JPH0157018B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a winder control system that enables high-precision fixed-length winding control during the manufacturing process, rewinding process, or coding process of sheet materials such as paper and film. It is related to the device.

In the winding machine control device, the winding machine side supports the winding sheet coil 1 with two rolls 2 in order to control the surface speed of the winding sheet coil 1, as shown in FIG. The winding speed is controlled by driving and rotating the two rolls.

Generally, in order to manufacture a larger number of winding coils 1 than one unwinding coil 3, the winding machine repeats increases and decreases in speed for each winding coil 1. At this time, the speed reference is set by the speed setter 4, the speed reference generator 5 generates a speed reference at a certain acceleration rate, and the generated speed reference is given to the speed controller 6 to drive the winder drive motor 7. Winding is performed. On the other hand, one winding coil 1 is wound to a set standard length l _M. Therefore, the standard length value set with the standard length setting device 8
Based on l _M and the winding value l _REL corresponding to the rotation of the winder drive motor 7 and the pulse of the pulse transmitter 9, a fixed length is set to accurately decelerate and stop at the fixed length value l _M. The control device 10 outputs a reference for deceleration and stop. Then, a comparator 11 compares this standard for deceleration and stopping with the speed standard generated by the speed standard generator 5 and determines which one should be prioritized.
A final speed reference is provided to the speed controller 6. In this way, the winding coil 1 is repeatedly wound and manufactured.

FIG. 2 is a block diagram showing the detailed configuration of the fixed length control device 10. As shown in FIG. In the figure, the standard length control device 10 is a winding amount calculator that converts the standard length value l _M set by the standard length setting device 8 and the pulse count value from the pulse transmitter 9 into a winding amount l _REL . The remaining length calculator 14 calculates the remaining length l ₁ based on the winding amount l _REL of the output 13. Next, the bias setting value _lSET is subtracted from the calculated remaining length _l1 , and the fixed length deceleration target value _l2 is calculated by the fixed length deceleration target calculator 15. Generally, the speed is determined as v=√2 for the distance l from the stopping point and the deceleration rate α.
Therefore, the route calculator 16 determines the standard deceleration speed based on the standard deceleration target value _l2 and the deceleration rate α.
_VR is calculated. A chart for the remaining length l of this standard deceleration speed reference v _R is shown in FIG. 3D, and a chart for time t is shown in FIG. 4E. Fourth
In chart E in the figure, since the deceleration rate α is constant, the vehicle is decelerated at a constant speed. At chart D in Figure 3, the speed curve becomes steep, and at the point where the speed reaches zero just before the bias setting value l _SET , the gain G=
Δv/Δl becomes infinite. For this reason, fixed length control becomes a point of concern. To prevent this, draw a straight line from the zero remaining length point in FIG. 3, find the tangent between it and the route curve, and after decelerating to that tangent point, the speed is increased by keeping the gain G constant at the tangent A. The chart on the time axis at this time is shown in F of FIG. As shown in Fig. 4, the linear deceleration chart I
You can see that the speed is changing to Chart F as it becomes more rounded. The slow motion speed is maintained at v _K , and the speed reference is set to zero when the remaining length is zero.

A specific example of switching to a tangential line will be described below with reference to FIG. In FIG. 2, the actual speed is calculated in the actual speed calculator 17 by the pulse of the pulse oscillator 9.
v Calculate _REL . Next, the current gain G is calculated by the gain calculator 18 based on this actual speed v _REL and the deceleration rate α. Then, the tangential switching speed v ₁ is calculated by the tangential switching speed calculator 19 using the remaining length l ₁ and the gain G. This tangent switching speed
v ₁ is low when the actual speed v _REL is high, and the actual speed v _REL
will gradually increase rather than decelerate. Also,
A tangent switching point is detected by a tangent switching point detector 20 that compares the upper tangent switching speed v ₁ and the actual speed v _REL . When a switching point is detected by this tangent switching point detector 20, the gain G at that time is fixed and the remaining length _l
A tangential velocity v _S is calculated by a tangential velocity calculator 21 for the tangential velocity v S . On the other hand, in response to a switching signal from the tangent switching point detector 20, the contact 22 is switched to the contact 23. By switching in this way, the speed is smoothly decelerated from the root carp to the chart A in FIG. 3, and from the direct deceleration to the rounded chart F in FIG. The gradual movement speed v _K is set by a gradual movement speed setting device 24 shown in FIG. 2, and is maintained at the slow movement speed v _K by two diodes 25. On the other hand, with respect to the remaining length l ₁ calculated by the remaining length calculator 14, the fixed length stop detector 26 detects that the remaining length l ₁ is zero, and the contact 27 is opened in response to the detection signal. By doing this, the fixed length stop is completed.

