JPH0236494B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding machine control device that controls winding more stably and with high precision during the manufacturing process, rewinding process, or coating process of sheet-like materials such as paper and film. It is.

In the winding machine control device, the winding machine side supports the winding sheet coil with two rolls in order to control the surface speed of the winding sheet coil, and the winding speed is controlled by driving and rotating these two rolls. control. On the other hand, the rewinder performs current control for constant tension control rather than speed control, and performs center drive of the sheet coil installed in the rewinder.

Generally, the torque T _M of a DC motor is given by T _M = K ₁ ΦI (1). where K ₁ is a constant, Φ is magnetic velocity, I
is the armature current.

On the other hand, the magnetic speed Φ is a function of the field current _If , and therefore, a predetermined magnetic flux Φ can be obtained by controlling the field current _If . In order to keep the motor torque T _M constant over the entire rotation range, there is generally a functional relationship between the field current I _f and the rotation speed N as shown in FIG. Here, since the surface speed of the unwinding coil of the unwinding machine is constant, the winding progresses and the unwinding coil diameter D
The smaller the number, the faster the rotation of the rewinding machine is required. The relationship among the field current _If , the rewinding rotation speed N, and the rewinding coil diameter D is shown in FIG. Therefore, the unwinding coil diameter D is calculated, a field current reference is created correspondingly, and the field current is controlled to this field current reference value.

On the other hand, when accelerating or decelerating a rotating body, the acceleration/deceleration torque T _A
is required, and generally T _A = GD ² /375·△N/△t (2). Here, GD ² is the moment of inertia, N is the rotational speed, and t is the acceleration/deceleration time. Also, rotating body roll diameter
D _N , rotation speed N, and rotating body roll diameter surface speed V are N=K ₂ V/D _N ...(3). _K2 is a constant.

Therefore, according to equations (2) and (3), T _A =K ₃ GD ² /375・1/D _N・△V/△t (4). However, K ₃ is a constant.

Therefore, when the winding machine accelerates or decelerates, the acceleration/deceleration rate △v/
It is determined from Δt, the rotating body roll diameter D _N and the moment of inertia GD ² at that time, and acceleration/deceleration compensation is performed using equation (4).

Here, the calculation of the unwinding coil diameter D is as follows: where the winding machine side rotational speed is N _W , the winding machine roll diameter is D _W , and the unwinding machine side rotational speed is N _U , K ₄ · N _W · D _W = From N _U・D D=K ₅・D _W N _W /N _U =K ₆・P _W /P _U ...(6) Here, K ₄ , K ₅ , K ₆ are constants, and P _W is the winding machine The winding machine count value that counts the pulses of the pulse transmitter, P _U is the count value of the rewinding machine counter that counts the pulses of the rewinding machine pulse transmitter.

The unwinding coil diameter D is calculated using equation (6) above, but the winding side count value may change due to tension fluctuations, etc.
An error occurs in P _W and the unwinding side count value P _U , and a variation occurs in the unwinding coil diameter D. Further, when a new unwinding coil is installed in the unwinding machine, the operator needs to set the new unwinding coil diameter. However, if the set value of the new unwinding coil diameter is different from the true value, a deviation will occur between the unwinding coil diameter calculated by the calculation at the start of operation. Due to variations in the diameter of such a rewinding coil, errors occur in the field current control or acceleration/deceleration compensation described above, and as a result, the rewinding machine cannot rotate smoothly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a winder control device that eliminates the above-mentioned conventional drawbacks and allows smooth winding over the entire range from the start of operation of the winder to the stop when winding is completed.

An embodiment of the present invention will be described below with reference to the drawings. In Fig. 2, numerals 1 to 6 indicate winding machine equipment, where 1 is a winding machine that winds a coil, 2 is a pair of driving rolls that drive this winding machine 1, and 3 is each driving roll. A pair of winding machine drive motors 2 drive the winding machine 1, respectively, and a winding machine pulse transmitter 4 detects the speed and acceleration/deceleration of the winding machine 1. A speed control device 5 receives the speed signal from the pulse transmitter 4 and controls the speed of the winding machine 1 based on the speed reference value of the speed setting device 6.

Reference numerals 7 and after indicate rewinding machine system equipment. Reference numeral 7 denotes a rewinding machine on which a rewinding coil is wound, 8 a driving roll of this unwinding machine, 10 a rewinding machine drive motor, 16 a field winding of this motor 10, and 17 a field current control. 12 is a current detector that detects the current of the rewinding machine drive motor 10; 13 is a current control device that controls the current of the drive motor 10 based on the detected value of the current detector 12; 11 is a current detector of the rewinding machine 7; This is a rewinding machine pulse transmitter for speed detection.

Further, 24 is a rewinding machine counter for counting the pulses of the rewinding machine pulse transmitter 11, 25 is a winding machine counter for counting the pulses of the winding machine pulse transmitter 4, and 22 is both of these pulse counters. A rewinding coil diameter calculator that calculates the rewinding coil diameter based on the count values 24 and 25, a coil diameter setting device 23 that sets an initial coil diameter in the rewinding coil diameter calculator 22, and 18 the field current control. 20 is an acceleration/deceleration detection circuit that detects the rewinding/deceleration of the winding machine 1 from the output of the winding machine pulse generator 4, and 19 is a field function generator that provides a field reference to the device 17; The present invention is characterized by an acceleration/deceleration compensation circuit 21 that calculates an acceleration/deceleration compensation value for current compensation during acceleration/deceleration based on the acceleration/deceleration value of the acceleration/deceleration detection circuit 20. The calculated unwinding coil diameter value is applied to the acceleration/deceleration compensation circuit 19.
and a rewinding coil diameter determining device 14 that determines whether or not to apply it to the field function generator 18; This is an adder that provides a current reference to the current control device 13 based on a compensation value.

FIG. 3 shows a specific circuit example of the rewinding coil diameter determining device 21. In the figure, 26 is an upper limit comparator for comparing the upper limit value with the previous value of the unwinding coil;
7 is a lower limit comparator that compares the lower limit with the previous value of the rewinding coil, 28 is a subtractor that subtracts a certain value from the previous value of the rewinding coil, and 29 is an adder that adds a certain value to the previous value of the rewinding coil. , 30 is a determiner for determining the value of the unwinding coil obtained this time, 31 is a buffer for unwinding coil diameter that stores the unwinding coil diameter D calculated by the unwinding coil diameter calculator 22 of FIG. 2, 32 33 is a buffer for the old unwinding coil diameter that stores the previously determined unwinding coil diameter D _OLD , 33 is a buffer for the new unwinding coil diameter that stores the newly determined unwinding coil diameter D _NEW ,
34 is an OR circuit, 35 is a data bus, and broken lines indicate respective gate signals.

Next, the operation of the above-mentioned component device will be explained. FIG. 4 is a diagram showing temporal changes in the unwinding coil diameter D.
In this figure, the movement of the ideal unwinding coil diameter D will be explained. At time t=0, a new unwinding coil is attached to the unwinding machine 7, and its tip is brought to the winding machine side to set it in a state where it can be wound. At this point, the operator actually measures the new unwinding coil diameter and inputs the measured value into the unwinding coil diameter calculator 22 using the setting device 23.
Set to . When the new unwinding coil diameter is set as DT in FIG. 4 and the winding machine 1 is operated, the current unwinding coil diameter D is calculated by the unwinding coil diameter calculator 22. Furthermore, as the unwinding progresses sequentially, the unwinding coil diameter D decreases as shown by a curve 36 in FIG.

However, due to the reasons described above, variations occur in the calculated unwinding coil diameter D. Therefore, in the present invention, first, the difference between the rewinding coil diameter value D _OLD used in the previous sampling field function generator 18 and the acceleration/deceleration compensation circuit 19 and the rewinding coil diameter value calculated this time is calculated as shown in FIG. Lower limit values such as α and β, that is, limit values are set. For the newly calculated rewinding coil diameter D that falls within the above-mentioned difference within this limit value, the field function generator 18 generates a field current reference I _f for the rewinding coil diameter D as shown in FIG. Alternatively, at the time of acceleration/deceleration, the acceleration/deceleration compensation circuit 19 calculates an acceleration/deceleration torque compensation value using the calculation shown in equation (4).

Here, a case will be described in which, although a coil having a new rewound coil diameter D which is outside the limit value is used, this is ignored and the previous rewound coil diameter _DOLD is used as is. For example, in FIG. 4, the true unwinding coil diameter is D _T , whereas the initial setting is D _INZ . When operation is started with this initial value, the upper limit α
Since it is outside, the previous value, that is, D _INZ , continues to be used in the field function generator 18 or the acceleration/deceleration compensation circuit 19, resulting in the behavior as shown in FIG. 437. As a result, in FIG. 1, I _fINZ corresponding to D _INZ continues to flow into the field 16 through the field function generator 18 and the field current controller 17.
Generally, N=V-IR/Φ (7) where the rotation speed N of the current motor, the field Φ, the armature voltage V, the armature current I, and the armature resistance R are satisfied. Here, if IR≒0, then V=N・Φ...(8). Here, if the above I _fINZ continues to flow, the field Φ
is constant. However, since the diameter D of the unwinding coil decreases, the motor rotational speed N must continue to increase in order to keep the surface speed of the unwinding coil constant. In other words, as shown in equation (8), the current control device 13 performs control in the direction of increasing the armature voltage V. However, if the control continues as it is, the motor permissible voltage will be exceeded, and the overvoltage prevention circuit in the current control device 13 will operate, causing an emergency stop during winding.

From the above results, in the present invention, if the above-mentioned upper limit value α and lower limit value β are exceeded, for example, if the previous value rewinding coil diameter D _OLD is deviated from the upper limit value α with respect to the true value, then Instead of using the unwinding coil diameter D calculated by the unwinding coil diameter calculation circuit 22 as the current value, subtract a certain value γ ₁ from the previous unwinding coil diameter D _OLD , such as D _OLD- 〓 ₁ , and get this value. New unwinding coil diameter
D _NEW to be used in the field function generator 18 and acceleration/deceleration compensation circuit 19.

Now, set the initial unwinding coil diameter as above.
D _INZ . In addition, the true initial unwinding coil diameter is D _T , and the unwinding coil diameter calculator 22 uses the curve 36 in FIG.
If we continue to calculate the value of
From D _INZ , γ continues to decrease by ₁ at each sampling, and when it reaches the upper limit value α, it is switched to the true value calculated by the unwinding coil diameter calculation circuit 22, and the true unwinding coil diameter is determined. Match. In other words, Figure 4 3
8 curve.

As described above, upper and lower limits are set for the difference between the true value of the currently calculated unwinding coil diameter and the previously calculated unwinding coil diameter (previous value) currently used for control, and the above true value and The unwinding coil diameter determining device 21 has an additional function to smoothly approach the true value when the difference from the previous value deviates from this set value. The operation of a specific example of the unwinding coil diameter determining device 21 will be explained with reference to FIG. The previously used unwinding coil diameter D _OLD is stored in the old unwinding coil diameter buffer 32, and the unwinding coil diameter calculator 22 calculates a new unwinding coil diameter D and stores it in the unwinding coil diameter buffer 31. Assuming that the data is stored and a gate signal indicating the completion of the operation is generated, the upper limit comparator 26 takes out D _OLD and D through the data bus 35 in response to the operation completion gate signal, and also outputs the upper limit value α1 held internally.
Compare D _OLD −α>D based on . As a result, a gate signal is output to the subtracter 28 if true, and to the lower limit comparator 27 if false. When true, the subtractor 28 subtracts γ ₁ from D _OLD as shown above, and uses the result as buffer 3 for unwinding new coil diameter.
3 and issues a gate signal to the next stage. When it is false, the lower limit comparator 27 operates and executes D _OLD +β>D. If the result is true, a gate signal is issued to the adder 29, and if false, a gate signal is issued to the determiner 30. When true, the adder 29 adds a certain γ ₂ to D _OLD , stores the result in the unwinding new coil diameter buffer 33, and issues it as a gate signal to the next stage. When it is false, the determiner 30 stores the rewinding coil diameter D obtained through the calculation in the rewinding new coil diameter buffer 33, and issues a gate signal to the next stage.

