JP2000328408A - Control of driving unit in warp knitting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for controlling the actuator that can meet the change in the unit yarn count in one knitting repeat and can avoid large reduction in productivity even in the case of large shogging of the guide bar in a warp knitting machine in which the knitting works are performed as the motor B driving the guide bar, the motor C driving the delivery roller, and the motor D winding up the knitted fabric are synchronized to the main shaft driven by the motor A. SOLUTION: The data on the rotation of the delivery roller accompanied by the alteration in the winding-up value is prepared as the driving data that are adjusted in correspond to the winding-up amount and the motor driving the delivery roller is controlled according to the data. Further, the data for driving the main shaft is adjusted corresponding to the variation of the shogging values and the rotation of the main shaft is adjusted thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a driving section in a warp knitting machine.

[0002]

2. Description of the Related Art The structure of a warp knitting machine is roughly divided into five driving parts, namely, a yarn feeding part, a knitting part, a patterning part, a driving part, and a winding part. In some parts, mechatronics applications are made.

[0003] The insertion of a ground beam, on which a warp for knitting is wound in a yarn feeding section, is positively rotated by a servomotor to supply a warp. Further, the warp is guided to a knitting needle. The displacement movement of the guide bar that guides the yarn is performed using a servomotor, and the rotation of the roller that winds the knitted fabric is drive-controlled by the servomotor,
It is a known technique that the driving value is changed by this, and various proposals have been made so far.

For example, in a control method and apparatus disclosed in Japanese Patent No. 2665446, a pattern data, that is, a displacement value corresponding to a knitting structure of the guide bar, and a knitting driving value, that is, the number of rotations of the winding roller are input. The rotation of the servomotor of the ground beam is determined and determined from the combination table of the warp yarn supply amount (value) corresponding to the displacement value (shogging length) and the knitted fabric driving value, and knitting is performed using the arithmetic device. Things.

According to the above method, the displacement movement of the guide bar by the servomotor, the yarn feeding movement of the ground beam axis by the servomotor drive, and the winding movement of the winding roller shaft by the servomotor drive are caused by the movement of the needle bar having the knitting needle. Is performed in synchronization with the rotation of the main shaft provided with a cam that causes

[0006]

However, the above method can cope with a constant knitted fabric driving value, but can cope with a case where the knitted fabric driving value is changed in a knitting course of one repeat. I can't. In addition, it is necessary to adjust the number of rotations of the main shaft according to the magnitude of the displacement value of the guide bar. Naturally, in the case of knitting including a knitted structure having a large amount of displacement, the number of rotations needs to be reduced.

The present invention solves the above-mentioned drawbacks and enables knitting even if the knitted fabric driving value is changed within a knitting course of one repeat, and does not greatly reduce productivity even when the displacement of the guide bar is large. It is intended to provide a control method of the driving unit.

[0008]

According to the present invention, a motor B for driving a guide bar, a motor C for driving a feed roller and a motor D for driving a take-up roller are synchronized with each other with respect to a main shaft driven by a motor A. In the warp knitting machine which drives each part based on a signal from the control means, the motor D is driven in response to an increase or decrease in the number of rotations of the winding roller in accordance with a change in the driving value in one knitting repeat. By controlling the rotation and controlling the number of rotations of the motor C to adjust the yarn feeding amount, even if the driving value is changed in a knitting course of one repeat, Since the rotation of the delivery roller is set correspondingly, a smooth knitting can be performed according to the yarn feeding conditions corresponding to the respective driving values.

Further, according to the present invention, a motor B for driving a guide bar, a motor C for driving a feed roller and a motor D for driving a take-up roller are controlled with respect to a main shaft driven by a motor A while synchronizing each other. In the warp knitting machine which drives each part based on a signal from the means, the number of rotations of the motor A is controlled in response to a change in the amount of rotation of the motor B accompanying a change in the shogging value in one knitting course. By adjusting the rotation of the main shaft of the knitting machine to a rotation that matches the optimum knitting conditions, only the part where the shogging value is large is reduced to the appropriate rotational speed, and the rotational speed is reduced in the part where the shogging value is relatively small. However, since the rotation is maintained at a high speed, the production efficiency does not significantly decrease.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The control method of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a warp knitting machine to which the control method of the present invention is applied, together with control means including a control computer. As a warp knitting machine, a guide bar 1 (usually a plurality of sheets are provided), a feed roller 2 (provided in parallel with a beam shaft (not shown)), and
A take-up roller 3 (usually composed of three to four rolls) is provided. Reference numeral 4 denotes a main shaft, which is configured as a driving unit including a cam member (not shown) for driving a knitting element such as a needle bar (not shown).

A drive motor is provided on each of the guide bar 1, the feed roller 2, the take-up roller 3, and the main shaft 4. A is a main shaft drive motor, which is an inverter motor having an inverter 5. B is the guide bar 1
Is a servo motor having an encoder (PG), C is a motor for driving the feed roller 2 and is a servo motor having an encoder (PG), and D is a motor for driving the take-up roller 3 and is an encoder. (P
G) are each configured as a servomotor.

