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EP0340756A1 - Method and device for monitoring the levelling of at least one sliver in a controlled drafting arrangement - Google Patents

Method and device for monitoring the levelling of at least one sliver in a controlled drafting arrangement Download PDF

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Publication number
EP0340756A1
EP0340756A1 EP89108023A EP89108023A EP0340756A1 EP 0340756 A1 EP0340756 A1 EP 0340756A1 EP 89108023 A EP89108023 A EP 89108023A EP 89108023 A EP89108023 A EP 89108023A EP 0340756 A1 EP0340756 A1 EP 0340756A1
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EP
European Patent Office
Prior art keywords
limit value
controller
measuring element
regulating
working range
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
EP89108023A
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German (de)
French (fr)
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EP0340756B1 (en
Inventor
Herbert König
Gerhard Stähle
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Truetzschler GmbH and Co KG
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Truetzschler GmbH and Co KG
Zinser Textilmaschinen GmbH
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Application filed by Truetzschler GmbH and Co KG, Zinser Textilmaschinen GmbH filed Critical Truetzschler GmbH and Co KG
Publication of EP0340756A1 publication Critical patent/EP0340756A1/en
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    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/32—Regulating or varying draft
    • D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities

Definitions

  • the invention relates to a method and a device for monitoring the equalization of at least one fiber structure in a regulating drafting system, in particular in a draw frame, wherein deviations in the mass of the fiber structure are detected by at least one measuring element and compensated for by a controller and at least one actuator.
  • regulating drafting devices have a regulating system for comparing fiber bundles, which detects and compensates for deviations in the mass of the fiber bundle from a desired value over short lengths.
  • This control system can be designed as a regulation or as a controller.
  • the regulating drafting units often have a further regulating system which records deviations over long lengths and essentially serves to keep numbers. This regulation system is always designed as a regulation.
  • the elements of these regulating systems can be subject to malfunctions which not only do not make the fiber structure uniform, but which even deteriorate the uniformity of the fiber structure. Such malfunctions are not readily recognizable with the help of previously known devices and methods and lead in particular to routes with their high level Material throughput quickly to large quantities of defective products.
  • the invention has for its object to provide a method and an apparatus in which such malfunctions can be identified in a simple manner and thus the operation of regulating systems can be better monitored.
  • the measured values of the measuring element and / or the control signals of the controller are compared with at least one adjustable limit value, a display and / or switching process being triggered when the limit value is exceeded.
  • the limit value is advantageously chosen so that it will not be reached in the normal operation of the regulating device. On the other hand, exceeding this draws the operator's attention to a possible malfunction of the regulating system or the measuring element.
  • the limit is chosen to be only slightly higher than the values which occur during normal operation, it is generally sufficient to draw the operator's attention to the signal. If, on the other hand, a significantly higher limit value is provided, it is advantageous to switch off the machine when it is exceeded. Both of the aforementioned limit values can also be monitored simultaneously.
  • the operator must check the feed belt: If its unevenness is greater than normal, the operation of the upstream machines must be checked. On the other hand, if the unevenness of the original material is normal, there is suspicion of malfunction of the regulating device and / or the measuring elements.
