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Export GenCAD

An EasyEDA Pro extension that exports PCB designs to GenCAD (.cad) file format for PCB manufacturing and test data exchange.

Features

• Exports PCB to GenCAD 1.4 standard format
• Parses footprint source data (elibz2/elibu format) for accurate pad geometry and silkscreen outlines
• Supports native GenCAD CIRCLE and ARC commands (not approximated with line segments)
• Handles pad rotation angles correctly
• Outputs TEXT (Designator/Value) with original PCB attributes: coordinates, rotation, mirror, font size
• Caches footprint data to avoid redundant parsing
• Exports board outline (supports Polyline, Fill, and Line sources)
• Exports pad stack definitions with automatic deduplication
• Exports complete component, pin, net, trace, and via information
• Automatic coordinate conversion: EasyEDA internal units (mil) to inches

Usage

1. Open a PCB document in EasyEDA Pro
2. Click the PCB header menu Export GenCAD → Export GenCAD (.cad)...
3. The .cad file will be generated and downloaded automatically
4. The.cad file you can preview atOnline GernCAD Viewer

Output Format

The generated .cad file follows the GenCAD 1.4 format specification with the following sections:

Project Structure

src/
├── index.ts               # Main logic: data collection, GenCAD generation, file export
├── footprintParser.ts     # Parses elibz2/elibu footprint files (ZIP + JSON)
└── footprintExtractor.ts  # Extracts pad and silkscreen data from parsed primitives

Development

npm install
npm run compile   # Compile TypeScript and bundle to dist/
npm run build     # Compile + package as .eext extension

Other commands:

npm run lint      # ESLint check
npm run fix       # ESLint auto-fix

Tech Stack

• TypeScript
• esbuild (bundling)
• JSZip (parsing footprint ZIP archives)
• @jlceda/pro-api-types (EasyEDA Pro extension API types)

Requirements

• Node.js >= 20.17.0
• EasyEDA Pro >= 3.2.0

License

Apache License 2.0