Reference numerals 6, 7, and 8 denote servo drivers, which are respectively associated with motors B, C, and D, and are connected to a control box 9 attached to the warp knitting machine.

The control box 9 as a control means includes a CPU 1
0, a memory 11, a communication controller 12, a servo controller 13, an output board 14, and an input board 15. A program 13 is stored in the CPU 10, and the servo controller 13 has a D / A conversion function and a counter function.

Reference numeral 16 denotes a personal computer, which uses a notebook personal computer in the embodiment, transfers data to the communication controller 12 and thereby transfers the data to the memory 1.
1 is written with data.

The data input to the personal computer 16 is performed based on the flowchart shown in FIG. When a new file is created, data is created based on “create new file” (described later). When there is a file immediately, “spindle drive motor data creation” and “reed ( Guide bar)
"Drive data creation", "sending data creation", "winding data creation" ... (each described later) are selected and necessary data is input.

Next, each data creation will be described with reference to a flowchart. FIG. 3 shows the case of creating a new file. The file name, the number of repeat courses (the total number of knitting courses to be repeated), the number of gauges (the number of knitting needles installed per inch), and the motor allocation (the guide used) Designation of which servo motor B corresponds to the bar).

FIG. 4 shows the data creation of the reed drive motor. First, in the knitting structure data input, for example, 2-0 / 2-4 / 2 in the previously specified one-repeat course.
Write two figures for each knitting course, such as -2 / 2-0 ..., check the data, correct the data if incorrect, and if correct, knitting machine gauge (for example, 1 inch In the case of 18 needles per needle, the stitch pitch is 0 →
2 and the displacement amount is 25.4．18 ≒ 1.41
1 mm), the rotation amount of the motor B is determined, and the data for each knitting course is stored in the personal computer 16.
The reed driving data is calculated by the calculating means in the above and transferred to the memory 11 and written.

FIG. 5 shows the creation of drive data for the motor D for driving the take-up roller 3. First, the numerical value of the driving data is input in units of course / inch. Normally, the driving value is constant, but as shown in FIG. 6, the number of knitting courses in one repeat knitting course CS is CSI to CS.
When it changes stepwise to V, the rotation data of the motor D is calculated for each knitting course in accordance with each driving value, transferred to the memory 11, and written.

FIG. 7 shows the creation of drive data of the motor C for driving the feed roller 2. First, when the feed amount does not need to be automatically calculated, that is, when the winding value is constant and the reed is fixed. Drive is a predetermined knitting structure,
If the delivery ratio has already been determined, the calculation of the overlap amount and the underlap amount and the calculation of the delivery ratio are not performed. If the delivery ratio is not determined here,
The overlap amount and the underlap amount are calculated, and the delivery ratio is calculated.

The above calculation is described in pages 231 to 2 of “Kenkaku Zenshu, October 1, 1982” published by the present applicant.
The practical runner calculation method described on page 34 is used, and detailed description is omitted here. However, the knitting structure data shown in FIG. 4, the driving data shown in FIG. 5, and the thickness of the yarn shown in FIG. The theoretical yarn sending ratio is calculated based on the data. At this time, in the case of the multi-step winding shown in FIG. 6, the delivery data corresponding to the delivery value is calculated for each delivery value, transferred to the memory 11 as the data of the delivery motor C, and written.

FIG. 8 shows the creation of drive data of the motor A for driving the main shaft 4. For example, as shown in FIG. 9, in one repeat knitting course CS, for example, CS3, CS5, CS7, In each knitting course of CS8, in the process of calculating the amount of overlap and the amount of underlap, the rotation of the spindle drive motor is controlled by, for example, 50%.
rpm, 100 rpm, 150 rpm, 200 rpm,
The rotation speed is set in accordance with each shogging value (underlap amount) by setting the rotation speed at 250 rpm, 300 rpm, or the like, and is written in the memory 11 as data of the main shaft drive motor A. Needless to say, the displacement amount of the overlap is calculated for one or two stitches.

Based on the current rotation speed of the knitting machine calculated for each knitting course for the motors A, C, and D as shown in FIG. A command signal is output, and based on the command signal, the motor A is driven, and the winding drive command and the sending drive command are similarly output for the motors C and D to perform knitting.

As described above, the motors A, B, C and D are driven based on the respective drive data. Next, the flow of this signal will be described specifically. For the sake of convenience, the guide bar, the feed roller, and the take-up roller are each one unit as shown in FIG. First, when the power is turned on to the warp knitting machine and the drive switch is turned on, the spindle drive motor A rotates and the spindle 4
The synchronization pulse S1 of the first knitting course is taken into the CPU 10 via the input board 15 from the encoder (PG) set in the first step, and the drive command signal S2 of the first knitting course is first guided by the servo controller 13 based on this signal. Servo driver 6 is sent to bar 1 as speed command signal S3.
To the motor B via At the same time, a signal S4 is transmitted to the feeding roller 2, and a signal S5 is transmitted to the winding roller. Further, the multi-stage speed command signal S
6 is transmitted to the motor A via the inverter 5. When the main shaft makes one rotation, the synchronization pulse S1 of the second course is transmitted from the CPU 10 to the inverters 5 of the drive motors A, B, C, D and the servo drivers 6, 7, 8 in the same manner.
The signals S7, S8, S9 are signals indicating the current position fed back from each encoder (PG) to the servo controller 13 via the servo drivers 6, 7, 8 and the commanded position is confirmed based on this. The knitting is performed by sequentially repeating these processes.