  • the fiber structure delivered by the regulating drafting device must be checked. If its mass fluctuation lies within the intended limit values, there is suspicion of a malfunction of the measuring element that detects long-period fluctuations - it thus indicates a deviation, which obviously does not exist. If, on the other hand, the intended limit values of the unevenness in the fiber structure are actually exceeded, there is suspicion of malfunction of the regulating system and / or of the measuring element that detects short-term fluctuations.
  • a regulating drafting system has two schematically illustrated roller pairs 1 and 2, which are each driven by drive motors 7 and 9 and drive shafts 6 and 8.
  • a fiber structure 3 runs through the two pairs of rollers 1 and 2.
  • the roller pairs 1 and 2 are preceded by a short-time measuring element 4, which is connected to a controller 10 via a line 15.
  • This controller 10 is connected via a line 21 to the drive 9 and Via lines 18 and 20 with the drive 7 in operative connection.
  • the measured values of the measuring element 4 control the controller 10 in a manner known per se so that it influences the speed of the drive motor 9 of the pair of rollers 1 via line 21 in the sense of reducing a deviation of the fiber structure 3 determined by the measuring element 4 from the predetermined target value.
  • a long-term measuring element 5 is arranged behind the roller pairs 1 and 2 in the area of the fiber structure 3, which is connected to the controller 10 via lines 16 and 17. As described above for the measuring element 4, the measuring element 5 also influences the delivery speed of the pair of rollers by means of the controller 10 in the sense of reducing a detected strip weight deviation.
  • the measuring element 5 is connected via the line 16 to an actual-target comparison point 12, which is connected via a line 19 to an adjusting device 13 for the limit value range, as well as a setting switch 11 and a display device 14.
  • the measured values of the measuring element 5 are compared with the set limit value of the setting device 13, the display device 14 or a switching operation of the switching mechanism 11 being triggered when the limit value is exceeded, as a result of which the drives 7 and 9 are switched off.
  • the limit value set by the setting device 13 is exceeded, an operator is made aware of a possible malfunction of the regulating system or the measuring elements 4 or 5.
  • the limit value defined by the setting device 13 is only slightly higher than the normal value, it is sufficient if the signal lamp 14 lights up. If, on the other hand, a significantly higher limit value is provided, it is expedient to shut down the drives 7 and 9 of the regulating drafting device via the setting switch 11 in order to prevent the delivery of defective strip.
  • the line 21 between the controller 10 and the drive motor 9 is connected via a line 22 to an adjusting device 13 ⁇ for a wide limit range and a setting switch 11. Another connection is made via line 23 to a further adjusting device 13 'for a narrower area, this adjusting device 13 being connected to a signal lamp 14.
  • the control signal emitted by the controller 10 exceeds the limit set on the adjusting device 13 ', the normal working range of the control signals of the controller 10, the signal lamp 14 lights up. If, on the other hand, the limit value set on the adjusting device 13 ', the normal working range of the actuating signals is exceeded, the drive motors 9 and 7 of the roller pairs 1 and 2 are separated from the mains by the adjusting switch 11 and stopped.
  • the operator must first check the supply belt 3 (arrow II). If the unevenness is greater than normal, the operation of the upstream machine must be checked. If, on the other hand, the unevenness of the original material is normal, there is suspicion of malfunction of the controller 10 or the measuring element 4.
  • FIG. 2 can be simplified in that only one adjusting device 13 analogous to the embodiment according to FIG. 1 is used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

