Before you start: you need a scrap piece of your target material (at least 100 × 80 mm is comfortable for a 5 × 4 grid), plus either LightBurn (for the SVG) or a direct GRBL connection (LaserGRBL, Candle) for G-code.

Configure Your Test Grid

Machine

Material

Power Axis — columns (X)

Min %

Max %

Steps

Speed Axis — rows (Y, mm/min)

Min

Max

Steps

Cell size (mm) 15–25 mm is typical.

Preview & Download

Set your machine and material to generate the preview.

Power mode M4 scales laser power with actual speed — prevents corner over-burn. Requires $32=1 in GRBL.

Confirm $32=1 is set, jog to front-left corner of your material and set work origin, then run a dry framing pass before the real job.

Free tool by lasertinkerer.com — see full instructions