By the way, in reality, with respect to the above conventional technology, the speed response is slow due to the mechanical loss of the two rolls 2 of the winder winding sheet coil 1 and the winder drive motor 7, GD ² , etc. It does not ride the curve of chart F in the figure and undershoots to a slow speed v _K or less. Therefore, in order to prevent this undershoot, the bias setting value l _SET is increased. As a result, the rounding deceleration becomes gentler and the speed response becomes able to follow, but the time required to run at the gradual speed v _K becomes longer. (Chart G in Fig. 4 and Chart C in Fig. 3) As described above, the conventional control devices have the disadvantage that when the fixed length is completed, the time required to run at the undershoot or the slow movement speed v _K becomes longer. This causes sheet breakage, sagging, misalignment, etc.

The present invention was made to eliminate the above-mentioned conventional drawbacks.The purpose of the present invention is to smoothly stop the sheet at a fixed length, reduce tension fluctuations, eliminate sheet breakage, sagging, misalignment, etc., and accurately achieve a fixed length. An object of the present invention is to provide a winder control device that can control and wind up material.

In order to achieve the above object, the winder control device of the present invention includes a pulse transmitter that detects the rotational speed of a drive motor for driving the winder for the material rewound by the unwinder; A speed setting device that sets the winding speed of the take-up machine, a speed standard generator that inputs the set speed from the speed setting device and generates a speed standard, and a standard length setting that sets a standard length value (constant winding value). a fixed-length control device that outputs a fixed-length deceleration speed reference, a speed reference from a speed reference generator, and a fixed-length deceleration speed reference from the fixed-length control device, and which one is outputted preferentially. and a comparator that outputs the standard deceleration speed standard with priority when the speed standard is larger than the standard deceleration speed standard, based on the output pulse from the pulse generator and the speed standard from the comparator. and a speed control device that drives the drive motor, and controls the length control device based on the winding value corresponding to the output pulse from the pulse transmitter and the standard length value from the standard length setting device. Remaining length calculation means for calculating the length, fixed length deceleration target calculation means for calculating the fixed length deceleration target value by subtracting the bias setting value from the remaining length from the remaining length calculation means, and fixed length deceleration target calculation means for calculating the fixed length deceleration target value. Fixed-scale deceleration speed reference calculation means for calculating a fixed-scale deceleration speed standard based on the deceleration target value and attenuation rate, and calculates the current gain based on the actual speed and attenuation rate corresponding to the output pulse from the pulse transmitter. dummy remaining length calculation means that calculates a dummy remaining length by adding a dummy bias setting value to the remaining length from the remaining length calculation means; tangential switching speed calculation means for calculating the tangential switching speed based on the length; tangential switching point detection means for detecting the tangential switching point by comparing the tangential switching speed from the tangential switching speed calculation means with the actual speed; and tangential switching inspection. A tangential speed calculating means calculates the tangential speed based on the gain at the time of detecting the tangent switching point by the output means and the dummy remaining length from the dummy remaining length calculating means. The switching means is configured to switch to output the standard deceleration speed standard from the deceleration speed standard calculation means and, after detection, the tangential speed from the tangential speed calculation means as the standard deceleration speed standard. .

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. First, in order to achieve the above object, it is sufficient to output the speed standard so that the rounding of the curve of the conventional chart F is placed on the chart H in FIG. 4. To this end, the deceleration route curve in FIG. 3 is the same, and the tangential switching point is set at a higher speed point than the conventional one. For this purpose, a dummy bias value S _SET is provided on the negative side at the point of zero remaining length, and the tangential switching speed v ₁ is calculated from this point. FIG. 5 shows an example of its configuration. In the figure, the same parts as in FIG. 2 are given the same reference numerals, and the explanation thereof will be omitted, and only the different parts will be described here. That is, in FIG. 5, the dummy bias value S _SET is set by the dummy bias setting value 28 and the dummy bias value S _SET is added by the dummy bias adder 29 for the remaining length l ₁ determined by the remaining length calculator 14. The dummy bias adder 29 calculates a dummy remaining length _lX , and the tangential switching speed calculator 19 calculates a new tangential switching speed _v1 between the dummy remaining length _lX .

