EP3159442A1 - Procédé de commande de livraison du fil d'un distributeur de fil et distributeur de fil - Google Patents

Procédé de commande de livraison du fil d'un distributeur de fil et distributeur de fil Download PDF

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Publication number
EP3159442A1
EP3159442A1 EP16192377.6A EP16192377A EP3159442A1 EP 3159442 A1 EP3159442 A1 EP 3159442A1 EP 16192377 A EP16192377 A EP 16192377A EP 3159442 A1 EP3159442 A1 EP 3159442A1
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EP
European Patent Office
Prior art keywords
value
unit
thread tension
thread
brake
Prior art date
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Granted
Application number
EP16192377.6A
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German (de)
English (en)
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EP3159442B1 (fr
Inventor
Bernd Günter
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.)
Memminger IRO GmbH
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Memminger IRO GmbH
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Publication of EP3159442A1 publication Critical patent/EP3159442A1/fr
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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
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • D04B15/484—Yarn braking means acting on the drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
    • 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
    • D03D47/364—Yarn braking means acting on the drum

Definitions

  • the invention relates to a method for controlling the yarn delivery from a yarn feeding device to a textile machine and a yarn feeding device.
  • the thread is withdrawn by the textile machine from a storage body of the yarn feeding device.
  • a yarn tension of the yarn is adjusted by a braking device in the yarn path after the storage body by a brake body of the brake device is pressed against a clamping surface at a discharge end of the storage body.
  • an adjusting device of the brake device acts on the brake body, which is controlled by a brake signal.
  • Such a method is for example from the WO 2007/048528 A1 in which a device for fully automatic adjustment of the yarn length, which is fed to a knitting system, is described.
  • the device has a yarn storage unit with a drum, a yarn length measuring detector and a braking element designated as an element for adjusting the yarn tension.
  • the element is axially in contact with the discharge end of the drum.
  • the position or the applied force of the element is variable by an electric drive unit of a setting device to adjust the yarn tension.
  • the thread tension is adjusted by adjusting the braking signal to a reference value of the thread tension.
  • the thread tension is controlled by adjusting an actuator device or the brake signal to a reference value of the thread tension, whereby a measured value of the thread tension is detected by a thread tension sensor and a difference between the measured value and the reference value of the thread tension is minimized.
  • the EP 2 014 809 relates to a weft feeder for textile machines with a thread-storing drum, from which the thread is unwound, and a weft braking device, which is mounted on a movable carriage.
  • the yarn feeder includes a brake member and brake member actuator, a thread tension sensor that generates a voltage signal, and a controller that compares the measured voltage signal to a reference voltage signal and drives the actuator to minimize the difference between the measured voltage and the reference voltage ,
  • a method for controlling the tension of the yarn unwinding from a negative yarn feeder for textile machines is described.
  • the tension is adjusted by a weft braking device controlled by a tension control block.
  • the voltage control block compares a measured voltage with a reference voltage and transmits a brake level signal to the weft braking device.
  • the brake level signal is intended to minimize the difference between the measured voltage and the reference voltage.
  • the yarn consumption rate is calculated and compared to a predetermined speed threshold value.
  • the voltage control block is activated when the calculated yarn consumption speed exceeds the threshold. It is switched off when the consumption rate is lower than the threshold value, with the signal last generated being maintained as a brake signal until the yarn consumption speed again exceeds the threshold value.
  • Turning off the voltage control block is intended to negate the voltage regulation e.g. when starting or threading or inserting, when the yarn is not moving and the yarn tension is much lower than in normal operation, overcome.
  • a control unit which receives signals of the measured voltage, compares them with a predetermined reference voltage signal and generates in a control loop a brake signal for minimizing the difference between the two signals.
  • a first set of coefficients is used for the control loop for a relatively slow control response.
  • the reference voltage changes, it switches to a second set of fast-response coefficients until the difference between the two signals reaches a minimum value. It is switched back to the first set of coefficients.
  • Switching the control response of the voltage control is intended to provide voltage regulation for both occasional voltage spikes, e.g. allow for thicker spots in the yarn, as well as for rapid adaptation to changed reference voltage.
  • the object of the invention is to improve a method for controlling the yarn delivery from a yarn feeding device to a textile machine and a yarn feeding device according to the preambles of the independent claims, in particular to simplify.
  • the yarn is pulled off a storage body of the yarn feeding device through the textile machine.
  • a thread tension of the thread is set in the course of the thread after the storage body by at least one brake body of a braking device.
  • the thread tension is adjusted by a brake body, which is pressed against a clamping surface, for example at the discharge end of the storage body, over which the thread is guided.
  • a brake body which is pressed against a clamping surface, for example at the discharge end of the storage body, over which the thread is guided.
  • one or two brake plates are used as brake bodies.
  • a brake body in the form of a cone which can be pressed against the discharge end of the storage body is used.
  • the brake body is adjusted by at least one adjusting element of an adjusting device of the braking device acting on the or the brake body.
  • the one or more actuators are controlled by a brake signal.
  • the adjusting elements are designed to exert more or less force on the brake body or brakes, depending on the control by the brake signal.
  • the actuators e.g. by a stepper motor, driven.
  • the thread tension is regulated.
  • the thread tension is controlled by setting the brake signal by a thread tension unit to a reference value.
  • measured values for the thread tension are determined by a tension measuring unit and in each case a difference between the measured value and the reference value is minimized.
  • the thread tension is adjusted by adjusting an auxiliary value of the brake signal.
  • the operating state is determined by means of a test variable, namely by a value of the test variable with reference to a threshold.
  • a measure of fluctuations in the measured values of the thread tension is determined by a test unit.
  • the variance is determined as a simple variance from the measured values of the thread tension with respect to filtered measured values.
  • the filtered measurements are determined as moving averages.
  • a threshold is chosen for the variance that indicates whether the thread is running or not.
  • the operating state is determined as the first operating state when the variance is greater than the selected threshold, and determined as the second operating state when the variance is less than or equal to the selected threshold.
  • the use of the variance of the measured values of the thread tension i. the use of the existing thread tension itself, as a test size allows a determination of the operating state without any other mechanical or electronic measuring units, such as. at a determination of a yarn consumption speed.
  • the test unit uses a constant threshold for the variance.
  • a constant threshold e.g. a value greater than a maximum variance when the trigger is stopped.
  • the test unit determines a threshold value from a filtered variance.
  • the values for the filtered variance are determined as moving averages of the variance.
  • the threshold is e.g. as a proportion of the filtered variance, e.g. as a value of 60 to 90% of the filtered variance.
  • the advantage of a threshold dependent on the filtered variance is that when the variance drops rapidly, e.g. if the thread take-off is stopped, the higher threshold is fallen short of faster.
  • the second operating state is determined faster than at a constant lower threshold.
  • the test unit computes and uses a threshold value of a filtered variance if it is greater than a constant threshold and otherwise uses the constant threshold.
  • a first auxiliary value of the brake signal is determined for a second operating state.
  • the first auxiliary value of the brake signal becomes constant Reference value of the thread tension used in the second operating state. It is determined by a first determination unit if the measured values fluctuate around the reference value. Ie. the first auxiliary value is determined when the reference value Mref is reached.
  • the first auxiliary value is determined when an error variance of the measured values relative to the reference value is smaller than a variance of the measured values with respect to multiply filtered, eg. B. averaged, measured values.
  • the measured values of the thread tension and thus their variance fluctuate, even if the reference value is reached. It has been shown that a variance of the measured values relative to the reference value is somewhat smaller than the variance of the measured values with respect to filtered measured values; in particular, it is slightly lower than a comparative variance of the measured values with respect to several times, e.g. twice filtered readings.
  • the second filtering e.g. also sliding average values are formed, if necessary from the moving average values of the measured values formed in the first filtering.
  • a second auxiliary value of the brake signal is used in a second operating state when changing the reference value of the thread tension.
  • the second auxiliary value corresponds to an output value of the brake signal, e.g. a mean value of the brake signal for a mean yarn tension.
  • the second auxiliary value corresponds to the current value of the brake signal, which is gradually reduced to an initial value.
  • the braking signal used is a working current activating the actuating elements of a working coil.
  • the working current is supplied by a power supply unit of the adjusting device. With the adjustment of the working current by the thread tension unit, the thread tension is adjusted.
  • the working flow itself is regulated.
  • the working current is regulated to a final setpoint.
  • This final setpoint is set by the thread tension unit.
  • the regulation of the working current are designed as an internal regulation and the regulation of the thread tension as an external regulation. That the regulation of the working current is carried out with a time constant z. B. 3 to 300 times smaller than the time constant of the control of the thread tension.
