Keywords: laser engraving, power adjustment, focal length optimization

Laser engraving achieves high-precision pattern transfer by instantly vaporizing the surface of wood through a focused light spot (0.05-0.3mm), and its effect depends on the dynamic matching of power, speed, and focal length.

Core parameter control:

Material adaptation matrix:

Recommended Wood Type Power (W) Carving Speed (mm/s) Focal Length (mm)

Pine wood (soft) 20-30 800-1200 15-20

Cherry wood (medium hard) 35-45 600-900 12-15

Poplar wood (hard) 50-60 400-700 10-12

Deep control techniques:

Layered carving: Achieving a three-dimensional effect through multiple scans (each with a depth of 0.1-0.3mm) to avoid single high-power burning of wood.

Pulse frequency adjustment: Hardwood needs to lower its frequency (≤ 5kHz) to reduce the heat affected zone, while softwood can increase it to 20kHz for finer edges.

Common problem solutions:

Edge carbonization: After carving, use a wire brush to lightly brush along the grain, or spray alcohol to instantly vaporize the residual coke layer.

Different depths: Check the flatness of the workbench (error ≤ 0.05mm), or use the two-step method of "shallow carving first and then fine finishing".

Industry Trends:

Picosecond laser (with a pulse width of 10 ^ -12 seconds) is entering the woodworking field, and its ultra short pulses can achieve "cold processing" with almost no thermal damage, suitable for carving micro scale textures.