With such a configuration, the new tangential switching speed v ₁ is calculated to be higher than the conventional tangential switching speed v ₁ . As a result, the tangential switching point detector 20 detects the tangential switching point at a high point and outputs a switching signal. Then, the tangential speed calculator 21 calculates the new tangential speed using the gain G at the time of detecting this switching point and the dummy remaining length _l
v _S is calculated. The chart of this new tangential velocity v _S is as shown in chart B in FIG. Then,
By appropriately setting the dummy bias value S _SET , a balance between the mechanical loss of the winding sheet coil 1, the two rolls 2 and the winding machine drive motor 7, the speed response due to GD ^2, etc. is ensured, and the The present winding machine control device performs control according to the curve of chart H in FIG.

As described above, the winder control device of this embodiment uses a pulse generator to detect the rotational speed of the drive motor 7 for driving the winder 1 that winds the sheet material rewound by the unwinder 3. a frequency voltage converter 12 that converts the output pulse from the pulse generator 9 into voltage, a speed setter 4 that sets the winding speed of the winder 1, and a set speed from the speed setter 4. a speed reference generator 5 that receives input and generates a speed reference;
Standard length setting device 8 for setting the standard length value (constant winding value)
and a fixed length control device 1 that outputs a fixed length deceleration speed standard.
0, the speed standard from the speed standard generator 5, and the standard deceleration speed standard from the standard length control device 10 to determine which of them should be output with priority, and if the speed standard is higher than the standard deceleration speed standard from the standard length control device 10. A comparator 11 that outputs the standard deceleration speed standard preferentially when the deceleration speed standard is large.
, the drive motor 7 based on the output voltage from the frequency-to-voltage converter 12 and the speed reference from the comparator 11.
and a speed control device 6 that drives the fixed length control device 10, a winding value calculator 13 that calculates a winding value corresponding to the output pulse from the pulse generator 9, and a winding value calculator 13. A remaining length calculator 14 calculates the remaining length based on the winding value from 13 and the standard length value from the standard length setting device 8, and bias setting by the bias setting device 30 from the remaining length from the remaining length calculator 14. A fixed scale deceleration target calculator 15 calculates a fixed scale deceleration target value by subtracting the fixed scale deceleration target value, and a fixed scale deceleration speed reference is calculated based on the fixed scale deceleration target value and the attenuation rate from the fixed scale deceleration target calculator 15. A route calculator 16, an actual speed calculator 17 that calculates the actual speed corresponding to the output pulse from the pulse generator 9, and a gain that calculates the current gain based on the actual speed and attenuation rate from the actual speed calculator 17. A dummy bias adder 29 that calculates a dummy residual length by adding the dummy bias setting value from the dummy bias setter 28 to the remaining length from the calculator 18 and the remaining length calculator 14, and the gain from the gain calculator 18 and the dummy Tangent switching speed calculator 1 that calculates the tangential switching speed based on the dummy remaining length from the bias adder 29
9. A tangential switching point detector 20 that detects a tangential switching point by comparing the tangential switching speed from the tangential switching speed calculator 19 with the actual speed; Gain and dummy bias when detecting tangential switching by the tangential switching point detector 20 The tangential speed calculator 21 calculates the tangential speed based on the dummy remaining length from the adder 29, and before the tangential switching point detector 20 detects the tangential switching point, the fixed length deceleration speed reference from the route calculator 16 is used. After detection, the switching contact 2 switches to output the tangential speed from the tangential speed calculator 21 as a standard deceleration speed standard.
2, 23. The fixed length stop detector 26 opens the contact 27 for completing the fixed length stop when detecting that the remaining length from the remaining length calculator 14 is zero.

Therefore, when controlling the sheet material to a fixed length, it is possible to smoothly decelerate the sheet material, eliminate waste time, and accurately decelerate and stop at the fixed length value without any change in tension. As a result, by freely adjusting the bias value l _SET and the dummy bias value S _SET , any The optimal rounding and holding process can be easily adjusted for each type of winder.
As a result of this smooth rounding, there is no large variation in speed and tension variation can be greatly improved. In addition, because this tension fluctuation is small, there is no sheet breakage, wrinkles, or misalignment at the end of the take-up roll as a product, and there is less impact on the product, especially at the end of one roll, and as a result, it is almost constant. This eliminates the loss of windings and greatly improves productivity. Furthermore, by adding the dummy bias value S _SET , the vehicle does not run for a long time at the slow speed when only adjusting the bias value l _SET . In this respect, the operator is no longer irritated by slow running at slow speeds, and the productivity is greatly improved when completing a fixed length in a short time, resulting in a highly reliable winder control system. You can get it.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and for example, the winding machine control including the comparator, the speed reference generator, and the fixed length control device may be programmed using a microcomputer. It is a good thing.

