How do you laser cut wood?

Which laser to use, the settings that cut clean instead of charring, and how to get smoke-free edges — a practical guide from Boss Laser.

Use a CO2 laser and the right wood.

Wood is one of the best and most popular materials for a CO2 laser. The 10.6 µm beam is readily absorbed, burning a narrow line through the board. Material quality matters more than people expect: laser-grade plywood is made without the glue voids and gaps found in cheap construction ply, which cut unevenly and flare. Solid hardwoods cut and engrave beautifully; denser woods give cleaner edges and higher engraving contrast. Boss LS and HP series CO2 machines are built for this work.

Dial in settings and reduce charring.

1. Use high power and low speed to cut through in one clean pass; add passes for thick stock rather than forcing one slow burn.
2. Keep air assist on. It blows out flame and smoke, which means cleaner edges and less scorching.
3. Set focus to the top surface for a crisp, narrow cut.
4. Mask or sand to manage smoke staining. Application tape on the surface, or a light sanding after, removes the brown smoke residue around cuts.
5. Run a test on scrap of the same board before committing to the full sheet.

How much power and how thick?

Power sets your speed and thickness, not whether wood cuts at all. A small diode engraver can cut thin wood slowly; a 40 W CO2 cuts up to roughly ¼″ in a pass, and higher-wattage CO2 systems cut thicker stock faster. For thick hardwood, more power or multiple passes beats one very slow pass that chars the edge. Because wood burns, run exhaust, keep the bed clear of debris, and never run a wood job unattended.

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