CO2 laser power supply is a supporting power supply for carbon dioxide lasers
introduce:
The CO2 laser power supply is a supporting power supply for carbon dioxide lasers. It has the characteristics of small size, light weight, and easy operation. Some lasers have good matching performance and can be directly connected to the laser, eliminating the need for heavy and serious heating ballast resistors. The power supply can make the carbon dioxide laser start easily, the performance of the carbon dioxide laser can be fully exerted, the conversion efficiency is improved, and the life of the laser is prolonged.
use:
Acrylic engraving machine, acrylic cutting machine, fabric engraving, fabric cutting, two-color plate engraving, two-color plate cutting, rubber plate engraving, rubber plate cutting, leather engraving, leather cutting, etc.
Operation method:
1. Laser tube connection:
The high voltage (HV+) of the laser power supply must be connected to the anode (total reflection end) of the carbon dioxide laser tube. The current loop of the laser power supply is connected to the cathode (laser output end) of the carbon dioxide laser tube through an ammeter (or directly).
2. Connection of control signal:
Connect the control signal lines to the control terminals of the laser power supply respectively and reliably.
3. Input of control signal:
Input the DAC signal and TTL signal output by the external computer into the laser power supply as required, and then the laser tube can be controlled to output the laser as required.
4. Voltage selection:
The laser power supply requires an input of 220VAC/50Hz, if 110VAC is required, it should be specially ordered.
5. Additional features:
The laser power supply has a set of protection switches, which can be connected in series for water protection, protection when opening the shell, etc.
Precautions:
1. The laser tube must be cooled with water when working!
2. The high-voltage output terminal must not be open-circuited! (The positive and negative terminals of the high-voltage output must be correctly connected to the positive and negative terminals of the laser.
3. A bleeder resistor has been added inside the power supply, and the residual voltage can generally be discharged within two seconds after the power supply is cut off. But for the sake of safety, you should still pay attention to beware of electric shock! (The insulation safety requirements of 40KV high voltage must be guaranteed at both ends of the high voltage output.)
4. The laser power supply must use a three-hole socket with a ground terminal. The chassis must be strictly grounded! To avoid electric shock.
Working gas:
Typical working gases for CO2 lasers contain: carbon dioxide, nitrogen, helium and xenon. Nitrogen and helium are beneficial to discharge uniformity. Xenon has a positive effect on the power and efficiency of RF discharge lasers. Adding 5% xenon increases power by 24%.
Usually single-mode structure devices, the continuous (radio frequency) excitation power injected per unit length is limited to 2~6W/cm, and the conversion efficiency is 10%~20%. The general requirements for laser power supply are: stable and reliable, convenient maintenance, high efficiency, size Small and low cost.
The specific technical conditions are as follows: Input parameters: AC input voltage 220V; AC input current 1.5A; switching power supply output DC voltage 30V; switching power supply output current 8A. RF power supply: input power 160W; operating frequency 40MHz; output waveform sine wave; bandwidth ±3MHz; efficiency 70%. Modulator: pulse modulation frequency 0~100kHz square wave is continuously adjustable; duty cycle is continuously adjustable; amplitude modulation is 100%.
Classification:
The operating frequency of CO2 laser is 27~40MHz according to ISM regulations; its main classification is as follows:
(1) According to the output method
1) Continuous output;
2) Pulse output - modulation frequency up to 1MHz;
3) Q switch output - electro-optical Q-switching and acousto-optic Q-switching.
(2) According to the work of the resonant cavity
1) Waveguide cavity--aperture D=1~3mm;
2) Free space cavity -- aperture D=4~6mm.
(3) According to the excitation polarity
1) Single phase;
2) Invert.
(4) According to the cavity structure
1) Single cavity;
2) Multi-cavity; (a) Folding cavity: V-type--2 folds; Z-type--3 folds; X-type--4 folds. (b) Array cavity: short shoulder array; staggered array. (c) Building block type: parallel-2 chambers; triangular group-3 chambers.
3) Large area discharge (a) Flat type, (b) Concentric ring type.
(5) According to the distribution of the average constant inductance
1) Quasi-inductance resonance technology - for low capacitance laser heads; 2) Parallel distributed inductance resonance technology - for high capacitance laser heads.
(6) According to the resonant cavity material
1) Ceramic-metal hybrid type; 2) All-ceramic type; 3) All-metal type.
(7) According to the cooling method
1) Air cooling; 2) Water cooling.
(8) According to the packaging method
1) Seal and release type; 2) Flow type. The material of the resonant cavity is generally: metal-A1. Ceramics - BeO, BN, AIN, Al2O3, etc.
