JPH02117566A - Constant speed movement control device for cable - Google Patents

Abstract

PURPOSE:To control the moving speed of a cable to a specified value by a method wherein a pulse frequency signal from a pulse encoder detecting movement of a cable and a speed command input are inputted to a comparing circuit, a control power from the comparing circuit is fed to a motor for rotating a cable drum, and running of the motor is controlled so that the frequency signal is always regulated to a specified value. CONSTITUTION:A pulse frequency signal 6a from a pulse encoder 6 detecting movement of a cable and a speed command input 13 are inputted to a comparing circuit 12. Based on a deviation signal from the comparing circuit 12, a control power 14a from a power amplifier 14 is fed to a drive motor 2 for rotating a cable drum 4, and running of the motor 2 is controlled so that a pulse frequency signal is always 1 regulated to a specified value. As a result, the cable can be moved at a normally given speed despite of the diameter of the cable drum 4 and an amount of wound cable.

Description

Detailed Description of the Invention a. Industrial Application 1 Shuttle The present invention relates to a constant speed movement control device for cables, and in particular, to a device for controlling constant speed movement of cables, regardless of the amount of winding of the cable wound around the cable drum and the diameter of the cable drum. First, it relates to a new improvement for making it possible to always move the cable at a constant speed.

B. Conventional Technology There are various constant speed movement control devices for cables of this type that have been used in the past, but to describe a typical configuration, here we will list the names of documents showing the conventional configuration. However, the following commonly used configuration can be disclosed.

In other words, when using an electric cable reel to unwind or unwind a cable that has been wound multiple times around the cable drum, if the rotational speed of the motor is constant, the unwinding and unwinding speed of the cable will be the same as that of the cable drum. It changes depending on the winding layer of the cable in H, and it is faster when there are many winding layers, and slower as there are fewer winding layers.

Therefore, calculation control had to be performed to change the speed of the drive motor for each layer of cable winding on the cable drum.

C1 Problems to be Solved by the Invention Since the conventional cable constant speed movement control device was configured as shown below, the following problem I+1 existed.

In other words, in order to control the rotational speed of the motor for each layer of cable winding, extremely complicated calculation control must be performed, making the entire control system extremely expensive and making it impossible to create a low-cost control system. Met.

In addition, it is extremely difficult to perform continuous high-precision control of the drive motor for each rotation of the winding layer, and if the diameter of the cable drum changes, the control settings must be changed, so it is difficult to make a one-size-fits-all type. was impossible.

The present invention has been made to solve the above-mentioned problems, and in particular, it is possible to move the cable at a constant speed regardless of the amount of cable wound around the cable drum and the diameter of the cable drum. It is an object of the present invention to provide a constant speed movement control device for a cable that can perform winding and unwinding.

66 Means for Solving the Problems A constant speed movement control device for a cable according to the present invention has a cable wound around a Kelpuru drum, and the movement speed of the cable is determined by rotating the cable drum with a drive motor. A pulse encoder that detects movement of the cable and outputs a pulse frequency signal, a comparison circuit that inputs the pulse frequency signal, a speed command input that is input to the comparison circuit, and an output of the comparison circuit. This configuration includes a power-up for inputting the power and supplying control power to the motor.

In the cable constant speed movement control device according to the present invention, a pulse frequency signal and speed command input from a pulse encoder that detects movement of the cable are input to a comparator circuit, and a deviation signal from the comparator circuit is input. The control power from the power-up is supplied to the lower movement motor, and the pulse frequency signal is controlled so that it is always at a predetermined level, so the cable is always moved at a predetermined speed regardless of the diameter of the cable drum and the amount of cable winding. can be done.

f. Embodiments Hereinafter, preferred embodiments of the constant speed movement control device for cables according to the present invention will be described in detail with reference to the drawings.

1 to 6 are for showing a constant speed movement control device for cables according to the present invention, FIG. 1 is a block diagram, FIG. 2 is a front view showing a cable supply device, and FIG. 3 is a diagram showing a cable supply device. FIG. 3 is a side view of FIG. 2;

First, in the cable supply device shown in FIGS. 2 and 3, what is indicated by the reference numeral 1 is a frame body, and a drive motor 2 consisting of a C motor capable of forward and reverse rotation is installed in the lower part 1a of this frame body 1. At the same time, a cable drum 4 on which a cable 6 is wound in a multi-layered manner is rotatably mounted on the upper part 1b.
- The drive motor 2 and the cable drum 4 are drivably connected via a transmission belt 5.

