EP1091034A2 - Verfahren und Vorrichtung zum Selbstlernen der Position von elektromechanischen Stellgliedern, insbesonderes für Rundstrickmaschinen und dergleichen - Google Patents

Verfahren und Vorrichtung zum Selbstlernen der Position von elektromechanischen Stellgliedern, insbesonderes für Rundstrickmaschinen und dergleichen Download PDF

Info

Publication number
EP1091034A2
EP1091034A2 EP00121244A EP00121244A EP1091034A2 EP 1091034 A2 EP1091034 A2 EP 1091034A2 EP 00121244 A EP00121244 A EP 00121244A EP 00121244 A EP00121244 A EP 00121244A EP 1091034 A2 EP1091034 A2 EP 1091034A2
Authority
EP
European Patent Office
Prior art keywords
needle cylinder
actuators
encoder
zero position
actuator
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.)
Withdrawn
Application number
EP00121244A
Other languages
English (en)
French (fr)
Other versions
EP1091034A3 (de
Inventor
Paolo Brandani
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.)
Macchine Tessili Circolari MATEC SpA
Original Assignee
Macchine Tessili Circolari MATEC 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 Macchine Tessili Circolari MATEC SpA filed Critical Macchine Tessili Circolari MATEC SpA
Publication of EP1091034A2 publication Critical patent/EP1091034A2/de
Publication of EP1091034A3 publication Critical patent/EP1091034A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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 invention relates to a method for self-learning the position of electromechanical actuators, for performing particular kinds of knitting on circular knitting machines, in order to obtain particular types of pattern or mesh.
  • Insertion of one or more yarns in the knitting must occur in a synchronized fashion, in accordance with the intended type of knitting.
  • electronically-controlled needle selection devices must be timed or synchronized with respect to the needle cylinder so as to be able to select the intended needle in each instance.
  • This synchronization or timing is usually performed manually, with evident difficulty in synchronizing the electromechanical actuators with respect to the rotating needle cylinder.
  • the aim of the present invention is to provide a method for self-learning the position of electromechanical actuators, particularly for circular textile machines, which allows to automatically detect the angular position of the electromechanical actuators arranged around the rotating needle cylinder with respect to a reference point of said needle cylinder.
  • an object of the present invention is to provide a method for self-learning the position of electromechanical actuators in which said reference can be any point of the rotating cylinder.
  • Another object of the present invention is to provide a method for self-learning the position of electromechanical actuators which allows to use, as sensor, sensors which are typically already present in said circular machine.
  • Another object of the present invention is to provide a method for self-learning the position of electromechanical actuators which allows, after determining the positions of the axes of the actuators with respect to a reference point, to precisely generate the synchronization or timing signals for driving the electromagnets of the actuators, in order to achieve selection of the needles and thus provide a particular type of pattern or knitting.
  • Another object of the present invention is to provide a method for self-learning the position of electromechanical actuators which is highly reliable, relatively simple to provide and at competitive costs.
  • a method for self-learning the position of electromechanical actuators particularly for circular textile machines provided with a needle cylinder with multiple circumferentially arranged actuators for actuating heels of flexible elements arranged at each needle of the needle cylinder, each one of said actuators being provided with a plurality of levers which are actuated electronically, each one of said levers being suitable to pass from an inactive position to a position for engagement with a corresponding heel of said needle cylinder, characterized in that it comprises the steps that consist in:
  • FIG 1 illustrates an electromechanical actuator 1 which is formed by special electromagnets (not shown) which move upward and downward a plurality of levers 2.
  • Each lever can be moved and arranged downward by means of the activation of the corresponding electromagnet, and in this case makes mechanical contact with a heel 4 of a flexible element which is rigidly coupled to a rotating needle cylinder 3 of the machine.
  • Each flexible element is arranged at each needle of the cylinder.
  • the heels of the flexible elements are arranged sequentially at different heights, as shown in Figure 1, with the same center distance provided is between the levers 2 and with a modulus of repetition which is equal to the number of levers 2 of the actuator 1. In practice, one has a diagonal arrangement of the heels 4 of the flexible elements.
  • each lever 2 with a heel 4 is utilized to obtain an electrical contact as well.
  • the needle cylinder 3 is in fact typically in contact with the structure of the circular knitting machine and is therefore connected to the same electrical ground as the machine.
  • a single lever 2 is arranged downward and generates the electrical signal. The chosen lever must be the same for each actuator.
  • the actuator 1 is conveniently supported on an electrically insulating supporting element 6, which is meant to electrically insulate the actuator 1 from the electrical ground to which the machine is connected.
