Applies to: REDLINE MIRA S and NOVA S
This guide explains the air assist options on your REDLINE machine, how they affect engraving and cutting, and how to control them. It covers the built-in air assist system, the difference between low and high air pressure, and how an external compressor can improve your results.
When to use this guide
Adjust air assist when you switch between engraving and cutting, and when you change materials. The right air pressure improves engraving detail, reduces charring and makes cutting more efficient. Check your air settings when you troubleshoot inconsistent cuts, smoke buildup or discolored material. If you are adding an external compressor, proper setup and calibration matter too.
What you need
- An AEON CO2 laser
- External air compressor (optional)
Why airflow matters
Airflow is central to clean results and to the life of the machine.
- When engraving, a steady stream of air clears smoke and fine debris that would otherwise settle on the material and stain it. This matters most with wood, acrylic and coated metals, where smoke leaves a residue that dulls the design. Airflow also stops heat building up around the beam, which gives a sharper engrave with less scorching.
- When cutting, airflow blows vaporized material and charred particles out of the cut path, which gives smooth edges and fewer burn marks. Without enough air, heat lingers in the cut and can cause charring, warping or flare-ups in materials like wood and acrylic. Smoke and debris can also cloud the laser path, which reduces cutting efficiency and gives inconsistent results.
- For the machine, airflow keeps the lens clean and free of contaminants that would degrade the optics over time.
Air pressure levels
Air pressure falls into two broad levels. Whatever the job, there should always be some airflow from the nozzle while the machine is running.
| High pressure | Low pressure | |
|---|---|---|
| Range | 15 to 40 PSI | 1 to 5 PSI |
| Main use | Cutting | Engraving |
| What it does | Blows vaporized material out of the kerf for cleaner, deeper cuts. Reduces charring and burning on cut edges. Prevents heat buildup, which minimizes warping. | Keeps smoke and debris away from the lens. Prevents discoloration and scorching. Allows finer detail without overcooling the engraving area. |
REDLINE air controls
Every REDLINE model except the MIRA 5S shows the PSI coming out of the laser head on the main control keypad.
REDLINE MIRA S
The air regulator dial on the right side of the machine controls the air pressure at the laser head, for both internal and external air.
- Turn the dial to the left (+ symbol) to increase the airflow.
- Turn the dial to the right (− symbol) to decrease the airflow.
A REDLINE MIRA S does not come with an external air compressor. You can buy one and connect it to the External Air port on the rear of the machine, using the 6 mm air fitting. For help choosing one, contact our sales team at sales@aeonlaser.us.
REDLINE NOVA S
The air regulator dial on the right side of the machine controls the air pressure at the laser head, for both internal and external air.
- Turn the dial to the left (− symbol) to decrease the airflow.
- Turn the dial to the right (+ symbol) to increase the airflow.
The dial locks in place to hold its pressure setting. Gently pull it out to unlock and adjust it, and push it in to lock it.
A REDLINE NOVA S comes with an air compressor installed as well as an air pump, so it produces both high and low pressure air with no extra attachments.
The pressure of the compressor is set separately at the Oil-Water Separator Drain panel, on the rear bottom corner of the machine next to the chiller. Pull the panel out to reveal the internal water separator. It is adjusted the same way as the dial above.
Switch between internal and external air in LightBurn
On both the MIRA S and the NOVA S, LightBurn controls whether the machine uses the internal air pump or the external air source.
The Cuts/Layers window has an option called Air. In the Cut Settings Editor window it is called Air Assist. This switch toggles the solenoid between internal and external air.
- Switch Air on to use the external air source.
- Switch Air off to use the internal air pump.
Summary
Match the air pressure to the job: low pressure for fine engraving, high pressure for clean cuts. Knowing how to switch between internal and external air gives you full control of airflow for each material and project, with less charring and a longer life for your optics.
AEON Laser USA is not responsible for any damages or injuries that may result from following these suggestions. Use caution at all times.
Need a hand?
Email support@aeonlaser.us or call 321-260-2325. More ways to reach us are on the Support page.