An encoder drive wheel 6b of the pulse encoder 6 is provided on the side portion 1c of the frame 1, and rotates while connected to the cable 6, and outputs a pulse frequency signal 6a. The cable drum 4
A guide roller 7 is disposed between the two.

11. A cable aligning and winding device 9 guided by a plurality of guide shafts 8 is disposed near the cable drum 4 in the frame 1 so as to be able to reciprocate in the direction of arrow A. A control panel 10 is provided on the side portion 1c of the frame 1.

The pulse frequency signal 6a of the pulse encoder 6 is input to a frequency/voltage converter 11, converted into a voltage, and then input to a comparison circuit 12 as an analog voltage signal +1a.

A speed command human power 13 for moving (winding or unwinding) the cable 3 at a predetermined speed is input to the comparison circuit 12, and a deviation signal 12 from the comparison circuit 12 is inputted to the comparison circuit 12.
a is input to the drive motor 2 through the power-up 14.

The cable constant speed movement control device according to the present invention is configured as described above, and its operation will be explained below.

Supplying power (not shown) 1. The drive motor 2 rotates,
When the cable 3 is fed out or wound up, the cable 6 is moved in either direction, and this movement of the cable 3 causes the pulse encoder 6 to move through the encoder drive wheel 6b, depending on the movement of the cable 3 at that time. A pulse frequency signal 6a having a corresponding speed is output.

This pulse frequency signal 6a is transmitted to a frequency/voltage converter 11.
After being converted into an analog voltage signal 11a by the comparator 12
A speed command input 13 for sending the cable 3 at a predetermined speed is also input to the comparator 12.

Therefore, based on the deviation signal 2a from the ratio/shark circuit 12, the pre-control power +4a from the power up 14 is
7til so that the pulse frequency WUa signal 6a supplied to the drive motor 2 and from the pulse encoder 6 is always at a predetermined value.
Therefore, the cable can always be moved at a predetermined speed regardless of the diameter of the cable drum 4 and the number of windings of the cable.

1^j. In the above-mentioned example 1, we have described the case where analog signals were used for the signals input to the analogue device 12, but it is also possible to control using digital signals. Of course.

g0 Effects of the Invention Since the cable constant speed movement control device according to the present invention is configured as described above, it is possible to obtain the following effects.

That is, the pulse frequency signal and speed command input from the pulse encoder that detected the movement of the cable are input to the comparator circuit, and the control power from this comparator circuit is supplied to the drive motor so that the pulse frequency signal is always at a predetermined level. Therefore, the cable can always be moved at a predetermined speed regardless of the diameter of the cable drum and the winding of the cable.

[Brief Description of the Drawings] Figures 1 to 3 are for illustrating a cable constant speed movement control device according to the present invention, where Figure 1 is a block diagram and Figure 2 is a cable supply device. The front view and FIG. 6 are side views of FIG. 2. 2...' riveting motor, 3... cable, 4 cable drum, 6 - pulse encoder, 6a is pulse frequency signal, 11... frequency/voltage converter, 12... comparator circuit,
j2a... Deviation signal, 16... Speed command input, 14...
Power amplifier, i4a... It's an amazing power. Patent creator

Claims (2)

[Claims] (1) Cable (3) wound around cable drum (4)
), wherein the cable drum (4) is rotated by a drive motor (2) to determine the moving speed of the cable (3). A pulse encoder (
6), a comparison circuit (12) to which the pulse frequency signal (6a) is input, a speed command input (13) to be input to the comparison circuit (12), and a deviation signal (12a) of the comparison circuit (12). and a power-up (14) for supplying control power (14a) to the drive motor (2) by inputting the pulse frequency signal (6a) to the drive motor (2) so that the frequency of the pulse frequency signal (6a) is constant. A constant speed movement control device for a cable, characterized in that the device controls constant speed movement of a cable. (2) The pulse frequency signal (6a) is input to the comparator circuit (12) as an analog voltage signal (11a) by a frequency/voltage converter (11), and the speed command input (13) is input as an analog voltage signal (11a). 2. The constant speed movement control device for a cable according to claim 1, characterized in that the device comprises: