Is it possible to export a 1:1 scale DXF for laser cutting in Autodesk Fusion?
Short Answer
Yes — in Autodesk Fusion, you can export a 1:1 scale DXF for laser cutting using the Save as DXF method from a flat sketch or flat pattern. This is the most common professional workflow because DXF geometry is exported at true size. Limitation: model faces do not always produce clean cut-ready contours.
What You Need to Know Before
Warning: If you export from the wrong sketch, projected edges, construction geometry, or duplicate profiles can end up in the DXF and cause laser operators to get double-cut paths. Also, sheet metal parts should usually be exported from the flat pattern, not the folded model.
How to Export a 1:1 Scale DXF
Command: Save as DXF
Shortcut: None
Quick Steps:
- Create or identify the final 2D cut profile in a sketch, or create a sheet metal flat pattern first if the part is bent.
- In the Browser, right-click the sketch name or the Flat Pattern node, then click Save as DXF.
- Save the file and verify in your laser software that units are interpreted correctly and that the geometry opens at 1:1 scale.
Variables & Settings
Key Setting: DXF source selection
Expert Setting: Exporting from a clean sketch gives the best control for laser cutting. For bent parts, exporting the Flat Pattern is the correct option because it reflects the developed shape, not the formed geometry. Before export, turn off or remove construction lines and unnecessary projected entities.
Why it Fails
Cause 1 (Geometry): Open profiles, overlapping lines, splines, or duplicate projected edges can create unusable laser paths.
Cause 2 (layers/Locks): Hidden or reference sketch geometry may still be included in the DXF, depending on how the sketch was built and cleaned.
Cause 3 (Command/Logic): Exporting a face or sketch from the folded model instead of the flat pattern can produce the wrong size or wrong shape for formed sheet metal parts.
Quick Fix & Best Practice
Quick Fix: Edit the sketch, delete duplicate entities, convert splines to simpler geometry if required by the machine, then right-click the final sketch or Flat Pattern and use Save as DXF again.
Manager’s Verdict: Use Save as DXF from a finished sketch for flat parts and from the flat pattern for sheet metal. Avoid exporting directly from arbitrary model edges when the file is intended for production laser cutting.
FAQ
Does fusion export DXF in real size?
Yes, dxf export is normally 1:1 if units are interpreted correctly downstream.
Should I export a sketch or a face for laser cutting?
A clean sketch is usually better, and a flat pattern is best for sheet metal.
Why does my DXF look scaled in another program?
The receiving software may be reading the units incorrectly.
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