JPH1136149A - Control system for draw false-twist texturing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject system designed to use inverters in the respective equipments of a yarn travel system and enable these inverters and the other control equipments to be controlled collectively. SOLUTION: This control system has a collective control unit 1 having a system bus 3, a plurality of serial communication lines 21, 31 connected to the system bus 3, a plurality of yarn travel system inverters (controllers) 23-28 mutually connected in series via the serial communication line 21 and related to one another, and a plurality of heater controllers 321 -329 mutually connected in series via the serial communication line 31 and related to one another.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system for a draw false twisting machine for drawing and twisting a multifilament yarn such as POY and winding it into a winding package.

[0002]

2. Description of the Related Art FIG. 8 shows a typical example of a device arrangement of one weight of a draw false twisting machine. FIG. 8 shows one weight on the R side of the drawing false twisting machine. Weights having such a device arrangement are arranged symmetrically, and are further arranged in rows in the thickness direction of the paper.
It becomes 16 weights.

[0003] In the drawing, a yarn Y from a yarn supply package supported by a creel stand (not shown) and wound with a multifilament yarn such as polyester or nylon is supplied to a first yarn.
It is pulled out by the feed roller FR1. Y from the first feed roller FR1 is introduced into the primary heater H1. The yarn Y coming out of the primary heater H1 reaches a second feed roller FR2 via a false twist device TW such as a nip twister. The yarn upstream of the false twist device TW is in a twisted state, and the twist given by the false twist device TW is the first feed roller FR1.
The twist is thermally fixed by the primary heater H1. The yarn downstream of the false twist device TW is in an untwisted state. The second feed roller FR2 is rotating faster than the first feed roller FR1, and the yarn is drawn simultaneously with the false twist of the yarn. The stretching ratio DR is the surface speed of FR2 / F.
It is determined by the surface speed of R1. The yarn speed YS is determined by the surface speed of the second feed roller FR2.

[0004] The yarn after the second feed roller FR2 is heat-treated as necessary by the secondary heater H2, and is wound on a winding bobbin which rotates by being in contact with the winding roller WR via the third feed roller FR3. Secondary heater H2
The second yarn determined by the formula of ((surface speed of FR2−surface speed of FR3) × 100 / surface speed of FR2)
Sent at overfeed rate. Further, the yarn sent to the winding roller WR is “(surface speed of FR2−WR
Surface speed) × 100 / surface speed of FR2 ”.

[0005] The false twist device TW disposed before the second feed roller FR2 is driven based on the surface speed of the second feed roller FR2, and the oiling device OIL disposed before the winding roller WR is driven by the surface of the winding roller WR. Driven on a speed basis.

Thus, the first feed roller FR1 →
The rotary devices of the yarn running system of the false twist device TW → second feed roller FR2 → third feed roller FR3 → oiling device OIL → winding roller WR are driven as a series while maintaining a predetermined surface speed. . When the operating conditions of the yarn change, each rotating device of the yarn traveling drive system needs to change the surface speed in conjunction therewith. Therefore, the driving force from the variable speed motor driven by one inverter is branched via the timing belt device to drive each rotating device of the yarn traveling system, and the change pulley changes the speed difference between the rotating devices. That is being done.

However, the traverse device TR may change the traverse speed separately from the yarn speed in order to wind the package at a predetermined twill angle. Therefore, it is driven by a variable speed motor driven by an inverter separately from the rotating device of the yarn traveling system. IAD is a doffing device for each weight provided in each of the winding devices.

[0008]

However, when the speed difference between the rotary devices of the yarn traveling system is changed by the change pulley, the setup is changed based on the change pulley table. For this reason, there has been a problem that errors are likely to occur and it takes time to change the setup.

In view of the above, each rotating device of the yarn traveling system is driven by a variable speed motor driven by an inverter, and these rotating devices are controlled by a centralized control device to change the speed difference between the rotating devices of the yarn traveling system. May be automatically performed. However, since the number of the inverters of the yarn traveling system is large, if they are connected in parallel to the central control device, the connection of other control devices may be restricted. Further, if priority is given to connection of other control devices to the centralized control device, there is a problem that not all of the yarn traveling system inverters can be connected.

The present invention has been made in view of the above problems, and an object of the present invention is to use an inverter for each rotating device of the yarn traveling system, and collectively integrate these inverters and other control devices. An object of the present invention is to provide a control system of a draw false twister that can be controlled.

