JPH0659976B2 - Spindle drive automatic switching Winding machine bobbin starting method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for starting a retaining bobbin in a spindle drive automatic switching winder for winding a yarn.

[Conventional technology]

A plurality of bobbin holders for mounting bobbins are projected on the turret, and the winding speed of the yarn is alternately switched from the bobbin of one bobbin holder to the bobbin of the other bobbin holder, and the peripheral speed or the yarn of the package wound on the bobbin is changed. In a spindle drive automatic switching winder that controls the tension of the yarn to a predetermined value, when the yarn is switched, the bobbin on the reserve side is sufficiently accelerated to a predetermined speed near the steady winding speed. If not, the yarn is loosened due to the difference in the winding speed between the bobbins, the yarn is wound around the rotating portion, and the switching success rate is reduced.

Therefore, when switching yarns, conventionally, the bobbin holder on the reserve side is started, and a rotation speed detector including a tachogenerator or a combination of a gear and an electromagnetic pickup is attached to the bobbin holder, and the rotation speed detector is used. After detecting that the rotation speed has been increased to a predetermined value, the turret is rotated to switch to the control by the contact roller or the control by the tension.

[Problems to be solved by the invention]

Such a conventional method has the following problems.

1) In order to detect that the bobbin on the reserve side has accelerated to a predetermined rotation speed, a rotation speed detector at the time of starting the bobbin holder is necessary in addition to the detector for winding control, and automatic switching winding The equipment cost of the machine becomes expensive.

2) In recent years, the spinning process has been centralized, the control device such as a microcomputer dislikes the oil atmosphere, and the control device has a sufficiently large capacity. One control device is installed in the control room and a plurality of reels are wound. I try to control the machine. In this case, the winding room in which the automatic switching winding machine is installed and the control room may be installed, for example, in a place separated by 100 m or more, and as described above, in addition to the detector for winding control. If the rotation speed detector for starting the bobbin on the backup side is provided, the wiring between the winding room and the control room becomes complicated and the cost becomes high.In addition, wiring over a long distance causes noise in the control system. It was easy to cause entry control failure.

[Object of the Invention]

The present invention, when starting the reserve bobbin, starts the reserve bobbin holder in a spindle drive automatic switching winder capable of switching winding of the yarn after confirming that the speed has increased to a predetermined value. The purpose is to provide a method.

Further, the present invention eliminates the need for a rotational speed detector of the reserve bobbin for confirming the speed of the reserve bobbin holder, and can reduce equipment costs, and activates the reserve bobbin holder in a spindle drive automatic switching winder. The purpose is to provide a method.

Further, according to the present invention, it is possible to minimize the deviation of the actual rotation speed of the reserve bobbin holder from the target value due to the slippage of the induction motor for driving the reserve bobbin holder. An object of the present invention is to provide a method for starting a side bobbin holder.

[Means for solving problems]

According to the present invention, a plurality of bobbin holders for mounting bobbins are provided on the turret so as to project from the bobbin of one bobbin holder to the bobbin of the other bobbin holder, and the bobbin is wound on the bobbin. In a spindle drive automatic switching winder configured to control the peripheral speed of a package or the tension of a yarn, the bobbin holder can be driven by an induction motor via an inverter, and a command input to the inverter is The start command of the side bobbin holder and the control command by the contact roller or the tension detector after the thread switching can be switched, and at the time of starting the reserve bobbin holder, the take-up speed previously input to the storage circuit, From the slip ratio of the induction motor and the winding speed set in the winding speed setting device, the index of the bobbin holder on the reserve side can be obtained. A start command to calculate the value, the temperature Te comparison control the output frequency of the target value and the inverter Hayashi, after the frequency of the inverter has reached a predetermined value, switching the yarn,
There is provided a method of starting a backup bobbin of a spindle drive automatic switching winder, which is configured to switch to a control command by a contact roller or a tension detector.

[Action]

In the present invention, instead of omitting the rotation speed detector of the reserve bobbin holder and detecting the actual rotation speed of the bobbin holder, the start is performed using the output frequency of the inverter input to the induction motor connected to the reserve bobbin holder. As a command, the speed is controlled until the backup bobbin holder is accelerated to a predetermined speed at the time of startup. Therefore, according to the present invention, the rotation speed detector of the reserve bobbin holder is unnecessary,
The cost of the device can be reduced.

Since the inverter input to the induction motor is controlled by using the output frequency, the speed deviation of the bobbin holder may occur due to the slip of the induction motor for driving the bobbin holder on the reserve side. The target value of the bobbin holder on the reserve side is calculated from the induction motor slip ratio with respect to the winding speed input to the circuit and the winding speed set in the winding speed setting device, and the target value is compared with the output frequency of the inverter. The speed deviation is minimized by controlling.

