JPH0413273B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a method for driving a spindle-driven winding machine. (Prior art) Recently, winding machines have become larger (for example, the bobbin holder length is 900 mm or more) and faster (for example, 5000 m/min).
above). As a conventional winding machine of this type, for example,
Some of them are described in JP-A No. 55-25583 and JP-A-58-78953. In this winding machine, a contact roller is brought into pressure contact with a package to be wound onto a bobbin holder, and the yarn is wound by controlling the number of revolutions of the contact roller or the tension of the yarn to a predetermined value. (Problems to be Solved by the Invention) However, in such a conventional winding machine driving method, the contact roller was rotated without a driving source, so that the contact roller was subject to driving force from other members. The following problems arose when the information was communicated. () Since the driving force is transmitted by pressing the contact roller against the bobbin holder, the paper tube may burst due to the driving force transmitted to the contact roller, which is dangerous. In addition, in order to reduce the frequency of ruptures, it is necessary to use high-grade paper tubes, for example.
This increases running costs. () The driving force transmitted to the contact roller generates heat at the contact area between the contact roller and the package, and this heat can cause the yarn to become fused or change the quality of the yarn, causing dyeing spots. was inviting. () In an automatic winder, when the contact roller comes off the package during turret, the rotation speed of the contact roller decreases, and the thread being switched may become slack and break. As a result of intensive investigation into the causes of the above-mentioned problems, the inventor of the present invention found that the following problems were found between the rupture of the paper tube, the occurrence of filamentous unevenness, the number of package cages in contact with the contact roller, and the contact surface between the paper tube and the contact roller. We found the following relationship. To explain this based on Figures 8 and 9, Figure 8 shows data showing evaluation of yarn quality, and in the figure, the driving force of the contact roller is expressed as a parameter called load on the X axis (horizontal axis). (Specifically, the value obtained by dividing the driving force transmitted from the bobbin holder side to the contact roller by the number of packages in contact with the contact roller), and the Y-axis (vertical axis) is the value that evaluates the thread quality of the package at that time on a 5-level scale. I'm taking it.
In addition, the numerical value inside the circle in the same figure represents the number of packages corresponding to the evaluation when 10 packages were evaluated. Further, in the same figure, yarn quality evaluations of 3 to 5, shown in the shaded area, correspond to good yarns. On the other hand, Figure 9 shows data showing the time until the paper tube ruptures. In the figure, the X-axis is the value obtained by dividing the load driving the contact roller by the number of bobbins in contact with the contact roller, and the Y-axis is The time taken for paper tubes of the grades shown in Table 1 below to burst when each tube was operated at a speed of 6000 m/min was measured.

[Table] Here, the conditions for collecting each of the above data are as follows. The contact roller takes a winding form in which it contacts each bobbin at both ends of the bobbin, and at this time, the contact roller has a diameter slightly larger than the diameter at which it contacts the yarn. Note that the contact roller is not limited to this example, and even if the contact roller has a uniform diameter without a slightly larger diameter at both ends, for example, almost the same tendency will be exhibited. In addition, the contact pressure between the contact roller and the bobbin or package is determined by calculating the contact pressure value required for driving from the load required to drive the contact roller, and adding mechanical sliding resistance to this value. The contact pressure obtained is used for operation. Based on the above-mentioned relationship, the inventor set the transmitted load per package to a predetermined value (for example, 1.5Kgcm/
We were confident that it was possible to obtain the desired yarn quality by following the steps below (package). In this case, even if the yarn tube ruptures, if the usage limit is set to 1 minute or more, it is possible to use a paper tube with a transmission force of 1.5 Kgcm or less and a grade of 4000 m/min class. (Objectives of the Invention) In view of the above circumstances, the present invention aims to prevent paper tubes from bursting, improve thread quality, and reduce costs. (Means for Solving the Problems) In order to achieve the above-mentioned object, the method for driving a winding machine according to the present invention includes pressing a contact roller against a package to be wound on a bobbin holder, and increasing the number of revolutions of the contact roller or the tension of the yarn. When winding the yarn by controlling the contact roller to a predetermined value, the contact roller is driven by an induction motor, and the contact roller is controlled to have a predetermined value. The motor that drives the contact roller is designed to satisfy the relationship expressed by the following formula in its dead zone and based on the power supply frequency of the motor that drives the contact roller, the rotational speed of the contact roller, and the load torque of the contact roller. I try to drive. N=n ₁ +K・m(n ₀ −n ₁ )/T ₁ However, N: Number of revolutions of the contact roller when operating the contact roller in pressure contact with the bobbin holder [r.