[0011]

According to the first aspect of the present invention,
A centralized control device having a system bus, a plurality of serial communication lines connected to the system bus, and a plurality of related controllers serially connected via the serial communication lines.

According to a second aspect of the present invention, in the first aspect of the invention, a plurality of yarn traveling system inverters are connected in series to the system bus via a first serial communication line, and a second serial communication line is provided. Are connected in series through the heater.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the acceleration / deceleration time of each of the plurality of yarn traveling system inverters is unified, and a speed change signal is simultaneously sent to these inverters simultaneously. Connect the speed change signal line that sends out

According to a fourth aspect of the present invention, in the second or third aspect, a traverse inverter connected to the first serial communication line and a traverse width changing edge controller connected to the system bus are provided. Furthermore, the traverse inverter has a disturb function of periodically changing the traverse speed, and the traverse inverter changes the traverse speed by a synchronization signal line from the traverse width changing edge controller.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a connection state of each device in a control system for a draw false twisting machine according to the present embodiment. The equipment configuration of the drawing false twisting machine is the same as that of FIG.

In FIG. 1, reference numeral 1 denotes a central control device,
2 is a central processing unit, 3 is a system bus from the central processing unit, 4 is a first serial communication device connected to the system bus 3, 5 is a second serial communication device connected to the system bus 3, 6 is a system bus 3 is a third serial communication device connected to the system bus 3, 7 is a fourth serial communication device connected to the system bus 3, 8 is a first input / output device connected to the system bus 3, and 9 is connected to the system bus 3. The second input / output device 10 is a pulse counter connected to the system bus 3, and 11 is an LCD controller connected to the system bus 3. A sheet key 12 is connected to the central processing unit (CPU), and an LCD 1 is connected to the LCD controller 11.
3 are connected. The centralized control device 1 is configured by the above devices.

A first serial communication line 21 is connected to the first serial communication device 4.
Through the inverter 2 for the first feed roller FR1
3, the second feed roller FR2 inverter 24, the third
A plurality of inverters 22 related to each other as a yarn traveling system of the inverter 25 for the feed roller FR3, the inverter 26 for the winding roller WR, the inverter 27 for the false twisting device TW, and the inverter 28 for the oiling device OIL.
(Controller) is directly connected. Further, in addition to the plurality of inverters 22 (controllers) for the yarn traveling system, a traverse TR inverter 29 (controller) is also provided as the first
It is connected to the serial communication line 21 in series. This first
The speed setting and the acceleration / deceleration time setting are sequentially output to the inverters 22 and 29 via the serial communication line 21, and the alarm signals and the operation information (frequency, current, voltage, etc.) are sequentially input from the inverters 22 and 29.

Further, in particular, a plurality of inverters 2 of the yarn traveling system
The first input / output device 8 outputs a speed change signal to each inverter (controller) 2 via a speed change signal line f1.

A plurality of heater controllers 3 are connected to the second serial communication device 5 through a second serial communication line 31.
1 is connected. The plurality of heater controllers 31
Each span in which the second weight to the one set consisting of a total of nine 32 _{1-32 9} temperature adjustable heater controller. The second serial communication line 31, the heater controller 32 _{1-32 9} to the temperature setting, the control constants such as PID constant, the allowable temperature range is output in order, the heater temperature from the heater controller 31 _{1-31 9,} temperature alarm, Control abnormality information is sequentially input.

The third serial communication device 6 is connected via a third serial communication line 33 to a traverse width changing edge controller 34 for changing the traverse width in a wide and narrow manner to prevent ear height. The edge controller 34 reciprocates the servo motor 36 via the servo motor driver 35. With this third serial communication line 33,
The operation mode setting and the parameter setting are sequentially output to the edge controller 34.

The fourth serial communication device 7 is connected via a fourth serial communication line 37 to a controller 38 for each R-side doffing device IAD and a controller 39 for each L-side doffing device IAD. . This fourth serial communication line 37
As a result, the full filling time setting, the small bead winding time setting, and the operation mode (sequential or random) are output to the IAD controllers 38 and 39. The first, second, and fourth serial communication lines 21, 31, and 37 can perform one-to-many communication.
The third serial communication line 33 is for one-to-one communication.

The pulse counter 10 includes a first feed roller FR1, a second feed roller FR2, a third feed roller FR3, a winding roller WR, a false twist device T
W is to sequentially count pulses of a rotation member of the yarn traveling system of the oiling device OIL and a rotation detection sensor provided in the traverse device TR, thereby enabling feedback control of the rotation speed.

