OMTech Polar

254 DPI engrave at 22% gives clean lines without excessive burning into the grain. Use LightBurn's Stucki dithering for photo engraves — the tight grain of Baltic birch holds fine detail well.

Baltic birch is more consistent than standard plywood. At 72% and 18mm/s it cuts cleanly. The void-free core means fewer failed cuts mid-sheet. Great for jig templates and detailed puzzle pieces.

Walnut is denser than basswood so it needs slightly more power or slower speed. At 78% and 14mm/s it cuts through cleanly with minimal char. The natural dark grain means engraving shows beautiful contrast without burning.

Clean cuts on kraft paper at high speed and low power. Ideal for wedding invites, paper lanterns, and gift bags. Use a honeycomb or pin bed to support the paper without scorching.

Corrugated cardboard cuts cleanly at speed. Keep power low to avoid ignition — cardboard is highly flammable. Never leave the machine unattended. Great for prototyping jig designs before cutting the real material.

Single pass through 6mm MDF at 80%. MDF produces more fumes than plywood so ensure your exhaust is running at full capacity. Edges will have some char — sand lightly if painting. Avoid cutting MDF without air assist.

Bright white engrave on slate. Invert your image in LightBurn so the engraved areas appear light. Wipe the slate with a damp cloth after engraving to remove dust and reveal full contrast. No coating needed.

Rich dark brown mark at 18%. Leather is very easy to overpower with CO2 — start low and step up in 2% increments. Vegetable-tanned leather gives better contrast than chrome-tanned. Remove any protective coating first.

Frosted finish at 15% and 350mm/s. CO2 engraves acrylic cleanly without melting the surface. For photos, use a dithered image (Newsprint or Stucki in LightBurn) and invert for a light-on-dark result.

Slow and steady gets flame-polished edges on clear acrylic. Remove the protective film on the top only — leave the bottom film on to protect your bed. Good ventilation is critical; acrylic fumes are harmful.

Fast raster at 300mm/s and 20% — the CO2 beam gives a warm brown engrave without burning through. Drop to 15% for lighter marks on pale basswood. Grain direction affects contrast so rotate your artwork 90° and compare.

Single clean pass at 70% — pushing higher causes edge charring without improving cut speed on this 30W tube. Air assist is essential to prevent flame and keep edges clean. Always do a test strip when opening a new sheet as density varies between batches.

What materials can the OMTech Polar engrave or cut?

The OMTech Polar has community-tested settings for 3mm Baltic Birch Plywood, 3mm Walnut Plywood, Kraft Paper, Cardboard, 6mm MDF, Slate, Genuine Leather, 3mm Clear Acrylic, and 1 more. Results vary by material batch, focus, and ambient conditions — always test on scrap first.

Is the OMTech Polar compatible with LightBurn?

Yes, the OMTech Polar works natively with LightBurn.

What settings should I use to cut 3mm Baltic Birch Plywood on the OMTech Polar?

A community-tested starting point is speed 18 mm/s, power 72% in a single pass. Enable air assist for a cleaner edge. Always run a test cut on scrap to confirm before committing to your project.

What can a CO₂ laser like the OMTech Polar cut that a diode laser cannot?

CO₂ lasers can cut and engrave clear acrylic, glass (with care), fabric, and thicker wood more cleanly than diode lasers, because the CO₂ wavelength is absorbed by materials that are transparent to diode light. This makes the OMTech Polar more versatile for craft and production use.