pm] n ₀ : Synchronous rotation speed corresponding to the power supply frequency of the motor that drives the contact roller [rpm] n ₁ : Motor rotation speed when only the contact roller is driven by the motor that drives the contact roller [rpm] T ₁ : Load torque of the motor to drive only the contact roller [Kgcm] m: Number of packages wound up in contact with the contact roller K: Torque transmitted from the bobbin holder side to the contact roller [Kgcm] 0≦K≦1.5 ( Operation) In the present invention, the contact roller itself is driven by a separate induction motor, and the motor is operated in a dead zone and in an optimum operating range within a predetermined torque. Therefore, the force transmitted to each member due to the rotation of the contact roller becomes appropriate, thereby preventing the paper tube from bursting, improving yarn quality, and reducing running costs. (Example) Hereinafter, the present invention will be explained based on the drawings. 1 and 2 are diagrams showing a first embodiment of a winding machine to which a driving method according to the present invention is applied. First, the configuration will be explained. In FIG. 1, 1 is a turret table, and two bobbin holders 2 and 3 are disposed on the turret table 1. As shown in FIG.
The turret table 1 rotates half a turn in response to a turret command after yarn winding is completed, and the relative positions of the two bobbin holders 2 and 3 are exchanged. One bobbin holder 2 is equipped with four bobbins 4a to 4d, and the bobbins 4a to 4d rotate integrally with the bobbin holder 2. Further, yarn is wound around the bobbins 4a to 4d to form a so-called package 5a.
~5d are formed, and package cages 5a~5d
A contact roller 6 contacts and rotates, respectively. Similarly, four bobbins 7a to 7d are attached to the other bobbin holder 3.
d also rotates integrally with the bobbin holder 3. However, in this embodiment, the bobbins 7a to 7d are shown as being idle and on standby. In addition, in the following description, for convenience's sake, for example, package 5a to 5d will be simply replaced with package 5, and the same applies to other members. The bobbin holders 2 and 3 are connected to motors (induction motors) 10 and 1 via drive shafts 8 and 9, respectively.
1, and the contact roller 6 is also connected to a motor 13 via a drive shaft 12. Motor 10 is connected to inverter 22 via relay 21, and motor 11 is connected to inverter 24 via relay 23. On the other hand, the motor 13 is connected to inverters 22 and 2 via relays 25 and 26, respectively.
4 and is also connected to an inverter 28 via a relay 27. The above relay 21, 2
As 3, 25, 26, and 27, for example, electromagnetic switches or the like are used. Output control of each inverter 22, 24, 28 is performed based on commands from a controller 29, to which a signal from an electromagnetic pickup (detector) 30 is input. The electromagnetic pick-up 30 is disposed close to a gear 31 connected to the drive shaft 12 of the contact roller 6.
1 and indirectly detects the rotation speed of the contact roller 6. The controller 29 controls the activation of the contact roller 6 based on the detection signal from the electromagnetic pickup 30, the activation gradient when starting the bobbin holders 2 and 3, and the feedback of the rotation speed of the contact roller 6 when winding the yarn around the bobbins 4a to 4d. It provides optimal commands for control, etc., and the commands are sent to each inverter 22, 24, 2.