  • the adjusting elements are designed as magnetic elements, wherein a magnetic element in the magnetic field of the other magnetic element is movable and on the
  • Brake body acts.
  • the thread tension is adjusted by one of the two magnetic elements, which is designed as a working coil, is driven by the working current.
  • Inventive yarn feeding devices are designed for carrying out the method according to the invention. If applicable, they have the corresponding features and advantages of the methods.
  • An inventive yarn feeding device for yarn delivery to a textile machine has a storage body, from which a thread through the textile machine can be pulled off.
  • the yarn feeding device comprises a braking device with at least one brake body, wherein the one or more brake bodies are arranged in the thread path after the storage body.
  • the yarn feeding device comprises an adjusting device of the braking device with at least one actuating element, which act on the one or more brake bodies and can be controlled by a brake signal.
  • the yarn feeding apparatus is provided with a yarn tension unit configured to control the yarn tension to a reference value by adjusting the braking signal.
  • the thread tension unit comprises a tension measuring unit for determining measured values of the thread tension and a tension regulating unit for minimizing a difference between the measured value and the reference value.
  • the thread tension unit is designed to regulate the thread tension by setting the brake signal to a reference value in a first operating state and to set an auxiliary value in a second operating state, wherein the operating state is determined by a test value based on a threshold.
  • the thread tension unit has a test unit which is designed to determine a measure of the fluctuations of the measured values Mi as a test variable.
  • test unit is also designed to determine the threshold.
  • the thread tension unit has a first determination unit.
  • the first determination unit is designed to determine a first auxiliary value of the braking signal at a constant reference value if the measured values of the thread tension fluctuate around the reference value.
  • the thread tension unit has a second determination unit.
  • the second determination unit is designed to use a value which corresponds to an output value of the brake signal or which is a value of the brake signal which is returned stepwise to the output value when the reference value is changed as an auxiliary value of the brake signal.
  • the adjusting elements can be controlled by a working current of a working coil.
  • the current supply unit has a current regulating device, wherein the current regulating unit is designed as an internal regulator and the thread tensioning unit as an external regulator.
  • the adjusting elements are designed as magnetic elements, wherein a magnetic element in the magnetic field of the other magnetic element is movable and can be acted upon by the brake body, and wherein one of the magnetic elements is designed as a working coil, which is driven by the working current.
  • the textile machine is in one example a knitting machine, e.g. a flat knitting machine or a circular knitting machine.
  • An inventive yarn feeding device 1 for supplying a thread 40 to a textile machine the FIG. 1 is designed as a storage yarn feeding device.
  • the yarn feeder 1 has a holder 2, a take-up unit, a storage body 3, from which the yarn 40 is pulled off by the textile machine, and a brake device for adjusting a yarn tension.
  • the textile machine is for example a circular knitting machine.
  • the holder 2 is provided with a fastening device 4 for fastening the yarn feeding device 1 to the textile machine, for example on a machine ring of the circular knitting machine.
  • the storage body 3 is formed as a storage drum having an axis 5. At the rewinding, in the FIG. 1 At the right end, the storage body 3, the take-up unit for winding up yarn turns, ie turns of the yarn, is arranged on the storage body 3.
  • the take-up unit is provided with a drive arranged in a drive housing 6 and a drive drivable by the drive take-up element 7.
  • the holder 2 extends parallel to the axis 5 along the storage body 3.
  • the drive housing 6 is attached to the take-up, in the figures at the right end of the storage body 3 on the holder 2.
  • the brake device for adjusting a thread tension of the thread 40 has a brake body 8 and an adjustment device for the brake body 8.
  • the brake body 8 is arranged in the thread path after the storage body 3, wherein it is arranged at the dashed line drawn-off end of the storage body 3.
  • a housing 9 of the braking device is attached to the drive housing 6 opposite end of the storage body to the holder 2.
  • the brake body 8 is conical, as a compliant brake body cone in the form of a regular truncated cone, formed.
  • it is made of a plastic and / or metal.
  • Corresponding or similar brake bodies are for example in the WO2006 / 045410 A1 described.
  • the axis of the brake body 8 is substantially true, d. H. except for small deviations e.g. by lifting through the thread 40 or upon deformation of the elastic brake body 8, with the axis 5 of the storage body 3 match.
