CN205809671U - A CNC engraving machine and its I/O control board control circuit - Google Patents

Abstract

The utility model discloses a control circuit of IO control panel, including 3 branch control circuit of branch X axle, Y axle and Z axle, each branch control circuit all includes limit switch and auxiliary relay, and auxiliary relay includes coil and normally open contact, and coil and limit switch setting are in the same power supply circuit who is provided electric energy by the power, and normally open contact's first end is connected with the IO control panel, and normally open contact's second end is connected with the power. Because the influence of the intermediate relay on the weak signal is small, when the weak signal exists, the coil of the intermediate relay is not influenced, and the influence of an interference signal can be reduced by the I/O control panel. Because the I/O control board is directly controlled by the intermediate relay, the distance between the intermediate relay and the I/O control board can be set closer, and the problem that a cable line between the limit switch and the I/O control board is longer can be avoided. Furthermore, the utility model discloses still disclose a CNC engraver, contain control circuit, the effect as above.

Description

A CNC engraving machine and its I/O control board control circuit

technical field

The utility model relates to the field of electronic technology, in particular to a CNC engraving machine and a control circuit of an I/O control board thereof.

Background technique

CNC engraving machines are widely used in the field of wood processing, mainly including host, machine tool and I/O control board and other components. The I/O control panel plays an important role in the wood processing process as a control component for input and output. However, in the actual application process, the control circuit of the I/O control board (referring to the input circuit part of the control circuit in this article) often malfunctions, causing the host to receive interference signals, causing faults such as display flickering, and resulting in abnormal processes. . FIG. 1 is a control circuit diagram of an I/O control board in the prior art. The host computer 10 is connected with the I/O control board 11, and performs corresponding operations according to the input signal of the I/O control board. The I/O control board 11 is connected to the power supply through switches. Specifically, the I/O control board 11 has 3 switches, which are divided into limit switch SQ1 for the X axis, limit switch SQ2 for the Y axis and SQ3 for the Z axis. When the limit switch SQ1 or the limit switch SQ2 or the limit switch SQ3 is closed, the electronic devices in the I/O control board 11 are powered on. Due to the limitation of the actual operating environment, the cable lines between each limit switch and the I/O control board 11 are impossible to be too short. Due to the influence of weak signals of distributed capacitance in the cable, the electronic devices in the I/O control board 11 are easily triggered by mistake, causing failures such as equipment shutdown.

It can be seen that how to reduce the impact of interference signals on the I/O control board is an urgent problem to be solved by those skilled in the art.

Utility model content

The purpose of the utility model is to provide a control circuit of a CNC engraving machine and its I/O control board, which is used to reduce the influence of interference signals on the I/O control board.

In order to solve the above-mentioned technical problems, the utility model provides a control circuit of an I/O control board, including 3 sub-control circuits for respectively controlling the X-axis, the Y-axis and the Z-axis, and each sub-control circuit includes limit switches and An intermediate relay, the intermediate relay includes a coil and a normally open contact, the coil and the limit switch are arranged in the same power supply circuit provided by the power supply, when the limit switch is closed, the coil is energized, When the limit switch is turned off, the coil loses power, the first end of the normally open contact is connected to the I/O control board, and the second end of the normally open contact is connected to the power supply , the normally open contact connects the connection between the I/O control board and the power supply when the coil is energized, and the normally open contact disconnects the I/O when the coil is de-energized The connection of the control board to the power supply.

Preferably, the distance between the intermediate relay and the I/O control board is 10mm.

Preferably, the intermediate relay is a MY4N-J intermediate relay.

Preferably, the voltage of the power supply is 12V.

A kind of CNC engraving machine comprises main engine, machine tool, I/O control panel, also comprises described control circuit, and described control circuit is connected with described I/O control panel, and described I/O control panel is connected with all above host connection.

Preferably, the control line is a 25-pin parallel port control line.

The control circuit of the CNC engraving machine and its I/O control board provided by the utility model, by adding an intermediate relay on the basis of the existing control circuit, when operating the limit switch, the I/O control board does not directly receive the limit switch The action of the relay, but the energization or de-energization of the coil of the intermediate relay triggers the closing and opening of the normally open contact. Since the intermediate relay has less influence on the weak signal, the coil of the intermediate relay is not affected when there is a weak signal, so that the I/O control board can reduce the influence of the interference signal. In addition, since the I/O control board is directly controlled by the intermediate relay, the distance between the intermediate relay and the I/O control board can be set closer, and the distance between the limit switch and the intermediate relay is not limited. Therefore, The problem of long cable runs between the limit switch and the I/O control board can be avoided.