The invention relates to a method and a device for monitoring the levelling of at least one sliver 3 in a controlled drafting arrangement, especially a drafting frame, deviations in the mass of the sliver 3 being detected by at least one measuring element 4, 5 and being compensated via a controller 10 and at least one actuator. According to the invention, the measurement values of the measuring element 4, 5 and/or the regulating signals of the controller 10 are compared with at least one adjustable limit value, and when the limit value is exceeded an indicator 14 and/or a switching operation is triggered. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zur Überwachung des Vergleichmäßigens mindestens eines Faserverbandes in einem Regulierstreckwerk, insbesondere in einer Strecke, wobei Abweichungen der Masse des Faserverbandes durch mindestens ein Meßglied erfaßt und über einen Regler und mindestens ein Stellglied ausgeglichen werden.The invention relates to a method and a device for monitoring the equalization of at least one fiber structure in a regulating drafting system, in particular in a draw frame, wherein deviations in the mass of the fiber structure are detected by at least one measuring element and compensated for by a controller and at least one actuator.

Bei dem allgemein bekannten Stand der Technik weisen Regu­lierstreckwerke zum Vergleichmäßigen von Faserverbänden ein Reguliersystem auf, welches Abweichungen der Masse des Fa­serverbandes von einem Sollwert auf kurze Längen erfaßt und ausgleicht. Dieses Regelsystem kann als Regelung oder als Steuerung ausgebildet sein. Daneben weisen die Regulier­streckwerke häufig ein weiteres Reguliersystem auf, das Ab­weichungen auf großen Längen erfaßt und im wesentlichen zur Nummernhaltung dient. Dieses Reguliersystem ist stets als Regelung ausgebildet.In the generally known state of the art, regulating drafting devices have a regulating system for comparing fiber bundles, which detects and compensates for deviations in the mass of the fiber bundle from a desired value over short lengths. This control system can be designed as a regulation or as a controller. In addition, the regulating drafting units often have a further regulating system which records deviations over long lengths and essentially serves to keep numbers. This regulation system is always designed as a regulation.

Die Elemente dieser Reguliersysteme, wie beispielsweise Meß­glieder, Regler und Stellglied, können Fehlfunktionen unter­worfen sein, durch die nicht nur keine Vergleichmäßigung des Faserverbandes erzielt wird, sondern durch welche sogar die Gleichmäßigkeit des Faserverbandes eine Verschlechterung er­fährt. Derartige Fehlfunktionen sind mit Hilfe bisher be­kannter Vorrichtungen und Verfahren nicht ohne weiteres er­kennbar und führen insbesondere an Strecken mit deren hohem Materialdurchsatz rasch zu großen Mengen fehlerhafter Pro­dukte.The elements of these regulating systems, such as measuring elements, regulators and final control elements, can be subject to malfunctions which not only do not make the fiber structure uniform, but which even deteriorate the uniformity of the fiber structure. Such malfunctions are not readily recognizable with the help of previously known devices and methods and lead in particular to routes with their high level Material throughput quickly to large quantities of defective products.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zu schaffen, bei welcher derartige Fehlfunktionen auf einfache Weise erkennbar sind und damit die Arbeitsweise von Reguliersystemen besser überwacht werden kann.The invention has for its object to provide a method and an apparatus in which such malfunctions can be identified in a simple manner and thus the operation of regulating systems can be better monitored.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Meßwerte des Meßgliedes und/oder die Stellsignale des Reg­lers mit mindestens einem einstellbaren Grenzwert verglichen werden, wobei bei Grenzwertüberschreitung eine Anzeige und/oder Schaltvorgang ausgelöst wird. Hierbei wird vorteil­hafterweise der Grenzwert so gewählt, daß er bei normaler Arbeitsweise der Reguliervorrichtung nicht erreicht werden wird. Seine Überschreitung macht dagegen die Bedienungsper­son auf eine mögliche Fehlfunktion des Reguliersystems bzw. des Meßgliedes aufmerksam.This object is achieved in that the measured values of the measuring element and / or the control signals of the controller are compared with at least one adjustable limit value, a display and / or switching process being triggered when the limit value is exceeded. In this case, the limit value is advantageously chosen so that it will not be reached in the normal operation of the regulating device. On the other hand, exceeding this draws the operator's attention to a possible malfunction of the regulating system or the measuring element.

Wenn der Grenzwert nur wenig höher gewählt wird, als die bei normalem Betrieb auftretenden Werte, ist es im allgemeinen ausreichend, durch das Signal die Bedienungsperson aufmerk­sam zu machen. Wenn dagegen ein wesentlich höherer Grenzwert vorgesehen wird, ist es vorteilhaft, die Maschine bei dessen Überschreiten abzustellen. Es können auch beide vorgenannten Grenzwerte gleichzeitig überwacht werden.If the limit is chosen to be only slightly higher than the values which occur during normal operation, it is generally sufficient to draw the operator's attention to the signal. If, on the other hand, a significantly higher limit value is provided, it is advantageous to switch off the machine when it is exceeded. Both of the aforementioned limit values can also be monitored simultaneously.