  • the discharge end of the storage body 3 is rounded and forms in the region of the rounding an annular clamping surface 10.
  • the brake body 8 protrudes with its larger diameter on the clamping surface 10. It is by the adjustment against the clamping surface 10 at the discharge end of the storage body 3 can be pressed.
  • the thread 40 When the thread 40 is pulled through the textile machine, the thread 40 runs from the storage body 3 through the gap between the withdrawal end of the storage body 3 and the brake body 8 via the clamping surface 10.
  • the adjusting device has adjusting elements, namely magnetic elements, wherein a magnetic element in the magnetic field of another magnetic element is movable and acts on the brake body 8.
  • One of the magnetic elements is designed as a working coil 12.
  • the adjusting device comprises a permanent element, hereinafter PM element, and the working coil 12 movable in the magnetic field of the PM element.
  • the PM element and the working coil 12 are located in the housing 9 and are in FIG. 1 not visible.
  • the working coil 12 acts on the brake body 8.
  • the working coil 12 operates on the principle of a plunger coil, which English is called "voice coil".
  • the magnetic elements of the adjuster are controlled by a brake signal, namely by a working current for the working coil 12.
  • a brake signal namely by a working current for the working coil 12.
  • In contact with the brake body 8 causes an action on the working coil 12 with a certain working current to a possibly small, axial movement of the working coil 12 and thus a change in the contact force of the brake body 8 against the clamping surface 10.
  • a desired yarn tension is adjusted.
  • the holder 2 forms, starting from the housing 9, an electronic chamber E, in which electronic elements of the adjusting device, such as a power supply unit, are arranged to control the working coil 12.
  • electronic elements of the adjusting device such as a power supply unit
  • FIG. 1 the area of the electronics chamber E can be seen above the housing 9.
  • Such a braking device is in the EN 10 2013 113 115.8 and the DE 10 2013 113 122.0 described.
  • the yarn feeding device 1 comprises a yarn tension unit with a tension measuring unit which has a yarn tension sensor 50, a measuring device 51 and a connection 52.
  • FIG. 1 schematically shows the yarn tension sensor 50 with the direction indicated by arrows measuring device 51, the thread behind the housing 9, ie in FIG. 1 on the left, is arranged.
  • the measuring device 51 of the yarn tension sensor 50 is connected via the connection 52 with the yarn feeding device 1.
  • the yarn tension sensor 50 is attached to the housing 9.
  • FIG. 2 shows a block diagram for controlling the yarn delivery of the yarn feeding device.
  • the adjusting device comprises a current supply unit for the working current of the working coil 12, which comprises a current unit SL and a current regulating device.
  • the current unit SL is provided with a pulse width modulation.
  • the current control device is connected to a current measuring unit SM and provided with a flow control unit SR.
  • the current control unit SR is designed for example as a PI controller and connected to the power unit SL.
  • the yarn feeding device 1 has a processor unit P, which comprises the current supply unit and the thread tension unit.
  • the thread tension unit includes a tension control unit 80, a reference value unit 81 for the reference value Mref and an adder 82 for controlling the thread tension in addition to the tension measuring unit.
  • the thread tension unit comprises a first determination unit 83 for determining a first auxiliary value Ihc. It comprises a second determination unit 84 for determining a second auxiliary value Iho.
  • the thread tension unit comprises for determining the operating state of the yarn feed wheel 1, a test unit 85 and a switching unit S.
  • the test unit 85 is designed to determine a measure of fluctuations in the measured values Mi of the thread tension as a test variable.
  • the test unit 85 is designed, for. B. to determine a simple variance V1 as a test variable to use or to determine a threshold V3 and to generate from a comparison a signal S2, which indicates the operating state of the yarn feeding device 1. To transmit the signal S2, the test unit 85 is connected to the switching unit S, the voltage regulation unit 80 and the first determination unit 83.
  • the thread tension unit comprises a memory unit 86 for a value I_SOLL of the working flow. It is connected via this memory unit 86 to the power supply unit, specifically to the power control unit SR.
  • the value I_SOLL is the value of the working current which is transferred from the thread tension unit to the current supply unit.
  • the reference value unit 81 is designed to transmit a reference value Mref for the measured values Mi of the thread tension. It is connected to a reference value input of the voltage regulation unit 80 and to an input of the first determination unit 83 in order to transmit the reference value Mref.
