KR950012966B1 - Vibration frequency setting mechanism of an engraving device provided with air pen - Google Patents

Abstract

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Description

Frequency setting mechanism of engraving device with air pen

1 is a view showing the configuration of the frequency setting mechanism of the engraving device equipped with an air pen according to a preferred embodiment of the present invention,

2 is a diagram showing the configuration requirements of FIG. 1, the configuration of the output circuit,

3 is a view showing a configuration of a conventional engraving device equipped with an air pen,

4 is a graph showing the relationship between the frequency and the air pressure.

* Explanation of symbols for main parts of the drawings

1: pressure regulator 2: adjustment terminal

3: frequency detector 4: counter

5: frequency setting circuit 6: comparator

7: Output circuit 11, 11A, 11B: Air pen

12 holder 13 pressure regulator

14: air storage tank 21: pulse signal

22: frequency 71: CPU

72: D / A Converter

The present invention relates to an engraving device equipped with an air pen having a frequency that can be set to a predetermined value by the frequency adjusting means.

The configuration of a conventional apparatus equipped with an air pen will be described with reference to FIGS. 3 and 4.

An engraving device equipped with an air pen is described in Japanese Patent Laid-Open No. 63-69700 (US Application No. 07/411577).

Conventional engraving device has a holder 12 for holding the air pen 11, and the air pen 11 and to move the air pen 11 so that the air pen 11 can carve the surface of the workpiece The air cylinder which is locked and connected to the holder 12 and is equipped with a pressure rod, and the air cylinder 11 receives air pressure via the pressure rod while the air pen 11 is in contact with the surface of the workpiece. The air pressure is supplied to the air cylinder so that the air pressure can be supplied to the air cylinder, and the pressure regulator 13 connected to the air storage tank 14 and the pressure regulator 13 when the air pen 11 is moved corresponding to the surface of the work pieces The pressure input through the rod is configured to be constantly adjusted.

According to the prior art engraving apparatus, since the air pen can be vibrated by simply adjusting the pressure using the pressure regulator 13, it is always necessary to pay attention to the quality change of the pen.

Quality change is defined as follows.

(a) The relationship between the frequency of the air pen and the air pressure is changed by each air pen.

For example, even if the air pen is operated under the same pressure, the frequency of the air pen 11A is larger than that of the air pen 11B as shown in FIG.

(b) The relationship between frequency and air pressure is changed by successive changes in each airpen.

As described in (a) and (b) above, it was necessary to adjust the air pressure to an optimum value every time the air pen was replaced with another air pen based on the cause of the quality change.

An object of the present invention is to set the frequency of the air pen to an optimum value, the piece equipped with the air pen which can make it unnecessary to adjust the change in the relationship between the frequency and the air pressure resulting from the continuous change and to replace the air pen It is to provide a frequency setting mechanism of the device.

In order to achieve the above object of the present invention, the frequency setting mechanism of the engraving device equipped with an air pen is composed of an air pen and a holder for holding the air pen, the frequency of the air pen is compressed air supplied with the holder A engraving device that changes according to the apparatus, a frequency detector attached to the holder to detect the frequency of the air pen and provide a pulse signal corresponding to the frequency, a counter for counting the pulse signal, and a signal supplied from the output circuit. A pressure regulator equipped with an adjustment terminal to increase or decrease the pressure of the compressed air, a frequency setting circuit for setting the frequency of the air pen, a frequency and a counter output, and a counter output greater than the frequency. 'And the output of the counter is smaller than the frequency, the comparator supplying the logic "0" and the output of the comparator The logic "1" reduces the analog output at a given stage, and if the output of the comparator is a logic "0", the analog output of the output circuit is increased by supplying compressed air from the pressure regulator to the holder. It is composed of an output circuit for supplying to the adjustment terminal of the pressure regulator.

The above and other objects, features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

EXAMPLE

The frequency adjusting mechanism of the engraving apparatus equipped with the air pen according to the preferred embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The frequency setting mechanism of the air pen-mounted engraving device is composed of an air pen 11 and a holder 12 for holding the air pen 11, and the frequency of the air pen 11 is the holder 12. A engraving device that changes in accordance with the supplied compressed air, a frequency detector 3 attached to the holder 12 to detect the frequency of the air pen 11 and provide a pulse signal 21 corresponding to the frequency; A counter 4 for counting the pulse signal 21 and a pressure regulator 1 provided with an adjusting terminal 2 for increasing or decreasing the pressure of the compressed air in response to a signal applied from the output circuit 7; And the frequency setting circuit 5 for setting the frequency 22 of the air pen 11, the outputs of the frequency 22 and the counter 4, and the output of the counter 4 is higher than the frequency 22. A comparator 6 for supplying a logic "1", and a comparator 6 for supplying a logic "0" if the output of the counter 4 is less than the frequency 22, if larger. By storing the output and decreasing the analog output at a given stage if the output of the comparator 6 is logic "1", and increasing the analog output at a given stage if the output of the comparator 6 is logic "0", The output of the analog circuit 7 is supplied to the adjusting terminal 2 of the pressure regulator 1 so that the compressed air from the pressure regulator 1 is supplied to the holder 12.