Description of drawings

In order to illustrate the embodiment of the utility model more clearly, the accompanying drawings that need to be used in the embodiment will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the utility model. For those skilled in the art Ordinary technicians can also obtain other drawings based on these drawings on the premise of not paying creative work.

Fig. 1 is the control circuit diagram of I/O control panel in the prior art;

Fig. 2 is the control circuit of a kind of I/O control panel provided by the utility model;

Fig. 3 is a mechanism diagram of a CNC engraving machine provided by the utility model.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. . Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

The core of the utility model is to provide a control circuit of a CNC engraving machine and its I/O control board.

In order to enable those skilled in the art to better understand the solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 2 is a control circuit of an I/O control board provided by the utility model. As shown in FIG. 2 , the control circuit 21 of the I/O control board 20 includes three sub-control circuits for controlling the X-axis, Y-axis and Z-axis respectively. For convenience of description, each sub-control circuit is labeled, and the control circuit 21 includes: a sub-control circuit corresponding to the X-axis, a sub-control circuit corresponding to the Y-axis, and a sub-control circuit corresponding to the Z-axis.

The structure of each sub-control circuit is the same, specifically:

The sub-control circuit corresponding to the X-axis includes a limit switch SQ1 and an intermediate relay. The intermediate relay includes a coil KA1 and a normally open contact K1. The coil KA1 and the limit switch SQ1 are set in the same power supply circuit provided by the power supply. The limit switch SQ1 is in When closed, the coil KA1 is energized, when the limit switch SQ1 is disconnected, the coil KA1 is de-energized, the first end of the normally open contact K1 is connected to the I/O control board 20, and the second end of the normally open contact K1 is connected to the power supply Connection, the normally open contact K1 connects the connection between the I/O control board 20 and the power supply when the coil KA1 is energized, and the normally open contact K1 disconnects the connection between the I/O control board 20 and the power supply when the coil KA1 is de-energized.

The sub-control circuit corresponding to the Y axis includes a limit switch SQ2 and an intermediate relay. The intermediate relay includes a coil KA2 and a normally open contact K2. The coil KA2 and the limit switch SQ2 are set in the same power supply circuit provided by the power supply. The limit switch SQ2 is in When closed, the coil KA2 is energized, when the limit switch SQ2 is disconnected, the coil KA2 is de-energized, the first end of the normally open contact K2 is connected to the I/O control board 20, and the second end of the normally open contact K2 is connected to the power supply Connection, the normally open contact K2 connects the connection between the I/O control board 20 and the power supply when the coil KA2 is energized, and the normally open contact K2 disconnects the connection between the I/O control board 20 and the power supply when the coil KA2 is de-energized.

The sub-control circuit corresponding to the Z axis includes a limit switch SQ3 and an intermediate relay. The intermediate relay includes a coil KA3 and a normally open contact K3. The coil KA3 and the limit switch SQ3 are set in the same power supply circuit provided by the power supply. The limit switch SQ3 is in When closed, the coil KA3 is energized, and when the limit switch SQ3 is disconnected, the coil KA3 is de-energized, the first end of the normally open contact K3 is connected to the I/O control board 20, and the second end of the normally open contact K3 is connected to the power supply Connection, the normally open contact K3 connects the connection between the I/O control board 20 and the power supply when the coil KA3 is energized, and the normally open contact K3 disconnects the connection between the I/O control board 20 and the power supply when the coil KA3 is de-energized.

In specific implementation, each limit switch is used independently of each other. If want to connect the connection of I/O control board 20 and power supply, then realize by closing limit switch SQ1, limit switch SQ2 or limit switch SQ3; If want to disconnect the connection of I/O control board 20 and power supply, then by disconnecting The limit switch SQ1, the limit switch SQ2 or the limit switch SQ3 is realized.

When the limit switch SQ1 is closed, the coil KA1 is energized, so that the corresponding normally open contact K1 is closed, so that the I/O control board 20 is connected to the power supply. Similarly, the limit switch SQ2 is the same as the limit switch SQ3. Let me repeat.

When the limit switch SQ1 is turned off, the coil KA1 loses power, so that the corresponding normally open contact K1 is disconnected, so that the I/O control board 20 is disconnected from the power supply. Similarly, it is the same for the limit switch SQ2 and the limit switch SQ3 ,No longer.