Bei Überschreiten des eingestellten Grenzwertes für das Stellsignal muß die Bedienungsperson das Vorlageband über­prüfen: Wenn seine Ungleichmäßigkeit größer ist als normal, muß die Arbeitsweise der vorgeschalteten Maschinen überprüft werden. Wenn dagegen die Ungleichmäßigkeit des Vorlagemate­rials normal ist, besteht Verdacht auf Fehlfunktion der Re­guliervorrichtung und/oder der Meßglieder.If the set limit value for the control signal is exceeded, the operator must check the feed belt: If its unevenness is greater than normal, the operation of the upstream machines must be checked. On the other hand, if the unevenness of the original material is normal, there is suspicion of malfunction of the regulating device and / or the measuring elements.

Entsprechend ist bei einem Überschreiten des vorgesehenen Grenzwertes durch das langperiodische Schwankungen des Fa­serverbandes erfassenden Meßgliedes der vom Regulierstreck­werk abgelieferte Faserverband zu überprüfen. Wenn seine Masseschwankung innerhalb der vorgesehenen Grenzwerte liegt, besteht Verdacht auf Fehlfunktion des langperiodische Schwankungen erfassenden Meßgliedes - es zeigt damit eine Abweichung an, welche ersichtlich nicht gegeben ist. Wenn dagegen die vorgesehenen Grenzwerte der Ungleichmäßigkeit im Faserverband tatsächlich überschritten sind, besteht Ver­dacht auf Fehlfunktion des Reguliersystems und/oder des kurzzeitige Schwankungen erfassenden Meßgliedes.Correspondingly, if the intended limit value is exceeded due to the measuring element detecting long-period fluctuations in the fiber structure, the fiber structure delivered by the regulating drafting device must be checked. If its mass fluctuation lies within the intended limit values, there is suspicion of a malfunction of the measuring element that detects long-period fluctuations - it thus indicates a deviation, which obviously does not exist. If, on the other hand, the intended limit values of the unevenness in the fiber structure are actually exceeded, there is suspicion of malfunction of the regulating system and / or of the measuring element that detects short-term fluctuations.

Die Erfindung wird nachfolgend anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher beschrieben. In der Zeichnung zeigen:

  • Fig. 1 und 2 zwei schematische Seitenansichten eines Regulier­systems mit Vorrichtungen zur Überwachung des Ver­gleichmäßigens mindestens eines Faserverbandes.
The invention is described below with reference to exemplary embodiments shown in the drawing. The drawing shows:
  • 1 and 2 show two schematic side views of a regulating system with devices for monitoring the uniformity of at least one fiber structure.

Nach Fig. 1 weist ein Regulierstreckwerk zwei schematisch dargestellte Walzenpaare 1 und 2 auf, welche jeweils über Antriebsmotoren 7 und 9 und Antriebswellen 6 und 8 angetrie­ben werden. Durch die beiden Walzenpaare 1 und 2 läuft ein Faserverband 3.1, a regulating drafting system has two schematically illustrated roller pairs 1 and 2, which are each driven by drive motors 7 and 9 and drive shafts 6 and 8. A fiber structure 3 runs through the two pairs of rollers 1 and 2.

Bei der Ausführungsform nach Fig. 1 ist den Walzenpaaren 1 und 2 ein Kurzzeitmeßglied 4 vorgeschaltet, welches über eine Leitung 15 mit einem Regler 10 verbunden ist. Dieser Regler 10 steht über eine Leitung 21 mit dem Antrieb 9 und über Leitungen 18 und 20 mit dem Antrieb 7 in Wirkverbin­dung. Die Meßwerte des Meßgliedes 4 steuern den Regler 10 in an sich bekannter Weise so, daß er über die Leitung 21 die Drehzahl des Antriebsmotors 9 des Walzenpaares 1 im Sinne einer Verminderung einer vom Meßglied 4 ermittelten Abwei­chung des Faserverbandes 3 vom vorgegebenen Sollwert beein­flußt.In the embodiment according to FIG. 1, the roller pairs 1 and 2 are preceded by a short-time measuring element 4, which is connected to a controller 10 via a line 15. This controller 10 is connected via a line 21 to the drive 9 and Via lines 18 and 20 with the drive 7 in operative connection. The measured values of the measuring element 4 control the controller 10 in a manner known per se so that it influences the speed of the drive motor 9 of the pair of rollers 1 via line 21 in the sense of reducing a deviation of the fiber structure 3 determined by the measuring element 4 from the predetermined target value.

