JPH1128586A - Laser beam marking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily set optimum printing conditions. SOLUTION: A CPU 21 is inputted with the information concerning a mark/ arrangement to be printed, a laser beam output and a scanning speed from a display/input device 23 and inputs or sets a between-dots distance. The CPU 21 operates a Q switch frequency based on the inputted scanning speed and between-dots distance. The information concerning a mark and arrangement to be printed and a scanning speed are given to a galvanomirror control part 22, a ramp current control signal on the basis of a laser beam output is given to a ramp power source 20 and the Q switch frequency is given to a Q switch control part 25, the galvanomirror, thus the ramp power source and a Q switch 15 are controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser marking device for printing a mark such as a character, a symbol or a figure on an object.

[0002]

2. Description of the Related Art In a laser marking apparatus, a mark such as a character, a symbol, and a figure is printed on an object by scanning a surface of the object with laser light emitted from a laser oscillator. The laser oscillator has a Q switch in order to obtain a high and short laser output by pulsating the laser light by Q switching. The Q-switching means that pumping is performed in a state where the loss of the optical resonator is increased, energy is accumulated in an excitation level, the loss is reduced at an appropriate time, and a laser action is performed.
Thus, various marks can be printed on the target object by the energy of the pulsed laser light. When the Q switch does not operate, the laser beam oscillates continuously.

[0003]

When using a laser marking device, it is necessary to specify at least three values of a scanning speed of a laser beam, a Q switch frequency of a Q switch, and a laser output (laser power) as printing conditions. There is.

Since the optimum printing conditions vary depending on the material of the object, the type and size of the mark to be printed, etc., it is very difficult for an operator to adjust these three values to set the optimum printing conditions. It is.

It is an object of the present invention to provide a laser marking device which can easily set an optimum printing condition.

[0006]

Means for Solving the Problems and Effects of the Invention

(1) First invention A laser marking device according to a first invention is a laser marking device that irradiates a laser beam onto a surface of an object to print a mark, has a Q switch, and emits a laser beam. A laser oscillator, scanning means for scanning the surface of the object with laser light emitted from the laser oscillator, input means for inputting printing information on a mark to be printed, laser output and scanning speed of the laser light, and input means Calculating means for calculating the frequency of the Q switch based on the scanning speed of the laser light input by the printer, print information input by the input means, the laser output and the scanning speed of the laser light, and the Q switch calculated by the calculating means Control means for controlling the laser oscillator and the scanning means based on the frequency of the laser oscillator.

Assuming that the interval between dots formed on the surface of an object by laser light is constant, the scanning speed of laser light and Q
The frequencies of the switches are in a proportional relationship. Therefore, in the laser marking device according to the present invention, the print information,
When the laser output and the scanning speed of the laser beam are input,
The frequency of the Q switch is calculated based on the scanning speed of the laser light. The scanning means is controlled based on the input printing information and the scanning speed of the laser light, and the laser oscillator is controlled based on the input laser output and the calculated frequency of the Q switch.

Therefore, the printing conditions to be specified are the laser output and the scanning speed of the laser beam, and it is not necessary to specify the frequency of the Q switch. As a result, it is possible to easily set optimal printing conditions.

(2) Second Invention A laser marking device according to a second invention is a laser marking device that irradiates a laser beam onto a surface of an object to print a mark, and has a Q switch, A laser oscillator that emits light, a scanning unit that scans the surface of the object with laser light emitted from the laser oscillator, an input unit that inputs print information on a mark to be printed, a laser output, and a frequency of a Q switch, Calculating means for calculating the scanning speed of the laser beam based on the frequency of the Q-switch input by the input means; print information input by the input means; the laser output and the frequency of the Q-switch; and the laser calculated by the calculating means Control means for controlling the laser oscillator and the scanning means based on the scanning speed of the light.

Assuming that the interval between dots formed on the surface of the object by laser light is constant, the scanning speed of laser light and Q
The frequencies of the switches are in a proportional relationship. Therefore, in the laser marking device according to the present invention, the print information,
When the laser output and the frequency of the Q switch are input,
The scanning speed of the laser light is calculated based on the frequency of the Q switch. The scanning unit is controlled based on the input printing information and the calculated scanning speed of the laser beam,
The laser oscillator is controlled based on the input laser output and the frequency of the Q switch.

Therefore, the printing conditions to be specified are the laser output and the frequency of the Q switch, and it is not necessary to specify the scanning speed of the laser beam. As a result, it is possible to easily set optimal printing conditions.

(3) Third invention A laser marking device according to a third invention is a laser marking device that irradiates a laser beam onto a surface of an object to print a mark, and has a Q switch, A laser oscillator that emits light, a scanning unit that scans the surface of an object with laser light emitted from the laser oscillator, and print information on a mark to be printed, an allowable print time, a laser output, and a frequency of a Q switch are input. Input means, calculating means for calculating the scanning speed of the laser beam based on the print information input by the input means and the permissible print time, print information input by the input means, laser output and the frequency of the Q switch, and calculation Control means for controlling the laser oscillator and the scanning means based on the scanning speed of the laser beam calculated by the means.

Given the allowable printing time, the scanning speed of the laser beam required to print the mark within the allowable printing time is determined according to the type and arrangement of the mark to be printed. Therefore, in the laser marking device according to the present invention, when the print information, the allowable print time, the laser output, and the frequency of the Q switch are input, the scanning speed of the laser beam is calculated based on the print information and the allowable print time. . The scanning means is controlled based on the input printing information and the calculated scanning speed of the laser light, and the laser oscillator is controlled based on the input laser output and the frequency of the Q switch.

Therefore, the printing conditions to be specified are the allowable printing time, the laser output and the frequency of the Q switch.
It is not necessary to specify the scanning speed of the laser beam. As a result, it is possible to easily set optimal printing conditions.

(4) Fourth Invention A laser marking device according to a fourth invention is a laser marking device that irradiates a laser beam onto a surface of an object to print a mark, and has a Q switch, A laser oscillator that emits light, a scanning unit that scans the surface of the object with laser light emitted from the laser oscillator, an input unit that inputs print information on a mark to be printed, an allowable print time, and a laser output; Calculating means for calculating the scanning speed of the laser beam based on the printing information and the allowable printing time input by the means, and calculating the frequency of the Q switch based on the calculated scanning speed of the laser beam; Based on the print information and the laser output, and the scanning speed of the laser beam and the frequency of the Q switch calculated by the calculation means. Control means for controlling the oscillator and the scanning means.

Given the allowable printing time, the scanning speed of the laser beam required to print the mark within the allowable printing time is determined according to the type and arrangement of the mark to be printed. Further, assuming that the interval between dots formed on the surface of the object by the laser light is constant, the scanning speed of the laser light is proportional to the frequency of the Q switch. Therefore, in the laser marking device according to the present invention, when the print information, the allowable print time and the laser output are input, the scanning speed of the laser beam is calculated based on the print information and the allowable print time, and the calculated laser beam is output. The frequency of the Q switch is calculated based on the light scanning speed. The scanning means is controlled based on the input printing information and the calculated scanning speed of the laser light, and the laser oscillator is controlled based on the input laser output and the calculated frequency of the Q switch.

