Key Takeaways

• DXF is a universal vector file format — any laser cutting service accepts it.
• Free tools like Inkscape, FreeCAD, and LibreCAD can create DXF files without cost.
• Draw at 1:1 scale in mm, close all paths, and remove annotation before exporting.
• The most common beginner mistake is open paths — check every outline forms a closed loop.
• Fusion 360 is the best free tool for mechanical parts; Inkscape is best for decorative shapes.

How to Make a DXF File for Laser Cutting: A Beginner's Guide

You have an idea for a custom laser cut part — a bracket, a sign, a screen, or a component. You know laser cutting is the way to get it made. But where do you start? The answer is a DXF file — a vector drawing that tells the laser cutting machine exactly what to cut.

This guide explains what a DXF file is, which software to use (including free options), and the exact steps to create a DXF that any laser cutting service will accept — no engineering degree required.

What is a DXF File?

DXF stands for Drawing Exchange Format. It's a vector file format developed by Autodesk that stores 2D geometry as precise mathematical descriptions of lines, arcs, and curves. Unlike a photo or bitmap, a DXF file has no pixels — just exact coordinates.

When you submit a DXF to a laser cutting service, the machine's software reads the geometry and converts it directly into cutting paths. The laser follows those paths precisely, cutting your part to the exact dimensions in the file.

What Software Can Make DXF Files?

Free Options

• Inkscape (free, all platforms) — Best for decorative shapes, signs, and non-mechanical parts. Draw using the pen/bezier tool, then export to DXF. Note: Inkscape is a design tool, not an engineering CAD tool, so it lacks precise dimensioning.
• LibreCAD (free, all platforms) — A purpose-built 2D CAD program that works similarly to AutoCAD. Good for precise mechanical drawings. Native DXF support.
• FreeCAD (free, all platforms) — 3D CAD software with a 2D drafting mode. More powerful than LibreCAD but with a steeper learning curve.
• Fusion 360 (free for hobbyists and startups) — Autodesk's professional CAD/CAM tool. The most capable free option for precision mechanical parts. Exports DXF directly from sketches.

Paid Options

• AutoCAD — Industry standard 2D/3D CAD. Excellent DXF support (it's Autodesk's own format).
• SolidWorks — Professional 3D CAD used in engineering. Exports flat pattern DXF from sheet metal parts.
• Rhino — Favoured by architects and industrial designers. Excellent for complex curves.

Step-by-Step: Creating a DXF in Fusion 360 (Recommended)

Fusion 360 is the best starting point for anyone new to CAD who wants professional results:

1. Create a new sketch. Go to Sketch > New Sketch, select the XY plane.
2. Set units to mm. Go to File > Document Settings > Units and set to Millimetres.
3. Draw your part outline. Use Line, Arc, Circle, and Rectangle tools. All sketch dimensions are in mm.
4. Add dimensions. Use the Sketch Dimension tool (D) to set exact sizes. This ensures your part is exactly the right size.
5. Close all profiles. Every outline must be a fully closed loop — no gaps between line ends.
6. Export as DXF. Right-click the sketch in the browser > Save As DXF.

Step-by-Step: Creating a DXF in Inkscape (For Decorative Shapes)

1. Set document units to mm. File > Document Properties > set units to mm.
2. Set document size. Use a size that contains your part (e.g. 200x200mm).
3. Draw your shape. Use the Pen/Bezier tool for freehand shapes, or the Rectangle/Circle tools for geometric forms.
4. Convert text to paths. If your design includes text, select it and go to Path > Object to Path before exporting.
5. Export as DXF. File > Save As > Desktop Cutting Plotter (DXF R14).

Common Mistakes to Avoid

• Open paths: If your outline isn't fully closed, the laser won't know where to start and stop cutting. Use your CAD tool's path-closing function or check visually by zooming in to each corner.
• Wrong scale: Ensure your file is 1:1 in mm. Don't scale or resize after export.
• Duplicate lines: Double-drawn lines cause the laser to cut twice, wasting time and potentially burning the material. Delete any duplicates.
• 3D geometry: DXF for laser cutting must be flat 2D. If you're using 3D CAD, export only the flat 2D sketch, not the 3D model.
• Hidden layers: All cut lines should be on a visible layer. Remove construction lines, reference geometry, and annotation before exporting.

Checking Your DXF Before Submitting

Before uploading to Ferracut or any laser cutting service:

• Open the DXF in a viewer (most CAD tools can open DXF files)
• Confirm all outlines are closed
• Check dimensions look correct — a 100mm wide part should appear 100mm wide
• Remove any elements that aren't part lines (dimensions, title blocks, text annotations)

Get Your Parts Cut Today

Once your DXF is ready, upload it to Ferracut for an instant quote. Select your material and thickness, and receive a price in under 30 seconds. No minimum order, Australia-wide delivery.