OMTech 40W CO2 Settings for Leather

Cutting Settings

How to Set Up Leather on the OMTech 40W CO2

1. 1Secure your leather flat on the work bed using clamps, magnets, or a honeycomb pin set to prevent movement during the job.
2. 2Set your focus distance accurately — use the auto-focus probe if your machine has one, or measure manually with the focus gauge.
3. 3Ensure your water cooling system is running and the coolant temperature is between 15–25°C before starting the laser.
4. 4Verify your leather is vegetable-tanned, not chrome-tanned. Chrome-tanned leather releases toxic hexavalent chromium fumes when lasered and must never be used.
5. 5Enable air assist if available. A steady stream of air at the cut point removes debris, reduces charring, and helps prevent flare-ups.
6. 6Enter the speed, power, and pass count from the settings table above into LightBurn. Use the “Cut” or “Engrave” layer settings panel.
7. 7Run a small test cut or engrave on a scrap piece of leather before committing to your final project piece. Adjust power up or down by 5–10% based on results.

What to Expect When Lasering Leather

Laser-engraved leather darkens in the engraved areas, creating a branded or burned appearance with a distinctive smell similar to a campfire. Cut edges will be sealed and slightly darkened. The depth and darkness of engraving depends on power — lower power produces a subtle golden tone, while higher power creates a deep dark brown. Expect a noticeable odor; good ventilation is essential.

Common Mistakes to Avoid

• ✗Running at full power on the first attempt — always start with a test piece at the recommended settings and adjust incrementally. Going straight to maximum power risks burning through the material or causing fire.
• ✗Forgetting to check the water cooling system before starting. CO2 laser tubes can overheat and suffer permanent damage if the coolant is not flowing or is above 25°C.
• ✗Using chrome-tanned leather instead of vegetable-tanned leather — chrome-tanned leather releases toxic hexavalent chromium fumes when heated. This is dangerous and must be avoided. Always verify the tanning method before lasering any leather.
• ✗Setting power too high when engraving leather — it is easy to burn through thin leather. Start with low power and increase gradually.

Tips for Leather on Laser Machines

• ✓Vegetable-tanned leather gives the best engraving contrast and smell.
• ✓Use low power for engraving to avoid burning through thin leather.
• ✓Dampen the surface slightly for a cleaner, darker engrave.
• ✓Air assist helps prevent flare-ups on thinner hides.
• ✓Test on a scrap piece -- leather thickness and density vary widely.

Frequently Asked Questions

Other Materials for OMTech 40W CO2

Leather Settings for Other Machines