It is sent out at a signal level of 8. Note that the command setting to the inverter 28 is not limited to the example in which it is automatically performed by the controller 29, and may be performed manually, for example. Inverters 22, 24, 28 are controller 2
9 generates alternating current power with a frequency according to the command, and connects each predetermined relay 21, 23, 25, 2
6, 27 to the motors 10, 11, 13. Note that the inverter 28 is common to a plurality of winding machines, and is switched to the inverter 28 after the motor 13 is started by the inverter 22 or 24 for the bobbin holder. Here, the output frequency of the inverter 28 is set so that the rotational speed N of the contact roller 6 is within the optimum operating range expressed by the following equation. N=n ₁ +K・m(n ₀ −n ₁ )/T ₁ ... However, N: Number of revolutions [rpm] of the contact roller 6 when operating with the contact roller 6 pressed against the bobbin holder 2 [rpm] n ₀ : Contact Synchronous rotation speed [rpm] corresponding to the power supply frequency of the motor 13 that drives the roller 6 n ₁ : Rotation speed of the motor 13 when only the contact roller 6 is driven by the motor 13 that drives the contact roller 6 [rpm] T ₁ : Load torque of the motor 13 to drive only the contact roller 6 [Kgcm] m: Number of packages 5 that are wound up in contact with the contact roller 6, m=4 in this example K: Contact roller from the bobbin holder 2 side Torque transmitted to 6 [Kgcm] 0≦K≦1.5 Next, the operation will be explained. At startup, the contact rollers 6 are brought into pressure contact with the bobbins 4a to 4d mounted on the bobbin holder 2, and the relay 21 is closed to connect the inverter 22 and the motor 10, and the inverter 22 is started. At this time, the relay 26 is simultaneously closed to connect the inverter 24 and the motor 13. Therefore, by starting the inverter 22, the motor 10
However, due to the activation of the inverter 24, the motor 1
3 are activated at speeds corresponding to the output frequencies of the inverters 22 and 24, respectively, and start rotating. At this time of startup, the bobbins 4a to 4d and the contact roller 6 rise at the same startup gradient, and this startup gradient is set so that large torque does not act on the bobbins 4a to 4d that come into contact with the contact roller 6. Yarn Winder When the contact roller 6 starts to rotate at the predetermined starting gradient and stabilizes, the relay 26 is opened, the relay 27 is closed, and the inverter 28 drives the motor 13 to take up the yarn. At this time, the output frequency of the inverter 28 is set and controlled so that the rotational speed N of the contact roller 6 is within the optimum operating range shown by the above formula. This control state is expressed as the output torque (T) of the motor 13.
When expressed in terms of the relationship between and the rotational speed N, it becomes as shown in Fig. 2. In Fig. 2, point A is the contact roller 6.
This is the load T ₁ when only the motor 13 is driven by the motor 13, and the motor rotation speed at this time is n ₁ . Point C is the synchronous rotational speed with the power supply when only the contact roller 6 is driven by the motor 13, and is _n0 . Strictly speaking, the relationship between the motor output T and the rotational speed N is not a straight line between the spaces in the figure, but for the sake of simplicity, it is considered as a straight line. If the allowable torque is t [Kgcm], then t is expressed by the following equation. 0≦t≦1.5×m... Also, based on this allowable torque t, if we calculate the upper limit range _n2 of the rotation speed considering the appropriate load applied to the contact roller 6 from N= _n1 , we _{get n2.} corresponds to the rotation speed at point B and is calculated by the following formula. _n2 = _n1 + _n0 - _n1 / _T1 ×t... Therefore, the operating range at the allowable torque t is between _n1 and _n2 .
However, even in the direction from A to E, which is opposite to the side where the torque (T) of the motor 13 goes from A to B, there is a region where the torque acting on the package 5 or the bobbin 4 is the allowable torque t. However, bobbin holder 2
When controlling the rotation speed of the contact roller 6 or the tension of the yarn to a predetermined value, the rotation speed of the bobbin holder 2 is gradually lowered as the winding thickens. The torque of the motor 13 that drives the contact roller 6 acts on the motor 10 or 11 that drives the bobbin holder 2 against the torque when the number of rotations is lowered. The dead zone becomes large, which is not desirable. Therefore, the region in between is excluded from the optimum operating range. From the above, if the optimum operating range that satisfies the allowable torque t in consideration of the yarn quality etc. is limited by the rotational speed N of the contact roller 6, it will be between. That is, the range of n ₁ to n ₂ is expressed by the above formula. In this way, when only the contact roller 6 is operated by the motor 13, it is operated in the dead zone of the motor 13 and within a predetermined small torque range.
