JPH11240652A - 2-axis turret controller - Google Patents

Abstract

(57) [Problem] To provide a two-axis turret control device capable of performing stable tension control without delay. A turret device 1A, a rewinding machine 2, 2A provided therein, a reference roll 4, a dancer roll 3, and a turret revolution control device, a rewinding machine control device, a reference roll control device, and a dancer for controlling these. A two-axis turret control device configured to correct the rotation speed of the rewinding machine 2 when the turret device 1A revolves,
In addition to setting the optimal rotation speed of the turret device 1A according to the line speed, a set value of the turret arm diameter,
From the current calculated value and the turret revolution speed command value,
The speed command of the sheet material speed sent out by the rewinding machine 2 is corrected,
The rotation speed command of the rewinding machine is converted into an input to the rewinding machine control device.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewinding control and a turret control of a rewinding device for a strip-shaped material such as paper, film and metal. 2. Description of the Related Art Conventionally, a turret device for feeding a coil-wound material to a part of a facility for processing a sheet material such as paper, film, and metal, a roll for conveying the sheet material,
There is a dancer role. The configuration of these facilities is as follows, and will be described with reference to FIG. In FIG.
1A is a turret device provided with two rewinding machines 2 and 2A, and revolves and revolves the rewinding machines 2 and 2A to feed out the sheet material 1. When the sheet material 1 wound with the coil is sent out from the rewinding machine 2 of the turret device 1A, the sheet material 1 is conveyed while being controlled in speed by the reference roll 4, and the turret device 1A
The tension of the sheet material 1 is controlled to be constant by the dancer roll 3 provided between the sheet roll 1 and the reference roll 4. By keeping the tension constant, the processing of the sheet material 1 by another device is performed well, and the quality of the final product can be kept high. When the coil of the rewinding machine 2 is almost exhausted, the turret device 1A revolves the rewinding machines 2 and 2A and replaces them, and sends out the sheet material 1 from a new coil mounted on the rewinding machine 2A. When the turret device 1A operates to revolve the rewinding machines 2 and 2A clockwise, the speed is corrected to a constant speed control of the rewinding machine 2 rotating counterclockwise in order to prevent a tension variation in the sheet material 1. Is applied. As described above, the tension is kept constant by the speed correction of the rewinding motor and the function of the dancer roll during turning of the turret, and the tension is kept constant by the action of the dancer roll during transport. The configuration of the device having such a function is as follows. The reference roll 4 includes a reference roll motor 15 connected to the reference roll 4.
And a reference roll speed detector 18 for detecting the rotation speed.
A line speed setting device 20, a comparator for comparing the signal with a signal from a reference roll speed detector 18, a reference roll speed controller 17 which operates in response to the signal, and a reference roll motor 15 The rotation speed is controlled by a reference roll control device including a reference roll motor driving device 16 for driving the sheet material, and the line speed of the sheet material 1 is controlled to be constant. The turret device 1A includes a turret motor 5 for revolving the rewinding machines 2 and 2A, a turret motor driving device 6 for driving the turret motor 5, and a turret device 1
Turret rotation speed setting device 25 for setting the revolution speed of A
And a turret rotation speed commander 24 that receives the signal to command the revolution speed of the turret device 1A and a turret speed controller 7 that receives the signal and gives a command to the turret motor drive device 6. The rotation is controlled by the control device. The rewinding machine 2 includes a rewinding motor 8 connected to the rewinding machine 2, a rewinding speed detector 11 for detecting the rotation speed, a comparator for comparing the signal with a speed command, and inputting the signal. The rotation of the motor is controlled by a rewinding machine control device including a rewinding speed controller 10 for controlling the speed of the rewinding motor 8 and a rewinding motor control device 9 for driving the rewinding motor 8 according to the command. ing. When the turret device 1A operates to revolve the rewinding machines 2 and 2A, and the rewinding machine 2A comes to the position of the rewinding machine 2, the rotation is controlled by the same configuration. The dancer roll 3 is pulled by a pulling device (not shown) so that the tension of the sheet material 1 becomes constant. Reference numeral 12 denotes a dancer roll position detector for detecting the position of the dancer roll 3 necessary for controlling the tension to be constant, and a signal from the dancer roll position detector 13 for setting the target position of the dancer roll 3 is provided. The signal compared by the comparator is input to a dancer roll position controller 14 for controlling the position of the dancer roll 3, and a speed correction signal corresponding to the input signal is output. Then, the sum of the correction signal and the signal of the line speed setting unit 20 becomes the speed command of the rewinding control device. Reference numeral 19 denotes a rewind diameter calculating device which receives signals from the reference roll speed detector 18 and the rewind speed detector 11 and calculates the coil diameter of the rewinding machine 2, and 22 denotes a turret arm for setting a turret arm diameter. Upon receiving the signal of the diameter setting device 21, the signal of the turret angle detector 7A for detecting the revolving angle of the turret device 1A, and the signal of the rewind diameter calculating device 19, the speed of the rewinding machine when the turret device 1A revolves. Is a turret compensator that corrects and outputs the result. Reference numeral 23 denotes a contact that is closed when the turret device 1A turns, and transmits a signal of the turret compensating device 22. The signal obtained by adding the signal of the line speed setter 20 and the signal of the dancer roll position controller 14 is further added to the contact 2
3 and compared with the signal of the turret compensator 22;
It is input to a divider 28. The calculation result of the divider 19 which receives the signal of the rewind diameter calculating device 19 as the other input is newly set as a speed command of the rewinding device control device. Thus, the position of the dancer roll 3 is controlled while the rotation speed of the rewinding machine 2 is corrected, and the tension of the sheet material 1 is indirectly kept constant.
As described above, conventionally, when the turret device 1A revolves, calculation is performed using the turret diameter and the turret angle,
The sheet material 1 is corrected by correcting the speed command of the rewinding machine 2.
The fluctuation of the tension was suppressed. However, in the conventional method, since the following disadvantages remain, the sheet material 1 being conveyed meanders, which may cause the worst case of breakage. There was a serious problem. (1) The speed correction is a calculation after the turret angle is detected, and a delay occurs and a change in the position of the dancer roll is large. (2) Since the corrected speed is applied to the rewinding machine by turning the turret, the output value of the diameter calculation of the rewinding machine changes, whereby the rotational speed command of the rewinding machine becomes unstable, resulting in tension disturbance. Outbreak. (3) Since the rotation speed of the turret is constant irrespective of the transport speed of the sheet material, when the transport speed is low, the speed correction amount exceeds the capability of the dancer roll, and the tension control becomes impossible. Accordingly, an object of the present invention is to provide a two-axis turret device capable of performing stable tension control without delay by optimizing a turret speed command. SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a turret device which revolves and revolves two rewinding machines to feed a sheet material, and a method for rotating the sheet material at a constant speed. A reference roll to be conveyed, a dancer roll that applies a constant tension to the sheet material, a turret rotation speed setting device that sets the number of revolutions of the turret device, and a turret that commands the revolution speed of the turret device in response to the command. A turret revolution control device for controlling the revolution speed of the turret device based on the signal of the turret revolution command device; and A rewinding device control device for controlling a rotation speed to rotate at a given speed, a line speed setting device for setting a speed of the sheet material, and a rotation speed of the reference roll A reference roll control device that includes a reference roll speed detector that detects a degree, and controls a rotation speed of the reference roll,
A dancer roll control device including a dancer roll position controller for performing position control by comparing the position of the dancer roll with a set position, and correcting the rotation speed of the rewinding machine when the turret device revolves. In the two-axis turret control device, a turret optimum rotation speed generator for generating an optimum revolution speed of the turret device in response to a signal from the line speed setter, the turret rotation speed setting device and the turret optimum rotation speed generator A turret rotation speed comparator that compares signals from the device and outputs a signal to the turret rotation speed commander, a turret speed detector that detects the revolution speed of the turret device, and an output side of the turret rotation speed commander. A signal of the turret speed detector is subtracted from a signal of the turret rotation speed commander to perform correction. A comparator, a rewind diameter calculation device for inputting a signal of the reference roll speed detector and a rotation speed detection signal of the rewinding machine to calculate a rewinding machine diameter, a turret arm diameter setting device, and the turret arm A turret compensator for receiving a signal of a diameter setting device, a signal of the turret rotation speed commander, and a signal of the rewind diameter calculation device, and outputting a first signal to the rewind diameter calculation device; And the signal of the difference between the signal of the dancer roll position controller,
A signal obtained by comparing the second output signal of the turret compensator with one input, and dividing the output of the rewind diameter calculating device as the other input to obtain a speed command of the rewinding machine controller. And a container. With such a configuration, the swing of the dancer roll is reduced, stable tension control is obtained over a wide operating speed range, and turret control without meandering and breaking of the material is realized. An embodiment of the present invention will be described below with reference to FIG. Of the components used in FIG. 1, those used in FIG. 2 are approximately the same,
Components not shown in FIG. 2 and components slightly different from the components in FIG. 2 will be described. In FIG. 2, reference numeral 7B denotes a turret speed detector which is connected to the turret motor 5 and detects its rotation speed.
Is compared by a comparator provided between the turret speed commander 24 and the turret speed controller 7, and a difference signal is input to the turret speed controller 7.
Since the speed feedback control is performed by this configuration,
The revolving speed of the turret device 1A corresponds to the turret rotation speed command unit 24. By the way, 27 is a turret optimum rotation speed generator for generating the optimum rotation speed of the turret device 1A from the signal of the line speed setting device 20 so that the dancer roll does not fall out of control. The smaller of the signal and the signal of the turret rotation speed setting device 25 is output. Since the smaller signal is output to the turret rotation speed commander 24, the turret device 1A fluctuates in revolution speed in conjunction with the line speed so that other equipment is not burdened. A turret compensator 22 receives a signal from the turret arm diameter setting device 21, a signal from the rewind diameter calculator 19, and a signal from the turret rotation speed commander 24, and outputs a first signal to the rewind diameter calculator 19. . Second
Is further added to a signal obtained by adding the signal of the line speed setting device 20 and the signal of the dancer roll position controller 4 to obtain a corrected speed command of the rewinding machine 2 as a divider 28.
Input. Then, by dividing the speed command and the diameter estimated by the rewind diameter calculator 19, a corrected rotational speed command of the rewinding machine 2 is obtained and input to the rewinding machine control device. As described above, the turret compensating device 22 determines the speed variation of the rewinding machine 2 caused by the turret rotation based on the rewind diameter of the rewind diameter calculation device 19 and the rotation speed command of the output of the turret rotation speed command device 24. A speed correction signal is obtained and output. Further, the speed correction is output to the rewind diameter calculation device 19 to correct the change in the rewind diameter due to the speed change of the rewinding machine 2 during the turret turning. At this time, by making the correction signal sufficiently shorter than the rewind diameter calculation cycle,
The stability of the arithmetic system is sufficiently ensured. As described above, according to the present invention, the change in the path length and the change in the unwinding diameter during the turning of the turret and the optimum selection of the turret speed are performed, so that the dancer roll sways. , Turret control without meandering and breakage of the material is realized. The effect of further increasing the gain of the dancer roll position controller can be obtained by reducing the swing of the dancer roll.

