JPH0776462A - Thread feed control device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a yarn feed control device having extremely high response performance capable of instantaneously controlling the speed of a feeder even when the yarn feed level rises. [Structure] Feeder with roller directly connected to servo motor
And a servo driver for controlling the rotation speed of the roller,
A yarn feed control device comprising a signal source for giving a signal pattern for controlling the rotation speed of a feeder to the servo driver, wherein a feed source is provided from one signal source. − A signal pattern for controlling the rotation speed of the rotor
The response time of the feeders to the signal is set to 30 and the rotation speed of each feeder is input in parallel to the driver.
A yarn feed control device which is controlled at ms or less. A signal source may be incorporated into each servo driver.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn feed control device. More specifically, the present invention relates to a yarn feed controller for directly connecting a feeder to a servo motor and controlling the rotational speed of the feeder by a servo driver in accordance with a signal pattern. Is.

[0002]

2. Description of the Related Art Conventionally, in controlling the feed of a yarn, the speed of a plurality of feeders is controlled by using an inverter. One main motor has a pair of (top-bottom) rollers,
A yarn feeding device has been proposed in which the speed is controlled by a transmission / driving system such as a belt or a gear. This system is applied to, for example, a yarn processing machine, a linen yarn machine, a take-up machine, a drawing machine, and the like. Taking an example where the yarn feeder speed control of the yarn is applied to a yarn processing machine, when performing bulk processing on a filament yarn of synthetic fiber, the amount of feed under the bulk processing condition is instantly changed to There is a device that adds irregularity to the form of the textured yarn. Irregularization of the form of the bulky processed yarn is carried out for the purpose of adding new characteristics to the texture and surface change of the final product and increasing its added value as a product. Therefore, in order to increase the added value of the products and to make them more expensive, and to rationalize the production, it is necessary to control the rotation speed of the feeder roller at high speed and precisely at a variable speed. To be done.

For example, Japanese Unexamined Patent Publication No. 61-186544 proposes a device used for a variable speed yarn supplying method. This proposal is a feed device which uses an inverter to make the power motor of a feeder roller variable. In the case of this device, there is a large time delay (rise, fall) with respect to the variable speed signal, and variable speed becomes functionally difficult while the motor is rotating at high speed. The higher the yarn feed level, the more severe this tendency becomes and becomes a fatal problem.
It has not been resolved yet. Therefore, it is not suitable for adding new characteristics to the texture and surface change of the final product to increase the added value of the product and to reasonably realize the manufacturing process.

[0004]

SUMMARY OF THE INVENTION In view of the above points, an object of the present invention is to provide an extremely high responsiveness capable of instantaneously controlling the speed of a feeder, even if the feed level of the yarn is increased, and to manufacture the yarn. The present invention provides a yarn feed control device having a reasonable speed.

[0005]

SUMMARY OF THE INVENTION The present invention uses a feeder roller having a roller directly connected to a servo motor and a servo driver for controlling the rotation speed of the roller. A yarn feed controller for controlling the number of revolutions of the feeder by a servo driver according to a signal pattern and having the following structure.

That is, the invention of claim 1 is a servo system.
A feeder connected directly to a roller, a servo driver for controlling the rotational speed of the roller, and a signal pattern for controlling the rotational speed of the feeder to the servo driver. A yarn feed control device composed of a signal source that emits a signal, and a signal for controlling the number of rotations of a feeder from a single signal source is input in parallel to a plurality of servo drivers. Let
Further, the yarn feed control device is characterized in that the number of revolutions of each feeder is controlled so that the response time of the feeder to the signal is 30 ms or less.

According to a second aspect of the present invention, there is provided a feed roller having a roller directly connected to the servo motor, a servo driver for controlling the rotation speed of the roller, and the servo driver. Hui
A yarn feed control device comprising a signal source for issuing a signal pattern for controlling the rotation speed of a drawer,
A yarn feed control device characterized in that a signal source for controlling the rotational speed of a feeder is incorporated in the servo driver.

The present invention will be described in more detail below. First, the invention of claim 1 will be described. In the present invention, a feed controller is provided with a feed roller having a roller directly connected to a servo motor, a servo driver for controlling the rotation speed of the roller, and a rotation speed control. And a speed control signal from the signal source to the servo driver is input from one signal source to each of the plurality of servo drivers in parallel. is there. By doing so, it is possible to simultaneously control the number of revolutions of each of the plurality of feeders connected to each servo driver from one signal source through each of the plurality of servo drivers, depending on the signal.

Although it depends on the electric capacity of the signal generator of the signal source, one signal source can simultaneously control the rotation speed of several tens to several hundreds of feeder rollers depending on the signal. Therefore, for example, when the control device is mounted on the yarn processing machine, it is possible to simultaneously control one production machine or several production machines in accordance with signals. The number of feeders per production machine is generally composed of units such as 72 spindles, 144 spindles, and 216 spindles. Further, each hood roller can be speed-controlled extremely accurately at high speed in the range of 0 to 4000 rpm. It is preferable to use a computer as the signal source. By using the computer, the design of the signal pattern, the change of the signal pattern, the fine adjustment of the signal pattern can be easily operated, and the target feed amount can be precisely controlled.

In the present invention, the control accuracy is such that the response time of the feeder to the signal is 30 ms or less. For example, when the speed of the feeder is increased in a rectangular shape while rotating the feeder at a constant speed, the delay time or response time until reaching the speed of the signal is 15 ms or less. When the speed is reduced in a rectangular shape during rotation of the rotor, the delay time or response time until reaching the speed of the signal is also 15 ms or less, and the total delay time or response time is 30 ms or less. If it is more than 30ms, it will be a feedback for the signal.
The movement of the la becomes slow, and it becomes impossible to accurately control the speed at high speed. The response time (response performance) of the feeder to the signal is most dominated by the wattage of the servomotor. As the wattage increases, the rotational inertia of the servo motor itself increases, and the response performance decreases.
On the other hand, when the wattage is reduced, the rotational inertia of the servomotor itself is reduced and the response performance is improved, but the horsepower is reduced. Therefore, it is necessary to appropriately design the response time to be 30 ms or less while considering the horsepower. In order to control the speed with high accuracy, the analog type of voltage control is more practically preferable than the digital type of pulse train control, and the output number of the motor is small, 50 to 300 W.
It is suitable to use the servo motor of.

The shorter the response time delay, the more accurately the control can be performed at a high speed level, and the smaller the error. Therefore, as a concrete level, the response time (rise, rise,
It is preferable to design so that the fall) is 15 ms or less. For example, assuming that there is a response time delay of 10 ms, running the yarn at 300 m / min will result in 10 ms.
The length of the yarn corresponding to is 5 cm, and it is calculated that the uncontrollable area of 5 cm appears due to the delay in the response time of start-up and fall.

FIG. 1 is a system diagram showing a yarn feed control device according to the first aspect of the present invention. Reference numeral 1 is a signal generator for sending a signal to the servo driver. 7, 8,
Numerals 9 and 10 are servo drivers for controlling the rotation speed of the feeder. 15, 16, 17, and 18 are feeders
It is a servo motor that is directly connected to LA. The signal generated from the signal generator 1 passes through the cable 2, the cable 3,
Servo drivers 7, 8, 9, 10 via 4, 5, 6
Input in parallel. Further servo drivers 7, 8,
9 and 10 are control cables 1 based on the input signal.
Servomotors 15, 1 through 1, 12, 13, 14
6, 17, 18 are controlled to control the rotational speed of the feeder roller directly connected to the servomotor. Although FIG. 1 shows an example of a device for controlling one axis, a positioning type DC servo motor is used.
When a motor is used, two axes, three axes, and four axes can be controlled at the same time, but they are easily affected by other servomotors.

Next, the invention of claim 2 will be described.
According to the present invention, a feed control device is mounted on a servomotor.
And a servo driver for controlling the rotational speed of the roller, and a signal source for issuing a signal pattern for controlling the rotational speed of the feeder to the servo driver. And the signal source is incorporated in the servo driver. In this case, the signal source is temporarily stored in advance on a floppy disk, tape, IC card or the like as a signal pattern to be input to the servo driver, and then the servo signal is output.
Incorporate it into the body driver. This embedding itself can be performed by the method adopted in this type of device. The signal pattern input to the servo driver controls the rotation speed of the feeder. In this case, the stored signal pattern will be used as it is, so fine adjustment of the pattern is hardly possible, but the device is easy to handle and there are few failures.
There is an advantage that the cost of the device is low.

Further, the signal pattern to be inputted to the servo driver is changed for each servo driver and incorporated in each servo driver, and the rotational speed of each feeder is controlled by different patterns. You can also For example,
Drawer No. 1-No. 100 is A pattern, N
o. 101-No. 200 is a B pattern, No. 201
~ No. 300 is a C pattern, and it is possible to produce textured yarns having different textures and surface changes in the same production machine. Other DC type server for positioning
It is possible to simultaneously control the speed of the servo motor for two axes, three axes, and four axes from one servo driver by inputting a pulse train signal using the system of the motor. Although the number of revolutions can be controlled by the IC card, the number of input data is limited and it is difficult to change the input data easily. Therefore, the speed is controlled by the DC voltage input. Is practical.

