US3860187A - Circuit for controlling the thread velocity in winding equipment with a traversing mechanism - Google Patents

Circuit for controlling the thread velocity in winding equipment with a traversing mechanism Download PDF

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Publication number
US3860187A
US3860187A US352268A US35226873A US3860187A US 3860187 A US3860187 A US 3860187A US 352268 A US352268 A US 352268A US 35226873 A US35226873 A US 35226873A US 3860187 A US3860187 A US 3860187A
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United States
Prior art keywords
velocity
thread
circuit
controlling
winding
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Expired - Lifetime
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US352268A
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English (en)
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Manfred Liska
Jurgen Metzger
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Siemens AG
Siemens Corp
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Siemens Corp
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    • 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
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B65H59/385—Regulating winding speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the problem is solved by introducing into the thread velocity control circuit a correction factor derived from a quantity which is a function of the diameter of the winding such as from the speed of rotation of the spool winder. It is particularly advantageous if the correction fator is derived from the actual value of the speed of rotation of the spool winder drive, because it is usually very complicated to sense the diameter of the winding.
  • the illustrated embodiment uses a d-c motor without a commutator as the spool winder drive with the e.m.f. induced in the stator winding by the permanent-magnet rotor utilized as a measure of the actual value of the speed of ratation.
  • the e.m.f. is advantageously fed to an amplifier whose output signal is used as the correction factor for the reference value transmitter.
  • FIG. 1 is a diagrammatic illustration of the apparent movement of the thread guide over the surface of the winding for a crossing ratio k 1.
  • the crossing ratio is defined as the number of double throws per revolution of the winding. As shown in FIG. 1, the winding diameter d is apparently increased to d during one traversing motion.
  • FIGS. 2 and 3 illustrate side views of the winding shown in FIG. 1, with different diameters.
  • FIG. 4 is the block diagram of a thread velocity control circuit constructed according to the invention for a winding machine drive having subordinated speed control and a correction for the influence of the traversing motion.
  • FIG. 1 is a perspective view showing the manner in which the thread is wound on a spool.
  • the actual diameter d of a loop of thread will be greater than the diameter d of the total winding which is the diameter at which the tangential velocity is sensed. If the ratio of d.'d remained constant, no problems would arise. However, as will be seen by comparing FIGS. 2 and 3, the diameter ratio, d:d', changes with increasing diameter as a result of the fixed spool length 1. Thus, even with an exactly constant tangential velocity of the winding, as measured by a roller tangent to the diameter d, a thread velocity is obtained which decreases with the increasing diameter of the winding.
  • the change in magnitude essentially depends on the change in the diameter of the winding and the crossing ratio. Practical investigations have shown that the velocity deviation can be 10 percent or more. Deviations of such an order of magnitude are no longer permissible in many cases, particularly in precision winding machines. With little thread on the spool, as shown on FIG. 2, the difference between d and d will be great. As more thread is wound on the spool, as shown on FIG. 3, the difference becomes smaller. To maintain a constant tangential velocity the angular velocity of the motor will be higher when there is little thread on the spool and lower when more thread is on the spool. Thus, the velocity of the motor is directly related to the diameter error. The present invention makes use of this fact in providing the needed correction.
  • a commutatorless d-c motor 1 drives the shaft of a winding 2 on which thread-like material is to be wound.
  • the winding equipment comprises a traversing mechanism, not shown in the drawing.
  • the motor 1 has a permanent-magnetic rotor which interacts with four windings arranged in the stator.
  • the stator windings are connected with each other at one end and the neutral point formed in this manner is connected with one terminal of a d-c source.
  • the other ends of the windings are sequentially connected through an electronic commutator 3 and the other terminal of the dc source in such a manner that a rotating field is produced in the stator.
  • the electronic commutator 3 is controlled by a speed control means 4.
  • a conventional d-c motor such as that described in the above referenced application may be used.
  • the voltage-time area of the pulse train x, representing the tangential velocity is compared with an average d-c voltage value x, representing a desired velocity, produced by a reference value transmitter 5.
  • the deviation, x the error between the actual and desired velocities, between x, and x, is fed to an integrator 7, which may be a differentiating-feedback amplifier i.e., it has a capacitor in its feedback path. As long as the deviation x remains at zero the output of the integrator will remain fixed. An error in either direction will cause a charging or discharging of the feed back capacitor to adjust the integrator output until the proper velocity is reached.
  • the output quantity x of integrator 7 is picked off by a potentiometer 8 used to provide coarse control of motor speed. This is the speed control value fed to the speed control means 4.
  • the actual value x,, of the speed of rotation of the motor 1 is determined in a known manner from the e.m.f. of the motor by means of the plurality of diodes l2. Voltages corresponding to the e.m.f. of the motor are induced in the windings of the stator by the revolving permanent-magnet rotor. A tachometer may also be used to develop this signal as described in the above referenced application.
  • the entire circuit for the speed control circuit 11 is indicated by the dashed lines in FIG. 4.
  • the output of potentiometer 8 is summed with the value x to provide outputs to maintain the required motor speed.
  • the portion of the circuit thus far described is conventional and as noted may be constructed in the manner described in application Ser. No. 334,933. However, it will exhibit the inaccuracies described above.
  • the present invention uses the e.m.f. of the motor which is proportional to the angular velocity to derive a correction factor for the thread velocity control circuit 11. This is accomplished by feeding the coupled output of diodes 12 to an amplifier 9, whose output signal x is summed with the input x at the input to potentiometer 8 to provide a correction factor. Although shown as a potentiometer, block 8 may also contain a summing amplifier to sum these signals. The resulting output is then fed to the thread velocity control circuit 11. In order to obtain compensation for different crossing ratios and different reel sizes amplifier 9 has a variable feedback means which, to provide better compensation, can be made non-linear.
  • variable feedback means can comprise a variable resistor in a feedback path which resistor may be setup at the beginning of a winding operation to give the desired gain.
  • the resistor may be replaced by non-linear networks comprising for example, diodes resistors, variable resistors, etc., which also will be initially set up prior to a winding operation.
  • the invention thus permits the application of thread velocity control to precision winding machines. In addition it permits adding improved accuacy to a normal thread velocity control with no additional mechanical components and only a minimum amount of additional circuitry. In addition, one obtains the ability to adapt and use the correction factor produced by the circuit to different designs of spools such as those having different crossing ratios and different ratios of length to diameter.
  • a further advantage consists, moreover, in the fact that the dynamic behavior of the thread velocity does not influence the control circuit because the correction factor only influences the reference value. By introducing non-linear feedback in the correction factor amplifier the deviation of the thread velocity from the ideal value can thereby be reduced to almost zero.
  • a circuit for controlling the thread velocity in a universal winding machine having a traversing mechanism, said machine including a spool drive operated by a speed control, said circuit providing compensation for inaccuracies resulting from said traversing mechanism comprising:
  • c. means having said first and second signals as inputs to develop a speed control signal
  • d. means to develop a third signal proportional to the actual spool drive speed
  • g. means to add said correction factor signal to said speed control signal.
  • a circuit for controlling the thread velocity in a winding machine as in claim I in which the spool winder drive is a dc motor without a commutator and having a permanent magnet rotor and in which the e.m.f. inducted in the stator windings by the permanent-magnet rotor is used to represent the actual value of the speed of rotation of the spindle winder.
  • a circuit for controlling the thread velocity in a winding machine as in claim 2 wherein said means to develop a correction factor signal comprises an amplifier having as an input said e.m.f. induced in the stator windings.