Therefore, the printing conditions to be specified are the allowable printing time and the laser output, and it is not necessary to specify the scanning speed of the laser beam and the frequency of the Q switch. As a result, it is possible to easily set optimal printing conditions.

(5) Fifth Invention The laser marking device according to the fifth invention comprises first to fourth laser marking devices.
In the configuration of the laser marking device according to the invention, the input unit further inputs a dot interval formed on the surface of the target object by the laser light, and the calculating unit further calculates the dot interval based on the dot interval input by the input unit. To calculate the frequency of the Q switch or the scanning speed of the laser beam.

In this case, when the dot interval is input,
Since the frequency of the Q switch or the scanning speed of the laser beam is calculated based on the dot interval, printing can be performed at an arbitrary dot interval.

(6) Sixth Invention A laser marking device according to a sixth invention is a laser marking device that irradiates a laser beam onto the surface of an object to print a mark, and has a Q switch, Laser oscillator for emitting light, scanning means for scanning the surface of the object with laser light emitted from the laser oscillator, and storage means for storing the relationship between the scanning speed of the laser light and the laser output corresponding to a plurality of print samples Input means for inputting print information relating to a mark to be printed, and designation information for designating one of a plurality of print samples, and scanning of a corresponding laser beam from the storage means based on the designation information input by the input means Extraction means for extracting speed and laser output;
Calculating means for calculating the frequency of the Q switch based on the scanning speed of the laser light extracted by the extracting means; print information input by the input means; scanning speed and laser output of the laser light extracted by the extracting means; And a control means for controlling the laser oscillator and the scanning means based on the frequency of the Q switch calculated by the calculation means.

In the laser marking device according to the present invention, the relationship between the scanning speed of the laser beam and the laser output corresponding to a plurality of print samples is stored in the storage means in advance. Therefore, when the print information and the designation information for designating one of the print samples are input, the scanning speed of the laser beam and the laser output are extracted based on the designation information. Also,
Assuming that the interval between dots formed on the surface of the object by the laser light is constant, the scanning speed of the laser light and the frequency of the Q switch are in a proportional relationship. Therefore, the frequency of the Q switch is calculated based on the scanning speed of the extracted laser light. The scanning means is controlled based on the input printing information and the scanning speed of the extracted laser light, and the laser oscillator is controlled based on the extracted laser output and the calculated frequency of the Q switch.

Therefore, the printing condition to be designated becomes the designation information, and it is not necessary to designate the scanning speed of the laser beam, the laser output and the frequency of the Q switch. As a result, it is possible to easily set optimal printing conditions.

(7) Seventh Invention A laser marking device according to a seventh invention is a laser marking device that irradiates a laser beam onto a surface of an object to print a mark, and has a Q switch, A laser oscillator that emits light, a scanning unit that scans the surface of the object with laser light emitted from the laser oscillator, and a storage unit that stores a relationship between a frequency and a laser output of a Q switch corresponding to a plurality of print samples. Input means for inputting print information relating to a mark to be printed, and designation information for designating any of a plurality of print samples, and a frequency and a frequency of a corresponding Q switch from a storage means based on the designation information inputted by the input means. Extraction means for extracting a laser output,
Calculating means for calculating the scanning speed of the laser beam based on the frequency of the Q switch extracted by the extracting means; print information input by the input means; frequency and laser output of the Q switch extracted by the extracting means; Control means for controlling the laser oscillator and the scanning means based on the scanning speed of the laser beam calculated by the means.

In the laser marking device according to the present invention, the relationship between the frequency of the Q switch and the laser output corresponding to a plurality of print samples is stored in the storage means in advance. Therefore, when the print information and the designation information for designating any one of the plurality of print samples are input, the frequency and the laser output of the Q switch are extracted based on the designation information.
Further, assuming that the interval between dots formed on the surface of the object by the laser light is constant, the scanning speed of the laser light is proportional to the frequency of the Q switch. Therefore, the scanning speed of the laser beam is calculated based on the extracted frequency of the Q switch. The scanning unit is controlled based on the input printing information and the calculated scanning speed of the laser beam,
The laser oscillator is controlled based on the extracted Q-switch frequency and laser output.

Therefore, the printing condition to be designated is designated information, and it is not necessary to designate the scanning speed of the laser beam, the laser output and the frequency of the Q switch. As a result, it is possible to easily set optimal printing conditions.

(8) Eighth Invention A laser marking device according to an eighth invention is a laser marking device that irradiates a laser beam onto a surface of an object to print a mark, and has a Q switch, A laser oscillator that emits light, a scanning unit that scans the surface of the object with laser light emitted from the laser oscillator, and a relationship between a print density corresponding to a plurality of print samples, a scanning speed of the laser light, and a laser output. Storage means for storing, input means for inputting print information relating to a mark to be printed, allowable print time, and specification information for specifying one of a plurality of print samples, and storage based on the specification information input by the input means The scanning speed and laser output of the corresponding laser beam are extracted from the means, and the printing sample corresponding to the printing density equal to the printing sample specified by the specification information is corresponded. Extracting means for extracting the scanning speed and laser output of the laser light, and selecting means for selecting the slowest scanning speed of the laser light satisfying the permissible printing time and the corresponding laser output among the scanning speeds of the laser light extracted by the extracting means Calculating means for calculating the frequency of the Q switch based on the scanning speed of the laser light selected by the selecting means; print information input by the input means; scanning speed and laser output of the laser light selected by the selecting means And a control means for controlling the laser oscillator and the scanning means based on the frequency of the Q switch calculated by the calculation means.

In the laser marking device according to the present invention, the relationship among the print density, the scanning speed of the laser beam, and the laser output corresponding to a plurality of print samples is stored in the storage means in advance. Therefore, when the designated information for designating the print information, the allowable print time, and any one of the plurality of print samples is input, the scanning speed and the laser beam corresponding to the print sample having the same print density based on the designated information are inputted. The output is extracted.

On the other hand, when the allowable printing time is given, the scanning speed of the laser beam required to print the mark within the allowable printing time is determined according to the type and arrangement of the mark to be printed. Further, assuming that the interval between dots formed on the surface of the object by the laser light is constant, the scanning speed of the laser light is proportional to the frequency of the Q switch.

Accordingly, the scanning speed of the slowest laser light satisfying the permissible printing time and the corresponding laser output among the scanning speeds of the extracted laser light are selected, and the Q switch of the Q switch is selected based on the selected scanning speed of the laser light. The frequency is calculated. The scanning unit is controlled based on the input printing information and the scanning speed of the selected laser beam,
The laser oscillator is controlled based on the selected laser output and the calculated frequency of the Q switch.