Contact roller 6 due to thickening of package 5
can be detected with high precision, and the influence of the motor 13 that drives the contact roller 6 on the motor 10 that drives the bobbin holder 2 is small, so that the responsiveness of yarn winding is increased and the control accuracy is also improved. Note that the rotational speed of the contact roller 6 is preferably set so that the value of K in the above equation falls within the range of 0≦K≦1.0. When the package 5 wound around the turret bobbin 4 reaches a predetermined winding amount corresponding to a full winding, first the relay 23 is closed and the motor 11 is started by the inverter 24, and then the turret table 1 is turreted. The yarn winding is switched by the switching method. When the switching is completed, the electromagnetic pickup 30 detects the rotation speed N of the contact roller 6, and the controller 29 controls the rotation of the motor 11 so that the speed of the yarn wound around the bobbin 3 reaches a predetermined value N. During this time, the motor 13 that drives the contact roller 6 is controlled by the inverter 28, and this continues until the winder stops. Based on the above effects, the effects of this embodiment will be compared with the conventional example from the viewpoints of problems () to (). Regarding (), although the contact roller 6 is in pressure contact with the bobbin 4, unlike the conventional method, the driving force for driving the contact roller 6 is set to the level of the driving force for speed control, and the contact roller 6 is operated within the optimum operating range shown by the above formula. Since the paper tube is rotated by the contact roller 6, the problem of the paper tube bursting due to the driving force transmitted to the contact roller 6 is eliminated, and safety can be improved. Furthermore, the grade of the paper tube can be lowered, resulting in lower running costs and cost reductions. Regarding (), since the driving force of the contact roller 6 is as small as the driving force for speed control, the situation where the yarn becomes fused or the yarn quality changes due to the driving force is eliminated, and quality is improved. . Furthermore, since the contact roller 6 itself is driven, the driving force transmitted from the bobbin 4 to the contact roller 6 can be small, and the yarn structure is not crushed by pressure contact, so that quality can be improved. Furthermore, since the driving force to the contact roller 6 is small, the pressing force can be reduced, the bulge on the end face of the package 5 can be reduced, and the winding appearance can be improved. Regarding () In the automatic winder, since there is no variation in the rotational speed of the contact roller 6 during the turret, the thread does not loosen during switching, and switching performance can be improved. Furthermore, the quality of the yarn in the turret is improved, making it possible to use the yarn during switching (during the turret), and making it possible to significantly reduce the generation of waste yarn. In this embodiment, the contact roller 6 is started using an inverter that supplies power to the motor 11 that drives the bobbin holder 3 on the backup side, but the invention is not limited to this. For example, the inverter for starting may be separately provided. After setting the contact roller 6 and starting the contact roller 6,
The contact roller 6 may be operated by an inverter that operates a plurality of winders. Furthermore, in the present invention, T ₁ in the above equation is expressed as the load torque of the motor 13, but this may be anything that is correlated with the torque, and may be replaced with the current value or slip rate of the motor 13, for example. Of course. Further, the present invention is not limited to implementation using a wire logic circuit as in the above embodiment, but can also be implemented using a microcomputer. Next, an example of its application will be shown as another embodiment. 3 and 4 are diagrams showing a second embodiment of a winder to which the driving method according to the present invention is applied, and this embodiment is an example of application to a manual winder. In the above embodiment, the contact roller and bobbin holder were started by contacting each other, but as described below, the contact roller and bobbin holder are separated from each other during startup, and a microcomputer is used to control the rotational speed of the contact roller alone during operation. It is also possible to calculate the optimal inverter frequency from this and the inverter frequency. In FIG. 3, power from an inverter 41 is supplied to the motor 13 that drives the contact roller 6, and power from an inverter 42 is supplied to the motor 10 that drives the bobbin holder 2. Note that the motor 10 does not necessarily have to be an induction motor.
The rotational speed _NCR of the contact roller 6 is detected by an electromagnetic pickup 30 arranged opposite to a gear 31 provided on the drive shaft 12, and the rotational speed NCR of the bobbin holder 2 is
N _B is detected by a pulse pickup 44 disposed opposite a gear 43 provided on the bobbin holder 2 . The output of each sensor 30, 44 is input to a microcomputer 45, and the output from a setting device 46 is further input to the microcomputer 45. The setting device 46 is used to set the yarn winding speed, the number of packages, etc., and these settings are input by, for example, an operator of the winding machine. Microcomputer 45 has CPU51, ROM
52, RAM 53, and I/O port 54. The CPU 51 takes in necessary external data according to the program written in the ROM 52, and processes values necessary for yarn winding control while exchanging data with the RAM 53. Then, the processed data is output to the I/O port 54 as necessary. Signals from the sensors 30 and 44 and the setting device 46 are input to the I/O port 54, and command signals to the inverters 41 and 42 are output from the I/O port 54. The ROM 52 stores execution programs and data for the CPU 51, and the RAM 53 temporarily stores external information and data used in calculations. FIG. 4 is a flowchart showing a winding control program executed by the microcomputer 45. This program is started by operating a push button to start the winder (step _P1 ). When the push button is operated, the process branches to P ₂ and P ₃ , and the contact roller (hereinafter simply referred to as
