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Cedar wood laser cutting and engraving settings (diode lasers, 2026)

For a 20W diode laser, engrave aromatic cedar at 48% power, 3,500 mm/min (58 mm/s), 1 pass. Cut 3mm cedar at 72% power, 1,000 mm/min (16.7 mm/s), 2 passes with air assist. Cedar's natural aromatic oils mean more resin smoke than basswood — apply masking tape before engraving to prevent resin deposits on the surrounding wood. These are calibrated starting points from community-tested data; confirm with a test square before engraving a finished piece. Last verified: 2026-07-06.

  • 20W engrave: 48% · 3,500 mm/min · 1 pass
  • 40W engrave: 30% · 5,000 mm/min · 1 pass
  • 20W cut (3mm): 72% · 1,000 mm/min · 2 passes
  • Key tip: masking tape before engraving — cedar resin stains surrounding wood

Cedar resin smoke — why masking tape matters more here than with basswood

Always use ventilation. Cedar contains aromatic compounds — thujaplicins, terpenes, and volatile oils — that vaporise when heated. The smoke smells pleasant but is irritating to airways and eyes. Use ducted ventilation to the outdoors or a laser-grade fume extractor. Never laser pressure-treated cedar or outdoor construction lumber — preservatives are toxic.

Cedar is a naturally aromatic wood. Its cells are saturated with volatile oils that give cedar its characteristic smell — the same oils that make it a natural moth repellent in closets and chests. When the laser hits cedar, those oils vaporise and travel outward from the beam. Some re-condense on the cool wood surface around the engraved area, leaving a yellowish-brown resin stain.

The solution is simple: apply blue painter's tape or dedicated laser masking tape to the entire surface you're engraving before you start. The tape catches the condensing oils; when you peel it away after engraving, the surrounding surface stays clean. On basswood you can often skip masking tape; on cedar it makes a noticeable difference to the final result.

For cutting, air assist is essential — it blows the resin smoke away from the kerf, prevents re-deposition in the cut channel, and reduces flare-up risk. Cedar cuts more cleanly with air assist than without, because resin can otherwise burn back into the kerf between passes and reduce beam efficiency.

Never laser these cedar products: pressure-treated cedar decking or fencing (preservatives contain toxic compounds), cedar products that have been stained or painted (unknown chemistry in the coating), or reclaimed cedar from industrial or outdoor structures.

Starting settings: engraving cedar on a 20W diode laser

20W optical — Ortur LM3 20W · xTool D1 Pro 20W · Sculpfun S30 Pro

48% power
3,500 mm/min (58 mm/s)
1 pass
off air assist

LTEI: 0.00165 J/mm. Source: BonnyCreations Ortur LM3 community data (2026). Confidence: medium.

Cedar engraves at a similar energy level to basswood — the aromatic oils don't significantly change how well the wood absorbs the 450nm laser beam. What changes is what happens to the smoke. Expect a warm medium-brown engraving mark with good contrast. The natural oil content often gives cedar engravings a slightly richer, darker character than basswood at the same settings.

Tip for better contrast: reduce speed by 10–15% for darker marks, or increase DPI from 254 to 300 for denser coverage on fine text. Cedar's grain is straight and tight, so it holds fine detail well.

What power and speed engraves cedar with a diode laser?

Both community test results cross-validate well: the 20W and 40W Laser Tinkerer Energy Index values agree within 13%, confirming the settings are proportional and transferable across wattages.

Wattage Example machine Power Speed mm/min Speed mm/s Passes LTEI J/mm Confidence Source
10W xTool D1 Pro 10W, Sculpfun S10 65% 2,500 41.7 1 0.00156 low (calc.) LTEI-derived from 20W + 40W anchors — estimated, unverified. Confirm with a test grid.
20W Ortur LM3 20W, xTool D1 Pro 20W 48% 3,500 58.3 1 0.00165 medium BonnyCreations Ortur LM3
40W xTool S1 40W 30% 5,000 83.3 1 0.00144 medium BonnyCreations xTool S1

LTEI = Laser Tinkerer Energy Index = (power_frac × wattage_optical × 0.6) / speed_mm_min. See the normalization methodology.

Derived row (10W) is an unverified estimate — always confirm with a test grid before engraving a finished piece.

What power and speed cuts 3mm cedar with a diode laser?

Cedar cuts more easily than birch or oak due to its lower density. A 20W machine cuts 3mm aromatic cedar in 2 passes; a 40W can do it in one. The LTEI values differ between the two real data points, which reflects different approaches — the 40W setting optimises for a clean single-pass cut (higher energy per pass), while the 20W setting splits the work over two lighter passes. Both work on 3mm material.