Therefore, the printing conditions to be specified are the allowable printing time and the specifying information, and it is not necessary to specify the scanning speed of the laser beam, the laser output, and the frequency of the Q switch. As a result, it is possible to easily set optimal printing conditions.

In this case, since the slowest scanning speed of the laser beam within the range satisfying the allowable printing time is selected, clear printing can be performed.

(9) Ninth Invention In a laser marking device according to a ninth invention, in the configuration of the laser marking device according to the eighth invention, the selection means includes a predetermined value among the laser outputs extracted by the extraction means. The above laser output and the corresponding scanning speed of the laser light are detected, and the scanning speed of the slowest laser light and the corresponding laser output among the detected scanning speeds of the laser light are selected.

Thus, when the density is higher than a certain density, the density is adjusted by the laser output. When the density is lower than the certain density, the density is adjusted by the scanning speed of the laser beam and the frequency of the Q switch.

In this case, since the slowest scanning speed of the laser beam is selected within a range that satisfies the allowable printing time and the laser output that is equal to or longer than the predetermined value, clear printing is possible.

(10) Tenth Invention A laser marking device according to a tenth invention is a laser marking device that irradiates a laser beam onto the surface of an object to print a mark, and has a Q switch, A laser oscillator that emits light, a scanning unit that scans the surface of an object with laser light emitted from the laser oscillator, and stores a relationship between a print density corresponding to a plurality of print samples, a Q switch frequency, and a laser output. Storage means for inputting designation information for designating print information relating to a mark to be printed, an allowable print time and any of a plurality of print samples, and storage means based on the designation information input by the input means. Extracts the frequency and laser output of the corresponding Q switch, and supports a print sample with the same print density as the print sample specified by the specification information Extracting means for extracting the frequency and laser output of the Q switch to be performed, and selecting means for selecting the lowest Q switch frequency and the corresponding laser output satisfying the allowable printing time among the Q switch frequencies extracted by the extracting means; Calculating means for calculating the scanning speed of the laser beam based on the frequency of the Q switch selected by the selecting means; print information input by the input means; frequency and laser output of the Q switch selected by the selecting means; Control means for controlling the laser oscillator and the scanning means based on the scanning speed of the laser beam calculated by the means.

In the laser marking device according to the present invention, the relationship among the print density, the frequency of the Q switch, and the laser output corresponding to a plurality of print samples is stored in the storage means in advance. Therefore, when the print information, the allowable print time, and the designation information for designating any one of the plurality of print samples are input, the frequency and the laser output of the Q switch corresponding to the print sample having the same print density based on the designation information are input. Is extracted.

On the other hand, when the allowable printing time is given, the scanning speed of the laser beam required to print the mark within the allowable printing time is determined according to the type and arrangement of the mark to be printed. Further, assuming that the interval between dots formed on the surface of the object by the laser light is constant, the scanning speed of the laser light is proportional to the frequency of the Q switch.

Therefore, among the extracted Q switch frequencies, the lowest Q switch frequency that satisfies the permissible printing time and the corresponding laser output are selected, and the scanning speed of the laser beam is reduced based on the selected Q switch frequency. Is calculated. The scanning unit is controlled based on the input printing information and the calculated scanning speed of the laser beam,
The laser oscillator is controlled based on the selected laser output and the frequency of the Q switch.

Accordingly, the printing conditions to be specified are the allowable printing time and the specifying information, and it is not necessary to specify the scanning speed of the laser beam, the laser output and the frequency of the Q switch. As a result, it is possible to easily set optimal printing conditions.

In this case, since the lowest frequency of the Q switch is selected within a range satisfying the allowable printing time, clear printing can be performed.

(11) Eleventh Invention In the laser marking device according to the eleventh invention, in the configuration of the laser marking device according to the tenth invention, the selection means includes a predetermined value among the laser outputs extracted by the extraction means. The above laser output and the corresponding Q switch frequency are detected, and the lowest Q switch frequency and the corresponding laser output among the detected Q switch frequencies are selected.

Thus, when the density is higher than a certain density, the density is adjusted by the laser output. When the density is lower than the certain density, the density is adjusted by the scanning speed of the laser beam and the frequency of the Q switch.

In this case, since the lowest frequency of the Q switch is selected within a range that satisfies the allowable printing time and the laser output that is equal to or longer than a predetermined value, clear printing is possible.

(12) Twelfth Invention A laser marking device according to a twelfth invention is a laser marking device that irradiates a laser beam onto the surface of an object to print a mark, and has a Q switch, A laser oscillator that emits light, a scanning unit that scans the surface of the object with the laser light emitted from the laser oscillator, and a relationship between the scanning speed of the laser light and the frequency of the Q switch corresponding to the degree of foam printing. Storage means, input means for inputting printing information on a mark to be printed, degree of foaming and laser output, and a scanning speed and a Q switch of a corresponding laser beam from the storing means based on the degree of foaming input by the input means; Extracting means for extracting the frequency of the print information and laser output inputted by the input means, and extracted by the extracting means Control means for controlling the laser oscillator and the scanning means based on the scanning speed of the laser light and the frequency of the Q switch.

In the laser marking device according to the present invention, the relationship between the scanning speed of the laser beam and the frequency of the Q switch corresponding to the degree of foam printing is stored in the storage means in advance. Therefore, when the print information, the degree of foaming, and the laser output are input, the scanning speed of the laser beam and the frequency of the Q switch are extracted based on the degree of foaming. The scanning means is controlled based on the input printing information and the scanning speed of the extracted laser beam, and the laser oscillator is controlled based on the input laser output and the extracted frequency of the Q switch.

Therefore, the printing conditions to be specified are the degree of foaming and the laser output, and it is not necessary to specify the scanning speed of the laser beam and the frequency of the Q switch. As a result, it is possible to easily set optimal printing conditions.

(13) Thirteenth Invention A laser marking device according to a thirteenth invention is a laser marking device for irradiating a surface of an object with a laser beam to print a mark, comprising a Q switch, A laser oscillator that emits light, a scanning unit that scans the surface of the object with the laser light emitted from the laser oscillator, and a relationship between the scanning speed of the laser light and the frequency of the Q switch corresponding to the degree of foam printing. Storage means, input information for inputting the printing information on the mark to be printed, the density of printing and the degree of foaming, setting means for setting a laser output based on the density of printing input by the input means,
Extracting means for extracting the corresponding scanning speed of the laser beam and the frequency of the Q switch from the storage means based on the degree of foaming input by the input means; printing information input by the input means; output,
And control means for controlling the laser oscillator and the scanning means based on the scanning speed of the laser beam extracted by the extracting means and the frequency of the Q switch.

In the laser marking device according to the present invention, the relationship between the scanning speed of the laser beam and the frequency of the Q switch corresponding to the degree of foam printing is stored in the storage means in advance. Further, the laser output and the print density have a certain relationship. Therefore, when the print information and the print density and the degree of foaming are input, the laser output is set based on the print density, and the scanning speed of the laser beam and the frequency of the Q switch are extracted based on the degree of foaming. You.
The scanning means is controlled based on the input printing information and the scanning speed of the extracted laser light, and the laser oscillator is controlled based on the set laser output and the extracted frequency of the Q switch.

Therefore, the printing conditions to be specified are the printing density and the degree of foaming, and the scanning speed of the laser light,
It is not necessary to specify the laser output and the frequency of the Q switch. As a result, it is possible to easily set optimal printing conditions.

[0050]

FIG. 1 is a schematic view of a laser marking apparatus according to an embodiment of the present invention.

In FIG. 1, a laser beam emitted from a YAG laser oscillator 1 is a pair of galvanomirrors 3a and 3a.
The light is reflected by b and radiated on the object 100 by the condenser lens 4. The control device 2 controls the YAG laser oscillator 1 and the pair of galvanometer mirrors 3a and 3b.

Each of the galvanometer mirrors 3 a and 3 b is configured such that a mirror 33 is attached to a rotation shaft 32 of a drive motor 31, and the mirror 33 rotates with the rotation of the rotation shaft 32. The laser beam is scanned in the main scanning direction X by one galvanometer mirror 3a, and the other galvanometer mirror 3b
Thereby, the laser light is scanned in the sub-scanning direction Y. Note that the main scanning direction X and the sub-scanning direction Y are directions orthogonal to each other. As a result, characters, symbols,
Marks such as figures are printed. The target object 100 is transported by the transport device 101 in a direction parallel to the main scanning direction X.

FIG. 2 is a block diagram showing a configuration of a main part of the laser marking device of FIG. In the YAG laser oscillator 1, YAG (Yttrium ·
YA consisting of rod-shaped crystals of aluminum and garnet
A G rod 11 and a lamp 12 for exciting the YAG rod 11 are built in. Both end surfaces of the YAG rod 11 are exposed to the outside from the storage case 10. Y
An output mirror 13 is arranged in front of one end face of the AG rod 11, and a total reflection mirror 14 is arranged behind the other end face of the YAG rod 11. In addition, YAG rod 1
A Q switch 15 is arranged between 1 and the total reflection mirror 14.

In the vicinity of the front end surface of the YAG rod 11, an infrared cut filter 16
And a light receiving element 17 such as a photodiode.

The control device 2 includes a lamp power supply 20, a CPU
(Central processing unit) 21, Galvano mirror control unit 2
2, including a display / input device 23, a memory 24 and a Q switch control unit 25.

The lamp power supply 20 is a YAG laser oscillator 1
To supply current to the lamps 12. The galvanomirror control unit 22 controls the drive motor 31 of the galvanomirrors 3a and 3b in FIG. The display / input device 23 gives various data and various commands input by the user to the CPU 21 and performs various displays based on the commands from the CPU 21. The Q switch controller 25 controls the Q switch 15 of the YAG laser oscillator 1.

The output signal of the light receiving element 17 is given to the CPU 21 via the amplifier 18. The CPU 21 supplies the lamp power supply 20 with a lamp-on signal ON for instructing lighting of the lamp 12 and a lamp current control signal CN for controlling a current (lamp current) supplied from the lamp power supply 20 to the lamp 12. In addition, the CPU 21 controls the galvanomirror controller 2
2. While giving instructions to the display / input device 23 and the Q switch control unit 25, various data input by the display / input device 23 are stored in the memory 24.

In this embodiment, the YAG laser oscillator 1 corresponds to a laser oscillator, the galvanometer mirrors 3a and 3b correspond to scanning means, and the display / input device 23 corresponds to input means. The CPU 21 constitutes a calculating unit, an extracting unit, and a selecting unit, and the CPU 21 and the galvanomirror control unit 22
And the Q switch control unit 25 constitute control means. Further, the memory 24 corresponds to a storage unit.

In the present embodiment, a YAG laser oscillator is used as the laser oscillator, but another laser oscillator having a Q switch may be used.

When the user instructs the lamp 12 to be turned on by the display / input device 23, the CPU 21
Is supplied with a lamp-on signal ON. As a result, current is supplied from the lamp power supply 20 to the lamp 12, and the lamp 12 is turned on.

When the lamp light is applied to the YAG rod 11, the YAG rod 11 is excited by light of a specific wavelength region in the lamp light, and stimulated emission light is generated. The stimulated emission light generated from the end face of the YAG rod 11 is
The laser beam is amplified by multiple reflection between the light and the total reflection mirror 14 and oscillates.
3 and is emitted.

At the time of pulse oscillation, the Q switch 15 performs pulse oscillation of the laser beam by Q switching, so that a laser output with a high and short time width can be obtained. When the Q switch 15 does not operate, the laser light oscillates continuously.

When the user instructs printing using the display / input device 23, the galvanomirror control unit 22 instructs the pair of galvanomirrors 3a and 3b in FIG.
Control. Thereby, the laser beam is scanned in the main scanning direction X and the sub-scanning direction Y, and a mark is printed on the object 100.

The YAG rod 11 of the YAG laser oscillator 1
The lamp light leaked from the vicinity of the end face to the outside of the storage case 10 is received by the light receiving element 17 through the infrared cut filter 16. The infrared cut filter 16 removes the influence of heat. The output signal of the light receiving element 17 is amplified by the amplifier 18 and given to the CPU 21 as a measured value of the light amount.

Next, a method of setting printing conditions in the laser marking device of this embodiment will be described. As the printing conditions, at least three values of the scanning speed of the laser beam by the galvanometer mirrors 3a and 3b (hereinafter abbreviated as scanning speed), the laser output of the YAG laser oscillator 1, and the Q switch frequency of the Q switch 25 are set.

FIG. 3 is a flowchart showing a first operation example of the laser marking device of this embodiment.

Assuming that the scanning speed is constant, the distance between the dots increases as the Q-switch frequency decreases, so that even when a straight line is printed, the dot line looks like a dotted line. This is because the period of the Q switch becomes longer,
If the scanning speed is reduced in proportion to the decrease in the Q switch frequency, the decrease in the Q switch frequency can be offset.

That is, assuming that the distance between dots is constant, the scanning speed and the Q switch frequency are in a proportional relationship. Therefore, if the distance between the dots is determined, the Q switch frequency can be calculated from the scanning speed.
The scanning speed can be calculated from the switch frequency.

The user designates information on the mark and arrangement to be printed by the display / input device 23, the laser output PL and the scanning speed VS. Here, the information about the mark to be printed and the arrangement include, for example, font (font), character height, width ratio, character inclination, printing direction, character thickness, line interval, character interval, line interval, and coordinates of the start point. And so on.

The CPU 21 inputs information on the mark to be printed and the arrangement from the display / input device 23 (step S1), inputs the laser output PL (step S2),
The scanning speed VS is input (step S3).