Weiterhin ist hinter den Walzenpaaren 1 und 2 ein Langzeit­meßglied 5 im Bereich des Faserverbandes 3 angeordnet, wel­ches über Leitungen 16 und 17 mit dem Regler 10 verbunden ist. Wie vorstehend für das Meßglied 4 beschrieben, beein­flußt so auch das Meßglied 5 über den Regler 10 die Liefer­geschwindigkeit des Walzenpaares im Sinne einer Verminderung einer festgestellten Bandgewichtsabweichung.Furthermore, a long-term measuring element 5 is arranged behind the roller pairs 1 and 2 in the area of the fiber structure 3, which is connected to the controller 10 via lines 16 and 17. As described above for the measuring element 4, the measuring element 5 also influences the delivery speed of the pair of rollers by means of the controller 10 in the sense of reducing a detected strip weight deviation.

Erfindungsgemäß ist das Meßglied 5 über die Leitung 16 mit einem Ist-Soll-Vergleichspunkt 12 verbunden, der über eine Leitung 19 mit einer Einstellvorrichtung 13 für den Grenz­wertbereich, sowie einem Stellschalter 11 und einer Anzeige­vorrichtung 14 verbunden ist. Dadurch werden die Meßwerte des Meßgliedes 5 mit dem eingestellten Grenzwert der Ein­stellvorrichtung 13 verglichen, wobei bei Grenzwert­überschreitung die Anzeigevorrichtung 14 oder ein Schaltvor­gang des Schaltwerkes 11 ausgelöst wird, wodurch die An­triebe 7 und 9 abgestellt werden. In diesem Fall ist zu überprüfen, ob bezüglich des Ausgabebandes der Toleranzbe­reich eingehalten wurde. Ist dies der Fall, so ist das Lang­zeitmeßsystem zu überprüfen (Pfeil I). Ist dies nicht der Fall, besteht Verdacht auf Fehlfunktion des Kurzzeitmeßglie­des 4 und/oder des Reglers 10, die dann zu überprüfen sind. Bei Überschreitung des durch die Einstellvorrichtung 13 ein­gestellten Grenzwertes wird also eine Bedienungsperson auf eine mögliche Fehlfunktion des Reguliersystems bzw. der Meß­glieder 4 oder 5 aufmerksam gemacht.According to the invention, the measuring element 5 is connected via the line 16 to an actual-target comparison point 12, which is connected via a line 19 to an adjusting device 13 for the limit value range, as well as a setting switch 11 and a display device 14. As a result, the measured values of the measuring element 5 are compared with the set limit value of the setting device 13, the display device 14 or a switching operation of the switching mechanism 11 being triggered when the limit value is exceeded, as a result of which the drives 7 and 9 are switched off. In this case, check whether the tolerance range for the output belt has been observed. If this is the case, the long-term measuring system must be checked (arrow I). If this is not the case, there is suspicion of malfunction of the short-term measuring element 4 and / or the controller 10, which must then be checked. If the limit value set by the setting device 13 is exceeded, an operator is made aware of a possible malfunction of the regulating system or the measuring elements 4 or 5.

Liegt hierbei der durch die Einstellvorrichtung 13 defi­nierte Grenzwert nur wenig höher als der Normalwert, genügt es, wenn die Signallampe 14 aufleuchtet. Ist dagegen ein we­sentlich höherer Grenzwert vorgesehen, ist es zweckmäßig, über den Stellschalter 11 die Antriebe 7 und 9 des Regulier­streckwerkes stillzusetzen, um das Abliefern fehlerhaften Bandes zu verhindern.If the limit value defined by the setting device 13 is only slightly higher than the normal value, it is sufficient if the signal lamp 14 lights up. If, on the other hand, a significantly higher limit value is provided, it is expedient to shut down the drives 7 and 9 of the regulating drafting device via the setting switch 11 in order to prevent the delivery of defective strip.

