Laser software and settings: speed, power and the material test
The laser is hardware; the software decides what comes out of it. Most machines ship with a basic program and are used with LightBurn, and the difference between a clean job and a burnt one is usually in the settings, not the machine.
What the software does
It imports vector or raster artwork, arranges it on the bed, assigns speed and power per layer, and sends the job to the controller. Good software also stores material presets and previews the path.
The settings that matter
| Setting | Effect |
|---|---|
| Speed | How fast the head travels; slower means more energy per mm |
| Power | Energy output as a percentage of maximum |
| Passes | Repeats the path; useful for thick material |
| Line interval | Distance between raster lines; finer means darker but slower |
| Focus | Spot size at the surface; wrong focus means wide, weak lines |
LightBurn and the alternatives
LightBurn supports most hobby controllers and adds layers, camera alignment, material libraries and a preview that shows estimated time. It is paid software, and it is the de facto standard for diode and CO2 machines.
Fiber machines often use EZCAD or the manufacturer’s own tool, with their own parameter files. Check that the machine is supported before buying software.
Building a material test
Do not guess settings. Engrave a grid of small squares at different speed and power combinations, label them, and keep the test piece next to the machine. Ten minutes of testing saves hours of ruined stock, and every new material needs its own grid.
Frequently asked questions
Do I need LightBurn?
No, but it is usually better than the bundled software. Check controller compatibility first.
Can I use Inkscape or Illustrator?
Yes for design: export SVG or DXF and import into the laser software.
Why does the same file burn differently on another machine?
Power, focus, speed calibration and tube condition all differ. Settings do not transfer between machines without testing.
What is the dot width in the preview?
It simulates how thick each raster line will be. Adjusting it changes the preview, not the machine.
How do I align repeated jobs?
A fixed jig or a camera. For production, a jig is faster and more reliable.
The short version
Learn three settings — speed, power, passes — and run a material test for every new stock. The software is where quality is won or lost, not the wattage.
Workflow that avoids ruined stock
Design in vector where possible: SVG or DXF imports cleanly and scales without pixelation. Convert text to paths before export, or the laser software may substitute a font it does not have.
Then preview the path, check the estimated time, and run the job on scrap of the same material. The difference between a good result and a burnt one is usually one test piece, not one setting.
Keeping records
Save the settings with the file: material, thickness, speed, power, passes, focus height. Six months later the same job will be a five-minute repeat instead of an hour of guessing, and the notes are the only thing that carries between machines.