When the user specifies the inter-dot distance DD using the display / input device 23, the CPU 21 inputs the inter-dot distance DD from the display / input device 23, and the user sets the inter-dot distance DD. If not specified,
The inter-dot distance DD is set to a predetermined value (step S4).

Next, the CPU 21 calculates the frequency fs of the Q switch 15 (hereinafter referred to as the Q switch frequency) fs from the scanning speed VS and the inter-dot distance DD by the following equation (step S5).

Fs = (k · VS) / DD Here, k is a predetermined constant.

The CPU 21 supplies information on the mark and arrangement to be printed and the scanning speed VS to the galvanomirror control unit 22, supplies a lamp current control signal CN based on the laser output PL to the lamp power supply 20, and supplies a Q switch frequency f
By giving s to the Q switch control unit 25, the galvanomirrors 3a and 3b, the lamp power supply 20 and the Q switch 15 are controlled (step S6).

As described above, the user can set the optimum printing conditions only by specifying the laser output PL and the scanning speed VS without specifying the Q switch frequency fs.

If the user does not specify the inter-dot distance DD, the CPU 21 determines that, for example,
The inter-dot distance DD is automatically calculated so as to overlap each other by about%. On the other hand, when the user specifies the inter-dot distance DD arbitrarily, the interval between the dots is very wide, as in the case of dotted line printing, or the interval between the dots is very high, as in the case of foam printing, which will be described later. It is also possible to perform printing that is jammed.

FIG. 4 is a flowchart showing a second operation example of the laser marking device of this embodiment.

The user designates information on the mark and arrangement to be printed by the display / input device 23, the laser output PL and the Q switch frequency fs. Thereby, C
The PU 21 inputs information about the mark and arrangement to be printed from the display / input device 23 (Step S11), inputs the laser output PL (Step S12), and inputs the Q switch frequency fs (Step S13).

When the user specifies the inter-dot distance DD using the display / input device 23, the CPU 21 inputs the inter-dot distance DD from the display / input device 23, and the user sets the inter-dot distance DD. If not specified,
The inter-dot distance DD is set to a predetermined value (step S14).

Next, the CPU 21 sets the Q switch frequency f
The scanning speed VS is calculated from the following formula based on s and the distance DD between dots.
Is calculated (step S15).

VS = (fs · DD) / k where k is a predetermined constant.

The CPU 21 supplies information on the mark and arrangement to be printed and the scanning speed VS to the galvanomirror control section 22, supplies a lamp current control signal CN based on the laser output PL to the lamp power supply 20, and supplies a Q switch frequency f
By providing s to the Q switch control unit 25, the galvanomirrors 3a and 3b, the lamp power supply 20 and the Q switch 15 are controlled (step S16).

As described above, the user can set the optimum printing conditions only by specifying the Q switch frequency fs and the laser output PL without specifying the scanning speed VS.

FIG. 5 is a flowchart showing a third operation example of the laser marking device of this embodiment.

If the scanning speed is too high, the galvanomirror 3
The inertia of a and 3b cannot be ignored, and printing is disturbed. Further, when the Q switch frequency increases with an increase in the scanning speed, the laser output decreases. Therefore, it is desirable to set the scanning speed as low as possible. However, if the scanning speed is too low, printing cannot be completed within the takt time requested by the user. The tact time is an allowable value of the time required for printing, and corresponds to the allowable printing time.

Therefore, if the minimum scanning speed at which a mark to be printed can be printed within a range satisfying the tact time designated by the user is calculated, the sharpest printing can be automatically performed.

The user can input information on the mark and arrangement to be printed by the display / input device 23, the laser output PL,
The tact time TT and the Q switch frequency fs are specified. Accordingly, the CPU 21 inputs information on the mark to be printed and the arrangement from the display / input device 23 (step S21), and inputs the laser output PL (step S21).
22), and input the tact time TT (step S2)
3) Input the Q switch frequency fs (step S2)
4). Then, a calculation process of the scanning speed VS of FIG. 6 described later is performed (step S25).

The CPU 21 supplies information on the mark and arrangement to be printed and the scanning speed VS to the galvano mirror control unit 25, supplies a lamp current control signal CN based on the laser output PL to the lamp power supply 20, and supplies the Q switch frequency f
By giving s to the Q switch control unit 25, the galvanomirrors 3a and 3b, the lamp power supply 20 and the Q switch 15 are controlled (step S26).

As described above, the user can set the optimum printing conditions only by specifying the laser output PL, the tact time TT, and the Q switch frequency fs without specifying the scanning speed VS.

FIG. 6 is a flowchart showing the calculation process of the scanning speed. First, the CPU 21 converts the input information about the mark and the arrangement into print information (step S101). Then, the laser beam is not emitted from the YAG laser oscillator 1 based on the print information, and the galvanomirror 3 is turned off.
a, 3b to perform printing at the maximum speed (step S
102).

The printing distance D is calculated based on the time required for printing.
L is calculated (step S103). Further, based on the printing distance DL and the tact time TT, the tact time T
The minimum scanning speed at which the mark specified in T can be printed is calculated as the scanning speed VS. Thereby,
Clear printing can be automatically performed.

FIG. 7 is a flowchart showing a fourth operation example of the laser marking device of this embodiment.

The user designates information on the mark and arrangement to be printed by the display / input device 23, the laser output PL and the tact time TT. Thereby, CPU
21 inputs information on marks and arrangement to be printed from the display / input device 23 (step S31), inputs a laser output PL (step S32), and sets a tact time T.
T is input (step S33).

When the user specifies the inter-dot distance DD using the display / input device 23, the CPU 21 inputs the inter-dot distance DD from the display / input device 23, and the user sets the inter-dot distance DD. If not specified,
The inter-dot distance DD is set to a predetermined value (step S34).

Next, the CPU 21 performs a process of calculating the scanning speed VS shown in FIG. 6 based on the mark and arrangement information and the tact time TT (step S3).
5). Further, based on the scanning speed VS and the inter-dot distance DD, the CPU 21 calculates the Q switch frequency f by the following equation.
s is calculated (step S36).

Fs = (k.VS) / DD Here, k is a predetermined constant.

The CPU 21 supplies information on the mark and arrangement to be printed and the scanning speed VS to the galvanomirror control unit 22, supplies a lamp current control signal CN based on the laser output PL to the lamp power supply 20, and supplies the Q switch frequency f
By providing s to the Q switch control unit 25, the galvanomirrors 3a and 3b, the lamp power supply 20, and the Q switch 15 are controlled (step S37).

As described above, the user only has to specify the laser output PL and the tact time TT to obtain the scanning speed VS.
Optimum printing conditions can be set without designating the Q switch frequency fs.

FIG. 8 is a flowchart showing a fifth operation example of the laser marking device of this embodiment.

Here, it is assumed that the print list 200 shown in FIG. 9 has been created in advance. Print list 20 of FIG.
0 indicates a plurality of print samples 201 having different print densities.
Are formed. These print samples 201 are formed by changing the scanning speed and the laser output. In FIG. 9, a print sample 201 on each broken line is shown.
Have equal print densities. Here, the printing density includes the printing depth, the degree of coloring, and the like. Each print sample 20
1 is given a number as designation information.

