Knowledge
Practical LightBurn guides, settings, testing workflows and troubleshooting — written for real workshop use.
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170 articles
Accurate Job Time: What Estimates Can and Cannot Know
Job-time estimation depends on controller/motion assumptions, acceleration and travel; calibration can improve predictions, but estimates are not guarantees.
Running Multiple LightBurn Instances Safely
Multiple instances can separate projects or machines, but each window must use the intended device/port and configuration to avoid sending a job to the wrong laser.
Quick Nest in LightBurn 2.1
Quick Nest automatically packs selected shapes to use material area more efficiently; nesting is a layout optimization, not a substitute for cut-order and part-holding checks.
LightBurn 2.1 Template Files (.lbt)
Template files open as new unsaved projects and can preserve all cut settings, making them useful for repeatable jobs, workshops and rotary setups without overwriting the master.
Undo History in LightBurn 2.1
LightBurn 2.1 adds a selectable Undo History window on top of its unlimited session undo list, making it easier to jump back to a known project state.
Boolean Assistant: Choose the Geometry Result Visually
Boolean operations depend on shape overlap and selection order; the assistant helps compare possible results before committing.
Lock Shapes to Protect a Finished Layout
Locking prevents accidental movement, resize, rotation or deletion of selected design elements while you continue editing around them.
Select Shapes Smaller Than Selected for Cleanup
This selection tool is useful for cleaning noisy traces/imports or selecting classes of tiny geometry without clicking each object.
Select Circles by Exact Size or Range
LightBurn 2.1 can select circles by exact size or size range, useful for fastener holes and cleanup in complex imported designs.
Nudging Shapes Precisely With the Keyboard
Arrow-key nudging is faster and more repeatable than dragging when you need small positional corrections; modifier keys can change the nudge amount.
Virtual Edits and Symmetric Shape Changes
Virtual-edit style operations can change design behavior without destructively rebuilding every path; understand what remains editable and what becomes final geometry.
Extreme Nodes and Curves That Misbehave
Imported or traced paths can contain extreme control handles or excessive nodes that create spikes, loops or unstable editing.
Trim Shapes: Cutting Vector Geometry Cleanly
Trim removes path portions at intersections without requiring you to manually break every node, but it depends on real path intersections.
Image Banding: Mechanical, Electrical or Processing?
Regular stripes can come from mechanics, power modulation, scan interval interaction or source-image patterns; their spacing is a useful diagnostic clue.
Photo Engraving Test Workflow Before the Final Piece
A small crop containing skin, highlights, shadows and fine detail is more useful for tuning than repeatedly engraving the full photo.
Scan Angle and Crosshatch: When a Second Direction Helps
Changing scan angle can follow material grain or geometry; crosshatch adds another pass direction and therefore more energy/time.
Overscanning and Dark Edges in Raster Engraving
Overscanning lets the head accelerate before firing across the image so the engraved region is closer to commanded scan speed at the edges.
Choosing a Dither: Jarvis, Stucki, Atkinson and More
Dither algorithms distribute black dots differently; the “best” choice depends on image texture, physical resolution, material and laser spot behavior.
Negative Image, Invert and Invert Display
A display inversion can be only a preview aid, while Negative Image changes how pixel brightness maps to output. Understand which operation changes data and which changes only the view.
Isolating a Subject From a Difficult Background
Bright backgrounds, shadows and reflections can compete with the subject in engraving; isolate or mask the important content before tuning laser settings.
Image Preflight: Pixels, Physical Size and Line Interval
A photo can look sharp on screen but have too few pixels for the final engraving size, or far more pixels than the laser can physically reproduce.
Material Test Border: When to Cut the Grid Free
The Material Test border can be used as a separate cut around the test grid, useful when you want a portable labeled sample; it needs its own safe cut setting.
Material Test Presets: Repeat Tests Consistently
Presets reduce setup friction, but a preset is a test definition — not proof that the same result will occur on another laser or material batch.
Reducing Char: Speed, Power, Passes and Airflow
A darker edge can come from excessive heat dwell, poor air evacuation, incorrect focus or too many slow passes; power alone is not the only variable.