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  • Winding Filamentary Materials (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
US352268A 1972-04-21 1973-04-18 Circuit for controlling the thread velocity in winding equipment with a traversing mechanism Expired - Lifetime US3860187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2219755A DE2219755C3 (de) 1972-04-21 1972-04-21 Vorrichtung zum Konstanthalten des Fadenzuges an Präzisionskreuzspulmaschinen

Publications (1)

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US3860187A true US3860187A (en) 1975-01-14

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US352268A Expired - Lifetime US3860187A (en) 1972-04-21 1973-04-18 Circuit for controlling the thread velocity in winding equipment with a traversing mechanism

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US (1) US3860187A (forum.php)
JP (1) JPS4920453A (forum.php)
BE (1) BE798449A (forum.php)
CH (1) CH553720A (forum.php)
DE (1) DE2219755C3 (forum.php)
FR (1) FR2181371A5 (forum.php)
GB (1) GB1384215A (forum.php)
IT (1) IT982036B (forum.php)
NL (1) NL7305574A (forum.php)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942081A (en) * 1973-09-28 1976-03-02 Siemens Aktiengesellschaft Winding and re-winding apparatus using a D.C. motor with an electronic commutation device
US4169565A (en) * 1977-07-22 1979-10-02 Akzona Incorporated Contactless winding apparatus
US4269368A (en) * 1978-11-07 1981-05-26 Owens-Corning Fiberglas Corporation Microprocessor controlled product roving system
US4344582A (en) * 1978-11-07 1982-08-17 Owens-Corning Fiberglas Corporation Microprocessor-controlled product roving system
US4349160A (en) * 1979-09-25 1982-09-14 The Terrell Machine Company Apparatus and method for winding yarn to form a package
US4464916A (en) * 1982-05-28 1984-08-14 The Minster Machine Company Loop follower straightener control in a press installation
US4494702A (en) * 1981-11-04 1985-01-22 Teijin Seiki Co., Ltd. Yarn winding apparatus
US4666096A (en) * 1984-10-24 1987-05-19 A. Ott Gmbh Thread spooler
US4685629A (en) * 1985-03-28 1987-08-11 Teijin Seiki Co., Ltd. Monitor of abnormality in a yarn winding apparatus
US4715548A (en) * 1985-05-17 1987-12-29 Teijin Seiki Co., Ltd. Spindle drive type yarn winding apparatus
US4986483A (en) * 1986-04-09 1991-01-22 Asahi Kasei Kogyo Kabushiki Kaisha Winder of synthetic yarn, cheese-like yarn package of synthetic yarn, and method for winding the same
US5166583A (en) * 1989-11-30 1992-11-24 Goldstar Co., Ltd. Driving methods and driving circuits for brushless dc motors without rotor position sensors
US5505067A (en) * 1994-07-06 1996-04-09 Waddington Electronics, Inc. Non-contact double-block speed controller
WO2003043919A1 (de) * 2001-11-23 2003-05-30 Ditf Deutsche Institute Für Textil- Und Faserforschung Spulvorrichtung