Bei der Ausführungsform nach Fig. 2 ist die Leitung 21 zwi­schen Regler 10 und Antriebsmotor 9 über eine Leitung 22 mit einer Einstellvorrichtung 13˝ für einen weiten Grenzwertbe­reich und einem Stellschalter 11 verbunden. Eine weitere Verbindung besteht über die Leitung 23 mit einer weiteren Einstellvorrichtung 13′ für einen engeren Bereich, wobei diese Einstellvorrichtung 13 mit einer Signallampe 14 ver­bunden ist.In the embodiment according to FIG. 2, the line 21 between the controller 10 and the drive motor 9 is connected via a line 22 to an adjusting device 13˝ for a wide limit range and a setting switch 11. Another connection is made via line 23 to a further adjusting device 13 'for a narrower area, this adjusting device 13 being connected to a signal lamp 14.

Wenn das vom Regler 10 abgegebene Stellsignal den an der Einstellvorrichtung 13′ eingestellten, dem normalen Arbeits­bereich der Stellsignale des Reglers 10 näheren Grenzwert überschreitet, leuchtet die Signallampe 14 auf. Wenn dagegen der an der Einstellvorrichtung 13′ eingestellte, dem norma­len Arbeitsbereich der Stellsignale fernere Grenzwert über­schritten wird, werden die Antriebsmotoren 9 und 7 der Wal­zenpaare 1 und 2 durch den Stellschalter 11 vom Netz ge­trennt und stillgesetzt.When the control signal emitted by the controller 10 exceeds the limit set on the adjusting device 13 ', the normal working range of the control signals of the controller 10, the signal lamp 14 lights up. If, on the other hand, the limit value set on the adjusting device 13 ', the normal working range of the actuating signals is exceeded, the drive motors 9 and 7 of the roller pairs 1 and 2 are separated from the mains by the adjusting switch 11 and stopped.

In beiden Fällen muß die Bedienungsperson zunächst das Vor­lageband 3 überprüfen (Pfeil II). Ist die Ungleichmäßigkeit größer als normal, muß die Arbeitsweise der vorgeschalteten Maschine überprüft werden. Wenn dagegen die Ungleichmäßig­keit des Vorlagematerials normal ist, besteht Verdacht auf Fehlfunktion des Reglers 10 oder des Meßgliedes 4.In both cases, the operator must first check the supply belt 3 (arrow II). If the unevenness is greater than normal, the operation of the upstream machine must be checked. If, on the other hand, the unevenness of the original material is normal, there is suspicion of malfunction of the controller 10 or the measuring element 4.

Es besteht auch die nicht näher dargestellte Möglichkeit, die Ausführungsformen nach Figur 1 und 2 sinngemäß zu kombi­nieren und die Verfahren gleichzeitig durchzuführen.There is also the possibility, not shown in any more detail, of combining the embodiments according to FIGS. 1 and 2 analogously and of carrying out the methods simultaneously.

Bei der in Fig. 1 dargestellten Ausführungsform besteht dar­überhinaus die Möglichkeit, analog der Ausführungsform nach Fig. 2 zwei Einstellvorrichtungen 13′ und 13˝ für zwei un­terschiedliche Grenzwerte einzusetzen.In the embodiment shown in Fig. 1 there is also the possibility, analogous to the embodiment of FIG. 2, to use two setting devices 13 'and 13˝ for two different limit values.

Umgekehrt kann die Ausführungsform nach Fig. 2 dadurch ver­einfacht werden, daß nur eine Einstellvorrichtung 13 analog der Ausführungsform nach Fig. 1 eingesetzt wird.Conversely, the embodiment according to FIG. 2 can be simplified in that only one adjusting device 13 analogous to the embodiment according to FIG. 1 is used.

