Export Gerber files from Eagle

Exporting Gerber files from Autodesk Eagle is a key step before starting PCB Manufacturing and PCB Assembly. Gerber files contain all the necessary data for fabricating your PCB, including copper layers, solder mask, silkscreen, and drill information.

Below is a step-by-step guide to help you correctly generate Gerber files for SMT Assembly and production.

Open your PCB design

Start by opening your completed board file (.brd) in Autodesk Eagle. Make sure your design is finalized and all components are properly placed and routed.

It’s recommended to run a Design Rule Check (DRC) before exporting to ensure there are no layout errors that could affect PCB Assembly.

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Open the CAM processor

In the top menu, go to
File → CAM Processor

The CAM Processor is the tool used to generate Gerber files for PCB Manufacturing. It allows you to select layers and configure output settings.

Load a CAM job file

Eagle usually includes default CAM job files.

Click File → Open → Job, then select a standard job such as:
gerber.cam

This will automatically load predefined settings for common Gerber outputs, suitable for most PCB Assembly requirements.

Configure Gerber layers

Ensure the correct layers are selected for export. Typical layers include:

• Top Copper (Top)
• Bottom Copper (Bottom)
• Solder Mask Top/Bottom
• Silkscreen Top/Bottom
• Board Outline (Dimension layer)

For SMT Assembly, accurate solder mask and silkscreen layers are especially important.

Set output format

Make sure the output format is set correctly:

• Format: RS-274X (standard Gerber format)
• Units: mm or inch (match your design settings)
• Resolution: usually 2:5 or 2:6

These settings ensure compatibility with most PCB Manufacturing suppliers.

Generate Gerber files

Click the Process Job button.

Eagle will generate a set of Gerber files, typically including:

• .GTL (Top Layer)
• .GBL (Bottom Layer)
• .GTS / .GBS (Solder Mask)
• .GTO / .GBO (Silkscreen)
• .GKO or .GML (Board Outline)

These files are essential for both fabrication and PCB Assembly.

Export drill files

Gerber files do not include drill data, so you must export it separately.

Go to:
File → CAM Processor → Drill data (Excellon format)

This file contains hole sizes and locations, which are critical for PCB Manufacturing.

Verify Gerber files

Before sending files to your manufacturer, always verify them using a Gerber viewer.

Check that:

• All layers are aligned correctly
• Board outline is accurate
• No missing pads or traces
• Text and markings appear properly

This step helps prevent costly errors in PCB Assembly.

Package files for submission

Finally, compress all Gerber and drill files into a single ZIP archive.

Include:

• Gerber files
• Drill file
• Readme or notes (if needed)

You can now send this package to your PCB Manufacturing or PCB Assembly supplier for quotation and production.

Conclusion

Exporting Gerber files from Autodesk Eagle is a straightforward process when using the CAM Processor with the correct settings. Proper file preparation ensures smooth SMT Assembly, reduces manufacturing errors, and speeds up your project timeline.

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