K40 CO2 — Anodized Aluminum

What speed should I use to engrave Anodized Aluminum on the K40 CO2?

The top-rated community setting uses 250 mm/s at 25% power. LightBurn forum: K40 users report 250–300 mm/s at 8–9.5 mA (roughly 20–25% of a 40W tube) for anodized aluminum raster engrave. K40 Whisperer equivalent is ~6–8 mA on the dial. Black anodize works well; violet/purple anodize may not absorb the 10.6µm wavelength cleanly. Stock K40 typically has no air assist. Source: forum.lightburnsoftware.com/t/engraving-anodized-type-ii-aluminum-k40-laser/38334 + funinthefalls.gitlab.io/k40/cats/Materials%20and%20settings

Can the K40 CO2 cut Anodized Aluminum?

A 35W CO₂ laser can mark or engrave metal surfaces but cannot cut through them — metal cutting requires a much higher-powered laser or a plasma cutter.

How many passes does the K40 CO2 need to engrave Anodized Aluminum?

All settings here use a single pass. Confirm focus and do a small test burn before committing to your final design.

Do I need air assist for Anodized Aluminum on the K40 CO2?

Air assist is not flagged as required for these settings, but it is good practice during cutting operations to keep the lens clean and reduce char buildup.