JPH0710376A - Winding control method - Google Patents

Abstract

PURPOSE:To make yarn windable into a desired form by means of merely detecting a span of winding time by driving both traverse and spindle drive units on the basis of traverse value and spindle speed at each winding time calculated in conformity with information in regard to the winding. CONSTITUTION:When a winding start command is inputted into an arithmetic circuit 14 and a timer 15, this timer 15 gets measuring a span of winding time as the elapsed time since the winding has started, and simultaneously this arithmetic circuit 14 is also starting its control operation. In addition, those of winding form, winding density, yarn unit weight and target yarn velocity are set to this arithmetic circuit 14 as information on the winding in advance, and on the basis of this information on the winding, traverse value and spindle speed at each time to be measured by the timer 15 are calculated. Thus, on the basis of the calculated traverse value and spindle seed, a traverse drive unit 5 and a spindle drive unit 11 are driven in this way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for winding a yarn on a spindle in a predetermined shape.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 61-19539 discloses a winding thickness detected from the initial rotation speed of a bobbin and the current rotation speed.
By calculating the traverse amount from this winding thickness,
The traverse drive device is driven based on the traverse amount. In the above technique, it is necessary to detect the spindle rotation speed, and it is necessary to control the spindle rotation speed so that the yarn speed becomes constant. Therefore, the yarn speed must be detected, and the configuration is There are problems that the yarn becomes complicated and that the yarn is easily damaged when a detecting member that comes into contact with the yarn is used to detect the yarn speed.

In Japanese Patent Laid-Open No. 60-258069, the running yarn length is integrated from the rotation amount of the length-measuring roller, the traverse amount is calculated from the integrated length, and the traverse device is constructed based on the traverse amount. Japanese Patent Application Laid-Open No. 4-371449 discloses driving, and calculates a traverse amount from the winding time,
The traverse device is driven based on the traverse amount. In these two techniques, the winding thickness is proportional to the traverse amount, but the traverse amount is not proportional to the winding time and the rotation amount. Therefore, the desired winding shape cannot be obtained.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to detect only the elapsed time from the start of winding to the present without detecting the yarn speed or the number of revolutions of the bobbin (spindle), and based on that, traverse control and Spindle rotation control is performed to solve the above-mentioned drawbacks of the prior art.

[0005]

According to the present invention, the yarn is wound around a spindle while being traversed along a rotationally driven spindle to form a yarn layer, and the yarn layer increases as the yarn layer increases. A winding method for reducing the traverse amount, in which the winding shape, the winding density, the unit weight of the yarn, and the target yarn speed are set in advance as information regarding winding, and the winding time is set during winding. The traverse amount and the spindle rotation speed are calculated for each winding time that is detected intermittently based on the above winding information, and the traverse drive device and spindle drive are calculated based on the calculated traverse amount and spindle rotation speed. Controls the device.

[0006]

EXAMPLE 1 In this example, a winding time T is detected at each end of a half traverse, that is, a forward stroke or a backward stroke of a reciprocating motion, and a yarn volume V wound up by the detected winding time T is wound. Calculated based on the information relating to the thread volume V, the winding diameter R is calculated from the yarn volume V, the traverse amount 1 and the spindle rotational speed n are calculated from the winding thickness h, and the calculated traverse amount 1 and the spindle rotational speed n are obtained. It is an example of driving a traverse device and a spindle device based on the above.

FIG. 1 shows an outline of the winding machine 1.
The yarn 2 to be wound up is guided by a yarn guide 3 from a yarn feeder (not shown) and wound around the outer periphery of the spindle 4. Here, the yarn guide 3 serves as a traverse drive device 5 and includes a traverse motor 6, gears 7, 8,
The feed screw shaft 9 and the feed screw nut 10 are reciprocally driven in a range of the maximum traverse length L in parallel with the axial direction of the spindle 4. Further, the spindle 4 is driven by the motor 12 of the spindle drive device 11 at a predetermined spindle rotation speed n.

A controller 13 is provided to drive the motor 6 and the motor 12. Control device 1
Reference numeral 3 denotes an arithmetic circuit 14 connected to the timer 15 and the setter 16, and a drive controller 1 for controlling the motor 6 with the traverse amount 1 as an output of the arithmetic circuit 14 as an input.
7. A drive controller 18 that controls the rotation of the motor 12 by inputting the spindle speed n as the output of the arithmetic circuit 14.
Is assembled by.

As an example, the drive controller 17 includes a commander 19, a pulse generator 20, and a polarity determiner 2 as shown in FIG.
1, deviation counter 22, D / A converter 23, drive circuit 2
4 and encoder 25.
The drive controller 18 is, for example, as shown in FIG.
It is assembled by a D / A converter 26, an addition point 27, a drive circuit 28, and a tacho-generator 29.

Next, FIG. 4 shows the sequence of traverse control and spindle rotation control according to the present invention. First, as information regarding desired winding in the setting device 16, the winding shape (conical angle θ, maximum length L of winding outer shape (traverse) in the axial direction of the spindle 4, spindle diameter d), winding density ρ (The yarn weight / unit volume related to the yarn supplying body when the yarn is wound, which is a value empirically obtained in advance), the yarn unit weight D such as denier, the target yarn speed vo, etc. are input, and further, The total weight of the yarn 2 to be wound on the spindle 4, that is, the yarn weight W is input. As a result, the information regarding the winding is set in the arithmetic circuit 14.

During the winding operation, the control operation is performed based on the steps of FIG. When the winding start command is input to the arithmetic circuit 14 and the timer 15, the timer 15 starts measuring the winding time T as the elapsed time from the start of winding. At the same time, the arithmetic circuit 14 also starts the control operation by the winding start command based on the flowchart of FIG.

Immediately after the control operation is started, the winding time T (= 0) is input from the timer 15, and the yarn volume V and the winding thickness h are input.
Is calculated, but both are still 0.

Further, the arithmetic circuit 14 calculates the traverse amount l as
It is output as the maximum length L of the set winding contour, and the spindle speed n (= no) is calculated by the formula [no = vo / π
d]. This traverse amount 1 (= L) is input to the command device 19 of the drive controller 17. The spindle speed n (= no) is determined by the D / A converter 2 of the drive controller 18.
It becomes 6 inputs.

Here, the arithmetic circuit 14 includes a drive controller 17
Wait for the input of the half traverse end signal e from. As the half-traverse end signal e, for example, a signal corresponding to the deviation 0 from the deviation counter 22 which is a component of the drive controller 17 is used. When the half traverse end signal e is input, the arithmetic circuit 14 receives the winding time T from the timer 15.
Enter.

When the winding time T is input, the arithmetic circuit 1
Reference numeral 4 indicates the detected winding time T and information on winding (winding density ρ, yarn unit weight T, target yarn speed vo)
The yarn volume V wound up during the winding time T from the denier and the denier D is calculated from the following formula (1), and then the winding thickness h is calculated from the yarn volume V and the winding-related information. Then, the traverse amount 1 and the spindle rotation speed n are calculated from the winding thickness h from the following equations (3) and (4).

Formula (2) is a formula determined based on the maximum length L of the winding outer shape in the axial direction of the spindle 4, the spindle diameter d, and the conical angle θ, and the volume V is of the winding thickness h. It is expressed by a cubic function. The winding thickness h is a winding thickness when the calculated yarn volume V is equalized to the input winding contour (maximum length L in the axial direction of the spindle 4, spindle diameter d, and conical angle θ). .
The winding thickness h is obtained by obtaining a real number solution for f (h) -V = 0 by a dichotomy which is one of approximate solution methods using a computer, for example. In this way, the arithmetic circuit 14 detects the winding time T each time the half traverse ends, calculates the winding thickness h of the wound yarn at the time when the winding time T elapses, and calculates the winding thickness h. The spindle rotational speed n for obtaining the corresponding traverse amount 1 and the yarn speed vo is calculated from h.

[0017]

[Equation 1]

[0018]

[Equation 2]

[0019]

[Equation 3]

[0020]

[Equation 4]

The obtained traverse amount 1 is input to the command unit 19 of the drive controller 17, and the spindle speed n is input to the D / A converter 26 of the drive controller 18. Then, as will be described later, when the drive controller 17 inputs the traverse amount l, the yarn guide 3
When the new traverse amount 1 is input next, the motor 6 is rotated in the forward direction so as to move forward by the traverse amount 1, and the motor 6 is reversely rotated so that the yarn guide 3 is moved back by the new traverse amount 1. . Further, the drive controller 18 is
By rotating at the input spindle speed n, the yarn 2 is always pulled out from the yarn feeder (not shown) at the target yarn speed vo. By repeating the above operation,
Thread weight calculated in the above process (D × vo × T)
When is equal to the set yarn weight W, the control operation is terminated and a stop signal is output to each drive controller 17, 18.

The detection of the timing for ending the control operation is not limited to the above, but may be performed as follows.

(1) Information on winding and yarn weight W
Then, the final traverse amount le is calculated in advance, and when the traverse amount 1 obtained in the course of the control operation becomes equal to the final traverse amount le, the control operation is terminated,
Output a stop signal. The final traverse amount le
Is the volume Ve when winding the yarn of the yarn weight W and the winding density ρ
When the volume Ve is adjusted to the input winding contour, the corresponding winding thickness he is calculated, and the traverse amount l at this time is obtained as the final traverse amount le from the above formula.

(2) Information on winding and yarn weight W
The required time Tm for winding the yarn of the yarn weight W is calculated from the above, and when the input winding time T becomes equal to the required time Tm, the control operation is ended and a stop signal is output. Here, the required time Tm is, for example, the expression [Tm = (W × 900
0) / D × vo]. In this case, it is preferable to display the required time Tm and also display the remaining time during winding, because the work status can be confirmed from the outside.

It should be noted that, without inputting the yarn weight W as information regarding winding, the operator simply looks at the winding diameter during the winding operation, and when the winding diameter becomes appropriate, the winding end time is set. It is also possible to externally operate so as to output a winding end signal based on the judgment. In that case, the arithmetic circuit 14 may display the current winding diameter during winding.

Here, the functions of the drive controllers 17 and 18 will be described. In the command device 19, the rotation speed of the motor 6 corresponding to the traverse speed (movement speed of the yarn guide) is set. The traverse speed may be a fixed fixed value, but it is desirable that the traverse speed is determined by information regarding winding, for example, the maximum length L of the traverse and the target yarn speed vo. The command unit 19 outputs a command signal corresponding to the traverse amount 1 input from the arithmetic circuit 14 and the set rotation speed of the motor 6 to the pulse generator 20.

The pulse generator 20 outputs a target rotation amount Po and rotation speed for rotationally driving the motor 6 as a pulse train signal based on the command signal. The pulse train signal gives the rotation amount of the motor 6 as the number of pulses and the rotation speed as the pulse frequency. The target rotation amount Po is the rotation amount of the motor 6 for moving the yarn guide 3 by the distance (traverse amount 1) at the set traverse speed. This pulse train signal is composed of a two-phase pulse train in order to correspond to the forward / reverse rotation of the motor 6, but instead of this, a single pulse train signal and another polarity corresponding to the rotation direction of the motor 6 are used. And a signal having

The pulse generator 20 inverts the polarity of the pulse train signal and outputs it every time a command signal is input from the command device 19. The next polarity determiner 21 determines the rotation direction of the motor 6 from the polarity of the pulse train signal, and outputs the target rotation amount Po to the addition terminal of the deviation counter 22 for positive rotation and to the subtraction terminal for reverse rotation. To do. Furthermore, the polarity determiner 21
Also determines the rotation direction of the motor 6 with respect to the feedback signal Pf indicating the rotation amount of the motor 6, for example, from the two-phase pulse train signal that constitutes the feedback signal Pf.

The feedback signal Pf is input to the subtraction terminal of the deviation counter 22 for normal rotation, and to the addition terminal for reverse rotation. Therefore, the deviation counter 22 outputs the deviation between the target rotation amount Po and the actual rotation amount Pf to the D / A converter 23 as a deviation signal. The deviation signal is converted into an analog amount and output to the drive circuit 24. Here, the drive circuit 24 inputs the analog signal and rotates the motor 6 at a predetermined speed until the deviation is eliminated.

In this way, when the traverse amount 1 is input from the arithmetic circuit 14, the drive controller 17 rotates the motor 6 so as to move the yarn guide 3 in the one direction by the traverse amount l. The arithmetic circuit 14 outputs a new traverse amount l to the commander 19 each time the half traverse ends.
Further, when the pulse generator 20 receives the command signal from the command device 19, the pulse generator 20 inverts the polarity of the pulse train signal corresponding to the new traverse amount l and outputs it. Therefore, the motor 6 reverses every time the traverse amount 1 is output from the arithmetic circuit 14, and rotates so as to move the yarn guide 3 by the traverse amount l.

Further, the drive controller 18 rotationally drives the motor 12 at the spindle speed n input from the arithmetic circuit 14. The spindle rotation speed n becomes an input of the D / A converter 26, and becomes an input of the drive circuit 28 via the addition point 27. Therefore, the drive circuit 28 rotates the motor 12 at a speed corresponding to the spindle rotation speed n. The rotation speed of the motor 12 is detected by the tacho-generator 29, and is additionally given to the point 27 as a feedback signal.

Before setting the information regarding the winding to the arithmetic circuit 14, the yarn 2 having the yarn weight W in the desired winding configuration (conical angle θ, maximum traverse length L) is set.
It is preferable to add to the arithmetic circuit 14 a function of judging whether or not winding of the tape is possible. For example, when the winding thickness h is (Ltan θ) / 2 from the yarn weight W, the winding shape (θ, L, d), the unit weight D of the yarn, and the winding density ρ, in other words, the winding shape is a triangle. If the calculated yarn weight is less than the set yarn weight, an alarm is output that the winding of the yarn weight W under the input winding shape is impossible, and a new winding shape Prompt for input. An upper limit value hm [hm <(Ltan θ) / 2] is set for the winding thickness h, and an alarm is issued when the calculated yarn weight when the winding thickness h is the upper limit value hm is smaller than the set yarn weight W. It is also possible to output and prompt input of a new winding shape.

In the above-described embodiment, in the control operation of the arithmetic circuit 14, the deviation counter 22 sets the input time of the winding time T.
Instead of inputting a signal corresponding to 0 deviation from, the arithmetic circuit has a pulse counter function and a comparison function, the feedback signal Pf of the drive motor 6 is input, and the rotation amount of the motor 6 is calculated last time. Traverse amount l
The winding time T may be input when it becomes equal to the value corresponding to. In the above embodiment, the arithmetic circuit 14 inputs the winding time T in synchronism with the traverse to calculate the traverse amount 1 and the spindle rotation speed n, and synchronizes these with the drive controllers 17,
However, instead of this, the arithmetic circuit 14 inputs the winding time T from the timer 15 every predetermined time period from the start of winding, for example, every 1 second, and each time. The traverse amount 1 and the spindle rotation speed n may be calculated and sequentially output to the command device 19 and the D / A converter 26, respectively. At this time, the commander 19 and the D / A
The converter 26 receives the half traverse end signal e in addition to the arithmetic circuit 14, and until the next half traverse end signal e is input, the traverse amount 1 and the spindle rotation speed output from the arithmetic circuit 14 are input. When the half traverse end signal e is input without capturing n, the value output from the arithmetic circuit 14 at that time is captured, and the command signal is output based on that value. Regarding the D / A converter 26, the half traverse end signal e is not input,
Each time the spindle speed n is input from the arithmetic circuit 14,
The rotation speed of the motor 12 may be changed.

Instead of keeping the conical angle θ constant at all times during winding (tapering on a straight line), it changes at a predetermined rate during winding [curved taper: θ = f (h)]. Good. At this time, the arithmetic circuit 14 calculates the winding thickness h based on the calculated volume V and the set winding shape (θ, L, d) in the course of the control operation.

[0035]

Second Embodiment In this embodiment, a function of the winding time T and the traverse amount 1 and a function of the winding time T and the spindle rotational speed n are calculated in advance based on the information about the winding and detected. The traverse amount 1 and the spindle speed n corresponding to the taken-up winding time T are shown in (1) of FIG. 5 and FIG.
In the example in which the traverse device 5 is driven based on the calculated traverse amount 1 based on the function (2), and the spindle drive device 11 is driven based on the determined spindle speed n. is there. In the case of this embodiment, since necessary data is set in advance, the number of calculations required during the control operation is reduced, and the load on the control device 13 can be reduced. Also in this embodiment, the winding time T may be detected in synchronization with the traverse, or may be detected at predetermined time intervals.

Further, in the above embodiment, the drive controller 17
, The motor 6 is rotated by a half traverse based on the traverse amount l, but the present invention is not limited to this, and when the traverse amount l is input, the motor 6 is rotated in the normal direction and the rotation amount corresponding to the traverse amount l. You may make it reverse. That is, the yarn guide 3 may be moved back and forth by the traverse amount l. In this case, the traverse amount 1 is input for each round trip.

Further, in the above embodiment, the winding density is directly set in the arithmetic circuit 14 by inputting the winding density into the setting device 16. However, instead of this, for example, the winding density is the yarn type and the winding tension. If determined by
By storing a plurality of winding densities for each yarn type and winding tension in the arithmetic circuit 14 in advance and inputting the yarn type and winding tension, the arithmetic circuit 14 reads out the corresponding winding density and May be set as information regarding winding.

[0038]

According to the present invention, the yarn can be wound in a desired shape by simply detecting only the winding time without providing a yarn speed detecting sensor, a winding diameter sensor, or the like.

[Brief description of drawings]

FIG. 1 is a block diagram of a winding machine.

FIG. 2 is a block diagram of a drive controller.

FIG. 3 is a block diagram of a drive controller.

FIG. 4 is a flowchart of a control method.

FIG. 5 is an explanatory diagram of a winding shape.

FIG. 6 is a graph showing a relationship between (1) a winding time and a traverse amount, and (2) a graph showing a relationship between a winding time and a spindle rotation speed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winder 2 Thread 3 Yarn guide 4 Spindle 5 Traverse drive device 11 Spindle drive device 12 Motor 13 Control device 14 Arithmetic circuit 15 Timing device 16 Setting device 17 Drive controller 18 Drive controller

Claims (1)

[Claims] 1. A winding method in which a yarn is wound on a spindle while being traversed along a rotationally driven spindle to form a yarn layer, and the traverse amount of the yarn is reduced as the number of yarn layers increases. The winding shape, the winding density, the unit weight of the yarn, and the target yarn speed are set in advance as information regarding winding, the winding time is detected during winding, and based on the above information regarding winding. A winding control method, wherein a traverse amount and a spindle rotation speed are obtained for each detected winding time, and the traverse drive device and the spindle drive device are driven based on the obtained traverse amount and spindle rotation speed.