JPH05302222A - Spindle driving control unit in spinning frame - Google Patents

Abstract

PURPOSE:To provide the control unit enabling the speed change pattern of spindle revolution in a spinning frame to be changed easily. CONSTITUTION:(A) The initial revolving speed of a spindle 1 at the beginning of winding and (B) the speed gradients for the revolving speeds of the spindle corresponding to respective blocks resulting from dividing the production volume from the beginning of wrapping to the full-packaged state are stored in an operational memory 15. A control unit 11 then calculates the speed corresponding to the production volume through a central processor 13 based on the above speed data and outputs the speed instruction corresponding to this speed to an inverter 12. On receiving the instruction, the inverter 12 then makes a speed change for a driving motor 5, thus controlling the revolving speed of the spindle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle drive controller for a spinning machine such as a ring spinning machine and a ring twisting machine.

[0002]

2. Description of the Related Art A conventional spindle drive control device for a spinning machine is disclosed in JP-A-3-124819. With this control device, the set values of the production amount and the spindle rotation speed are input at a plurality of shift start points and shift end points that are entrusted from the start of the spindle to the stop of the machine, and based on these set values. Then, a speed gradient between adjacent shift points is calculated, and a signal is output to the drive control unit so as to obtain the speed gradient of the spindle rotation speed, so that the spindle drive motor variable speed control is performed. Further, when the spindle rotation speed, the production amount, etc. are changed, the set value of the shift point requiring the shift is re-input by the input device of the control device.

[0003]

When the operating speed is changed depending on the operating conditions of the machine base, for example, when the traveler is replaced for maintenance work due to damage or wear of the traveler and the traveler is run-in, the yarn breakage is prevented. Therefore, the work of lowering the spindle speed is performed. According to the above shift method, before and after such a break-in operation of the traveler, when changing the shift pattern of the spindle rotation speed, by changing or resetting all the set values of the production amount and the spindle rotation speed at each shift point. The speed change pattern of the spindle rotation speed can be changed and set, but the change of this set value can be done even if the maximum speed is lowered or raised while keeping the speed gradient between adjacent shift points constant. This is exactly the same, and as a result of resetting the production amount of all the shift points and the spindle rotation speed, there is a risk that the setting work will be very troublesome. The present invention relates to a spindle for a spinning machine, in which it is easy to change and set the shift pattern of the spindle rotation speed when changing the spindle rotation speed, and moreover, it is easy to change the set value when changing the shift pattern without changing the speed gradient. It is to provide a drive control device.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to the production amount from the winding start of the yarn to the full yarn.
In a spindle drive device that variably controls a drive motor that rotates a spindle, the speed at which the output from the start of the spinning machine to the full pipe is divided into multiple sections, and the speed gradient of the spindle rotation speed is set corresponding to each section. Slope setting means,
An initial speed setting means for setting an initial speed of the spindle rotation speed at the winding start, a storage means for storing the speed gradient and the initial speed, and a speed gradient for storing the spindle rotation speed from the winding start to the full pipe in the storage means. And a speed command output means for outputting a speed command to the drive motor according to a result of the calculation.

[0005]

The initial speed of the winding start is set by the initial speed setting means, and the speed gradient of the spindle rotation speed corresponding to each section is set by the speed gradient setting means. , To the storage means. In this state, spinning is started, and the shift control of the drive motor is performed according to the production amount so that the initial speed in the storage device and the spindle rotation speed obtained from the speed gradient become the spindle rotation speed. When changing the speed pattern while keeping the speed gradient of each section constant, the spindle rotation speed from the start of winding to the full pipe is uniquely determined only by changing the initial speed, so the pattern can be changed very easily.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a large number of spindles 1 are arranged on a machine base at equal pitches so that a spun yarn 4 fed from a front roller 3 can be wound around a wood tube 2 inserted into the spindle 1. .. The figure shows the spun yarn 4 in a fully-wound state in which the spun yarn 4 is wrapped around the wood pipe 2. A pulley 6 is wedged to a drive motor 5 for driving the spindle, and a belt 8 wound between the pulley 6 and a chin pulley driving pulley 7 and a chin pulley 9 arranged corresponding to the spindle 1 are wound. The spindle 1 is rotationally driven via the belt 10 for driving the spindle. The drive motor 5 is driven and controlled by an inverter 12, and the inverter 12 is adapted so that a speed command output signal of the control device 11 is inputted via an input / output interface 18 and a digital / analog converter 19. There is.
Further, the drive motor 5 is also adapted to rotationally drive the draft portion including the front roller 3 via another transmission mechanism.

The control unit 11 includes a central processing unit 13 and a read-only memory (ROM) for storing control programs and the like.
And a control memory (storing means) 15 composed of a readable and rewritable memory (RAM) for storing the arithmetic processing result in the central processing unit 13 and speed data input from a keyboard 16 described later. ing. The control device 11 is divided into a plurality of sections from the winding start to the full pipe, and also serves as a speed gradient setting means for setting a speed gradient corresponding to each section and an initial speed setting means for setting an initial speed indicating the winding start. Keyboard 16 as input means
Is connected. Further, an output signal from a rotation detector 17 that detects the number of rotations of the front roller 3 is input to the control device 11 via an input / output interface 18. The central processing unit 13 operates according to the control program shown in FIG. 3, and is input by the keyboard 16 through the input / output interface 18, and the initial speed and the velocity gradient stored in the operation memory 15 and the rotation detector 17 are input. From the production output (spinning length), the spindle rotation speed corresponding to the production output at that time is calculated by the calculation formula described later, and the speed command signal corresponding to the calculated spindle rotation speed is output to the inverter 12. ing.