The second input / output device 9 receives an input of an operation switch from the sheet key 12 and displays a machine alarm or an alarm output on the LCD 13.

According to the centralized control device 1 described above, six yarn traveling system inverters 23 to 28 and one traverse TR
Connected to the system bus 3 via the first serial communication line 21 and the nine heater controllers 32
Since the _{1-32 9} configured to connect the second serial communication line 31 can be connected, including other control devices 34,38,39 to the system bus 3, can be collectively controlled in draw texturing machine become.

When a plurality of inverters 22 of the yarn traveling system are connected to a serial communication line 21 as shown in FIG. 1 and speed change commands are sequentially given to the inverters 23 to 28 by communication, the inverters 23 to 28 It is necessary to carry out reciprocal communication sequentially and individually. Therefore, there is a time difference between acceleration and deceleration of the rotating member of the yarn traveling system, and there is a possibility that the yarn may be excessively pulled or loosened. A flow of changing the yarn speed that can prevent this will be described with reference to FIG. This flow is stored in the memory of the central processing unit 2 as a control program.

In FIG. 2, the speed change signal line f is always
When the signal 1 (see FIG. 1) is turned off, the yarn speed is changed to simplify the program. The yarn speed may be alternately changed by turning on and off the signal of the speed change signal line f1.

The flow starts by obtaining the target frequency in the plurality of inverters 22 of the yarn traveling system (S).
1). Next, the acceleration / deceleration time of each rotating member of the yarn traveling system by the inverter is obtained. The acceleration / deceleration time of the inverter 22 is set to be the same as the acceleration / deceleration time of the second feed roller FR2 which requires a large load and takes a long time. Ask (S
2). The acceleration (deceleration) time of the inverter is defined as the time from when the inverter is stopped to when the inverter reaches the maximum frequency. In order to adjust the rise time by each rotating member, each inverter may set an acceleration / deceleration time determined by the following equation (1).

Inverter acceleration time setting [sec] = rise time [sec] (set acceleration / deceleration time) × (maximum frequency / operating frequency (target frequency)) (1)

Next, the second speed of each inverter 22 is selected by turning on the signal of the speed change signal line f1 (S).
3). Here, since the second speed is the same as the first speed and only stores the set value, there is no speed change at that time. Next, the first speed of each inverter 22 is updated by communication through the first serial communication line 21 (see FIG. 1) (S4), and the acceleration / deceleration time of each inverter 22 is calculated by the equation (1) ( S5). Next, the speed change signal f1 (see FIG. 1) is turned off and the first
A speed is selected (S6). At this point, the speed change of each inverter is started. Each of the inverters 22 is communicated by the first serial communication line 21 (see FIG. 1).
The second speed setting is updated to be the same as the updated first speed to prepare for the next speed change (S7), and the flow ends.

As described above, the rotational members (FR1, FR3, WR, TW, OI) of the other yarn traveling systems disposed on the yarn path are set on the basis of the acceleration / deceleration time of the second feed roller FR2.
L) is automatically set to the same value.
Thus, even when the speed is changed by communication via the serial communication line 21, the acceleration / deceleration time of the rotating member of the yarn traveling system is adjusted, and the serial communication line 21 is turned on / off simultaneously by turning on / off the signal of another speed change signal line f1. The rotating member of the traveling system can be driven. As a result, there is no acceleration / deceleration time difference in each of the rotating members of the yarn traveling system, and excessive tension and slack do not occur in the yarn. The traverse device T
Since R is not for the yarn traveling system but for traverse, it is not always necessary to set the same acceleration / deceleration time as that of the rotating member of the yarn traveling system. Therefore, the speed change signal f1 is not input. It can also be configured.

The traverse inverter 29 has a function of accelerating and decelerating in accordance with the yarn speed and maintaining a predetermined twill angle. However, since a simple reciprocating drive generates a ribbon, it has a disturb function for breaking the ribbon. This disturb function periodically changes the traverse speed between a first speed (high speed) and a second speed (low speed).

In order to prevent the ears at both ends of the traverse width from changing, the direction of the traverse guide in which the servo motor 36 (see FIG. 1) reciprocates may be changed in order to periodically change the traverse width. It has a creeping function that can be performed. The servo motor 36 is controlled by an edge controller 34 (see FIG. 1).

If the disturb function due to the periodic fluctuation of the traverse speed and the creeping function for periodically changing the traverse width are executed independently, a bleeding occurs, and it is necessary to match the periods of both functions. Therefore, the traverse TR from the edge controller 34 in FIG.
Signal line f2 for speed switching to inverter 29
Outputs a synchronization signal. FIG. 3A shows only the circuit configuration. A synchronization signal is output from the edge controller 34 to the traverse TR inverter 29 via the synchronization signal line f2.

FIG. 3B1 shows a pulse-like synchronization signal. The traverse speed in FIG. 3 (B2) periodically changes between a first speed and a second speed according to a command from the central control device 1. The timing of the change is determined by a pulse-like synchronization signal. When the pulse of the synchronization signal is turned on, it goes to the first speed, and when the pulse of the synchronization signal is turned off, it goes to the second speed. The synchronization signal of the synchronization signal line f2 is output based on the output waveform of the edge controller 34 in FIG.
The pulse of the synchronization signal is turned on at the middle of the stop when the traverse width is not changed, and the pulse of the synchronization signal is turned off at the center of the operation of changing the traverse width to narrow it.

FIG. 4 shows a specific example of a traverse width change by the creeping function of the edge controller 34. FIG. 4A alternately shows a stop time when the traverse width is not changed and an operation time when the traverse width is changed to a V-shape. In this case, a synchronizing signal on the synchronizing signal line f2 is output from the edge controller 34 to the traverse TR inverter 29 for disturbing the traverse speed at the time of stopping and increasing the traverse speed at the time of operation. FIG. 4B shows that the traverse width is changed and not changed during one reciprocation of the traverse. Further, when the changes in the traverse width in half during one reciprocation are joined, a V-shaped jagged shape is obtained. Also in this case, the synchronization signal line f2 is set so that the traverse speed is increased when the traverse width is narrow and is decreased when the traverse width is wide.
From the edge controller 34 to the traverse T
It is output to the inverter 29 for R.

Since the R-side IAD controller 38 and the L-side IAD controller 39 are connected to the fourth serial communication line 37, the doffing interval of each weight is also controlled by the central controller 1.
Can be changed by the communication by. In addition, there are two types of doffing methods, and either one can be selected. The first method is
This is a mode called a sequential mode, in which doffing is performed in order from the end weight, and a method of waiting when a yarn break occurs in the middle. The second method is called random mode,
Regardless of the position of the weight, when a full or half package is generated, the doffing is immediately performed without waiting.

When the setting of the doffing interval is changed by selecting the sequential mode, when the doffing has not started and the changed set value (doffing interval) is on the L side, the first weight is set. The program of the central control unit 1 is written so that it can be changed when it is longer than the current winding time of the 109th spindle. Because RL
Start at the same time, and from the 1st weight on the R side to the 109th weight, and from the 110th weight on the L side to the 1st weight in order, the first weight on the L side and the 109th weight on the R side The eye is that the package diameter is the largest.

When the setting of the doffing interval is changed by selecting the random mode, the condition that can be changed when the changed setting value (doffing interval) is larger than the setting value before the change is written in the program of the central control unit 1. I have.

Thus, the IAD controller 38,
When 39 is also connected to the central controller 1 via the fourth serial communication line 37, the setting of the doffing interval can be changed together with the selection of the sequential mode or the random mode.

Further, by connecting a number of heater controllers 32 via the second serial communication line 31,
Batch setting of output information in which the classification of heater units (all nine units) or spans (each of nine units) is changed becomes possible.

As described above, a large number of inverters 2
3 to 29 are connected to the central control device 1 via the serial communication line 21 so that control alarms and operation information can be obtained. Similarly, many heater controllers 32 are connected to the central control device 1 via the serial communication line 31. And
Heater temperature, temperature alarm and control abnormality are obtained. The output of a rotation detection sensor provided on the rotating member of each inverter is output by a pulse counter 10.
It is a configuration counted by. Therefore, the central control device 1
Can provide display data from which various driving conditions can be grasped.

FIG. 5A is a display example showing the operation state of the traverse device, and FIG. 5B is a display example showing the operation state of the rotating member of the yarn traveling system. In FIG. 5A, various indices as shown are displayed separately for the traverse disturb function and the creeping function. FIG. 5 (2)
In, various indexes of the draw false twisting are displayed based on the rotation speed of the rotating member of the yarn traveling system. Here, FIG.
In (2), not only the current value but also the maximum value and the minimum value so far are displayed side by side, so that the fluctuation status of each data can be checked and confirmed.