Insgesamt wird durch die Erfindung bewirkt, daß die Arbeits­weise der Reguliersysteme auf einfache Weise eine Überwa­chung erfährt, wobei Fehlfunktionen rechtzeitig erkannt und damit die Herstellung fehlerhafter Produkte wirksam vermie­den werden.Overall, the invention has the effect that the mode of operation of the regulating systems is monitored in a simple manner, malfunctions being recognized in good time and thus the manufacture of defective products being effectively avoided.

Claims (7)

1. Verfahren zur Überwachung des Vergleichmäßigens minde­stens eines Faserverbandes in einem Regulierstreckwerk, insbesondere in einer Strecke, wobei Abweichungen der Masse des Faserverbandes durch mindestens ein Meßglied erfaßt und über einen Regler und mindestens ein Stell­glied ausgeglichen werden, dadurch gekennzeichnet, daß
die Meßwerte des Meßgliedes (4, 5) und/oder die Stell­signale des Reglers (10) mit mindestens einem einstell­baren Grenzwert verglichen werden und bei Grenzwertüber­schreitung eine Anzeige (14) und/oder ein Schaltvorgang ausgelöst wird.1. A method for monitoring the comparison of at least one fiber structure in a regulating drafting system, in particular in a draw frame, deviations in the mass of the fiber structure being detected by at least one measuring element and compensated for by a controller and at least one actuator, characterized in that
the measured values of the measuring element (4, 5) and / or the control signals of the controller (10) are compared with at least one adjustable limit value and a display (14) and / or a switching process is triggered if the limit value is exceeded. 2. Verfahren nach Anspruch 1, gekennzeichnet durch Ver­gleich der Stellsignale der Reguliervorrichtung mit dem jeweiligen einstellbaren Grenzwert.2. The method according to claim 1, characterized by comparing the control signals of the regulating device with the respective adjustable limit value. 3. Verfahren nach Anspruch 1, gekennzeichnet durch Vergleich der Meßwerte eines der Regelstrecke nachgeordneten Meß­gliedes (5) mit dem jeweiligen einstellbaren Grenzwert.3. The method according to claim 1, characterized by comparing the measured values of a measuring element downstream of the controlled system (5) with the respective adjustable limit value. 4. Verfahren nach Anspruch 2 oder 3, gekennzeichnet durch einen dem Arbeitsbereich des Reglers (10) bzw. des Meß­gliedes (4, 5) näheren, und einen dem Arbeitsbereich des Reglers (10) bzw. des Meßgliedes (4, 5) ferneren Grenz­wert.4. The method according to claim 2 or 3, characterized by a working range of the controller (10) or the measuring element (4, 5) closer, and a working range of the controller (10) or the measuring element (4, 5) farther limit . 5. Vorrichtung zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Ausgang des Reglers (10) über einen IST/SOLL-Ver­gleichspunkt (12) mit mindestens einem Grenzwertgeber (13; 13′; 13˝) und mit einer Anzeigevorrichtung (14) und/oder mit einem Stellschalter (11) verbunden ist.5. Device for performing the method according to one of the preceding claims, characterized in that the output of the controller (10) via an ACTUAL / TARGET comparison point (12) with at least one limit indicator (13; 13 '; 13˝) and with one Display device (14) and / or with a control switch (11) is connected. 6. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Ausgang eines der Regelstrecke nachgeordneten Meßgliedes (5) über einen IST/SOLL-Vergleichspunkt (12) mit minde­stens einem Grenzwertgeber (13) und mit einer Anzeige­vorrichtung (14) und/oder mit einem Stellschalter (11) verbunden ist.6. Device for performing the method according to one of claims 1 to 4, characterized in that the output of a measuring element downstream of the controlled system (5) via an ACTUAL / TARGET comparison point (12) with at least one limit value transmitter (13) and with a display device (14) and / or with a control switch (11). 7. Vorrichtung nach den Ansprüchen 5 oder 6, dadurch gekenn­zeichnet, daß der Grenzwertgeber (13′; 13˝) zur Vorgabe zweier voneinander unabhängig einstellbarer Grenzwerte ausgebildet ist, von denen ein dem Arbeitsbereich des Reglers (10) bzw. des Meßgliedes (4, 5) näherliegender Grenzwert zum Aktivieren einer Anzeigevorrichtung (14) und ein dem Arbeitsbereich des Reglers (10) fernerliegen­der Grenzwert zum Aktivieren eines Stellschalters (11) vorgesehen ist.7. Device according to claims 5 or 6, characterized in that the limit value transmitter (13 '; 13˝) is designed to specify two independently adjustable limit values, one of which is the working range of the controller (10) or the measuring element (4, 5) closer limit value for activating a display device (14) and a limit value further away from the working range of the controller (10) is provided for activating a setting switch (11).
EP89108023A 1988-05-04 1989-05-03 Method and device for monitoring the levelling of at least one sliver in a controlled drafting arrangement Expired - Lifetime EP0340756B1 (en)