Since this measure of the present invention can be dealt with only by software of the microcomputer, the cost of the device can be reduced, and
There is no need for wiring for detecting the speed of the bobbin holder on the reserve side, and since processing can be performed within the control panel, there is almost no effect of noise even if the distance between the winding room and the control room is large, and wiring is also possible. The laying cost can be reduced and the cost can be reduced.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention in which a turret table 4 is rotatably supported by a machine base (not shown), and bobbin holders 1 and 3 are rotatably projected on the turret table 4. ing. The bobbins 1 ′ and 3 ′ are mounted on the bobbin holders 1 and 3, and the yarn is wound on the bobbins 1 ′ and 3 ′ to form the package 2.

Induction motors 6 and 5 are connected to the bobbin holders 1 and 3, respectively.

The contact roller 7 is rotated in contact with the bobbin 1 ′ mounted on the bobbin holder 1 located at the winding position or the package 2 formed on the bobbin 1 ′. The gear 8 is attached to one end of the contact roller 7, and the gear 8
A tooth of the gear 8 is detected by a detector 9 (an electromagnetic pickup in this embodiment) installed opposite to the contact roller 7
Detects the number of rotations of.

Inverters 10 and 11 are connected to the motors 6 and 5, respectively. The inverters 10 and 11 are connected to the changeover switches 13 and 12 via sample and hold 23 and 24, respectively, and the changeover switches 13 and 12 switch between an initial speed-up command (start command) and a winding control command. .

The winding speed setting device 14 sets the winding speed V of the bobbin holder 3. The comparison circuit 15 compares the value set in the winding speed setting device 14 with the feedback signal of the detector 9 to calculate the deviation. P. I. Based on the deviation calculated by the comparison circuit 15, the calculation circuit 16 calculates the P.P. I. Perform arithmetic processing.

As is well known, the induction motors 5 and 6 rotate at a speed N slightly lower than the synchronous speed N ₀ that is uniquely determined by the input frequency, and N = (N0-N) / N ₀ is called the slip ratio of the induction motor. There is. The slip ratio is not constant and changes depending on the rotation speed of the induction motor and thus the winding speed of the yarn.

The storage circuit 17 stores in advance the relationship S = f (V) between the winding speed V and the slip ratio S of the induction motor.

The speed increasing ratio setting device 18 sets the peripheral speed of the bobbins 1 ', 3'during initial speed up to be slightly higher (α times) than the speed during winding in order to improve the thread hooking property at the time of switching. .

From the value V set in the winding speed setting device 14, the value S in the storage circuit 17, and the value α in the speed increasing ratio setting device 18, the target value computing circuit 19 sets the target value R of the initial speed to R = αV (1 + S)
Calculate as

The comparison circuit 20 compares the target value R set by the target value calculation circuit 19 with the output frequency of the inverter 11 during the initial speed-up to calculate the deviation.

P. I. The arithmetic circuit 21 calculates the P.P.M. based on the deviation calculated by the comparison circuit 20. I. Perform arithmetic processing.

The changeover switch 22 is provided in the comparison circuit 20 and the inverter 1
The output frequencies 0 and 11 are switched and input.

[Work]

The case of switching the winding of the yarn from the bobbin 1'to the bobbin 3'will be described.

The bobbin holder 1 equipped with the bobbin 1'is the inverter 1
It is driven by an induction motor 6 connected to 0. A gear 8 is attached to an end portion of a contact roller 7 which is pressed against the package 2 wound on the bobbin 1'and is driven to rotate, and the gear 8 is detected by a detector 9 to generate a feedback signal. The feedback signal is compared with the winding speed V set by the winding speed setting unit 14 in the comparison circuit 15 to calculate the deviation. Based on the deviation calculated by the comparison circuit 15, the P.P. I. In the arithmetic circuit 16, the P.P. I. Calculation processing is performed, and the inverter 1 passes through the contact a of the changeover switch 13.
Control 0. That is, the output frequency of the inverter 10 is controlled so that the rotation speed of the contact roller 7 becomes a predetermined value.

When the package 2 reaches a predetermined winding amount, the reserve bobbin holder 3 is activated by the induction motor 5 connected to the inverter 11 in response to a full winding command from a timer (not shown) or the like.

At this time, the command (start command) to the inverter 11 is calculated as follows. The slip ratio S of the induction motors 5 and 6 for each winding speed V is stored in the storage circuit 17 in advance. The winding speed V set in the winding speed setting device 14
The slip ratio S of the motor is calculated from the storage circuit 17 based on the above, and the slip ratio S, the winding speed V, and the speed increasing ratio setting device 1 are calculated.
From the speed increasing ratio α set to 8, the target value R is calculated by the target value calculation circuit 19 as R = αV (1 + S). The frequency of the inverter 11 is increased to the frequency corresponding to the calculated target value, the output frequency of the inverter 11 is input to the comparison circuit 20 from the contact a of the changeover switch 22, and the target value and the output frequency of the inverter 11 are compared. Based on the deviation calculated by the comparison circuit, the P.P. I. In the arithmetic circuit 21, P.I. I. The frequency of the inverter 11 is controlled to a predetermined value by performing arithmetic processing.

When the frequency of the inverter 11 reaches a value corresponding to a predetermined switching speed, the turret table 4 is rotated after the stabilization time of several seconds elapses to wind the yarn from the bobbin 1'of the bobbin holder 1 to the bobbin holder 3 '. Switch to bobbin 3 '.