Next, the operation of the apparatus configured as described above will be described with reference to FIGS. Generally, the rise time until the drive motor 5 reaches the normal operating speed rises in a few seconds according to the pre-given speed-up gradient, and the time until the spindle rotation stops after the full pipe is short according to the pre-given deceleration gradient. Has almost no effect on the production amount, and it can be considered that the spindle rotation becomes the initial speed N ₀ described later immediately after starting. Therefore, in the present application, prior to the operation, the worker sets the initial speed N ₀ of the spindle rotation speed of about 70% to 80% of the maximum speed in the middle from the start to the maximum spindle rotation speed, and the spinning from the start to the full pipe is performed. The production length is defined as the production length, and the production volume is divided into 10 equal parts to obtain sections S _{0 to} S ₉
Split into. Then the velocity gradient V ₀ ~V ₉ entered from the keyboard 16 corresponding to each segment S ₀ to S ₉ so that the rotational speed of the spindle reaches a predetermined shift pattern according to pre-determined spinning conditions, each section S ₀ ~ Corresponding to S ₉ Figure 4
The operation memory 15 is stored as described above (step P1).
The velocity gradients V _{0 to} V ₉ referred to here are the divided sections S ₀ to
The difference between the initial speed and the final speed of S _{9 is shown} , and in this embodiment, the increase amount per minute is shown.

Next, the initial speed N ₀ of the spindle rotation speed indicating the winding start is set and input from the keyboard 16, and the operation memory 15 is entered.
(Step P2). Next, the machine base is started in this state, and the spindle rotation speed immediately reaches the initial speed N ₀ .
Then, in step P3, it is determined that the engine is started, and at the same time, the number of rotations of the front roller 3 from the rotation detector 17 is started to be integrated in the central processing unit 13 (step P4). Then, it is determined whether the accumulated value, that is, the current spinning length from the winding start has become the full pipe length (step P5), and which section is currently in (step P6). The spinning length is a unit length (for example, 2 m). Each time it increases, it goes through step P7 and then step P8.
Then, from the following equation, the spindle rotation speed N at the spinning length X
To calculate. However, Nn indicates the initial speed of each section, The spinning length X is expressed as a percentage. Then, a speed command is output to the inverter 12 so as to reach the determined spindle rotation speed N (step P9), and the inverter 12 shift-controls the drive motor 5 accordingly, and shifts the spindle 1 to the calculated spindle rotation speed. .. During acceleration / deceleration, the spindle rotation speed is gradually increased or decreased for each unit length of the spinning length, and changes substantially linearly. This control is repeated, and when the full pipe length is reached, it is determined in step P5 that the drive motor 5 is stopped. The speed command output means is constituted by steps P8 to P9 of this embodiment.

Initial velocity N ₀ and velocity gradient N ₀ to between sections S _{0 to} S ₉
Since obtaining the spindle rotating speed corresponding to the production based on the N _9, if you want to change the maximum speed without changing the velocity gradient may in configuration tasks change only initial velocity N _0, the change of the shift pattern It's extremely easy. Further, since the shift pattern can be automatically set only by setting the speed gradient and the initial speed of each section, the optimum operating condition can be easily set even when the spinning condition is changed.

It should be noted that the present invention is not limited to the above embodiment, for example, the gradient of spindle rotation speed and the initial speed are set and input, and then the spindle rotation speed is changed to the gradient and the initial speed corresponding to the production amount per unit length. Then, the calculated value is stored in the operation memory in correspondence with each unit length, spinning is then started, and each time the detected spinning length reaches the unit length, the corresponding spinning length is calculated. The stored calculated value may be read to change the spindle rotation speed.

[0012]

As described above, according to the present invention, since the initial speed and the speed gradient in the section can be set arbitrarily, the optimum operating condition corresponding to the spinning condition can be easily obtained. Moreover, the production volume up to full pipe is divided into multiple sections, and the spindle speed from the start of winding to full pipe is calculated from the initial speed and the speed gradient set corresponding to the section. ,
If you want to change the maximum rotation of the spindle without changing the speed gradient, you can change the speed pattern only by changing the initial speed, and even if the traveler is frequently replaced by high-speed operation, you can change the operating speed with a simple operation. This has the advantage that work time can be shortened.

[Brief description of drawings]

FIG. 1 is an illustration of an apparatus embodying the present invention.

FIG. 2 is a diagram showing an example of a shift pattern of a spindle rotation speed.

FIG. 3 is a flowchart of the present apparatus.

FIG. 4 is a chart showing a velocity gradient with respect to a section.

[Explanation of symbols] 1 spindle, 4 spun yarn, 6 drive motor,
11 control device, 12 inverter, 13 central processing unit, 14 program memory, 15 operation memory, 16 keyboard

Claims (1)

[Claims] 1. A spindle drive device for variably controlling a drive motor for rotating a spindle in accordance with a production amount from a winding start of a bobbin thread to a full pipe, and a production amount from a winding start of a spinning machine to a full pipe is divided into a plurality of sections. The speed gradient setting means for dividing and setting the speed gradient of the spindle rotation speed corresponding to each section, the initial speed setting means for setting the initial speed of the spindle rotation speed at the winding start, and the speed gradient and the initial speed are stored. A storage means and a speed command output means for calculating a spindle rotation speed from the beginning of winding to a full pipe based on the speed gradient and the initial speed stored in the storage means, and outputting a speed command to the drive motor based on the calculation result. And a spindle drive control device for a spinning machine.