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2732420A1 (de) * 1977-07-18 1979-02-01 Akzo Gmbh Elektronisch gesteuertes aufwickelaggregat
JPS5521537A (en) * 1978-07-31 1980-02-15 Yazaki Corp Method of deoxidizing molten copper dipping coating
EP0090504A1 (en) * 1982-03-04 1983-10-05 DAVID PARR & ASSOCIATES LIMITED Spooling machines
DE3425064A1 (de) * 1983-07-22 1985-02-07 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Verfahren zum fuehren der spindeldrehzahl an spinnmaschinen und spinnstreckmaschinen
JPH0656347A (ja) * 1992-08-05 1994-03-01 Fuji Electric Co Ltd 巻取り制御用インバータ
DE19735581A1 (de) * 1997-08-16 1999-02-18 Schlafhorst & Co W Spultrommelantrieb einer Kreuzspulen herstellenden Textilmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2569287A (en) * 1948-05-12 1951-09-25 Westinghouse Electric Corp Motor control system
US3114850A (en) * 1960-02-18 1963-12-17 Allis Louis Co Electric clutch reel drive arrangement
US3297266A (en) * 1963-01-11 1967-01-10 Ampex Speed control system
US3606198A (en) * 1969-06-19 1971-09-20 Geo Space Corp Tape transport

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2569287A (en) * 1948-05-12 1951-09-25 Westinghouse Electric Corp Motor control system
US3114850A (en) * 1960-02-18 1963-12-17 Allis Louis Co Electric clutch reel drive arrangement
US3297266A (en) * 1963-01-11 1967-01-10 Ampex Speed control system
US3606198A (en) * 1969-06-19 1971-09-20 Geo Space Corp Tape transport

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942081A (en) * 1973-09-28 1976-03-02 Siemens Aktiengesellschaft Winding and re-winding apparatus using a D.C. motor with an electronic commutation device
US4169565A (en) * 1977-07-22 1979-10-02 Akzona Incorporated Contactless winding apparatus
US4269368A (en) * 1978-11-07 1981-05-26 Owens-Corning Fiberglas Corporation Microprocessor controlled product roving system
US4344582A (en) * 1978-11-07 1982-08-17 Owens-Corning Fiberglas Corporation Microprocessor-controlled product roving system
US4349160A (en) * 1979-09-25 1982-09-14 The Terrell Machine Company Apparatus and method for winding yarn to form a package
US4494702A (en) * 1981-11-04 1985-01-22 Teijin Seiki Co., Ltd. Yarn winding apparatus
US4464916A (en) * 1982-05-28 1984-08-14 The Minster Machine Company Loop follower straightener control in a press installation
US4666096A (en) * 1984-10-24 1987-05-19 A. Ott Gmbh Thread spooler
US4685629A (en) * 1985-03-28 1987-08-11 Teijin Seiki Co., Ltd. Monitor of abnormality in a yarn winding apparatus
US4715548A (en) * 1985-05-17 1987-12-29 Teijin Seiki Co., Ltd. Spindle drive type yarn winding apparatus
US4986483A (en) * 1986-04-09 1991-01-22 Asahi Kasei Kogyo Kabushiki Kaisha Winder of synthetic yarn, cheese-like yarn package of synthetic yarn, and method for winding the same
US5166583A (en) * 1989-11-30 1992-11-24 Goldstar Co., Ltd. Driving methods and driving circuits for brushless dc motors without rotor position sensors
US5505067A (en) * 1994-07-06 1996-04-09 Waddington Electronics, Inc. Non-contact double-block speed controller
WO2003043919A1 (de) * 2001-11-23 2003-05-30 Ditf Deutsche Institute Für Textil- Und Faserforschung Spulvorrichtung
US20060169824A1 (en) * 2001-11-23 2006-08-03 Ditf Deutsche Institute Fur Textil-Und Faserforschung Bobbin winding system
US7410116B2 (en) 2001-11-23 2008-08-12 Ditf Deutsche Institute Fur Textil- Under Faserforschung Bobbin winding system

Also Published As

Publication number Publication date
DE2219755C3 (de) 1978-04-06
FR2181371A5 (forum.php) 1973-11-30
BE798449A (fr) 1973-08-16
DE2219755A1 (de) 1973-10-31
JPS4920453A (forum.php) 1974-02-22
IT982036B (it) 1974-10-21
DE2219755B2 (de) 1977-08-04
CH553720A (de) 1974-09-13
GB1384215A (en) 1975-02-19
NL7305574A (forum.php) 1973-10-23

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