The laser marking device of this embodiment has a function of creating the print list 200 shown in FIG. 9 by automatically changing the laser output and the scanning speed. Each print sample 2 of the print list 200 is stored in the memory 24.
The print density, scanning speed, and laser output corresponding to 01 are stored.

The user can input information about the mark and arrangement to be printed by the display / input device 23 and print list 2.
The number of the print sample 201 in 00 is designated. Thus, the CPU 21 inputs information about the mark to be printed and the arrangement from the display / input device 23 (step S4).
1) The number of the print sample 201 in the print list 200 is input (step S42).

Then, the CPU 21 determines the laser output and the scanning speed V corresponding to the input print sample number.
S is read from the memory 24 (step S43). Further, the CPU 21 calculates the Q switch frequency fs from the read scanning speed VS and the predetermined inter-dot distance DD by the following equation (step S44).

Fs = (k · VS) / DD where k is a predetermined constant.

The CPU 21 supplies information on the mark and arrangement to be printed and the scanning speed VS to the galvanomirror control unit 22, supplies a lamp current control signal CN based on the laser output PL to the lamp power supply 20, and supplies a Q switch frequency f
By giving s to the Q switch control unit 25, the galvanomirrors 3a and 3b, the lamp power supply 20 and the Q switch 15 are controlled (step S45).

As described above, the user can set the print list 200
The optimum printing conditions can be set only by designating the number of the print sample 201 in, without specifying the scanning speed VS, the laser output PL, and the Q switch frequency fs.

Note that the user may directly specify the print density instead of specifying the number of the print sample 201.

In the above operation example, the print samples 201 of the print list 200 are created by changing the scanning speed and the laser output, and the density of the print corresponding to each print sample 201, the scanning speed, and the laser output are stored in the memory 24. Although the relationship is stored, the print sample 200 of the print list 200 is stored.
1 may be created by changing the Q switch frequency and the laser output, and the memory 24 may store the relationship between the print density, the Q switch frequency, and the laser output corresponding to each print sample 201.

In this case, the laser outputs PL and Q corresponding to the number of the print sample 201 input in step S43.
The switch frequency fs is read, and in step S44, the scanning speed VS is calculated based on the Q switch frequency fs and the dot interval DD.

FIGS. 10 and 11 are flowcharts showing a sixth operation example of the laser marking device of the present embodiment.

The printing density can be adjusted by the laser output. However, when the laser output falls below a certain value, the print density rapidly decreases. For this reason, when the laser output exceeds a certain value, the print density is adjusted by the laser output, and when the laser output is less than a certain value, the print density is adjusted by the scanning speed and the Q switch frequency. When the scanning speed is increased and the Q switch frequency is increased at the same time, the charge amount per dot is reduced, and the print density is reduced.

Here, as in FIG. 9, it is assumed that the print list 200 shown in FIG. 12 has been created in advance. FIG.
In the second print list 200, a plurality of print samples 201 having different print densities are formed. These print samples 201 are formed by changing the scanning speed and the laser output. In FIG. 12, the print samples 201 on each broken line have the same print density. Each print sample 201 is assigned a number as designation information.

The laser marking apparatus of this embodiment has a function of automatically creating the print sample 201 shown in FIG. 12 by changing the scanning speed and the laser output. Each print sample 2 of the print list 200 is stored in the memory 24.
01, the relationship between the print density, the scanning speed, and the laser output is stored.

The user can input information regarding the mark and arrangement to be printed by the display / input device 23, and the tact time TT.
And the number of the print sample 201 in the print list 200 is designated. Accordingly, the CPU 21 inputs information on the mark and arrangement to be printed from the display / input device 23 (step S51 in FIG. 10), inputs the tact time TT (step S52), and prints the print sample 201 in the print list 200. Is input (step S53).

Then, the CPU 21 reads from the memory 24 the printing conditions (scanning speed and laser output) of the print sample 201 having the same print density as the input print sample 201 (step S54). Further, the CPU 21
The minimum scanning speed VS0 at which the mark specified within the tact time TT can be printed is calculated based on the information on the mark to be printed and the arrangement and the tact time TT (step S55).

Next, the CPU 21 extracts printing conditions including a scanning speed equal to or higher than the minimum scanning speed VS0 among the read printing conditions (step S56).

If a print sample 201 having a print density that is too high to satisfy the tact time TT is specified, there is no print condition to be extracted (step S57), and a warning is output from the display / input device 23 (step S57). Step S5
8) Return to step S53.

If there is a printing condition to be extracted (step S57), a predetermined value PL0
The printing conditions including the above laser output are detected (step S59 in FIG. 11). Then, a printing condition including the lowest scanning speed among the detected printing conditions is selected (step S60). The scanning speed and the laser output of the selected printing condition are set as the scanning speed VS and the laser output PL, respectively (step S61).

Further, the CPU 21 calculates the Q switch frequency fs based on the scanning speed VS (step S6).
2). The method for calculating the Q switch frequency fs is the same as that in step S44 in FIG.

The CPU 21 supplies the information about the mark to be printed and the arrangement and the scanning speed VS to the galvanomirror control unit 22, and outputs a ramp signal CN based on the laser output PL.
To the lamp power supply 20 and the Q switch frequency fs to the Q switch control unit 25 to control the galvanomirrors 3a and 3b, the lamp power supply 20 and the Q switch 15 (step S63).

As described above, the user sets the tact time TT
By simply designating the number of the print sample 201 in the print list 200, the optimum print conditions can be set without specifying the scanning speed VS, the laser output PL, and the Q switch frequency fs.

In the above operation example, when the density is higher than a certain density, the print density is adjusted by the laser output, and when the density is lower than the certain density, the print density is adjusted by the scanning speed.

In the above operation example, the print sample 201 of the print list 200 is created by changing the scanning speed and the laser output, and the print sample 201 is stored in the memory 24.
The relationship between the print density, the scanning speed, and the laser output corresponding to the print list 200 is stored.
01 may be created by changing the Q switch frequency and the laser output, and the memory 24 may store the relationship between the print density, the Q switch frequency, and the laser output corresponding to each print sample 201.

In this case, the minimum Q switch frequency is calculated in step S55, and the printing conditions including the Q switch frequency equal to or higher than the minimum Q switch frequency are extracted from the printing conditions read in step S56. Step S60
A printing condition including the lowest Q-switching frequency among the printing conditions detected in step S61 is selected, and the Q-switching frequency and the laser output of the printing condition selected in step S61 are set as the Q-switching frequency fs and the laser output PL, respectively. Calculates the scanning speed VS based on the Q switch frequency fs.

FIG. 13 is a flowchart showing a seventh operation example of the laser marking device of this embodiment.