Hereinafter, the configuration of the frequency setting mechanism of the engraving apparatus equipped with the air pen will be described in detail.

The pressure regulator 1 increases or decreases the pressure of the compressed air in response to the amount of the signal input to the air conditioning terminal 2, and the frequency detector 3 detects the frequency of the air pen 11 and the frequency thereof. The pulse signal 21 corresponding to this is supplied.

A piezoelectric sensor is used as the frequency detector 3.

The counter 4 detects the pulse signal 21 provided by the frequency detector 3.

The frequency setting circuit 5 uses the digital switch, for example, and sets the frequency 22 of the air pen 11.

The comparator 6 houses the output of the counter 4 and the frequency 22, and if the output of the counter 4 is greater than the frequency 22, supplies a logic "1" and the output of the counter 4 is the frequency. If less than (22), the logic "0" is supplied.

The output circuit 7 houses the output of the comparator 6, and if the output of the comparator 6 is a logic "1", then reduces the analog output in a given step, and if the output of the comparator 6 is a logic "0" , Increase the analog output at a given stage.

The output circuit 7 is composed of a CPU 71 and a D / A converter 72, as shown in FIG.

The CPU 71 provides digital data which is increased or decreased at a given step in correspondence with the output logic state of the comparator 6. The digital data provided by the CPU 71 is converted into an analog signal by the D / A converter 72.

Therefore, the pressure regulator 1 can receive the analog output signal from the D / A converter 72 via the adjusting terminal 2, which is increased or decreased at a given stage in correspondence with the output logic state of the comparator 6. .

As a result, the air pen 11 receives the given frequency equal to the frequency set by the frequency setting circuit 5 from the pressure regulator 1.

In the present invention, the frequency of the air pen can be kept constant at the frequency set by the frequency setting circuit 5.

Therefore, it has the following advantages.

(a) Eliminate adjustments to the airpen due to manufacturing changes.

(b) Eliminate adjustments to the airpen due to continuous changes.

(c) It is possible to diagnose the operation of the engraving device by monitoring the count value of the frequency of the airpen for a certain period of time.

In the present invention, the content of the present invention has been described in a specific form in a preferred form, but many modifications and variations are possible without departing from the scope of the present invention.

Claims (2)

An air pen 11 and a holder 12 for holding the air pen 11, the frequency of which is changed according to the compressed air supplied to the holder 12; A frequency detector 3 attached to the holder 12 for detecting the frequency of the air pen 11 and providing a pulse signal 21 corresponding to the frequency; A counter 4 for counting the pulse signal 21; A pressure regulator 1 provided with an adjustment terminal 2 for increasing or decreasing the pressure of the compressed air in response to a signal applied from the output circuit 7; A frequency setting circuit 5 for setting the frequency 22 of the air pen 11; The frequency 22 and the output of the counter 4 are stored, and if the output of the counter 4 is greater than the frequency 22, a logic "1" is supplied, and if the output of the counter 4 is less than the frequency 22 If the comparator 6 supplies a logic "0" and the output of the comparator 6 is received and the output of the comparator 6 is a logic "1", the analog output is decreased in a given step, and the output of the comparator 6 is A logic " 0 " constitutes an output circuit 7 which increments the analog output in a given step; Frequency of the engraving device equipped with the air pen, in which the analog output of the output circuit 7 is supplied to the adjusting terminal 2 of the pressure regulator 1, and the compressed air from the pressure regulator 1 is supplied to the holder 12. Setting mechanism. 2. The output circuit (7) according to claim 1, wherein the output circuit (7) consists of a CPU (71) and a D / A converter (72), wherein the CPU (71) is increased or decreased in a given step in correspondence with a logic relative provided by the comparator (6). A frequency setting mechanism of an engraving device equipped with an air pen which generates digital data and the D / A converter 72 converts the digital data provided by the CPU 71 into an analog signal.

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