As described above, the motor C for driving the feed roller is driven by the main shaft 4 based on the synchronization pulse S1.
The motor D for driving the take-up roller while synchronizing with
Is accelerated / decelerated in response to a change in the number of revolutions accompanying a change in the driving value.

The rotation speed of the motor A for driving the spindle is increased or decreased according to the magnitude of the shogging value of the motor B for driving the guide bar.

Of course, if the change of the driving value is within one knitting repeat and the shogging value is changed within one knitting repeat, the motor C for driving the delivery roller
Needless to say, the rotation speed of each of the spindle drive motors B is adjusted while synchronizing with the spindle 4 based on the synchronization pulse S1.

[0028]

As described above, according to the first aspect of the present invention, even when the driving value is changed in multiple stages within one knitting repeat, the feeding amount data corresponding to the changed value can be supplied to the feeding roller drive motor. As a result, an appropriate yarn supply amount can be obtained, so that a smooth knitting can be obtained.

According to the second aspect of the present invention, the rotation speed of the spindle drive motor can be adjusted to the optimum knitting condition according to the amount of shogging in one knitting course of the guide bar. But production does not drop significantly.

By combining the above two inventions, a smooth knitting can be performed without reducing productivity even in a knitting having a driving value that is changed step by step.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a warp knitting machine to which a control method of the present invention is applied, together with control means.

FIG. 2 is a flowchart showing data input to a personal computer.

FIG. 3 is a flowchart illustrating creation of a new file.

FIG. 4 is a flowchart showing data creation of a reed driving motor.

FIG. 5 is a flowchart illustrating data creation of a take-up roller drive motor.

FIG. 6 is an explanatory diagram showing a change in driving value in one repeat knitting course.

FIG. 7 is a flowchart illustrating data creation of a delivery roller drive motor.

FIG. 8 is a flowchart showing data creation of a spindle drive motor.

FIG. 9 is an explanatory diagram showing the amount of shogging of a guide bar.

FIG. 10 is a flowchart showing a count-up process for each knitting course.

[Explanation of symbols]

 1. Guide bar (reed) 2. Feeding roller 3. Winding roller 4. Main shaft 5. Inverter 6, 7, 8 ... Servo driver 9. Control box 10. ..CPU 11 ... Memory 12 ... Communication controller 13 ... Servo controller 14 ... Output board 15 ... Input board 16 ... Personal computer A ... Spindle drive motor B ... Guide Bar drive motor C: Delivery roller drive motor D: Take-up roller drive motor

[Procedure amendment]

[Submission date] June 16, 1999 (1999.6.1
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

The control box 9 as a control means includes a CPU 1
0, a memory 11, a communication controller 12, a servo controller 13, an output board 14, and an input board 15. The CPU10 are stored programs, the servo controller 13 has a D / A conversion function and the counter function.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

FIG. 8 shows the creation of drive data of the motor A for driving the spindle 4. For example, as shown in FIG. 9, in one repeat knitting course CS, for example, CS 6 , CS 10 , In each of the knitting courses of CS 12 and CS 14 , the rotation of the spindle drive motor in the process of calculating the overlap amount and the underlap amount is, for example, 50 rpm, 100 rpm, 150 rpm, and 200 rpm.
The number of rotations is set in accordance with each shogging value (underlap amount), and the rotation number is set in the memory 11 as data of the spindle drive motor A, such as pm, 250 rpm, and 300 rpm. Needless to say, the displacement amount of the overlap is calculated for one or two stitches.

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Claims (2)

[Claims] 1. With respect to a spindle driven by a motor A,
In a warp knitting machine, each part is driven based on a signal from a control means while synchronizing a motor B for driving a guide bar, a motor C for driving a feed roller, and a motor D for driving a take-up roller with each other. In addition to controlling the rotation of the motor D in response to an increase or decrease in the number of rotations of the take-up roller due to a change in the driving value in one knitting repeat, the number of rotations of the motor C is controlled to adjust the yarn supply amount. A method for controlling a drive unit in a warp knitting machine, characterized in that: 2. With respect to a spindle driven by a motor A,
In a warp knitting machine, each part is driven based on a signal from a control means while synchronizing a motor B for driving a guide bar, a motor C for driving a feed roller, and a motor D for driving a take-up roller with each other. 1. In response to a change in the amount of rotation of the motor B accompanying a change in the shogging value in one knitting course, the number of rotations of the motor A is controlled to adjust the rotation of the main shaft of the knitting machine to a rotation that meets the optimum knitting conditions. A method for controlling a drive unit in a warp knitting machine, comprising: