# /mechanical

Mechanical design files for all physical components and sub-assemblies.

## Purpose
This directory contains mechanical design files for the complete physical system, including multiple sub-assemblies, enclosures, mounting hardware, and mechanical interfaces.

## Directory Structure
- `cad/` - Editable CAD models and assemblies
- `drawings/` - 2D technical drawings and specifications
- `enclosure/` - Housing and case designs
- `stl/` - 3D printable files for all components

## Sub-Assembly Organization
For projects with multiple mechanical sub-assemblies, organize by function:

```
mechanical/
├── cad/
│   ├── main-assembly/          # Complete system assembly
│   ├── pcb-mount/              # PCB mounting and brackets
│   ├── sensor-housing/         # Sensor enclosures and mounts
│   ├── connector-panel/        # Connector panels and interfaces
│   ├── cooling/                # Heat sinks, fans, thermal management
│   └── fasteners/              # Custom bolts, spacers, hardware
├── drawings/
│   ├── assembly-drawings/      # Overall assembly drawings
│   ├── detail-drawings/        # Individual part drawings
│   ├── interface-drawings/     # Mating part specifications
│   └── manufacturing-drawings/ # Fabrication specifications
├── enclosure/
│   ├── main-housing/           # Primary enclosure
│   ├── sub-enclosures/         # Secondary housings
│   └── covers-panels/          # Removable covers and access panels
└── stl/
    ├── enclosure-parts/        # 3D printable enclosure components
    ├── mounting-hardware/      # Custom brackets and mounts
    ├── prototyping/            # Prototype and test fixtures
    └── tooling/                # Assembly jigs and fixtures
```

## File Types
- **CAD Files**: Native CAD formats (.sldprt, .step, .iges, .f3d)
- **Drawings**: PDF technical drawings and DXF files
- **3D Models**: STL files for 3D printing, STEP for manufacturing
- **Assembly Files**: Complete system assemblies and sub-assemblies

## Design Considerations
- **Modularity**: Design for easy assembly and maintenance
- **Manufacturing**: Consider fabrication methods and tolerances
- **Materials**: Document material specifications and requirements
- **Interfaces**: Define mechanical interfaces between sub-assemblies
- **Thermal**: Account for heat dissipation and airflow
- **Accessibility**: Ensure access for assembly, service, and repair

## CAD File Management
- Use consistent naming conventions across all files
- Maintain assembly hierarchy and relationships
- Include material properties and finish specifications
- Document design intent and critical dimensions
- Version control CAD files with descriptive commit messages

## Manufacturing Integration
- Coordinate with PCB dimensions and mounting holes
- Consider assembly sequence and tooling requirements
- Define tolerances and critical dimensions
- Specify surface finishes and treatments
- Include inspection and quality requirements

## Documentation Requirements
- Assembly instructions and procedures
- Bill of materials for mechanical components
- Interface specifications and mating requirements
- Manufacturing and fabrication notes
- Testing and validation procedures