  • the reference value unit 81 is also designed to generate a switching signal S1 when the reference value Mref is changed. To transmit the switching signal S1, the reference value unit 81 is connected to the switching unit S.
  • the output of the measuring device 51 is connected via the connection 52 for transmitting the measured values Mi to a measured value input of the voltage regulating unit 80, to an input of the test unit 85 and to an input of the first determining unit 83.
  • the voltage regulation unit 80 is designed to calculate a difference Mdiff from the measured value Mi and the reference value Mref and to determine from the difference Mdiff a positive or negative current difference Idiff of the working current, wherein the difference Mdiff is minimized.
  • a manipulated variable output of the voltage regulation unit 80 is connected to an input of the adder 82 for transferring the change in the manipulated variable, namely the current difference Idiff.
  • the memory unit 86 is connected to a second input of the adder 82 for transferring the value I_SOLL of the working current.
  • An output of the adder 82 is connected to an input 1 of the switching unit S for transferring the value Isoll of the working current.
  • the memory unit 86 is connected to an input of the first determination unit 83 in order to transfer the value I_SOLL of the working current.
  • An output of the first determination unit 83 is connected to an input 2a of the switching unit S for the transfer of the auxiliary value Ihc.
  • the memory unit 86 is connected to an input of the second determination unit 84 for transferring the value I_SOLL of the working current.
  • An output of the second determination unit 84 is connected to an input 2b of the switching unit S for the transfer of the second auxiliary value Iho.
  • An output of the switching unit S is connected to the memory unit 86 for the value I_SOLL.
  • a first operating state B1 of the yarn feeding device 1 the input 1 is connected to the output in the switching unit S, so that the value Isoll of the working current determined by the voltage regulating unit 80 and the adder 82 is applied to the memory unit 86 for transfer.
  • a second operating state B2 the input 2a or the input 2b is connected to the output in the switching unit S. If the input 2a is connected to the output, the first auxiliary value Ihc of the first determination unit 83 is present for the transfer. If the input 2b is connected to the output, the second auxiliary value Iho of the second determination unit 84 is present for transfer.
  • the switching unit S By the signal S2 of the test unit 85, the switching unit S, and thus the yarn feed wheel 1, from the first operating state B1 in the second operating state B2 and vice versa switchable.
  • the input 2a With a constant reference value Mref, the input 2a is connected to the output.
  • the switching unit S can be switched by the signal S1 of the reference unit 81 from the input 2a to the input 2b.
  • the central control device FS is designed to supply the desired value Fsoll for the thread tension.
  • the processor unit P is connected to the reference value unit 81 via one of the communication links K with the central control device FS, e.g. a system with one or more yarn feeding devices 1, connected.
  • the communication link K is e.g. formed as a CAN-BUS, to which the yarn feeding devices 1 and the central control device FS are connected.
  • a desired value Fsoll of the thread tension is transmitted from the central control device FS, namely from the control device FS, to the processor unit P and indeed to the reference value unit 81 via the communication link K.
  • the reference value unit 81 is designed to convert the value Fsoll of the thread tension into the corresponding reference value Mref.
  • the processor unit P of the yarn feeding device 1 is arranged in the yarn feeding device 1, namely in the setting device.
  • the processor unit P comprises the current control unit SR and the thread tension unit.
  • the specified elements are designed as electronic elements and / or as programs (software).
  • the thread 40 is supplied from the yarn feeding device 1 to the textile machine by the thread 40 is withdrawn through the textile machine from the storage body 3 of the yarn feeding device 1.
  • a thread tension of the thread 40 is set in the course of the thread after the storage body 3 by the braking device by the brake body 8 is pressed against the clamping surface 10 at the discharge end of the storage body 3.
  • the controlled by the brake signal actuator of the adjustment acts on the brake body 8 a.
  • a magnetic element of the adjusting device namely the working coil 12, which is movable in the magnetic field of the other magnetic element, the PM element, acts on the brake body 8.
  • a thread tension is adjusted by a working current of the working coil 12.
  • the working current is provided by the yarn tension unit of the stream supply unit.
  • a first operating state B1 the thread tension of the thread 40 is regulated by setting the working current to a reference value Mref, wherein the difference Mdiff between a measured value Mi and reference value Mref is minimized.