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DE3815200A DE3815200C2 (en) 1988-05-04 1988-05-04 Method and device for monitoring the uniformity of at least one fiber structure in a regulating drafting device
DE3815200 1988-05-04

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EP0340756A1 true EP0340756A1 (en) 1989-11-08
EP0340756B1 EP0340756B1 (en) 1991-12-04

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EP0464417A1 (en) * 1990-06-19 1992-01-08 Hoechst Aktiengesellschaft Method of monitoring the regularity of slivers
EP0477589A1 (en) * 1990-09-26 1992-04-01 Maschinenfabrik Rieter Ag Method for the correction of a determined measuring signal for the mass of a fiber band at an autolevellor for fiber bands with an outlet measuring device
EP0678601A2 (en) * 1990-06-25 1995-10-25 Maschinenfabrik Rieter Ag Controlled draw frame
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DE19537345A1 (en) * 1994-11-25 1996-05-30 Rieter Ag Maschf Spinning machine control
US6679043B2 (en) 2000-11-08 2004-01-20 Maschinenfabrik Reiter Ag Spinning machine

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DE4219777A1 (en) * 1992-06-17 1993-12-23 Rieter Ingolstadt Spinnerei Method and device for signal analysis of a regulating system
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EP0464417A1 (en) * 1990-06-19 1992-01-08 Hoechst Aktiengesellschaft Method of monitoring the regularity of slivers
EP0678601A2 (en) * 1990-06-25 1995-10-25 Maschinenfabrik Rieter Ag Controlled draw frame
EP0678601A3 (en) * 1990-06-25 1996-01-24 Rieter Ag Maschf Controlled draw frame.
US5509179A (en) * 1990-06-25 1996-04-23 Mondini; Giancarlo Autoleveller draw frame having process feed back control system
EP0477589A1 (en) * 1990-09-26 1992-04-01 Maschinenfabrik Rieter Ag Method for the correction of a determined measuring signal for the mass of a fiber band at an autolevellor for fiber bands with an outlet measuring device
US5394591A (en) * 1990-09-26 1995-03-07 Maschinenfabrik Rieter Ag Autoleveller drafting arrangement with mass fluctuation control
DE19537345A1 (en) * 1994-11-25 1996-05-30 Rieter Ag Maschf Spinning machine control
DE19537345C2 (en) * 1994-11-25 2000-05-25 Rieter Ag Maschf Method for controlling a spinning machine and associated spinning machine
US6679043B2 (en) 2000-11-08 2004-01-20 Maschinenfabrik Reiter Ag Spinning machine

Also Published As

Publication number Publication date
EP0340756B1 (en) 1991-12-04
DE58900523D1 (en) 1992-01-16
DE3815200A1 (en) 1989-11-16
DE3815200C2 (en) 1998-01-29

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