1980-12-15 Loepfe Ag Geb
CH635299A5 (de) * 1979-03-26 1983-03-31 Mayer Stephan Verfahren und vorrichtung zum messen der laenge eines von einem spinnkops oder von einer in wilder wicklung bewickelten garnspule ueber kopf abgezogenen fadens.
JPS5862511A (ja) * 1981-10-09 1983-04-14 Murata Mach Ltd 糸ムラ情報の解析方法および解析装置
JPS5879574A (ja) * 1981-11-02 1983-05-13 村田機械株式会社 ワインダ−の不良パツケ−ジ選別装置
IT1185450B (it) * 1985-10-16 1987-11-12 Nuovo Pignone Spa Stribbia ottica perfezionata,particolarmente adatta per open-end
CH675305A5 (enrdf_load_stackoverflow) * 1987-10-06 1990-09-14 Zellweger Uster Ag
US5119308A (en) * 1988-08-26 1992-06-02 Murata Kikai Kabushiki Kaisha Control system for spinning machine
CH681077A5 (enrdf_load_stackoverflow) * 1988-10-25 1993-01-15 Zellweger Uster Ag
JP5942801B2 (ja) 2012-11-13 2016-06-29 株式会社デンソー ワーク搬送装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10129201A1 (de) * 2001-06-18 2002-12-19 Rieter Ingolstadt Spinnerei Eigenoptimierung für fadenführende Maschinen

Also Published As

Publication number Publication date
EP0415222A3 (en) 1991-08-21
CH681462A5 (enrdf_load_stackoverflow) 1993-03-31
JPH0390639A (ja) 1991-04-16
JP3038663B2 (ja) 2000-05-08
EP0415222A2 (de) 1991-03-06
US5181374A (en) 1993-01-26
DE59010578D1 (de) 1997-01-09
RU1836280C (ru) 1993-08-23
ES2094133T3 (es) 1997-01-16

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