Further, in the present invention, the control accuracy is preferably set such that the response time of the feeder to the signal is 30 ms or less. FIG. 2 is a system diagram showing a yarn feed control device according to the second aspect of the present invention. Servo driver 19 incorporating a signal pattern by IC card, etc.
Control cables 23, 24,
Servo motors 27, 28, 29, 3 via 25, 26
A 0-controlled feeder connected directly to this servo motor.
Control the rotation speed of LA. Although FIG. 2 shows an example of a device for controlling one axis, when a DC type servo motor for positioning is used, two axes, three axes and four axes can be controlled at the same time, but other servo motors can be controlled. Susceptible to interference.

Next, each member of the yarn feeding device according to the first and second aspects of the invention will be described. First, the feeder which is directly connected to the shaft of the servo motor will be described.
From the viewpoint of designing the feeder roller so as to reduce its load inertia, it is preferable that the feeder be lightweight and have a small diameter. The shape of the feeder is a non-conical shape with a hole on the side of the roller to reduce the volume for weight saving, or a cross-section with a continuous shape, a working shape, or a hollow shape. The shape of is suitable. As the constituent material of the feeder,
A1 is used as the main raw material, and a lightweight alloy containing Ni, Cr, and Mg is used. The surface of the alloy is a mirror-finished or satin-finished Cr plating to increase the friction resistance of the surface and prevent abrasion, and a fine ceramic powder on the surface. The one that has been burnt is suitable.
In addition, a composite material made of plastic as the main raw material, including carbon fiber, polyamide fiber, etc., hard plastic such as polybutylene terephthalate, hard-hard coated on the surface, plastic surface A material obtained by vapor deposition of Al, Ni, Cr, or the like is used.

The servo motor is a DC type servo motor.
, AC type servo motors, stepping motors, high frequency motors, inverter motors, linear motors and the like, but in the present invention, high response performance and durability It is preferable to use a DC type servo motor, an AC type servo motor or a stepping motor from the viewpoint of being excellent. The motor output is small, 50 to 300W
It is suitable to use the servo motor of. Servomo
The servo driver for controlling the rotation speed of the motor controls the speed of one servo motor, but the servo motor and the servo driver are of a pair type. With this paired type, even if the number of servo motors increases, the number of rotations of the feeder roller between the number of servo motors is not interfered with by other servo motors.

The signal generator for generating a signal that can set the rotation speed of the servo motor to a plurality of levels either steadily or unsteadily includes an arbitrary waveform generator, a programmable controller, and a personal computer. A waveform signal generator such as a computer or an oscillograph is used. In addition, for example, data obtained from a yarn thickness unevenness measuring device may be converted into an electric signal and used as a substitute for the signal.

FIG. 3 is a perspective view of the feed control device according to the present invention. 31 is a thread, 32 is a servo
, 33 is a feeder, 34 is a separate guide,
Reference numeral 35 is a cable for servo motor. When using this device, it is preferable to wind the yarn around the roller at least 360 degrees, that is, once or more, around the roller. It is not preferable because it slips. In addition, a nip roller (top roller) is provided to prevent slipping between the yarn and the feeder.
Is used to support the load resistance of the nipple roller.
It is not preferable because it gives a large amount to the motor.

FIG. 4 is a graph showing the speed control program pattern (a) and the actual speed (b) of the roller in the present invention. In FIG. 4, the horizontal axis represents time and the vertical axis represents the surface velocity of the roller. In (b), a indicates a delay in rising response time, and b indicates a delay in falling response time. In contrast to A, B, C, D, E, and F in (a), (b) corresponds to A ′, B ′, C ′, D ′, and
E'and F'are shown. Compared to (a), (b) has a delay in response time when the signal is a rectangular wave, but SI of “F”
N-wave or "D" trapezoidal wave causes almost no delay in response time.

[0021]

【Example】

Example 1 Eighteen 110 W AC type servo motors (R88M-R11030 manufactured by OMRON Corporation) were made to have 95% aluminum on the shaft.
A roller with a diameter of 50 mm and a weight of 37 g, which was made of a lightweight alloy of magnesium 5% (specific gravity 2.66) and whose surface was mirror-plated with Cr, was attached. Exchange service above
A total of 18 servo drivers were connected to each servo motor in order to control the rotation speed of the motor. The power supply to the 18 servo drivers is a servo driver power supply unit for 110 W (R88D-RB04 made by OMRON) (R88-R305 made by OMRON).
3 units were used. As a signal generator, a single arbitrary waveform generator (AG-1200 Yokogawa Electric Co., Ltd.) was used to assemble a yarn feed control device. As a result of operating the feeder under the following conditions, the response time delay is 4m at the start.
The response time delay of 8 ms in total, that is, s and the fall, was 4 ms, and extremely high performance characteristics were obtained. There was almost no delay in response time between the 18 feeders and rollers, and the variation in the number of revolutions was within 1%. Steady running speed 300 m / min Steady running time 100 ms Instantaneous speed up 450 m / min Instantaneous speed up time 10 ms (The speed is the surface speed of the roller) As described above, when the device of the present invention is used, 18 spindles The rotation speed of the drawer can be simultaneously controlled by one signal generator, and the response time (rise + fall time) is 10 ms or less, which is an extremely high response performance.