As a special printing example by the laser marking device, there is foam printing (black printing). This foam print
Printing is performed with the Q-switch frequency set to a high value and the scanning speed set to a low value. Clear printing is possible depending on the material of the object. In foam printing, the relationship between the scanning speed and the Q switch frequency is not uniformly determined.

The laser marking apparatus of this embodiment has a function of creating a plurality of print samples having different foam printing degrees by changing the scanning speed and the Q switch frequency. The relationship between the scanning speed and the Q-switch frequency corresponding to the degree of each foam print is stored in advance in the memory 24 for each material of the object.

The user designates information on the mark and arrangement to be printed by the display / input device 23, the laser output PL, the material of the object, and the degree of foam printing. Accordingly, the CPU 21 inputs information about the mark to be printed and the arrangement from the display / input device 23 (step S71), and inputs the laser output PL (step S71).
72), the material of the object is input (step S73), and the degree of foam printing is input (step S74).

Then, the CPU 21 reads the scanning speed VS and the Q switch frequency fs from the memory 24 based on the material of the object and the degree of foam printing (step S75).

The CPU 21 supplies information on the mark and arrangement to be printed and the scanning speed VS to the galvanomirror control section 22, supplies a lamp control signal CN based on the laser output PL to the lamp power supply 20, and controls the Q switch frequency fs to the Q switch control. By giving the power to the section 25, the galvanomirrors 3a and 3b, the lamp power supply 20 and the Q switch 15
Is controlled (step S76).

As described above, the user only has to specify the laser output PL, the material of the object, and the degree of foam printing, and
Optimal printing conditions can be set without specifying the scanning speed VS and the Q switch frequency fs.

FIG. 14 is a flowchart showing an eighth operation example of the laser marking device of this embodiment.

In the eighth operation example, the laser output PL in the seventh operation example is replaced with the print density.

Also in the eighth operation example, the memory 24
The relationship between the scanning speed and the Q switch frequency corresponding to the degree of each foam print is stored in advance for each material of the object. The relationship between the print density and the laser output is also stored in the memory 24 in advance.

The user designates information on marks and arrangements to be printed by the display / input device 23, the density of printing, the material of the object, and the degree of foam printing. Accordingly, the CPU 21 inputs information about the mark to be printed and the arrangement from the display / input device 23 (step S8).
1) Input the density of printing (step S82), input the material of the object (step S83), and input the degree of foam printing (step S84).

Then, the CPU 21 determines the laser output PL based on the print density (step S85). Further, the CPU 21 reads the scanning speed VS and the Q switch frequency fs from the memory 24 based on the material of the object and the degree of the foam printing (step S86).

The CPU 21 supplies the information on the mark and arrangement to be printed and the scanning speed VS to the galvano mirror control section 22, supplies the lamp power control signal CN based on the laser output PL to the lamp power supply 20, and supplies the Q switch frequency f
By giving s to the Q switch control unit 25, the galvanomirrors 3a and 3b, the lamp power supply 20, and the Q switch 15 are controlled (step S87).

As described above, the user only needs to specify the printing density, the material of the object, and the degree of foam printing, and can specify the optimum printing without specifying the scanning speed VS, the laser output PL, and the Q switch frequency fs. Conditions can be set.

[Brief description of the drawings]

FIG. 1 is a schematic view of a laser marking device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a main part in the laser marking device of FIG.

FIG. 3 shows a first example of the laser marking device shown in FIGS. 1 and 2;
6 is a flowchart showing an operation example of the above.

FIG. 4 shows a second example of the laser marking device shown in FIGS. 1 and 2;
6 is a flowchart showing an operation example of the above.

FIG. 5 shows a third example of the laser marking device shown in FIGS. 1 and 2;
6 is a flowchart showing an operation example of the above.

FIG. 6 is a flowchart illustrating a calculation process of a scanning speed.

FIG. 7 shows a fourth embodiment of the laser marking device shown in FIGS. 1 and 2;
6 is a flowchart showing an operation example of the above.

FIG. 8 shows a fifth embodiment of the laser marking device of FIGS. 1 and 2;
6 is a flowchart showing an operation example of the above.

FIG. 9 is a diagram illustrating an example of a print list.

FIG. 10 is a flowchart showing a sixth operation example of the laser marking device of FIGS. 1 and 2;

FIG. 11 is a flowchart showing a sixth operation example of the laser marking device of FIGS. 1 and 2;

FIG. 12 is a diagram illustrating an example of a print list.

FIG. 13 is a flowchart showing a seventh operation example of the laser marking device of FIGS. 1 and 2;

FIG. 14 is a flowchart showing an eighth operation example of the laser marking device shown in FIGS. 1 and 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Laser oscillator 2 Control part 15 Q switch 20 Lamp power supply 21 CPU 22 Galvano mirror control part 23 Display / input device 24 Memory 25 Q switch control part

Claims (13)

