JPH0676176B2 - Winding speed control method for fiber yarn winding machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a winding speed control method for a fiber yarn winding machine.
More specifically, the present invention relates to a winding speed control method for a fiber yarn winding machine, which is a winding machine for glass fibers and the like, in which the winding shaft, the winding drum, and the like have large diameters and the moment of inertia is large as a whole.

[Prior Art] Conventionally, winding machines for glass fiber, synthetic fiber, etc. have been well known. In these winding machines, since the winding diameter is small at the beginning of winding the yarn, the winding drum is rotated at a relatively high speed, and the winding diameter increases as the yarn is wound. It is necessary to reduce the number of rotations and to minimize the number of rotations at the final winding.

In these conventional winding speed control methods for winding machines, closed loop means by feedback control is generally adopted. That is, the prior art is provided with a rotation speed control means for giving a constant rotation speed to the spindle and the spindle motor, and a rotation speed detection means for detecting the rotation speed of the spindle, and set rotation speed set by the rotation speed control means. The difference between the number of revolutions and the number of revolutions detected by the revolution number detecting means is directly feedback-controlled.

Such a conventional technique is effective for a winding machine in which the winding amount of the yarn is not so large or the winding speed is not so high.

[Problems to be Solved by the Invention] However, in recent years, a winder for glass fiber or the like has a large diameter of a winding shaft, a spindle, or the like and has a high speed in order to improve productivity, save labor, and the like. As a result, a fiber yarn winding machine having a large moment of inertia has come to the fore, and in such a winding machine, it is difficult to precisely control the winding speed by the conventional winding control method. Came. If the control of the winding speed is disturbed, the yarns of the product may have uneven counts, which causes serious quality defects.

In order to solve the above-mentioned problems of the prior art, the present invention performs slight change control when the difference between the set rotation speed and the detected rotation speed is within a certain range, and performs large control when the difference exceeds a certain value. As a result, a technique for efficiently, accurately, and reliably converging the actual rotation speed to the set rotation speed in a short time is provided.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following constitution.

That is, the present invention comprises at least a spindle, a motor for rotating the spindle, a rotation speed control means for giving a set rotation speed to the motor, and a rotation speed detection means for detecting the rotation speed of the spindle. In the fiber yarn winding machine according to the present invention, when the difference between the set rotational speed set by the rotational speed control means and the detected rotational speed detected by the rotational speed detection means is within the range of 3 to 7 rpm, the set rotational speed is ± 0.3 to 0.8 times the difference between the detected rotation speed and the rotation speed control means, and when the difference between the set rotation speed and the detected rotation speed exceeds 7 rpm, the difference between the set rotation speed and the detected rotation speed is ± 1.5. A winding speed control method for a fiber yarn winding machine is characterized in that the actual rotation speed is controlled to converge to a set rotation speed by adding up to 2.5 times to the rotation speed control means.

In the above, rpm indicates the number of rotations per minute.

[Operation] In the present invention, when the difference between the set rotation speed and the detected rotation speed is within the range of 3 to 7 rpm, the difference between the set rotation speed and the detected rotation speed is ± 0.3.
~ 0.8 times the rotation speed control means, when the difference between the set rotation speed and the detected rotation speed exceeds 7 rpm, ± 1.5 ~ 2.5 times the difference between the set rotation speed and the detected rotation speed to the rotation speed control means By adding the values, the actual rotation speed can be controlled to converge to the set rotation speed efficiently, accurately and surely in a short time. The reason is that when the actual rotation speed greatly deviates from the set value, a large control value is added and it is taken into the set value range faster, and within a certain range where the actual rotation speed is close to the set rotation speed, more precise This is because a slight control value is added to control in the control range. That is, in a winder with a large moment of inertia and small load fluctuations, when rotating at a rotation speed close to the set value, it converges to the set rotation speed with a little control, but from the set value It is based on the physical principle that it is difficult to converge to the set value unless a larger control value is added when it is separated.

As a result, stable rotation control can be obtained in a winder having a large moment of inertia, a high-speed rotating body, and a small change in rotation speed with respect to a change in load.

EXAMPLES The method of the present invention will be described in detail below with reference to the drawings. The method of the present invention is not limited to the following examples.

FIG. 1 shows an example of the control method of the present invention. 1
Indicates a unit in which a spindle and a motor for rotating the spindle are integrated. Reference numeral 2 is an inverter, and 3 is an induction motor. A pulse generator 4 is provided after the induction motor 3 to detect the rotation speed of the spindle 1. In this case, there is no need to have a one-to-one relationship between one rotation speed and one parc.

A rotary generator may be used as the pulse generator 4. Reference numeral 5 is a rotation speed control means for giving a set rotation speed to the motor of the spindle. Reference numeral 6 is a rotation speed adding means.

In the above device, when the difference between the set rotation speed set by the rotation speed control means 5 and the detected rotation speed detected by the rotation speed detection means (pulse generator 4) is within the range of 3 to 7 rpm, the set rotation speed is set. ± 0.3 of the difference between the number and the detected rotation speed
~ 0.8 times the rotation speed control means, when the difference between the set rotation speed and the detected rotation speed exceeds 7 rpm, ± 1.5 ~ 2.5 times the difference between the set rotation speed and the detected rotation speed to the rotation speed control means Then, the actual rotation speed is controlled to converge to the set rotation speed.

Particularly preferably, when the difference between the set rotational speed set by the rotational speed control means 5 and the detected rotational speed detected by the rotational speed detection means (pulse generator 4) is within the range of 3 to 7 rpm, the set rotational speed is set. ± 0.5 of the difference between the number and the detected rotation speed
If the difference between the set rotation speed and the detected rotation speed exceeds 7 rpm, then ± 2 times the difference between the set rotation speed and the detected rotation speed is added to the rotation speed control means. The rotation speed is controlled to converge to the set rotation speed. When the difference between the set rotation speed and the actual detected rotation speed is less than 3 rpm, it is preferable not to change the control.