Example 2 When speed control was performed under the following conditions in the same apparatus as in Example 1, the response time delay showed a rise time of 5 ms and the fall time of 5 ms, showing a total response time delay of 10 ms. was gotten. Stopping speed 0 m / min Stopping time 100 ms Instantaneous speed up 300 m / min Instantaneous speed up time 10 ms As described above, when the device of the present invention is used, the response time delay is short and 20 ms or less even when the stop-acceleration is performed under the most severe conditions. Is.

Example 3 Using the same apparatus as in Example 1, C in FIG.
When speed control was performed under D, E, F system conditions, the response time delay was C ', D', E ', F'in B, and both rising and falling showed a response time delay of 1 ms or less, Very high performance characteristics were obtained. As described above, when the device of the present invention is used, the response time delay is extremely short and 1 ms or less when the signal waveform is SIN wave, triangular wave, trapezoidal wave or the like.

[0024]

The present invention provides a yarn feed control device,
A feeder connected directly to the servo motor, a servo driver for controlling the rotation speed of the roller, and a servo driver for controlling the rotation speed of the feeder. It is composed of a signal source that emits a signal pattern, and a signal pattern for controlling the rotation speed of the feeder is input from one signal source to a plurality of servo drivers in parallel. The rotation speed of each feeder can be simultaneously controlled by one signal generator, and the response time (rise + fall time) is 10 ms or less, and extremely high response performance can be obtained. . In addition, the conventional inverter
In the yarn feed control device for driving a plurality of rollers with one motor by the motor control, a response time delay of several seconds occurs. Further, in the present invention, a drive system is provided in which one servo motor is provided with one feeder, and a servo driver is provided for each servo motor. The drawers do not interfere with each other, and even if the servo drivers are stopped or operated, the speeds of other servo motors are not affected. Further, even if the load resistance is changed during the yarn feed control, the feed difference between the feeder and the roller does not occur because the pair control is performed. Further, in the present invention, when the signal source is incorporated in each servo driver,
There are advantages that the device is easy to handle, there are few failures, and the cost of the device is low.In addition, the signal pattern to be input to the servo driver is changed for each servo driver and incorporated into each servo driver. -Advantageously, it is possible to manufacture textured yarns having different textures and surface changes in the same production machine, in which the number of rotations of the drawer is controlled by different patterns.

[Brief description of drawings]

FIG. 1 is a system diagram of an example of a yarn feed control device of the present invention.

FIG. 2 is a system diagram of an example of a control device incorporating a speed control program pattern in the servo driver of the present invention.

FIG. 3 is a perspective view showing a process drawing in which a feeder is directly connected to a servo motor and a yarn is fed.

FIG. 4 is a speed control program pattern diagram.

[Explanation of symbols]

1 Signal Generator 2 Signal Cable 3-6 Servo Driver Cable 7-10 Servo Driver 11-14 Servo Motor Cable 15-18 Servo Motor 19-22 Signal Servo driver with built-in program 23 to 26 Cable for servo driver 27 to 30 Servo motor 31 Thread 32 Servo motor 31 Feeder roller 34 Separate guide 35 Servo motor Cable

Claims (2)

[Claims] 1. A feeder which directly connects a roller to a servo motor, a servo driver which controls the rotation speed of the roller, and a feeder which connects the servo driver to the servo driver. A yarn feed control device comprising a signal source for issuing a signal pattern for controlling the number of revolutions, wherein a single signal source feeds the yarn.
A signal pattern for controlling the rotation speed of the drawer is input in parallel to each of the plurality of servo drivers, and each feeder is connected.
The yarn speed of the yarn is controlled by controlling the number of revolutions of the rotor with a response time of the feeder to 30 ms or less.
Control device. 2. A feeder roller having a roller directly connected to the servo motor, a servo driver for controlling the rotation speed of the roller, and a feeder roller connected to the servo driver. A yarn feed control device comprising a signal source for issuing a signal pattern for controlling the number of revolutions, wherein a signal source for controlling the number of revolutions of a feeder is incorporated in the servo driver. A yarn feed control device.