47 lines
1.9 KiB
Markdown
47 lines
1.9 KiB
Markdown
# Parametric Keyring
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**Status:** Digitally validated; lug strength and inlay fit require physical tests.
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The editable generator is [parametric-keyring.scad](parametric-keyring.scad). FDM printing; the generator also provides intentional 2D output.
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## Defaults and important controls
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58 × 30 × 3.2 mm rounded rectangle, reinforced right lug, and two-line raised text.
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**Fit and tolerance:** The default inlay clearance is 0.12 mm and must be calibrated per printer.
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Open the SCAD file in OpenSCAD and use **Window → Customizer** to change the documented parameters. Dimensions are millimetres.
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## OpenSCAD and export
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This generator requires a recent OpenSCAD Nightly build with `textmetrics` enabled.
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1. Open the SCAD file and select parameters in Customizer.
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2. Press **F6** for a full render.
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3. Use **File → Export → Export as STL** for printable 3D output.
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4. Slice with the actual printer, nozzle, material, and layer profile.
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## Included examples
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| Preset | STL | Digital render |
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| --- | --- | --- |
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| Default raised text | [Download](stl-files/raised-text.stl) | [Preview](images/raised-text.png) |
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| Heart with two lugs | [Download](stl-files/heart-two-lugs.stl) | [Preview](images/heart-two-lugs.png) |
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| Separate inlay text insert | [Download](stl-files/inlay-insert.stl) | [Preview](images/inlay-insert.png) |
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## Printing and fabrication
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Print 3D keyrings flat on the bed.
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The included STL files passed digital mesh and slicer checks. Digital validation does not establish physical fit, strength, fatigue life, or material suitability.
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## Known limitations
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- Requires OpenSCAD Nightly with textmetrics enabled.
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- Small text and ring holes need visual and physical inspection.
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## License
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The SCAD source, STL models, renders, and documentation in this public package are licensed under **CC BY-NC 4.0**. See the repository [LICENSE](../LICENSE.md).
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