How to properly prepare a DXF file for laser cutting
Proper DXF file preparation is key to accurate and cost-effective parts. Learn which layer settings, line widths, and tolerances to use before submitting your order.
DXF (Drawing Exchange Format) is the standard format for exchanging CAD data. In laser cutting, the quality of this file is directly proportional to the quality of the finished part — and its cost.
Layer setup
Use separate layers for cutting contours, engraving, and annotation lines. The cutting layer should have a line width of 0.00 mm (hairline) — any other value may cause incorrect interpretation of the laser path.
Closed contours and duplicates
Every contour must be closed — open ends cause the laser to cut the shape incorrectly. Also check for duplicate lines in the same location: a double cut unnecessarily increases the cost and may damage the material.
Steps before submission
- Check layer settings — cutting on a separate layer
- Make sure all lines are closed contours
- Export in DXF version R12 or R14
- Verify file dimensions against actual part dimensions
- Remove helper lines, dimensions, and annotation text
Minimum dimensions
The smallest hole should have a diameter at least equal to the material thickness. For a 3 mm sheet, the minimum hole is 3 mm. Smaller holes cannot be cut cleanly by the laser.
Conclusion
A properly prepared DXF file saves time and money — it reduces the risk of errors, speeds up quoting, and ensures you get exactly what you designed. If in doubt, contact us before placing your order.