The rotation speed of the bobbin holder (hereinafter simply referred to as BH) 2 is controlled. First, the control of the contact roller 6 will be explained with reference to FIG. The contact roller 6 is activated at _P2 , and the output frequency _f1 of the inverter 41 is increased at a predetermined activation gradient at _P4 . As a result, the contact roller 6
approaches the winding speed while increasing the rotational speed. Next, at _P5 , the rotational speed _NCR of the contact roller 6 is read from the output of the electromagnetic pickup 30, and at _P6 , this is compared with a provisional predetermined rotational speed _n1 (= _n1 '). Here, n ₁ ' is set according to the winding speed and the diameter of the contact roller 6. P ₄ when N _CR ≠n ₁ ′
Return to , and when N _CR = n ₁ ′, proceed to P ₇ . At _P7 , the frequency _f1 of the inverter 41 is read, and at _P8 , a target value N' corresponding to the optimum operating range based on the above formula is calculated. At P ₉ , the target value N′ and
The output frequency f ₁ of the inverter 41 is operated to reduce the rotation of the contact roller 6 until the difference ΔN between n ₁ ′, that is, N _CR = n ₁ ′ − ΔN, and the rotation speed N of the contact roller 6 is decreased again at P ₁₀ . Load _CR . _P11
When N _CR ≠n ₁ ′−ΔN, return to P ₉ , and N _CR =n ₁ ′−
When it becomes ΔN, the output frequency of the inverter 41 becomes f ₁ at P ₁₂
hold at its current value. Then,
After the contact roller 6 and bobbin holder 2 are brought into contact in _P13 , the process proceeds to _P14 . In this way, a tentative n ₁ ' (the number of rotations of the contact roller for winding with respect to the set speed) is calculated according to the following equation, a tentative N' is determined from this, and ΔN is determined from N'-n ₁ '. here,
As shown in FIG. 5, since ΔN is very small, f ₁ is lowered from n ₀ ' to n ₀ considering that the torque characteristics of the motor 13 are almost similar even if shifted by the value of ΔN. n ₁ '=V/πD... However, D: Outer diameter of the contact roller 6 V: Winding speed Next, control of the bobbin holder 2 will be explained. When branching from step P ₁ and proceeding to P ₃ , first,
The bobbin holder 2 is started at _P3 , and the output frequency _f2 of the inverter 42 is increased at a predetermined starting gradient at _P15 . As a result, the bobbin holder 2 approaches the winding speed while increasing its rotational speed. Then,
Read the rotation speed N _B of bobbin holder 2 in P ₁₆ ,
This is compared with the predetermined rotation speed N _BO in P ₁₇ . Here,
N _BO is the rotational speed that serves as a guideline for bringing the bobbin holder 2 and contact roller 6 into contact, and an optimum value is set in advance. When N _B =≠N _BO , return to P ₁₅ , and when N _B = N _BO , proceed to P ₁₃ . After the bobbin holder 2 and the contact roller 6 are brought into smooth contact in this way, the feedback control of the motor 10 that drives the bobbin holder 2 is performed so that the rotation speed _NCR of the contact roller 6 reaches the target value N at _P14 . I do. This can be done, for example, while reading the rotation speed _NCR of the contact roller 6.
This is done by manipulating the output of the inverter 42 through PID control. As described above, the present invention can be implemented using a microcomputer, and the same effects as in the first embodiment can be obtained. 6 and 7 are diagrams showing a third embodiment of the present invention, and this embodiment is an example in which a plurality of winders are centrally controlled. In FIG. 6, each of the winders 61 to 63 has two inverters (represented by INV).
Winders 64 to 69 are arranged, and winders 61 to 6
Necessary sensor information and setting device 46 in 3;
Information from the separately installed inverter 70 is input to the microcomputer 45. The microcomputer 45 performs feedback control on the rotational speed _NCR of the contact roller 6 in accordance with an internal program in the same manner as in the second embodiment, and outputs a frequency command based on the control processing value to each inverter 64-70. FIG. 7 is a flowchart showing a winding control program. In this program, the winding speed V is first set in _P21 , and the output frequency _fV of the inverter 70 corresponding to this winding speed V is determined in _P22 . Here, _f70 is calculated from a value programmed in advance corresponding to the speed V set in _P21 . Next, in _P23 , the output frequency _f70 of the inverter 70 is set to this determined value _fV ( _f70 = _fV ), and in _P24 , the current output frequency _f70 is compared with the determined value _fV . When f ₇₀ ≠ f _V
Returning to P ₂₃ , when f ₇₀ = f _V , the process branches to both steps P ₂₅ and P ₂₆ and proceeds. In addition, steps P ₂₅ and P ₂₆
In addition to P ₂₄ , a route that goes through the push button operation process in P ₂₇ is added. Steps after _P25 are processes for starting the contact roller 6, and steps after _P26 are processes for starting the bobbin holder 2. First, in P ₂₅ , one inverter 64, 66,
The contact rollers 6 of each of the winders 61 to 63 are activated at step 68, and their output frequencies are increased at step _P28 . Next, in P ₂₉ , the rotation speed N _CR of the contact roller 6 is compared with the predetermined rotation speed n ₁ ,
When N _CR ≠ n ₁ , return to P ₂₈ , and when N _CR = n ₁ ,
At _P30 , the power supply from one of the inverters 64, 66, and 68 is stopped, and the power supply is switched to the inverter 70 (wiring not shown), and the process proceeds to _P31 . On the other hand, branching from the above step _P24 and proceeding to _P26 , the other inverter 65, 67, 69 starts the bobbin holder 2 of each winder 61-63 in _P26 , and increases the output frequency of these in _P33. let Next, the rotation speed of bobbin holder 2 is set at P ₃₄ .