  • the measuring device 51 of the yarn tension sensor 50 determines the measured values Mi for the yarn tension.
  • the Voltage regulating unit 80 is calculated from the measured value Mi and the reference value Mref the difference Mdiff and determined from the difference Mdiff a current difference Idiff.
  • This positive or negative current difference Idiff is added in the adder 82 to the setpoint I_SOLL of the working current output by the memory unit 86.
  • the operating current Isoll leaving the adder 82 is supplied to the memory unit 86 via the switching unit S.
  • a second operating state 2a, 2b the thread tension is adjusted by setting an auxiliary value Ihc, Iho of the working current.
  • the operating state is determined by means of a measure of the fluctuation of the measured values Mi of the thread tension with respect to a threshold determined by the test unit 85.
  • the test unit 85 uses a threshold V3 for the variance V1, which has as the lowest value a constant initial threshold V3 0 .
  • the values for the filtered variance V1 m are determined as moving averages of the variance V1.
  • Fig. 3 shows a representation of a course of a simple variance V1 of the measured values Mi and its threshold V3 as a function of the time t, wherein the determined by the test unit 85 operating state changes.
  • V1 V 1 > V 3 .
  • V 1 V 3 *
  • the yarn feed wheel 1 is switched by the test unit 85 at a constant reference value Mref in the second operating state 2a. With decreasing variance V1, the threshold V3 * also drops to the initial threshold value V3 °.
  • the first determining unit 83 determines a first auxiliary value Ihc of the operating current for the second operating state B2a when the measured values Mi fluctuate about the reference value Mref.
  • MMMI 1 to N .
  • N z , B , 256 .
  • MMMI 1 / n mmi + n - 1 Mmmj .
  • j i - 1 .
  • n z , B , 256th
  • the multiply filtered measured values Mmmi are determined as moving average values from the average values Mmi of the measured values Mi. That The multiply filtered measured values Mmmi are filtered twice in this example and thus doubled twice.
  • Fig. 4 shows a representation of a course of an error variance V2 and apatvarianz V4, wherein the operating state changes.
  • the first auxiliary value Ihc is determined in the first operating state B1 if the error variance V2 is smaller than the comparison variance V4: V 2 ⁇ V 4th
  • FIG. 4 shows that this condition is met during a first operating state B1 except for an initial and an end phase.
  • the first determination unit 83 determines the respective current setpoint I_SOLL of the working current as the first auxiliary value Ihc as long as this condition is fulfilled.
  • the thread tension is regulated as described in a first operating state B1.
  • the switching unit S is switched by the signal S1 to the input 2b.
  • the yarn feeding device 1 is in the second operating state 2b.
  • the second determination unit 84 determines an output value I_0 as the second auxiliary value Iho. In an alternative, the second determination unit 84 determines the current setpoint value I_SOLL as a second auxiliary value Iho and returns it stepwise to the output value I_0.
  • FIG. 5 shows a simplified flow chart of the determination of a value Isoll of the working current through the yarn tension unit.
  • measured values Mi of the thread tension are determined by the measuring device 51. From the measured values Mi, the simple variance V1 and the threshold V3 are determined by the test unit 85.
  • the current difference Idiff is determined by the voltage regulation unit 80 from the deviation Mdiff of the respective measured value Mi from the reference value Mref.
  • the adder 82 calculates the value Isoll as the sum of the old setpoint I_SOLL and the current difference Idiff.
  • the value Isoll applied to the input 1 of the switch unit S is supplied to the memory unit 86 as a new desired value I_SOLL.
  • the yarn feeding device 1 operates in the first operating state B1, in which the thread tension is regulated.
  • first auxiliary value Ihc is not invalid, i. If the first auxiliary value Ihc is valid, it is present at the input 2a of the switching unit S.
  • the first auxiliary value Ihc is supplied to the memory unit 86 by the switching unit S as a new desired value I_SOLL.
  • the switch S is set to the input 2b by the signal S1.
  • the second determination unit 84 checks whether the old setpoint value I_SOLL is greater than the output value I_0.
  • the old value I_SOLL is less than or equal to an output value I_0, the old value I_SOLL is determined as the second auxiliary value Iho.
  • the steps are alternatively z. B. instead of 1 mA 0.5 mA.
  • the second auxiliary value Iho is incrementally increased to the output value I_0.