[Claims] 1. A laser marking device for irradiating a laser beam onto a surface of an object to print a mark, comprising a Q switch, a laser oscillator for emitting the laser beam, and a laser beam emitted from the laser oscillator. Scanning means for scanning laser light on the surface of the object; input means for inputting print information on a mark to be printed, laser output and scanning speed of laser light; and scanning of the laser light inputted by the input means Calculating means for calculating the frequency of the Q switch based on the speed; the print information input by the input means, the scanning speed of the laser output and the laser light, and the frequency of the Q switch calculated by the calculating means And a control means for controlling the laser oscillator and the scanning means based on the Grayed apparatus. 2. A laser marking device for irradiating a laser beam on a surface of an object to print a mark, comprising a Q switch, a laser oscillator for emitting the laser beam, and an laser beam emitted from the laser oscillator. Scanning means for scanning the surface of the object with laser light; input information for inputting printing information on a mark to be printed, laser output and the frequency of a Q switch; and a frequency of the Q switch input by the input means Calculating means for calculating the scanning speed of the laser light based on the print information input by the input means, the laser output and the frequency of the Q switch, and the scanning speed of the laser light calculated by the calculating means. And a control means for controlling the laser oscillator and the scanning means based on the laser mark. Grayed apparatus. 3. A laser marking device for irradiating a laser beam on a surface of an object to print a mark, comprising a Q switch, a laser oscillator for emitting the laser beam, and an laser beam emitted from the laser oscillator. Scanning means for scanning the surface of the object with laser light; input means for inputting print information relating to a mark to be printed, allowable print time, laser output, and frequency of a Q switch; and the printing input by the input means Calculating means for calculating the scanning speed of the laser beam based on the information and the permissible printing time; the print information input by the input means, the laser output and the frequency of the Q switch, and calculated by the calculating means Control means for controlling the laser oscillator and the scanning means based on the scanning speed of the laser light. Laser marking apparatus according to claim. 4. A laser marking device for irradiating a laser beam onto a surface of an object to print a mark, comprising a Q switch, a laser oscillator for emitting the laser beam, and a laser beam emitted from the laser oscillator. Scanning means for scanning the surface of the object with laser light; input means for inputting print information on a mark to be printed, allowable print time and laser output; and the print information and the allowable print input by the input means Calculating the scanning speed of the laser light based on the time,
Calculating means for calculating the frequency of the Q switch based on the calculated scanning speed of the laser light; the print information and the laser output input by the input means; and the laser light calculated by the calculating means And a control means for controlling the laser oscillator and the scanning means based on the scanning speed and the frequency of the Q switch. 5. The input means further inputs an interval between dots formed on the surface of the object by a laser beam, and the calculating means further based on the interval between the dots input by the input means. The laser marking device according to claim 1, wherein a frequency of the Q switch or a scanning speed of the laser beam is calculated. 6. A laser marking device for irradiating a laser beam on a surface of an object to print a mark, comprising a Q switch, a laser oscillator for emitting the laser beam, and an laser beam emitted from the laser oscillator. Scanning means for scanning the surface of the object with laser light, storage means for storing a relationship between the scanning speed and laser output of the laser light corresponding to a plurality of print samples, print information on a mark to be printed, and Input means for inputting designation information for designating one of the print samples, and extraction means for extracting a scanning speed and a laser output of a corresponding laser beam from the storage means based on the designation information input by the input means. Calculating means for calculating the frequency of the Q switch based on the scanning speed of the laser light extracted by the extracting means; The laser oscillator and the scanning unit based on the input printing information, the scanning speed and the laser output of the laser beam extracted by the extracting unit, and the frequency of the Q switch calculated by the calculating unit. And a control means for controlling the laser marking. 7. A laser marking device that irradiates a laser beam onto a surface of an object to print a mark, comprising a Q switch, a laser oscillator that emits the laser beam, and a laser beam emitted from the laser oscillator. Scanning means for scanning the surface of the object with laser light; storage means for storing a relationship between a frequency of a Q switch and laser output corresponding to a plurality of print samples; print information on a mark to be printed; Input means for inputting designation information for designating any of the print samples; extracting means for extracting a frequency and a laser output of a corresponding Q switch from the storage means based on the designation information input by the input means; Calculating means for calculating a scanning speed of the laser beam based on the frequency of the Q switch extracted by the extracting means; The laser oscillator and the scanning unit based on the printing information input by the CPU, the frequency of the Q switch and the laser output extracted by the extracting unit, and the scanning speed of the laser light calculated by the calculating unit. And a control means for controlling the laser marking. 8. A laser marking device for irradiating a laser beam on a surface of an object to print a mark, comprising a Q switch, a laser oscillator for emitting the laser beam, and an laser beam emitted from the laser oscillator. Scanning means for scanning the surface of the object with laser light; storage means for storing the relationship between the print density corresponding to a plurality of print samples, the scanning speed of the laser light and the laser output; and print information for marks to be printed Input means for inputting designation information for designating an allowable printing time and any one of the plurality of printing samples, and a scanning speed of a corresponding laser beam from the storage means based on the designation information input by the input means. The laser output is extracted, and the scanning speed and the scanning speed of the laser beam corresponding to the print sample having the same print density as the print sample specified by the specification information are obtained. Extracting means for extracting a laser output; selecting means for selecting the slowest laser light scanning speed and the corresponding laser output satisfying the permissible printing time among the scanning speeds of the laser light extracted by the extracting means; Calculating means for calculating the frequency of the Q switch based on the scanning speed of the laser light selected by the selecting means; the printing information input by the input means; the scanning speed of the laser light selected by the selecting means And a control means for controlling the laser oscillator and the scanning means based on the laser output and the frequency of the Q switch calculated by the calculation means. 9. The method according to claim 1, wherein the selecting unit detects a laser output of a predetermined value or more and a scanning speed of a corresponding laser beam among the laser outputs extracted by the extracting unit, and detects a scanning speed of the detected laser beam. 9. The laser marking device according to claim 8, wherein a scanning speed of a slow laser beam and a corresponding laser output are selected. 10. A laser marking device for irradiating a laser beam on a surface of an object to print a mark, comprising a Q switch, a laser oscillator for emitting the laser beam, and an laser beam emitted from the laser oscillator. Scanning means for scanning the surface of the object with laser light, storage means for storing the relationship between the density of printing corresponding to a plurality of printing samples, the frequency of the Q switch and the laser output, and printing information on marks to be printed, Input means for inputting designating information for designating an allowable printing time and any of the plurality of print samples; and a frequency and a laser output of a corresponding Q switch from the storage means based on the designating information inputted by the input means. And the frequency and frequency of the Q switch corresponding to the print sample having the same print density as the print sample specified by the specification information. Extracting means for extracting a laser output and a laser output corresponding to the lowest frequency of the Q switch satisfying the permissible printing time among the frequencies of the Q switches extracted by the extracting means; Calculating means for calculating the scanning speed of the laser beam based on the frequency of the Q switch selected by the means; the print information input by the input means; the frequency of the Q switch selected by the selecting means; A laser marking apparatus comprising: a laser output; and a control unit that controls the laser oscillator and the scanning unit based on the scanning speed of the laser light calculated by the calculation unit. 11. The selecting means detects a laser output of a predetermined value or more and a frequency of a corresponding Q switch among the laser outputs extracted by the extracting means, and detects a lowest Q among the detected frequencies of the Q switch. 11. The laser marking device according to claim 10, wherein a frequency of the switch and a corresponding laser output are selected. 12. A laser marking device for irradiating a laser beam on a surface of an object to print a mark, comprising a Q switch, a laser oscillator for emitting the laser beam, and an laser beam emitted from the laser oscillator. Scanning means for scanning the surface of the object with the laser light; storage means for storing the relationship between the scanning speed of the laser light and the frequency of the Q switch corresponding to the degree of foaming printing; printing information on a mark to be printed; Input means for inputting a degree of laser output and a laser output; extracting means for extracting a scanning speed of a corresponding laser beam and a frequency of a Q switch from the storage means based on the degree of foaming input by the input means; The print information and the laser output input by the input means, and the laser light extracted by the extraction means A laser marking device comprising: a control unit that controls the laser oscillator and the scanning unit based on a scanning speed and a frequency of the Q switch. 13. A laser marking device for irradiating a laser beam on a surface of an object to print a mark, comprising a Q switch, a laser oscillator for emitting the laser beam, and an laser beam emitted from the laser oscillator. Scanning means for scanning the surface of the object with laser light; storage means for storing the relationship between the scanning speed of the laser light and the frequency of the Q switch corresponding to the degree of foam printing; printing information and printing on marks to be printed Input means for inputting the density and the degree of foaming, setting means for setting a laser output based on the density of the print input by the input means, and based on the degree of foaming input by the input means. Extracting means for extracting the scanning speed of the corresponding laser beam and the frequency of the Q switch from the storage means; Control for controlling the laser oscillator and the scanning means based on the print information, the laser output set by the setting means, and the scanning speed of the laser light extracted by the extraction means and the frequency of the Q switch. And a laser marking device.