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3D Models

3D printing and CAD files for physical components in this project.

Directory Structure

models/
├── enclosures/    # Board cases and project housings
├── mounts/        # Mounting brackets, standoffs, DIN rail clips
├── robotics/      # Structural and mechanical parts (arms, joints, chassis)
├── jigs/          # Assembly jigs, soldering jigs, alignment tools
└── _source/       # Editable CAD source files (F3D, STEP, SCAD)

File Format Conventions

Format Extension Location Purpose
STL .stl Category folders Print-ready mesh files
3MF .3mf Category folders Print-ready with metadata
STEP .step _source/ Interchange CAD format
Fusion 360 .f3d _source/ Parametric source files
OpenSCAD .scad _source/ Programmatic CAD source

Print-ready files (STL, 3MF) go in the appropriate category folder. Editable source files (F3D, STEP, SCAD) go in _source/.

Naming Convention

Use lowercase-kebab-case with an optional version suffix:

<descriptive-name>[-v<version>].<ext>

Examples:

  • xiao-case-v2.stl
  • servo-mount.step
  • chassis-base.scad
  • controller-box-v1.3mf

Recommended Print Settings

Document slicer settings for each part as needed. General defaults:

Setting Default
Layer Height 0.2mm
Infill 20%
Supports As needed
Material PLA (unless noted)

Material Recommendations

  • PLA — General-purpose enclosures and mounts. Easy to print, sufficient for most indoor projects.
  • PETG — Parts requiring heat resistance or outdoor use. Better layer adhesion than PLA.
  • TPU — Flexible parts like vibration dampeners or cable grommets.
  • ABS/ASA — High-temperature environments or parts needing chemical resistance.

Tolerance Notes

  • Board mounting holes: design for M2.5 screws unless otherwise noted
  • Board slot fitment: add 0.2–0.3mm clearance per side for snug fit
  • Snap-fit tolerances vary by printer — test with a calibration piece first

Assembly Notes

If parts interlock or require specific assembly order, document the sequence in a comment block at the top of the source file or in a companion markdown file alongside the STL.