N Series RF CO2 Lasers

Artificial pre-ionization signal before laser output requirement:

In N-Series rf co2 lasers, N10, N60 rf co2 laser tube need an external plate to provide pre-ionization signals, with 5KHz, 1μs parameters. The N30,N30Pro,N30Pro+ has a pre-ionization circuit module, so the user does not need to give the rf co2 laser tube additional pre-ionization signals.

Storage and transportation of rf co2 lasers:

1. In order to prevent the rf laser tube output window from contamination, the rf laser tube output window must be sealed during storage and transportation.

2. Handle gently to avoid accidental impact to the rf laser tube.

Fault diagnosis and elimination of rf laser tube indicator:

When the rf co2 laser tube works normally, the power supply indicator (green light) turns on after power-on and the laser indicator (pre-ionization signal provided by software) turns on slightly after a 5 seconds’ delay. Once the marking software gives the control signal, the laser indicator (red light) turns on.

1. The green light does not turn on after power supply is turned on.

Check if the DC power supply voltage is within the required range (48±2V), and check if the connection of RJ45 connector is correct.

2. The green light is normal and the red light is not on after the electricity is turned on.

Check if the labeled software has control signal output (or multimeter measurement), and check if the connection of RJ45 connector is correct.

3. The green light is normal after turning power on. After 5 seconds the green light is off or the green light is off after the control signal is given.

This is usually caused by damage to the internal circuit board of the rf laser tube or the internal parts of the laser tube cavity, it needs to be sent back for inspection at the factory.

All-metal rf co2 laser tube environment requirements

1. Temperature: ambient temperature should be between 5 and 40 degrees, and air conditioner should be used when necessary.

2. Cleanliness: without external dust protective equipment, high dust content ambient will cause the rf co2 laser tube's output window lens to burn out.

3. Humidity: ambient humidity should be maintained low enough to keep condensation to appear in the rf laser.

4. PH: Environmental PH should be neutral.

Do not wipe the lens of the rf co2 laser tube output window with a cotton swab

Wiping with a cotton swab will further damage the lens. If a small amount of particles are attached to the front lens and the film has not been burned, you can try blowing the lens with 99.95% nitrogen. 

Choosing the size of the lens in the light path with a know spot size

The size of the lens in the external light path should be 1.5-2 times the size of the actual spot.

Processing terminal power too low despite a normal output power

This is usually caused by a high energy loss in the external light path of the rf co2 laser tube. Check the following points: 

1. Check if the size of the external light path lens and the aperture are large enough

2. Check if the lens quality of the external light path is qualified (the loss of a single lens can not be higher than 3%)

3. Check if the lenses of the external light path are contaminated or damaged

4. Check if the external light path has been correctly aligned

Check if the external light path has been correctly aligned

When this happens, please first check the following:

1. Use a multimeter to measure whether the DC power supply voltage of the laser is normal

2. Use an oscilloscope to measure whether the control signal to the rf co2 laser tube is normal

Announcements

1. Since the peak current required by the rf co2 laser will directly affect the lifetime of the self-purchased/self-made DC power supply, it is recommended to use a DC power supply with high stability. The power input shall be a single-phase AC with a voltage range of 100-240V and a voltage range of 50-60Hz. In order to ensure a good grounding, it is necessary to connect the negative pole of the output terminal of DC power supply to the ground reliably. In addition, if the connecting cable between the laser head and the DC power supply exceeds 3 meters, the negative pole of the power supply terminal on the laser head needs to be reliably connected to the ground.

2. Because the rf co2 laser tube has strict requirements on the range of input voltage fluctuation, in order to avoid damage to the rf laser due to excessive voltage fluctuation, it is recommended to use the over-voltage protection circuit at the input end of the rf laser power supply.

3. If the user chooses a low stability DC power supply, the DC power supply must have sufficient current and instantaneous voltage adjustment ability.