  • Each lever 2 by means of its metallic supporting systems, is in electrical contact with the body of the actuator 1, which is in turn connected to an input channel of an electronic unit 5 which controls the circular knitting machine.
  • each input to which each one of the actuators 1 makes contact with the electrical ground and, by means of appropriate electronic circuits, generates a digital signal which can have, for example, the following meaning:
  • Each actuator arranged around the needle cylinder 3 therefore acts as a sensor (or better still as a transducer) in order to generate an item of electrical information whenever it interferes mechanically with the heels 4 of the flexible elements that correspond to each needle of the cylinder 3.
  • Figure 2 is a plan view of the needle cylinder 3, connected to the electronic unit 5, on which multiple actuators, designated in this case by 1a...1n, are arranged radially, and with an encoder 8 which is rigidly coupled to the needle cylinder 3 and is in turn connected to the electronic unit 5.
  • the encoder 8 is of the incremental type and is characterized by a zero signal (encoder zero) which is generated only once per revolution, a signal ch1 and a signal ch2 which is generated, for each revolution, a number of times which is sufficient to obtain a resolution of a fraction of a degree on the position of the needle cylinder 3.
  • each actuator 1a...1n and the electronic unit 5 is of the bidirectional type, since the actuators receive from the electronic unit the control signals for the electromagnets which are rigidly coupled to the levers 2, and in turn send to the electronic unit, over the appropriately provided input channels designated by INPUT 1a...INPUT 1n, the information related to the operation of the actuators as sensors for detecting the position of the needle cylinder 3.
  • connection between the incremental encoder 8 and the electronic unit 5 is provided by means of a bus H which is meant to send to the electronic unit 5 the three signals of the encoder, i.e., the encoder zero signal, the Ch1 signal and the Ch2 signal.
  • the electronic unit 5 furthermore drives the motor of the needle cylinder 3, not shown in the figures.
  • the method for self-learning the position of the needle cylinder 3 is started by an appropriate command on the keyboard of the circular knitting machine and activates the following actions:
  • Figure 3 is a chart which plots the timings of the various signals.
  • this operation can occur in different manners, for example by adding appropriate sensors at a specific position on the needle cylinder 3 or by arranging the cylinder by manual rotation at a specific angle or by means of a procedure which allows to simplify the operation and have assurance of reliability.
  • This procedure entails, in a step which precedes the activation of the self-learning method, the removal of a heel 4 which corresponds to a reference position chosen by the operator.
  • the signals INPUT 1a... INPUT 1n obtained during the self-learning method have an evident gap, indicated by a dashed line in Figure 4, at the missing heel 4. Since the number of needles and therefore of flexible elements and heels is known for each circular knitting machine, since it is a design specification, and most of all since the number of needles that composes each diagonal is known, it is easy to determine the position of the missing heel 4 and accordingly it is also easy to calculate the angles a1, a2, a3...an between the zero of the encoder and the reference needle on the axis of each one of the actuators 1a...1n that are present. In practice, it is therefore possible to detect the absolute position of the actuators 1a...1n with respect to the zero of the encoder 8.
  • the self-learned positions of the axes of the actuators 1 with respect to the zero of the encoder 8 allow to precisely generate the synchronization signals for driving the electromagnets and therefore the levers 2 of each actuator in order to obtain needle selection and therefore provide a particular type of pattern or knitting.
  • the self-learned position of the zero of the needle cylinder 3 with respect to the zero of the encoder 8 allows to precisely calculate the angular position of the needle cylinder 3 and therefore to activate all the actuations programmed to specific positions of said cylinder, for example: electric valves for pneumatic actuations, movement of step motors, halting and reversal of the motion of said cylinder, enabling of sensors, revolution counting, etcetera.
  • the method according to the invention allows to utilize an actuator for actuating the selection of the needles also as a sensor, without necessarily having to add external sensors.
  • the above described method allows to determine both a precise position of each actuator and an absolute position thereof, in this case also without the addition of additional sensors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Nonwoven Fabrics (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Knitting Machines (AREA)
EP00121244A 1999-10-07 2000-10-02 Verfahren und Vorrichtung zum Selbstlernen der Position von elektromechanischen Stellgliedern, insbesonderes für Rundstrickmaschinen und dergleichen Withdrawn EP1091034A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI992100 1999-10-07
IT1999MI002100A IT1314032B1 (it) 1999-10-07 1999-10-07 Procedimento di autoapprendimento della posizione di attuatorielettromeccanici, particolarmente per macchine tessili circolari e

Publications (2)

Publication Number Publication Date
EP1091034A2 true EP1091034A2 (de) 2001-04-11
EP1091034A3 EP1091034A3 (de) 2002-03-06