  • the second auxiliary value is applied to the input 2b of the switching unit S and is supplied to the memory unit 86 by the switching unit S as a new value I_SOLL. With the transfer of a new value I_SOLL the determination ends.
  • FIG. 6 The current value of the error variance V2 becomes the current value Mi and the reference value Mref, and the current measured value Mi and its twice-filtered value Mmmi become the current value of the comparison variance V4 determined.
  • the variance V1 is greater than the threshold V3, it is checked by the first determination unit 83 whether the error variance V2 is smaller than the comparison variance V4.
  • the current value I_SOLL is determined as the first auxiliary value Ihc.
  • FIG. 7 shows a simplified flowchart of a step of determining the value I_SOLL when changing the reference value Mref.
  • the reference value Mref is changed, ie Mref (t + 1) ⁇ Mref (t).
  • the time t + 1 is the time following the time t.
  • the first auxiliary value Ihc is set invalid by the signal S1.
  • the value of the second auxiliary value Iho is set to the initial value I_0.
  • the threshold V3 is set to the initial threshold V3 °. This ends the process step.
  • the thread tension unit transfers the values I_SOLL of the working current of the memory unit 86 to the current control unit SR.
  • the current control unit SR determines from the values I_SOLL and I_IST a current control value, specifically a switch-on ratio, which is supplied to the current unit SL for pulse width modulation.
  • the regulation of the working current is carried out with a time constant T1 which is 3 to 300 times smaller than the time constant T2 of the regulation of the thread tension.
  • the time constant T 1 is 0.5 to 3 ms, z. B. 1.5 ms.
  • the control of the thread tension is performed with a time constant t2 of 0.05 s to 5 s, in particular from 0.1 s to 2 s, z. B. 0.3 s.
  • the current difference Idiff is determined by the voltage regulating unit 80 from the difference Mdiff of a respective filtered measured value Mmi from the reference value Mref.
  • the filtered measured values Mmi are determined as moving average values.
  • the operating current setting device comprises a current supply unit which is provided with a current unit SL with a pulse width modulation.
  • the working coil 12 supplied working current is not regulated separately.
  • the transferred value I_SOLL is used as a current value and supplied as a duty cycle of the pulse width modulation of the current unit SL.
  • the first auxiliary value Ihc is filtered by the first determining unit 83.
  • the filtered auxiliary values Ihc are z. B. determined as moving average values of the auxiliary values Ihc, which are determined in each query, when the error variance V2 is smaller than the comparison variance V4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Looms (AREA)
EP16192377.6A 2015-10-22 2016-10-05 Procédé de commande de livraison du fil d'un distributeur de fil et distributeur de fil Active EP3159442B1 (fr)

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DE102015118027.8A DE102015118027B3 (de) 2015-10-22 2015-10-22 Verfahren zur Steuerung der Fadenlieferung eines Fadenliefergerät und Fadenliefergerät

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CN (1) CN107055208B (fr)
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Publication number Priority date Publication date Assignee Title
DE102017128327B3 (de) 2017-11-29 2019-01-10 Memminger-Iro Gmbh Verfahren zur Steuerung der Lieferung von Fäden eines Systems mit mehreren Fadenliefergeräten und Textilmaschine mit einem System mit mehreren Fadenliefergeräten

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536088B1 (fr) 1991-09-20 1996-03-27 L.G.L. ELECTRONICS S.p.A. Frein de fil module pour un fournisseur de trame
DE4444140A1 (de) 1994-12-12 1996-06-13 Akzo Nobel Nv Lösungsmittelgesponnene cellulosische Filamente