4. When connecting the rf laser power supply, the connection should be based on the specifications of the label at the back end of the rf laser. The positive pole of the rf laser power supply marked “+” must be connected to the positive output of the DC power supply; the negative pole of the rf laser power supply marked “-” must be connected to the negative output of the DC power supply. The maximum cable length required for laser DC power supply is 45 cm. When connecting the cable, the cable between the DC power supply and the laser can be twisted into a strand, which can reduce the mutual inductance between the terminals.

5. The rf laser shell and DC power supply must be well grounded. If they are not or poorly grounded, there will be excessive noise, which will directly damage the rf co2 laser tube.

6. When testing DC power supply, first measure its multimeter (measuring voltage) and oscilloscope (measuring ripple size) under no-load condition, and then measure it with rf laser load (full-amplitude output of laser) in order to confirm that the DC power supply (voltage and current) is conforming with the rf co2 laser tube requirements.

7. When connecting the cable terminals with the electrodes on the laser, do not exert too much force. Excessive twisting force will cause irreparable damage to the RF amplifier in the laser. For other details, please refer to the product description.

External cooling system of rf laser tube

Cooling System Reqirements：

N10:
1. The N10 rf excited laser tube uses air-cooled heat dissipation. Users must install heat dissipation fans to prevent instability or damage to the rf laser tube caused by overheating. There must be at least 2 cooling fans, and the speed of a single fan must be greater than 250CFM (about 7.1 cubic meters per minute) 

2. The cooling fan should be symmetrically mounted on both sides of the rf co2 laser tube. The distance between the fan and the rf laser tube should not exceed 1cm. In order to ensure that the rf co2 laser tube has good heat dissipation performance, the air flow must be blown vertically into the radiation grooves on both sides of the rf laser.

N30:

1.Air cooling

The N30（Air cooling） CO₂ Lasercomes with fans and there has to be 6cm space left between the fans and other objects on each side during mounting. If the laser is covered with a shell, there should be holes or external fans mounted on the shell to ensure proper ventilation ( air flow is ≥ 6m³/m). If the laser works in a dusty environment, attach a strainer and fans onto the shell. The strainer has to be cleaned regularly. ( If the operation environment isextremely dusty, please chooseN30 (water-cooled) instead.)

Qualified Ventilation: If the ventilation is proper, the temperature rise of N30 shall be ≤20 °C during operation compare to when it is in OFF state. The ambient temperature should be within 5 ~ 45 ℃, and the maximum temperature of the laser surface should be less than 65 ℃.

2.Water cooling

N30 CO₂ laser is cooled with coolant.

Coolant requirements:

N30Pro/N30Pro+:

Air cooling

The N30Pro/N30Pro+ CO₂ Lasercomes with fans and there has to be 6cm space left between the fans and other objects on each side during mounting. If the laser is covered with a shell, there should be holes or external fans mounted on the shell to ensure proper ventilation ( air flow is ≥ 6m³/m). If the laser works in a dusty environment, attach a strainer and fans onto the shell. The strainer has to be cleaned regularly. 

Qualified Ventilation: If the ventilation is proper, the temperature rise of N30Pro/N30Pro+ shall be ≤20 °C during operation compare to when it is in OFF state. The ambient temperature should be within 5 ~ 45 ℃, and the maximum temperature of the laser surface should be less than 65 ℃.

About the sealing label function on the rf laser tube’s surface:

Each rf excited laser tube has a sealed label. Please take special care to protect the sealed label. If the sealed label is damaged, the laser will not be able to receive proper maintenance service.

The quality guarantee period of industrial CO2 RF laser tube produced by our company is as follows (including inventory period) from the manufacture date.

N series: 24 months

Service method:

If the CO2 RF laser you purchased breaks down during the warranty period, please show relevant certificates, keep the factory logo and sealed label intact, product appearance must stay intact, and contact our company for a warranty replacement.

The following circumstances are not covered by the warranty:

1. Damaged warranty label on the rf laser tube;

2. Laser tube faults and damages caused by human factors;

3. Failure or damage caused by incorrect wiring, installation and use which are not in accordance with the given instructions;

4. Failure or damage caused by natural disasters and other force majeure factors (such as earthquake and fire);

5. Other faults or damages not caused by quality problems of the rf co2 laser tube itself.