FIG. 6 is a display example in which the operating states of all the heaters of the left and right (LR) machines can be seen at a glance. It can be seen at a glance where the alarm is displayed in the span of the primary heater number 1 to 9 on the L side.

FIG. 7 shows an example of an alarm display.
It is possible to switch between the first display example of (1) and the second display example of FIG. 7 (2). The type of alarm is indicated by a code number. In particular, as shown in FIG. 7A, an alarm history including an alarm occurrence period is displayed. By displaying the alarm history, if the winding is not stopped even if an alarm occurs, it is possible to know how long the winding has been continued while the alarm is being generated, and evaluate the yarn quality of the wound package. Can be used for If the winding is stopped when an alarm occurs, the alarm history simply indicates the idle time.

In the above-described embodiment, the case where the inverter is used for all the rotating members of the yarn traveling system has been described. However, the first feed roller FR1, the second feed roller FR2, and the third feed roller FR3 are not described. The pulling roller can be driven from a fixed speed main motor by a timing belt drive.
The present invention is also applicable to a draw false twisting machine in which the R and the false twisting device TW are driven by an inverter. In short, it is only necessary to connect two or more inverters of the yarn traveling system by a serial communication line. The use of the oiling device OIL is also optional.

[0046]

According to the first aspect of the present invention, since a plurality of controllers are connected to the system bus of the centralized control device via a serial communication line, the connections of the plurality of controllers to the system bus become one. There is room for connection with other controllers, and the entire control of the draw false twister can be performed by the centralized control device. In addition, since a plurality of related controllers having common settings and the like are connected for each serial communication line, the communication program can be simplified.

According to the second aspect of the present invention, the acceleration / deceleration time setting and the speed setting for the yarn traveling system inverter and the temperature setting for the heater controller can be performed through separate serial communication lines by a simple communication program. it can.

According to the third aspect of the present invention, since the yarn traveling system inverter is connected via a serial communication line, communication takes time when the yarn speed is changed. By simultaneously issuing a speed change command on the change signal line, it is possible to prevent a thread break or the like due to a shift in acceleration / deceleration timing.

According to the fourth aspect of the present invention, the traverse speed is changed by the synchronization signal from the edge controller. The load can be reduced, and the circuit configuration of the edge controller is simplified as compared with the case where the edge controller outputs the periodic fluctuation of the traverse inverter.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a connection state of each device in a control system for a draw false twisting machine according to an embodiment.

FIG. 2 is a flowchart showing a procedure for changing a yarn speed by a plurality of driving inverters.

FIG. 3 is a diagram showing a connection state between a traverse inverter and a traverse width changing edge controller.

FIG. 4 is a diagram showing a mode of changing a traverse width by an edge controller.

FIG. 5 is a diagram showing a display example of a driving system operation state.

FIG. 6 is a diagram showing a display example of a heater operation state.

FIG. 7 is a diagram showing a display example of an alarm.

FIG. 8 is a diagram showing a device arrangement of a drawing false twisting machine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 central control device 2 central processing unit 3 system bus 4 first serial communication device 5 second serial communication device 21 first serial communication line 23 yarn traveling system inverter group 29 traverse inverter 31 second serial communication line 32 heater controller group 33 Third serial communication device 34 Edge controller 37 Fourth serial communication device 38 R-side weight doffing device 39 L-side weight doffing device f1 Speed change signal line f2 Synchronization signal line

Claims (4)

[Claims] A centralized control device having a system bus;
A control system for a draw false twisting machine, comprising: a plurality of serial communication lines connected to the system bus; and a plurality of related controllers serially connected via the serial communication lines. 2. A system bus, wherein a plurality of yarn traveling system inverters are connected in series via a first serial communication line, and a plurality of heater controllers are connected in series via a second serial communication line. 2. The control system for a draw false twisting machine according to 1. 3. A speed change signal line for unifying acceleration / deceleration time of each of the plurality of yarn traveling system inverters and transmitting a speed change signal to the inverters simultaneously and simultaneously. A control device for the spinning winder according to the above. 4. A traverse inverter connected to the first serial communication line, and a traverse width changing edge controller connected to the system bus, wherein the traverse inverter periodically changes a traverse speed. 4. The control device according to claim 2, further comprising a disturb function for causing the traverse inverter to change a traverse speed by a synchronization signal line from the traverse width changing edge controller.