Personal CAD projects designed with OpenSCAD and sliced with Orca Slicer.

Each project is in its own subdirectory under projects/:

• rack - 1U rack shelf device mounts (Apple TV mount, retention strap, WiiM Amp bracket)

# Clone with submodules git clone --recurse-submodules https://github.com/shirhatti/cad.git cd cad # Or initialize submodules after cloning git submodule update --init --depth 1 # Optional: Enter Nix development environment nix develop # Build all projects just build # Check syntax just check # Render and slice specific project just render rack__rack_shelf_apple_tv_mount just slice rack__rack_shelf_apple_tv_mount

• just build - Render all .scad files to STL
• just render <name> - Render a specific file with timestamp
• just gui <name> - Open file in OpenSCAD GUI
• just preview <name> - Generate PNG preview
• just check - Syntax check all files
• just clean - Remove build artifacts

• just slice <name> - Slice STL to 3MF with embedded G-code
• just open-slice <name> - Open sliced 3MF in Orca Slicer
• just prepare <name> - Full workflow: render → slice → open

• just watch - Auto-rebuild all files on changes
• just watch-file <name> - Auto-rebuild specific file

1. Create project directory in projects/<project-name>/
2. Add .scad files and project README
3. Run just build to render STL files
4. Run just slice <project>__<model> to generate G-code

Printer profiles are loaded from the .orca-slicer git submodule (OrcaSlicer upstream). Default settings:

• Printer: Bambu Lab A1 (0.4mm nozzle)
• Process: 0.20mm Standard layer height
• Filament: Generic PLA

To change settings, edit variables in justfile:

_orca_machine_profile := ".orca-profiles-local/BBL/machine/..." _orca_process_profile := ".orca-slicer/resources/profiles/BBL/process/..." _orca_filament_profile := ".orca-slicer/resources/profiles/BBL/filament/..."

See .orca-profiles-local/README.md for details on profile overrides.

GitHub Actions automatically validates all models on every push:

1. Syntax Check - Validates OpenSCAD syntax
2. Rendering - Generates STL files from all .scad models
3. Slicing - Generates 3MF files with embedded G-code
4. Validation - Ensures no slicing errors occurred

Build artifacts (STL, 3MF, logs) are uploaded and available for download from the Actions tab.

1. Create a new directory: projects/<project-name>/
2. Add your .scad files
3. Add a README.md describing the project
4. Commit and push - CI will automatically validate

Files are named <project-name>__<model-name>.stl in artifacts to avoid conflicts.