Convert PDF to GERBER

Understanding PDF and Gerber file formats

PDF (Portable Document Format) is a widely used file format developed by Adobe for presenting documents, including text and images, in a manner independent of application software, hardware, and operating systems. PDFs are commonly used for sharing schematics, PCB layouts, and technical drawings in the electronics industry.

Gerber files are the standard file format for PCB (Printed Circuit Board) manufacturing. They describe the copper layers, solder mask, legend, and other details required for fabricating a PCB. Gerber files are essential for communicating design intent to PCB manufacturers.

Why convert PDF to Gerber?

Sometimes, PCB designs are only available as PDF documents, especially when shared for review or legacy projects. To manufacture a PCB, you need Gerber files, not PDFs. Converting a PDF to Gerber allows you to recreate the PCB layout for fabrication.

How to convert PDF to Gerber

Direct conversion from PDF to Gerber is not straightforward, as PDF is not a CAD format. The process typically involves:

1. Extracting the PCB layout from the PDF as a vector image (such as DXF or SVG).
2. Importing the vector file into a PCB design tool.
3. Reconstructing the PCB layers and features.
4. Exporting the design as Gerber files.

Recommended software for PDF to Gerber conversion

• Inkscape: Use Inkscape to open the PDF and save it as a DXF file.
• KiCad: Import the DXF file into KiCad's PCB editor, reconstruct the layers, and export Gerber files via File → Plot.
• Altium Designer: Import the vector file and use File → Fabrication Outputs → Gerber Files to generate Gerbers.
• EasyEDA: Online tool that allows importing images or DXF and exporting Gerber files.

Step-by-step conversion example using Inkscape and KiCad

1. Open your PDF in Inkscape.
2. Save the relevant page or layer as a DXF file (File → Save As → Desktop Cutting Plotter (AutoCAD DXF)).
3. Open KiCad and create a new PCB project.
4. Import the DXF file into the PCB editor (File → Import → Graphics).
5. Recreate the necessary PCB features (pads, vias, tracks) as needed.
6. Export Gerber files via File → Plot.

Tips and considerations

• Manual editing is often required to ensure accuracy.
• Check scaling and alignment after importing the vector file.
• Verify the final Gerber files with a Gerber viewer before sending to manufacturing.

Conclusion

While converting PDF to Gerber is not a one-click process, using tools like Inkscape and KiCad makes it achievable. Always verify your output to ensure the PCB will be manufactured correctly.