Basswood Engraving Settings (5W–40W Diode Lasers)
Basswood is the best all-around engraving wood for diode lasers — light-colored, tight-grained, and low-resin. On a 20W machine, start with 6,000 mm/min at 55% power for logo and text engraving. Photo engraving calls for slightly higher energy at slower speed. Both modes are covered below with settings across the 5W–40W range, calibrated from community-tested starting points.
Why Basswood Engraves Better Than Most Woods
Basswood has three properties that make it ideal for diode laser engraving. First, it's very light in color — the contrast between the natural wood and the char mark is one of the highest of any common wood. Second, the grain is very tight and consistent with almost no resin channels, which means the laser chars uniformly rather than burning faster along grain lines. Third, it's widely available in hobby sizes (3mm, 6mm sheets; craft blanks for ornaments, bottle openers, signs) at relatively low cost.
Grain direction matters slightly for engraving quality: engraving across the grain produces a cleaner mark than engraving along it, because the tool crosses through the growth rings rather than running parallel to the alternating hard and soft grain zones. Rotate your design 90° if you notice the mark is inconsistent in one direction.
Logo and Text Engraving Settings
Use these settings for vector engraving, logos, names, and bold text — anything that's single-pass, solid-fill. DPI of 254 lpi (lines per inch) is the standard starting point; some users prefer 300 lpi for finer text. Source: Bonny Creations xTool D1 Pro 20W settings library (blog post) for the 20W anchor values; Zapcraft basswood engraving guide (zapcraft.net) for 10W corroboration; other wattages normalized using the energy index formula.
| Machine class | Speed (mm/min) | Speed (mm/s) | Power % | Passes | EI (J/mm) | DPI | Source |
|---|---|---|---|---|---|---|---|
| 5W | 1,500 | 25.0 | 55% | 1 | 0.110 | 254 | Derived (20W) |
| 10W | 3,000 | 50.0 | 55% | 1 | 0.110 | 254 | Derived (20W); within Zapcraft 2,200–5,000 mm/min range |
| 20W | 6,000 | 100.0 | 55% | 1 | 0.110 | 254 | Bonny Creations D1 Pro 20W |
| 33W | 6,000 | 100.0 | 33% | 1 | 0.099 | 254 | Derived (Rule 1 from 20W) |
| 40W | 6,000 | 100.0 | 28% | 1 | 0.101 | 254 | Derived (Rule 1 from 20W) |
Photo and Detail Engraving Settings
Photo engraving requires slightly more energy per pass (higher EI) to produce the full range of grey tones. You'll also switch from a solid fill to a dithering algorithm — Floyd-Steinberg or Stucki are the most common choices in LightBurn. Higher DPI (300–508 lpi) is used for photo work to capture fine detail. Source: Bonny Creations D1 Pro 20W for the 20W anchor (4,500 mm/min, 45%, 1 pass); other wattages normalized.
| Machine class | Speed (mm/min) | Speed (mm/s) | Power % | Passes | EI (J/mm) | DPI | Dither mode |
|---|---|---|---|---|---|---|---|
| 5W | 1,100 | 18.3 | 45% | 1 | 0.123 | 254–300 | Floyd-Steinberg or Jarvis |
| 10W | 2,250 | 37.5 | 45% | 1 | 0.120 | 254–300 | Floyd-Steinberg or Jarvis |
| 20W | 4,500 | 75.0 | 45% | 1 | 0.120 | 254–300 | Floyd-Steinberg or Jarvis |
| 33W | 4,500 | 75.0 | 27% | 1 | 0.121 | 254–300 | Floyd-Steinberg or Jarvis |
| 40W | 4,500 | 75.0 | 22% | 1 | 0.118 | 254–300 | Floyd-Steinberg or Jarvis |
What the Energy Index Tells You About Engraving
Notice how similar the EI values are across machine classes for both logo (0.099–0.110) and photo mode (0.118–0.123). This near-constant energy index across machines is exactly what the normalization model predicts — engraving operations where you're removing a fixed depth of material tend to be well-approximated by EI. It also means the settings above are a reliable starting point regardless of your machine: if you know a 10W setting works, scaling by the wattage ratio gives you a good 20W or 5W setting.
The slight upward EI trend from 5W to 33W (more energy needed at higher power to achieve the same visual result) reflects beam quality differences: higher-power diode modules often have a slightly larger focal spot, which dilutes the energy density even at the same nominal EI. This is a small second-order effect — start with the table values and use a test grid to refine.
Tips for Better Basswood Engraving Results
Sand before engraving, not after. Run a 220-grit pass over the blank before laser engraving. Scratches and surface roughness scatter the engraved mark. A smooth, uniform surface gives a more consistent, professional-looking result.
Focus precisely. Basswood engraving quality is highly focus-sensitive. Even 0.5mm of focus error noticeably widens the engraved lines and softens fine detail. Use your machine's included focus block, or run a focus test at several heights before cutting production pieces.
Reduce power slightly for fine text. Fine serif fonts and small text engrave better at 5–10% less power than the standard settings above — less char creep at the edges of narrow strokes. Test on a sample before engraving your final piece.
Grain direction for uniform contrast. As noted above, engraving across the grain (laser scan lines perpendicular to the wood grain direction) gives the most uniform marks. For pieces where the grain direction is at 45° to your design, the uniformity difference is less noticeable.
Apply a finish after engraving. Bare basswood absorbs oil and moisture quickly. After engraving, seal with a light coat of wipe-on polyurethane, spray lacquer, or cutting-board oil (for food-contact items). The seal also slightly darkens the engraved area, increasing visual contrast.
Confirm Before You Engrave
Run a material test grid on a scrap piece of the same basswood before your production job. A 3×3 grid centered on the table settings above takes about 10 minutes and removes all guesswork about the right starting point for your specific machine and material batch.