Through the above operations, a new unwinding coil diameter D _NEW is determined for the field function generator 18 or the acceleration/deceleration compensation circuit 19, and a gate signal is generated. Unwinding old coil diameter D _OLD of buffer 32 for unwinding coil diameter
are field function generator 18 and acceleration/deceleration compensation circuit 19
The new coil diameter D _NEW is used for unwinding and is replaced with the new coil diameter D _NEW when the calculation is completed.

The upper limit value α and lower limit value β used above are values within the range of change values allowed in one sampling in rewinding machine control, and there is also a certain correction value γ ₁ due to exceeding the upper limit and a certain correction value due to exceeding the lower limit. The value γ ₂ may be a constant or a function, such as an exponential, for the value of D _OLD −D.
Incidentally, similar effects can be achieved even when this control device is a programmable control device such as a microcomputer. FIG. 5 is a flowchart in that case.

As explained above, for the difference between the calculated rewinding coil diameter value obtained when the operation starts and the previous rewinding coil diameter value used to calculate the acceleration/deceleration compensation value of the rewinding machine,
Upper and lower limits are provided, and if the difference between the diameter value of the rewinding coil used to control the rewinding machine and the winding machine exceeds the limit, The unwinding coil diameter value is corrected by a predetermined value and used for the above control, and when the unwinding coil diameter value is within the limit, it is switched to the calculated unwinding coil diameter value and used for the above control. Since the control of the take-up machine is continued, if the limit is exceeded, the unwinding coil can be smoothly brought close to the true value. Therefore, there is no emergency stop in the entire winding range, making it smooth and even. Stable control becomes possible, and as a result, there is no sagging, excessive tension, damage, etc. of the sheet, and it becomes possible to manufacture high-quality sheet materials.

[Brief explanation of drawings]

Figure 1 shows the field current I _f of the unwinding coil diameter D of the unwinding machine.
Figure 2 is a block diagram of an embodiment of the present invention, and Figure 3 is a diagram of _the same embodiment. A circuit example diagram of a rewinding coil diameter determination device, FIG. 4 is a rewinding coil diameter D-time characteristic diagram for explaining the operation of the same embodiment, and FIG. 5 is a flowchart showing the rewinding coil diameter determination function. This is a diagram. 1... Winder, 3... Winder drive motor, 4...
... Winder pulse transmitter, 5 ... Speed control device, 7
...Rewinder, 9...Tension detector, 10...Rewinder drive motor, 11...Rewinder pulse transmitter, 13
... Current control device, 14 ... Adder, 15 ... Tension setting device, 17 ... Field current control device, 18 ...
Field function generator, 19... Acceleration/deceleration compensation circuit, 2
DESCRIPTION OF SYMBOLS 1... Rewinding coil diameter determination device, 22... Rewinding coil diameter calculator, 23... Coil diameter setting device, 24...
Rewinding machine counter, 25... Winding machine counter,
36...Rewinding coil diameter true value curve, 38...Curve for correcting an excessive error in the initial rewinding coil diameter.

Claims (1)

[Scope of Claims] 1. A winder for winding the unwinding coil on the unwinding machine side, a pulse transmitter for detecting the speed and acceleration/deceleration of the winding machine, and a pulse generator for detecting the speed of the unwinding machine. It has a pulse oscillator for detection and an acceleration/deceleration compensation value calculation circuit for calculating an acceleration/deceleration compensation value, and calculates the unwinding coil diameter from the outputs of both the pulse oscillators,
The current of the winding machine is controlled by the added value of the deviation between the acceleration/deceleration compensation value and the tension feedback value obtained from the calculated unwinding coil diameter and the acceleration/deceleration value of the winding machine, and the winding coil diameter is In a winding machine control device that controls the field current of the winding machine in accordance with upper and lower limits are set for the difference between the above, and the difference between the current and previous calculated unwinding coil diameter values is calculated, and if this difference is outside the upper and lower limits, the previous unwinding coil diameter is A rewinding coil diameter judgment device is provided which adds or subtracts a predetermined value to correct the current calculated rewinding coil diameter value and uses the rewinding coil diameter value instead of the current calculated rewinding coil diameter value. The rewinding coil diameter value determined by the rewinding coil diameter determination device is provided to the acceleration/deceleration compensation value calculation circuit and the field function generator to be used for acceleration/deceleration compensation value calculation and field control. Machine control device.