[Brief description of the drawings] FIG. 1 shows an embodiment of the present invention. FIG. 2 shows an example of conventional two-axis turret control. [Explanation of symbols] 1 sheet material 1A Turret device 2 (in operation) rewinding machine 2A (to be used for the next operation) 3 Dancer roll 4 Standard roll 5 Turret motor 6 Turret motor drive 7 Turret speed controller 7A Turret angle detector 7B Turret speed detector 8 Rewind motor 9 Rewinding motor control device 10 Rewind speed controller 11 Rewind speed detector 12 Dancer roll position detector 13 Dancer roll position setting device 14 Dancer roll position controller 15 Reference roll motor 16 Reference roll motor drive 17 Reference roll speed controller 18 Reference roll speed detector 19 Rewind diameter calculation device 20 Line speed setting device 21 Turret arm diameter setting device 22 Turret compensator 23 contacts 24 Turret rotation speed commander 25 Turret speed setting device 26 Turret speed comparator 27 Turret optimum rotation speed generator 28 Divider

Claims (1)

Claims 1. A turret device for feeding a sheet material by revolving and rotating two rewinding machines, a reference roll for conveying the sheet material at a constant speed, and a dancer roll for applying a constant tension to the sheet material. A turret rotation speed setting device for setting the number of revolutions of the turret device, and a turret rotation speed command device for commanding the revolution speed of the turret device in response to the command, based on a signal from the turret rotation speed command device. A turret revolution control device that controls the revolution speed of the turret device, and a rewinding device control device that detects the rotation speed of the unwinding device and controls the rotation speed of the unwinding device to rotate at a given speed. A line speed setting device for setting the speed of the sheet material, and a reference roll speed detector for detecting a rotation speed of the reference roll, wherein the reference roll A reference roll control device for controlling the rotation speed, and a dancer roll control device including a dancer roll position controller for controlling the position by comparing the position of the dancer roll with a set position, and revolving the turret device. A two-axis turret control device that sometimes corrects the rotation speed of the rewinding machine; a turret optimum rotation speed generation device that receives a signal from the line speed setting device and generates an optimum revolution speed of the turret device; A turret rotation speed comparator that compares a signal of the rotation speed setting device and the signal of the turret optimum rotation speed generator and outputs a signal to the turret rotation speed commander, and a turret speed detector that detects a revolution speed of the turret device. , Provided on the output side of the turret rotation speed commander, the signal from the turret rotation speed commander A comparator for subtracting and correcting the signal of the turret speed detector; and a rewind diameter calculation device for calculating the rewinding machine diameter by inputting the signal of the reference roll speed detector and the rotation speed detection signal of the rewinding machine. A turret arm diameter setting device, receiving a signal of the turret arm diameter setting device, a signal of the turret rotation speed commander, and a signal of the rewind diameter calculation device, and transmitting a first signal to the rewind diameter calculation device. A turret compensator to be output, a signal of a difference between a signal of the line speed setting device and a signal of the dancer roll position controller, and a signal obtained by comparing a second output signal of the turret compensator as one input, A two-axis turret control device, comprising: a divider that divides the output of the rewind diameter calculation device as the other input and sets the result as a speed command of the rewind device control device.