In the control circuit provided by this embodiment, by adding an intermediate relay on the basis of the existing control circuit, when operating the limit switch, the I/O control board does not directly receive the action of the limit switch, but receives the action of the coil of the intermediate relay. Power or loss of power triggers the closing and opening of the normally open contacts. Since the intermediate relay has less influence on the weak signal, the coil of the intermediate relay is not affected when there is a weak signal, so that the I/O control board can reduce the influence of the interference signal. In addition, since the I/O control board is directly controlled by the intermediate relay, the distance between the intermediate relay and the I/O control board can be set closer, and the distance between the limit switch and the intermediate relay is not limited. Therefore, The problem of long cable runs between the limit switch and the I/O control board can be avoided.

Based on the above embodiments, as a preferred implementation manner, the distance between the intermediate relay and the I/O control board is 10 mm. It can be understood that the closer the distance between the intermediate relay and the I/O control board 20, the better the effect, but the greater the difficulty in setting up the circuit, the distance between the two in this embodiment is 10mm is only a specific implementation The method does not mean that it can only be 10mm. Considering the cost and mutual cooperation, the preferred intermediate relay is MY4N-J intermediate relay. It can be understood that the model of the intermediate relay can be selected according to the actual application environment, and this is only a specific application scenario.

Since normally, the voltage of the power supply used by the I/O control board 20 is 12V, in order to reduce the number of hardware devices, the same power supply as that of the I/O control board 20 is selected in this embodiment. It is understandable that due to the different types of intermediate relays, the power specifications used are also different, and the two need to be used together.

Fig. 3 is a mechanism diagram of a CNC engraving machine provided by the utility model. As shown in Figure 3, CNC engraving machine comprises main frame 30, machine tool 31, I/O control panel 20, also comprises the control circuit 21 described in above-mentioned each embodiment, and control circuit 21 is connected with I/O control panel 20, I/O O control board 20 is connected with main frame by control line.

For the implementation of other parts of the CNC engraving machine in this embodiment, reference may be made to the prior art, and for the specific implementation of the control circuit 21 , please refer to the descriptions of the above embodiments, which will not be repeated here.

For the CNC engraving machine provided in this embodiment, the control circuit of the control circuit adds an intermediate relay on the basis of the existing control circuit. When operating the limit switch, the I/O control board does not directly receive the action of the limit switch, but is controlled by the intermediate relay. The energization or de-energization of the coil triggers the closing and opening of the normally open contacts. Since the intermediate relay has less influence on the weak signal, the coil of the intermediate relay is not affected when there is a weak signal, so that the I/O control board can reduce the influence of the interference signal. In addition, since the I/O control board is directly controlled by the intermediate relay, the distance between the intermediate relay and the I/O control board can be set closer, and the distance between the limit switch and the intermediate relay is not limited. Therefore, The problem of long cable runs between the limit switch and the I/O control board can be avoided.

As a preferred implementation manner, the control line in this embodiment is a 25-pin parallel port control line.

The CNC engraving machine and the control circuit of the I/O control board provided by the utility model have been introduced in detail above. Each embodiment in the description is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related part, please refer to the description of the method part. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (6)

1. a control circuit for I/O panel, including 3 groups of sub-control circuits controlling X-axis, Y-axis and Z axis respectively, its feature Being, each described sub-control circuit all includes that limit switch and auxiliary reclay, described auxiliary reclay include coil and normally opened Contact, described coil and described limit switch are arranged in the same current supply circuit being provided electric energy by power supply, and the described limit is opened Close Guan Bi time, described coil obtains electric, described limit switch disconnect time, described coil losing electricity, the first of described normally opened contact End is connected with described I/O panel, and the second end of described normally opened contact is connected with described power supply, and described normally opened contact is at described line Connecting the connection of described I/O panel and described power supply when enclosing electric, described normally opened contact disconnects institute when described coil losing electricity State the connection of I/O panel and described power supply.

Control circuit the most according to claim 1, it is characterised in that described auxiliary reclay is away from described I/O panel Distance is 10mm.

Control circuit the most according to claim 1 and 2, it is characterised in that described auxiliary reclay is to continue in the middle of MY4N-J Electrical equipment.

Control circuit the most according to claim 1, it is characterised in that the voltage of described power supply is 12V.

5. a CNC engraving machine includes main frame, lathe, I/O panel, it is characterised in that also include that claim 1-4 is any one Control circuit described in Xiang, described control circuit is connected with described I/O panel, and described I/O panel passes through control line and institute State main frame to connect.

CNC engraving machine the most according to claim 5, it is characterised in that described control line is 25 pin parallel port control lines.