FIG. 2 shows a general relationship between the rotation speed N of the spindle and the winding time T for keeping the winding speed of the yarn constant.

That is, the relationship between T and N is (Where K is a constant). The above-described control is performed based on the difference between the rotation speed set by this arithmetic expression and the actual rotation speed (feedback value) detected by the detector.

FIG. 3 shows the rotational speed N of the spindle at the start of the present invention.
And the winding time T are shown. That is, since it is largely deviated from the set value A at the beginning of the start, for example, twice the difference between the set rotational speed and the detected rotational speed is added to the rotational speed control means, and the actual rotational speed is controlled to converge to the set rotational speed. Next, set speed A
Difference between the detected rotational speed and the After coming within the scope of 3～7Rpm (FIG. 3 B ₁ ~B _2), ± of the difference between the detected rotational speed and set rotational speed 0.
Five times is added to the rotation speed control means to control the actual rotation speed to converge to the set rotation speed. The set value A in FIG. 3 is actually the second value.
As shown in the figure, the curve descends to the right, but for the sake of explanation, it is a minute time.

Next, FIG. 4 shows an example of a specific configuration using the present invention. A spindle 11 around which a yarn (for example, a yarn spun by a spinning machine, cooled, treated with an oil, and optionally stretched to a desired degree) is driven to rotate by a spindle motor 12, and this spindle is rotated. The rotation speed of the motor 12 is detected by the rotation speed sensor 21. The traverse device 13 traverses the wound yarn along the spindle 11 and includes a traverse element 13A, a traverse cam 13B that reciprocates the traverse element 13A, and the traverse cam 1
It is composed of a traverse motor 14 that rotates 3B.

The traverse device 13 is separated from and brought into contact with the package by a separating motor 15 so that the traverse device 13 always has a constant distance from the surface of the package regardless of the package diameter. Traverse motor 14
The number of rotations is detected by a number-of-rotations sensor 22, and the winding diameter of a package formed by winding a thread on the spindle 11 is detected by a winding diameter sensor 23.

The control circuit 19 includes a CPU, ROM, RAM, input interface (I / I
O) is a circuit that includes a well-known microprocessor. Then, the spindle motor rotation speed Ns and the traverse motor rotation speed Nt are respectively calculated according to a detection signal from a winding diameter sensor (not shown), and the calculated rotation speed and the rotation speed detected by the rotation speed sensors 21 and 22 Depending on the deviation of the motor 12, 16
Controls 14 rpm. Further, the traveling motor 15 is controlled via the motor driver 18 according to the detection signal from the winding diameter sensor. Such a control circuit 19 has a winding angle, a wind ratio,
Keyboard for inputting various data such as yarn speed and winding time
24 is connected and the display 25 that displays various data
Are connected.

In the embodiment of the present invention described above, by incorporating the spindle 11 with the control means shown in FIG. 1, preferable winding control can be performed.

Although the present invention describes the winding of glass fibers, other yarns such as synthetic fibers can also be used. Particularly, the present invention is preferably applied to a winder for a glass fiber having a large winding shape at a high speed.

EFFECTS OF THE INVENTION In the present invention, the difference between the set rotation speed and the detected rotation speed is 3 to 7 rpm.
Within the range of, the difference between the set speed and the detected speed is ± 0.
When 3 to 0.8 times is added to the rotation speed control means and the difference between the set rotation speed and the detected rotation speed exceeds 7 rpm, the difference between the set rotation speed and the detected rotation speed ± 1.5 to 2.5 times is set to the rotation speed control means. By adding the values, the actual rotation speed could be controlled to converge to the set rotation speed efficiently, accurately and surely in a short time. The reason is that when the actual rotation speed greatly deviates from the set value, a large control value is added and it is taken into the set value range faster, and within a certain range where the actual rotation speed is close to the set rotation speed, more precise This is because a slight control value is added to control in the control range.

This makes it possible to obtain stable rotation control in a winder having a large moment of inertia, a high-speed rotating body, and a small change in rotation speed with respect to a change in load.

[Brief description of drawings]

FIG. 1 shows an example of the control method of the present invention. FIG. 2 shows a general relationship between the rotation speed N of the spindle and the winding time T for keeping the winding speed of the yarn constant. FIG. 3 shows the rotational speed N of the spindle at the start of the present invention.
And the winding time T are shown. FIG. 4 is another overall block diagram of the present invention. 1: Spindle and spindle motor 2: Inverter, 3: Induction motor 4: Pulse generator 5: Rotation speed control means, 6: Rotation speed addition means

Claims (1)

[Claims] 1. At least a spindle, a spindle motor for rotating the spindle, a rotation speed control means for giving a set rotation speed to the motor, and a rotation speed detection means for detecting the rotation speed of the winding drum. In the constructed fiber yarn winding machine, when the difference between the set rotation speed set by the rotation speed control means and the detected rotation speed detected by the rotation speed detection means is within the range of 3 to 7 rpm, the setting is performed. The difference between the rotational speed and the detected rotational speed ± 0.3 to 0.8 times is added to the rotational speed control means, and when the difference between the set rotational speed and the detected rotational speed exceeds 7 rpm, the difference between the set rotational speed and the detected rotational speed is A winding speed control method for a fiber yarn winding machine, characterized in that ± 1.5 to 2.5 times is added to the rotation speed control means to control the actual rotation speed to converge to a set rotation speed.