Simultaneously with the start of the rotation of the turret table 4, the rotation of the bobbin holder 1 having the package 2 mounted thereon is slightly accelerated, separated from the control by the contact roller 7, and the speed of the turret table 4 is sampled and held. It is maintained until the movement is completed.

On the other hand, the bobbin holder 3 attached to the empty bobbin 3'is rotated at a predetermined rotation speed by feedback control even during the rotation of the turret table 4, and is brought into contact with the contact roller 7 before the yarn is switched, Just before switching, at the same time as switching, or immediately after switching, switch 1
2, 13, and 22 are switched to the contact b and switched to the control (control command) by the contact roller 7.

It should be noted that while the set values of the inverters 10 and 11 are held by the sample and hold 23 and 24, the changeover switches 12 and 13 are changed over to the contact point b, just before the yarn is switched, simultaneously with the switching, or immediately after the switching. In addition, the control may be switched at the same time when the sample and hold 23 and 24 are released.

The yarn is wound on the bobbin 3'mounted on the bobbin holder 3 to form a package. When the package reaches a predetermined winding amount, the winding of the yarn is switched from the bobbin 3'to the bobbin 1'mounted on the bobbin holder 1 on the reserve side in the same manner as the above-mentioned procedure.

In the above embodiment, digital control is performed using a microcomputer.

In this embodiment, P. I. The bobbin holder was accelerated by feedback control, but when it was accelerated, it was accelerated by an open-loop with a predetermined gradient to the vicinity of the target value, and when the frequency of the inverter reached the target value, the rotation of the bobbin holder was slightly stabilized. After a certain period of time, the comparison, P. I. The target value may be brought close to the target value by a small amount by calculation processing.

Further, in this embodiment, even during the rotation of the turret table 4,
Although the frequency of the inverter 11 is feedback-controlled to control the rotation speed of the bobbin holder 3 on the reserve side, it may be held at a predetermined speed by the sample hold 24 at the same time when the rotation of the turret table 4 is started.

Further, in this embodiment, the changeover switch 2 is provided immediately after the yarn changeover.
Although 2 is switched, it may be switched during the next activation of the reserve bobbin holder.

In this embodiment, the peripheral speed control winder has been described, but the present invention can be applied to a tension control winder.

Data of several points may be input as the data of the memory circuit 17, and calculation may be performed between the points.

〔The invention's effect〕

According to the present invention, since the target value and the output frequency of the inverter are compared and controlled at the time of starting the reserve bobbin, the rotation speed detector of the reserve bobbin holder becomes unnecessary.

In addition, since control is performed using the output frequency of the inverter input to the induction motor, there is a possibility that a speed deviation of the bobbin holder may occur due to slip of the induction motor for driving the bobbin holder on the reserve side, but in the present invention, The target value of the bobbin holder on the reserve side is calculated from the slip ratio of the induction motor and the winding speed set in the winding speed setting device with respect to the winding speed input in advance in the storage circuit, and the target value and the output of the inverter are calculated. By comparing and controlling the frequencies, the speed deviation is minimized and the bobbin switching success rate is increased.

Since this measure of the present invention can be dealt with only by the software of the microcomputer, the cost of the device can be reduced. Further, since it is possible to perform processing in the control panel without the need for wiring, the influence of noise is almost eliminated even if the winding chamber and the control chamber are separated from each other. Further, the cost of wiring laying can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 shows a flow diagram of an embodiment according to the present invention. 1, 3 ... bobbin holder, 1 ', 3' ... bobbin, 2 ... package, 4 ... turret table, 5, 6 ... induction motor, 7 ... contact roller, 8 ... gear, 9 ... detection Inverter, 12, 13, 22 ... Changeover switch, 14 ... Winding speed setter, 15, 20 ... Comparison circuit, 16, 21 ... P. I. Arithmetic circuit, 17 ... Memory circuit, 18 ... Speed increase ratio setting device, 19 ... Target value arithmetic circuit, 23, 24 ... Sample and hold.

Claims (1)

[Claims] 1. A plurality of bobbin holders for mounting bobbins are provided on a turret so as to project from the bobbin of one bobbin holder to the bobbin of the other bobbin holder, and the bobbin is wound on the bobbin. In a spindle drive automatic switching winder configured to control the peripheral speed of a package or the tension of a yarn, the bobbin holder can be driven by an induction motor via an inverter, and a command input to the inverter is a reserve side. Bobbin holder start command,
The control command from the contact roller or tension detector can be switched after the thread is switched, and when the bobbin holder on the reserve side is started, the slip ratio of the induction motor and the winding speed with respect to the winding speed input in the memory circuit in advance. The target value of the bobbin holder on the reserve side is calculated from the winding speed set in the speed setting device and used as a start command, the target value and the output frequency of the inverter are compared and controlled, and the frequency of the inverter reaches a predetermined value. After that, the yarn is changed over to a control command by a contact roller or a tension detector, and a starting bobbin of the spindle drive automatic change-up winding machine is characterized.