Beginner's Guide to LightBurn — First Cut in 30 Minutes

You just bought a laser cutter, downloaded LightBurn, opened the software, and the empty grey workspace stares back at you like a math test you didn’t study for. Don’t panic — LightBurn is straightforward once you understand its 4 core concepts. This guide takes you from “what do I click first” to “first successful cut” in 30 minutes.

What you’ll need:

• LightBurn installed (works on Windows, macOS, Linux — free 30-day trial available)
• Your laser cutter connected and powered on
• A DXF or SVG file (we’ll use a free DXFForge sample — comes with 5 designs ready to cut)
• A scrap piece of material (3mm plywood for first cut is ideal)

Let’s go.

Minute 0-5 — Initial setup

Open LightBurn. First screen asks you to add a new device.

1. Click Devices → New Device Wizard
2. Choose your machine type:
   • Fiber laser: typically uses Ruida controller or proprietary controller
   • CO2 laser: typically uses GRBL or Ruida
   • Diode laser (xTool, Ortur, Atomstack): GRBL
3. Choose connection: USB or Ethernet (depends on your machine)
4. Set bed size — usually printed on your machine specs (e.g., 600×400 mm)
5. Set origin location — most machines: front-left

Test connection. Click the Move tab (bottom right). Click an arrow button — your laser head should move 10mm. If it moves, you’re connected. If it doesn’t, recheck cables.

Minute 5-10 — Understanding the workspace

LightBurn has 4 panels you’ll use constantly:

Top — Toolbar. Save, open, undo, zoom. Standard stuff.

Left — Tool palette. Rectangle, ellipse, line, text, image trace. You’ll use these to create new geometry. For now, ignore them — we’re importing existing DXFs.

Bottom-right — Cut/Layers panel. This is where the magic happens. Every “layer” in LightBurn = one operation type (cut, score, engrave). Each colour you assign to geometry becomes a separate layer with its own settings.

Bottom-left — Move/Console panel. Move tab controls laser head position. Console shows machine communication.

Minute 10-15 — Import your first DXF

1. File → Import (or drag-and-drop DXF into workspace)
2. Choose your DXF file — let’s use abs-01.dxf from the free DXFForge sample pack
3. The design appears in the workspace

Check the size. Click the design (it highlights), look at the Selection info panel on the right side. Should show width × height in mm (e.g., 300 × 600 mm).

If size looks wrong (e.g., 11.8 × 23.6 — those are inches): go to Settings → Display → Units and set to mm.

Position the design. Click and drag to move. The bed background grid helps align — typical placement is centred or in the upper-left of your bed area.

Minute 15-20 — Set up your cutting layer

Click the design to select it. Look at the bottom-right colour palette. The current colour (probably Black 00) is highlighted.

In the Cut/Layers panel above the colour palette, you see a single layer entry: “C00” (= colour 00 = black). Double-click it to open the layer settings.

Set these values (for 3mm plywood as a starting point):

Setting	Value	What it means
Mode	Line	Cut along the path (vs Fill for engraving)
Speed	8 mm/s	How fast the head moves
Power max	80%	Laser intensity
Power min	20%	Lower for corner deceleration
Number of passes	1	How many times to repeat the cut
Z step per pass	0	Don’t lower table between passes
Air assist	On	If your machine has it

Click OK.

For DIFFERENT material/thickness, the settings vary. Quick starting points:

Material	Speed	Power	Passes
3mm plywood	8 mm/s	80%	1
3mm MDF	10 mm/s	80%	1
3mm acrylic	12 mm/s	65%	1
6mm plywood	6 mm/s	90%	1
1mm cardboard	50 mm/s	30%	1

These work for typical 40-80W CO2 lasers. For fiber laser on metal, settings are different — see our fiber laser settings guide for that.

Minute 20-25 — Pre-flight checklist (don’t skip this)

Before clicking Start, run this checklist. 60 seconds of checking saves an hour of debugging.

Material:

• Material lies flat on bed (no warps)
• Material extends beyond cut area by 5+ mm
• Surface is clean (no dust = no flame-up)

Machine:

• Air assist running (you hear it)
• Exhaust fan on (you feel airflow)
• Water chiller running (CO2 lasers — usually a separate device)
• No tools/clamps in head’s path

Software:

• Selection in correct position relative to machine origin
• Layer settings configured (Speed/Power/Passes)
• Number of objects matches expectation (Cut Files panel)

Safety:

• Fire extinguisher within arm’s reach
• Laser safety glasses on (especially for fiber + diode lasers)
• You can see the machine the whole time

Now you’re ready.

Minute 25-30 — Frame, then cut

Frame first. Click the Frame button (bottom-left toolbar). The laser head traces a rectangular outline of where the cut will happen WITHOUT firing the laser. This confirms positioning.

If the frame looks right (going where you expected on the material), proceed. If not, adjust position in workspace and Frame again.

Start the cut. Click Start (bottom-right). Watch the head start moving and cutting.

Stay watching. Don’t walk away from your first cut. Watch for:

• Excessive flames (= too slow or too much power — emergency stop, reduce power)
• Wood charring excessively (= too slow — increase speed)
• Cut not going all the way through (= too fast or too little power — increase power or reduce speed for next pass)
• Smoke not being cleared (= air assist or exhaust problem)

Cut completes. Head returns to origin position. Lift the material — your cut piece should fall out.

Did it cut all the way through?

Three possible outcomes:

A) Yes, clean cut, falls out: Congratulations. Repeat at this setting for production. Take notes on Speed/Power that worked.

B) Almost — slight tab holding it: Add ~5% power or reduce speed by ~1 mm/s for next attempt. Or increase passes from 1 to 2.

C) Surface scorched, barely a line: Too much power for too long. Increase speed dramatically (try 15-20 mm/s) or reduce power to 50%.

Run a small test piece — say, a 50mm square cut from your DXF — to dial in settings before running a large expensive job.

Saving your settings

Once you have working settings for a material, save them:

1. File → Save material settings OR right-click layer → Save to material library
2. Name it: “3mm plywood — 80W CO2”
3. Next time you cut plywood, recall this settings preset in one click

Build your library over the first few weeks. After 30-50 cuts you’ll have presets for every material you commonly use.

Common LightBurn mistakes (and fixes)

“My DXF imported and I see lines but nothing is selected to cut.” → Your DXF used colour layers that aren’t recognised. Select all (Ctrl+A), then click a colour in the bottom palette. All objects get assigned to that layer.

“The cut starts in the middle of the path.” → Check Cut Settings → Optimization → “Start point inside cuts”. Set to “Optimize start points” for cleaner results.

“My design is mirrored on the material.” → Your machine origin is set wrong. Edit → Device Settings → Origin — typically should match your physical machine’s home position (front-left for most CO2, varies for fiber).

“Lines are dotted instead of solid.” → Wrong cut mode. Open layer settings → Mode should be Line, not Fill or Image.

“Two cuts going over the same line.” → Duplicate geometry in your DXF. Edit → Delete duplicates removes overlapping paths.

Next steps after your first cut

You’ve successfully cut. Now scale up:

1. Try different DXF files — every DXFForge design is pre-tested for clean LightBurn import
2. Try different materials — acrylic, MDF, leather, cardboard each behave differently
3. Try engraving — set layer Mode to Fill instead of Line; uses different settings (faster speed, lower power)
4. Learn cut optimization — Cut Order panel lets you control which paths cut first (internal before external = best practice)

Where to get cut-ready DXF files

Every file in the DXFForge catalogue ships with:

• ✓ Closed paths (no broken lines)
• ✓ 0.1 mm kerf offset baked in
• ✓ Named layers (CUT vs ENGRAVE)
• ✓ Reference 100mm square for size verification
• ✓ Internal cuts before external (correct cut order)

You can grab 5 free samples to practice. Or for production work, the Full Access Bundle gives 108+ designs for $49.99 one-time.

TL;DR

Time	Action
0-5 min	Set up device in LightBurn
5-10 min	Learn the workspace
10-15 min	Import DXF, check size, position
15-20 min	Configure layer (speed/power/passes)
20-25 min	Pre-flight checklist
25-30 min	Frame, cut, observe result

You’ve made your first laser cut. Welcome to the hobby that will absorb every free hour you have.