Compare N _B with the specified rotation speed N _BO , and when N _B ≠ N _BO,
Return to P ₃₃ , and when N _B = N _BO , proceed to P ₃₁ . _P31 ,
The process of P ₃₂ is the same as steps P ₁₃ and P ₁₄ of the second embodiment.
It is similar to Therefore, this embodiment is based on the same idea as the first embodiment in that there is a command to the inverter 70, and has the advantage that a plurality of winders 61 to 63 can be efficiently controlled by one microcomputer 45. There is. In addition, in the third embodiment, three winders are used as a plurality of winders.
Although the example of the number of units is shown, it is not limited to this, and it is of course possible to control three or more units. Further, the motor for driving the contact roller may be either a normal type or a high resistance type motor. Furthermore, in addition to the above, there is a contact roller that is common to multiple winding machines, and after starting each contact roller with a startup inverter, the inverter that is common to multiple winding machines is switched to operate during winding. You can do it like this. (Effects) According to the present invention, the contact roller is driven independently and is driven within a predetermined optimum operating range, so that the force transmitted to each member as the contact roller rotates is appropriate. This makes it possible to prevent the paper tube from rupturing, improve thread quality, and reduce costs.

[Brief explanation of drawings]

1 and 2 are diagrams showing a first embodiment of a winding machine to which the driving method according to the present invention is applied. FIG. 1 is an overall configuration diagram thereof, and FIG. Diagram showing the relationship between output and rotation speed,
3 to 5 are diagrams showing a second embodiment of a winding machine to which the driving method according to the present invention is applied, FIG. 3 is an overall configuration diagram thereof, and FIG. 4 is a diagram showing a winding control program thereof. Flowchart, FIG. 5 is a characteristic diagram for explaining its operation, FIGS. 6 and 7 are diagrams showing a third embodiment of a winding machine to which the driving method according to the present invention is applied, and FIG. Its overall configuration is shown in Fig. 7, a flowchart showing its winding control program, and Fig. 8
The figure is a diagram showing the relationship between filament quality and load in order to explain the action of the present invention, and Figure 9 is a diagram showing the relationship between time until rupture and load in order to explain the action of the present invention. . 2, 3...Bobbin holder, 5...Package cage,
6... Contact roller, 10, 11, 13...
Motor, 22, 24, 28, 41, 42, 64~
70...Inverter, 29...Controller, 4
5...Microcomputer.

Claims (1)

[Claims] 1. A method for winding yarn by pressing a contact roller against a package to be wound on a bobbin holder and controlling the number of rotations of the contact roller or the tension of the yarn to a predetermined value. At the same time, the contact roller is driven by an induction motor, and when the contact roller is pressed into contact with the package and driven, the motor that drives the contact roller is driven in its dead zone and the contact roller is driven. A method for driving a winding machine, characterized in that the winding machine is operated so as to satisfy the relationship expressed by the following formula based on the power supply frequency of the motor, the rotational speed of the contact roller, and the load torque of the contact roller. N=n ₁ +K・m(n ₀ −n ₁ )/T ₁ However, N: Number of revolutions of the contact roller when operating the contact roller in pressure contact with the bobbin holder [r.
pm] n ₀ : Synchronous rotation speed corresponding to the power supply frequency of the motor that drives the contact roller [rpm] n ₁ : Motor rotation speed when only the contact roller is driven by the motor that drives the contact roller [rpm] T ₁ : Load torque of the motor to drive only the contact roller [Kgcm] m: Number of packages wound up in contact with the contact roller K: Torque transmitted from the bobbin holder side to the contact roller [Kgcm] 0≦K≦1.5