Family

ID=11383738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00121244A Withdrawn EP1091034A3 (de) 1999-10-07 2000-10-02 Verfahren und Vorrichtung zum Selbstlernen der Position von elektromechanischen Stellgliedern, insbesonderes für Rundstrickmaschinen und dergleichen

Country Status (2)

Country Link
EP (1) EP1091034A3 (de)
IT (1) IT1314032B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008011998A1 (en) * 2006-07-27 2008-01-31 Santoni S.P.A. Method for determining automatically the offset angle between the needle cylinder zero and the encoder zero in a circular knitting machine for hosiery or other articles

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060202A (en) * 1979-09-28 1981-04-29 Savio Spa Control system for circular knitting machines
US4697438A (en) * 1985-09-27 1987-10-06 Veb Kombinat Textima Synchronizing device for the selection of knitting needles in knitting machines
EP0259123A2 (de) * 1986-08-28 1988-03-09 Draper Corporation Rundstrickmaschine
EP0962571A2 (de) * 1998-06-03 1999-12-08 MATEC S.p.A. Verfahren zur Bestimmung der Position von elektro-magnetischen Nadelauswählern der Nadelzylinder an Strickmaschinen für Strümpfen oder dergleichen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060202A (en) * 1979-09-28 1981-04-29 Savio Spa Control system for circular knitting machines
US4697438A (en) * 1985-09-27 1987-10-06 Veb Kombinat Textima Synchronizing device for the selection of knitting needles in knitting machines
EP0259123A2 (de) * 1986-08-28 1988-03-09 Draper Corporation Rundstrickmaschine
EP0962571A2 (de) * 1998-06-03 1999-12-08 MATEC S.p.A. Verfahren zur Bestimmung der Position von elektro-magnetischen Nadelauswählern der Nadelzylinder an Strickmaschinen für Strümpfen oder dergleichen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008011998A1 (en) * 2006-07-27 2008-01-31 Santoni S.P.A. Method for determining automatically the offset angle between the needle cylinder zero and the encoder zero in a circular knitting machine for hosiery or other articles

Also Published As

Publication number Publication date
IT1314032B1 (it) 2002-12-03
ITMI992100A1 (it) 2001-04-07
ITMI992100A0 (it) 1999-10-07
EP1091034A3 (de) 2002-03-06

Similar Documents

Publication Publication Date Title
CN103138662B (zh) 电机控制装置
CN104653767B (zh) 换档档位切换装置
CN104205613B (zh) 用于确定电动机的位置的、尤其是在机动车的离合器操纵系统中的电动机的位置的方法和设备
JPS5927318A (ja) 電動機の制御装置
CN110337553A (zh) 换挡挡位控制装置
EP3136056A1 (de) Positionssensor
EP1091034A2 (de) Verfahren und Vorrichtung zum Selbstlernen der Position von elektromechanischen Stellgliedern, insbesonderes für Rundstrickmaschinen und dergleichen
US20130175963A1 (en) Motor control apparatus
KR20010049358A (ko) 전자무늬 환편기의 제어장치 및 제어방법
CN102443975A (zh) 双针机变位针杆的复位装置
CA2130637A1 (en) Electrically noncontacting transmission control mechanism
JPS63243356A (ja) 自在型マルチヤーンフィード丸編機
EP3665319B1 (de) Einstellbare garnbremse
CN1329675C (zh) 旋转体控制装置
CN107228188A (zh) 自动选换档执行机构、变速器和车辆
US6998808B2 (en) Positioning apparatus using brushless motor
US6879119B2 (en) Positioning controller
KR100527230B1 (ko) 환편기와 캠 시스템 부품을 위한 세팅 장치
RU2817402C2 (ru) Способ выполнения переключения переключателя и приводная система для переключателя
US20040243255A1 (en) Controller for a multi-function appliance
RU2809179C2 (ru) Способ выполнения переключения переключателя ступеней нагрузки посредством приводной системы и приводная система для переключателя ступеней нагрузки
EP3754079B1 (de) Garnzuführvorrichtung und verfahren zum zuführen von garn zu einer textilmaschine
WO2008011998A1 (en) Method for determining automatically the offset angle between the needle cylinder zero and the encoder zero in a circular knitting machine for hosiery or other articles
JP2021531467A (ja) ギアボックスのための内部制御デバイスの位置を検出するためのデバイス
KR20210057968A (ko) 시프트 제어 시스템

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

Kind code of ref document: A2

Designated state(s): DE FR GB IT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20020801

AKX Designation fees paid

Free format text: DE FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20021209