grabowski
a0c843204d
- Refactor mechanical/ directory to support multiple sub-assemblies instead of just enclosures - Update mechanical/README.md with comprehensive sub-assembly organization examples - Enhance mechanical/cad/README.md with detailed sub-assembly structure (PCB mounts, sensor housing, connector panels, cooling, etc.) - Expand mechanical/enclosure/README.md to cover main housing, sub-enclosures, and removable panels - Improve mechanical/stl/README.md with broader 3D printing categories including tooling, prototyping, and custom components - Update mechanical/drawings/README.md with comprehensive technical drawing organization for all mechanical components - Add detailed manufacturing considerations, quality control procedures, and file management guidelines - Support complex projects with multiple mechanical sub-systems and assemblies
/mechanical/stl
3D printable files for all mechanical components and sub-assemblies.
Purpose
This directory contains STL files ready for 3D printing, organized by functional categories. These files support prototyping, custom tooling, replacement parts, and production components.
Organization by Function
Organize STL files by their intended use and sub-assembly:
stl/
├── enclosure-parts/ # 3D printable enclosure components
│ ├── housing-prototypes/
│ ├── custom-panels/
│ ├── mounting-brackets/
│ └── access-covers/
├── mounting-hardware/ # Custom brackets and mounting solutions
│ ├── pcb-mounts/
│ ├── sensor-brackets/
│ ├── cable-management/
│ └── standoffs-spacers/
├── prototyping/ # Prototype and development parts
│ ├── concept-models/
│ ├── fit-test-parts/
│ ├── functional-prototypes/
│ └── design-iterations/
├── tooling/ # Assembly and manufacturing aids
│ ├── assembly-jigs/
│ ├── test-fixtures/
│ ├── alignment-tools/
│ └── handling-fixtures/
├── replacement-parts/ # Service and maintenance components
│ ├── wear-parts/
│ ├── consumables/
│ └── field-replaceable/
└── custom-components/ # Project-specific mechanical parts
├── actuator-parts/
├── interface-components/
├── structural-elements/
└── specialty-hardware/
File Naming Convention
Use descriptive names that include key specifications:
PCB-Mount-Bracket_M3-Holes_v2.1.stlSensor-Housing-Top_IP65_ABS.stlCable-Gland_PG16_TPU-Flexible.stlAssembly-Jig_Main-PCB_PLA.stl
Print Settings Documentation
Include recommended print settings for each component:
Material Recommendations
- PLA: Prototyping, non-critical parts, tooling
- PETG: Mechanical parts, chemical resistance
- ABS: Structural components, higher temperature resistance
- TPU: Flexible parts, gaskets, vibration dampening
- ASA: Outdoor use, UV resistance
- PC: High strength, high temperature applications
Print Quality Settings
Document recommended settings for each part:
- Layer Height: 0.1mm (fine), 0.2mm (standard), 0.3mm (draft)
- Infill: 10-20% (light), 40-60% (standard), 80-100% (structural)
- Support: Required/not required, support type
- Orientation: Optimal print orientation for strength/finish
- Post-Processing: Required finishing operations
Quality Control
Print Validation
- Dimensional Accuracy: Critical dimensions and tolerances
- Surface Finish: Required surface quality
- Mechanical Properties: Strength and durability requirements
- Fit and Function: Assembly and mating requirements
Testing Procedures
- Fit Testing: Verify assembly with mating parts
- Functional Testing: Confirm operational requirements
- Durability Testing: Lifecycle and wear testing
- Environmental Testing: Temperature and chemical resistance
Manufacturing Notes
Production Considerations
- Print Time: Estimated printing duration
- Material Usage: Filament consumption estimates
- Batch Production: Multiple part printing strategies
- Quality Assurance: Inspection and acceptance criteria
Alternative Manufacturing
Document when injection molding or machining might be preferred:
- Volume Thresholds: When to consider other processes
- Material Limitations: Properties not achievable with 3D printing
- Tolerance Requirements: Precision beyond 3D printing capabilities
- Surface Finish: Requirements for smooth or textured surfaces
File Management
Version Control
- Include version numbers in filenames
- Document changes in commit messages
- Tag releases for production parts
- Maintain design history and rationale
Source File References
- Link STL files to source CAD files
- Document any modifications made for 3D printing
- Include original design intent and specifications
- Reference assembly drawings and instructions
Print Instructions
Setup Requirements
- Printer Specifications: Minimum build volume and capabilities
- Material Preparation: Drying and storage requirements
- Bed Preparation: Adhesion and leveling requirements
- Environmental Conditions: Temperature and humidity control
Post-Processing
- Support Removal: Techniques and tools required
- Surface Finishing: Sanding, smoothing, or coating
- Assembly Preparation: Drilling, tapping, or fitting operations
- Quality Inspection: Dimensional and visual checks