EP0707102B1 (fr) 1994-10-10 1999-12-22 L.G.L. ELECTRONICS S.p.A. Frein de fil positif modulé pour fournisseurs de trame
EP1314806A2 (fr) * 2001-07-25 2003-05-28 L.G.L. Electronics S.p.A. Méthode et dispositif de contrôle pour dispositifs de freinage de trame pour régler automatiquement la tension du fil dans les métiers à tisser
DE10343506A1 (de) * 2003-09-19 2005-04-14 Iropa Ag Verfahren zum adaptiven Steuern einer elektrisch betätigten Schussfaden-Bremse
WO2006045410A1 (fr) 2004-10-21 2006-05-04 Iro Ab Corps tendeur de fil
WO2007048528A1 (fr) 2005-10-27 2007-05-03 Memminger-Iro Gmbh Dispositif de controle entierement automatique de longueur de fil
EP2014809A1 (fr) 2007-07-13 2009-01-14 L.G.L. Electronics S.p.A. Fournisseur de trame pour machine textile avec dispositif de freinage de trame
EP2031106A1 (fr) 2007-08-31 2009-03-04 L.G.L. Electronics S.p.A. Procédé de controle de tension d'un fil délivré par un fournisseur négatif vers une machine textile, et dispositif permettant de mettre en oeuvre le procédé
DE19605675C5 (de) 1996-02-15 2010-06-17 Oerlikon Heberlein Temco Wattwil Ag Verfahren zum aerodynamischen Texturieren sowie Texturierdüse
EP2671831A1 (fr) 2012-06-04 2013-12-11 L.G.L. Electronics S.p.A. Procédé de contrôle de tension de dévidage de fil à partir d'un guide-fil de fil stockage pour machine textile
DE102013113122A1 (de) 2013-11-27 2015-05-28 Memminger-Iro Gmbh Fadenliefergerät
DE102013113115A1 (de) 2013-11-27 2015-05-28 Memminger-Iro Gmbh Verfahren zur Steuerung der Fadenlieferung, Fadenliefergerät und System mit Fadenliefergeräten

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20020945A1 (it) * 2002-05-03 2003-11-03 Tiziano Barea Metodo e dispositivo per l'alimentazione ed il recupero a tensione costante di un filato alimentato ad una macchina tessile
DE102014118743B4 (de) * 2014-12-16 2023-12-21 Memminger-Iro Gmbh Verfahren zur Steuerung der Fadenlieferung eines Fadenliefergerät und Fadenliefergerät

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536088B1 (fr) 1991-09-20 1996-03-27 L.G.L. ELECTRONICS S.p.A. Frein de fil module pour un fournisseur de trame
EP0707102B1 (fr) 1994-10-10 1999-12-22 L.G.L. ELECTRONICS S.p.A. Frein de fil positif modulé pour fournisseurs de trame
DE4444140A1 (de) 1994-12-12 1996-06-13 Akzo Nobel Nv Lösungsmittelgesponnene cellulosische Filamente
DE19605675C5 (de) 1996-02-15 2010-06-17 Oerlikon Heberlein Temco Wattwil Ag Verfahren zum aerodynamischen Texturieren sowie Texturierdüse
EP1314806A2 (fr) * 2001-07-25 2003-05-28 L.G.L. Electronics S.p.A. Méthode et dispositif de contrôle pour dispositifs de freinage de trame pour régler automatiquement la tension du fil dans les métiers à tisser
DE10343506A1 (de) * 2003-09-19 2005-04-14 Iropa Ag Verfahren zum adaptiven Steuern einer elektrisch betätigten Schussfaden-Bremse
WO2006045410A1 (fr) 2004-10-21 2006-05-04 Iro Ab Corps tendeur de fil
WO2007048528A1 (fr) 2005-10-27 2007-05-03 Memminger-Iro Gmbh Dispositif de controle entierement automatique de longueur de fil
EP2014809A1 (fr) 2007-07-13 2009-01-14 L.G.L. Electronics S.p.A. Fournisseur de trame pour machine textile avec dispositif de freinage de trame
EP2031106A1 (fr) 2007-08-31 2009-03-04 L.G.L. Electronics S.p.A. Procédé de controle de tension d'un fil délivré par un fournisseur négatif vers une machine textile, et dispositif permettant de mettre en oeuvre le procédé
EP2671831A1 (fr) 2012-06-04 2013-12-11 L.G.L. Electronics S.p.A. Procédé de contrôle de tension de dévidage de fil à partir d'un guide-fil de fil stockage pour machine textile
DE102013113122A1 (de) 2013-11-27 2015-05-28 Memminger-Iro Gmbh Fadenliefergerät
DE102013113115A1 (de) 2013-11-27 2015-05-28 Memminger-Iro Gmbh Verfahren zur Steuerung der Fadenlieferung, Fadenliefergerät und System mit Fadenliefergeräten

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TW201731754A (zh) 2017-09-16
CN107055208A (zh) 2017-08-18
TWI631252B (zh) 2018-08-01
CN107055208B (zh) 2019-05-10
EP3159442B1 (fr) 2021-09-01

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