Wattage Example machine Power Speed mm/min Speed mm/s Passes Air assist LTEI J/mm Confidence Source
10W xTool D1 Pro 10W, Sculpfun S10 100% 500 8.3 2–3 Yes (required) 0.012 low (calc.) LTEI-derived from 20W anchor — estimated, unverified. Confirm with a test grid.
20W Ortur LM3 20W, xTool D1 Pro 20W 72% 1,000 16.7 2 Yes (required) 0.00864 medium BonnyCreations Ortur LM3
40W xTool S1 40W 90% 550 9.2 1 Yes (required) 0.039 medium BonnyCreations xTool S1

Derived row (10W) is an unverified estimate — always confirm with a test grid. Air assist is required for all cedar cutting to manage resin smoke and prevent kerf re-deposition.

Energy heatmap — cedar engraving (20W reference machine)

Power × speed energy map — cedar engraving (20W) POWER % → ↓ SPEED (mm/min) 30% 40% 50% 60% 70% 2000 3000 3500 5000 SWEET ~48·3500 too cool → no mark too hot → char
Energy density heatmap for cedar engraving — 20W diode, powers 30–70%, speeds 2,000–5,000 mm/min. Ringed cell: ~50% at 3,500 mm/min (LTEI 0.00171 J/mm), closest grid point to the community-tested 48% at 3,500 mm/min. Low energy at 5,000 mm/min (bottom row) produces faint marks; high power at 2,000 mm/min (top row) risks over-burning cedar's soft grain.

Cedar types, masking tape, and technique tips

Which type of cedar can I laser engrave?

Two cedar species dominate the laser craft market:

  • Eastern aromatic cedar (Juniperus virginiana) — the reddish-brown wood sold as closet liner strips and small craft boards. High resin content, very strong scent, relatively soft. Most widely available in craft sizes. Lasers beautifully but has the most resin smoke.
  • Western red cedar (Thuja plicata) — sold as shingles, siding, and outdoor craft planks. Slightly less dense, still aromatic, engraves with more visible grain lines due to its wider growth rings.

Both laser well with similar settings. The key rule for both: only untreated craft boards, never construction lumber or pressure-treated products.

Masking tape before engraving

Apply blue painter's tape to the entire area you intend to engrave before starting. Cedar's oils volatilise under the beam and re-condense on the surrounding cool surface, creating a yellowish stain ring around each engraved element. The tape blocks this. After engraving, peel slowly at a low angle. If you're engraving detail text, lift a corner to check the result is sharp before removing the whole tape.

Contrast and grain direction

Cedar's characteristic reddish-brown heartwood contrasts differently from its pale sapwood. On boards that include both, the laser mark will appear lighter on the sapwood and darker on the heartwood, creating an uneven appearance on detailed engravings. For consistent results, choose boards with a uniform heartwood face, or orient your design to work with the grain colour variation as a feature.

When to use air assist for engraving

Turn air assist off for raster engraving on cedar. Air flow scatters the resin smoke sideways and can cause uneven deposition around the engraving zone. The one exception: if you're engraving very close to the edge of the board and concerned about smoke staining the surrounding area, a very light air flow can help — but start with no air assist and assess the result first.

Quoted result — Laser Tinkerer, July 2026: "Cedar engraves at LTEI 0.00155 J/mm — near-identical to basswood — confirming that the aromatic oils don't significantly change 450nm beam absorption. The smoke is different; the settings are similar. Source: cross-machine validation (Ortur LM3 20W + xTool S1 40W, BonnyCreations)."

Frequently asked questions — cedar laser settings

What settings should I use to engrave cedar with a 10W diode laser?

Start at 65% power, 2,500 mm/min, 1 pass. This is a LTEI-derived estimate (LTEI 0.00156 J/mm) — always confirm with a test grid on your specific cedar board before engraving a finished piece. Apply masking tape first, air assist off.

Can a 10W diode laser cut cedar?

Yes — cedar is a relatively soft wood and a 10W machine can cut 3mm aromatic cedar. Start at 100% power, 500 mm/min, 2–3 passes with air assist. This is a derived estimate; verify with a test cut. Cedar cuts faster than pine or birch plywood at the same wattage because of its lower density.

Why does my cedar engraving have a resin stain around it?

Cedar's natural oils vaporise under the beam and re-condense on surrounding wood. The fix is masking tape applied before engraving — peel it away after. This is more pronounced on cedar than on basswood or birch, so don't skip the masking step.

Is it safe to laser cedar?

Yes — with ventilation. Aromatic cedar smoke is irritating but not acutely toxic (for untreated wood). Use ducted ventilation or a fume extractor. Never laser pressure-treated cedar; never laser outdoor construction cedar with unknown preservatives.

What is the difference between aromatic cedar and red cedar for laser engraving?

Eastern aromatic cedar is the red-brown closet-liner wood — smaller boards, very high resin. Western red cedar is the larger outdoor timber — similar but with wider grain lines. Both laser well at similar settings. Choose aromatic cedar craft boards for projects; both need masking tape.

Recommended gear for laser engraving and cutting cedar

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