As explained above, according to the present invention, it is possible to smoothly stop the material at a fixed length, reduce tension fluctuations, eliminate sheet breakage, slack, and misalignment, and accurately control the fixed length to wind up material. A highly reliable winder control device can be provided.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a winding machine control device, FIG. 2 is a diagram showing a fixed length control device in FIG. FIG. 4 is a chart diagram of speed versus time according to the prior art and the present invention, and FIG. 5 is a block diagram showing an embodiment of the present invention. 1... Winding sheet coil, 2... Two rolls supporting the winding sheet coil, 3... Unwinding coil, 4...
Speed setting device, 5... Speed reference generator, 6... Speed control device, 7... Winder drive motor, 8... Standard length setting device, 9... Pulse transmitter, 10... Standard length control device, 1
1... Comparator, 12... Frequency-voltage converter, 13...
Winding amount calculator, 14... Remaining length calculator, 15... Fixed length deceleration target calculator, 16... Route calculator, 17... Actual speed calculator, 18... Gain calculator, 19... Tangent switching speed calculator, 20 ...Tangential switching point detector, 21...Tangential speed calculator, 22...Contact for route curve speed on/off, 23...Contact for tangential speed on/off, 24...Slow movement speed setter, 25...Set length deceleration - slow movement Switching diode, 26... Fixed length stop detector, 27... Fixed length stop contact, 28... Dummy bias setter, 29... Dummy bias adder, 30... Bias setter, A... Conventional tangent chart, B... Present invention tangent chart,
C...Conventional chart when bias value l _SET is increased, D...Root curve chart, E...Chart by route curve, F...Conventional chart, G...
Conventional chart when bias value l _SET is increased,
H...Ideal chart of the present invention, I...Root curve chart.

Claims (1)

[Scope of Claims] 1. A sheet material wound into a coil is rewound by an unwinding machine, and the rewound material is wound up by a winding machine, comprising: a drive for driving the winding machine; a pulse transmitter that detects the rotational speed of an electric motor; a speed setter that sets the winding speed of the winding machine; a speed reference generator that inputs the set speed from the speed setter and generates a speed reference; a fixed length setting device for setting a fixed length value (constant winding value); a fixed length control device for outputting a fixed length deceleration speed reference; and a fixed length control device for outputting a fixed length deceleration speed standard; a comparator that compares the standard deceleration speed with a standard deceleration speed to determine which one should be output with priority, and outputs the standard deceleration speed with priority when the speed standard is larger than the standard deceleration speed; a speed control device that drives the drive motor based on the output pulse from the pulse oscillator and a speed reference from the comparator, and the fixed length control device includes: Remaining length calculation means that calculates a remaining length based on the corresponding winding value and the standard length value from the standard length setting device, and a bias setting value is subtracted from the remaining length from the remaining length calculation means to perform standard length deceleration. Fixed scale deceleration target calculation means for calculating a target value; Fixed scale deceleration speed standard calculation means for calculating a fixed scale deceleration speed standard based on the fixed scale deceleration target value and attenuation rate from the fixed scale deceleration target calculation means; gain calculation means for calculating the current gain based on the actual speed corresponding to the output pulse from the pulse generator and the attenuation rate; and a dummy residual length by adding a dummy bias setting value to the remaining length from the remaining length calculation means. dummy remaining length calculating means for calculating the length; tangential switching speed calculating means for calculating a tangential switching speed based on the gain from the gain calculating means and the dummy remaining length from the dummy remaining length calculating means; tangent switching point detection means for detecting a tangent switching point by comparing the tangent switching speed from the means with the actual speed; and from the gain and the dummy remaining length calculation means when detecting the tangent switching point by the tangent switching point detection means. tangential speed calculation means for calculating the tangential speed based on the dummy remaining length of the dummy; A winding machine control device comprising: switching means for switching to output the tangential speed from the tangential speed calculation means as a standard deceleration speed standard after detection;