"sonics" Cheer Charm

A multi-color 3D-printable charm of the sonics team logo — built as a keychain, a bag charm, and a Croc/Jibbitz charm. Designed for a Bambu Lab H2D + AMS (multi-color), but it prints fine in a single color too.

The logo is rebuilt from the uniform: red blackletter text + white outline + black background, in an Old-English (Fraktur) font.

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TL;DR — what do I print?

I want a…	Folder	Notes
Keychain	models/keychain/	5 mm hole for a key ring / split ring
Bag charm	models/bagcharm/	8 mm hole for a lobster clasp
Croc charm	models/croc/	Snap-in rivet on the back (⚠ experimental — see below)

Each folder contains the same set of files:

File	What it is
*_plate.stl	The black background plate (+ loop / rivet)
*_outline.stl	The white outline around the letters
*_text.stl	The red "sonics" lettering
*_combined.stl	All three fused into one — print this for a single-color charm
*.step	Editable CAD file (for me, or any CAD program, to tweak later)

The charm is ~56 mm wide and the word is 50 mm wide.

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How to print it in COLOR on your H2D + AMS

This is the magic of your printer. You'll load the three colored pieces as one object and tell Bambu Studio which filament each piece uses.

1. Load filament into the AMS: black, white, and red (red = true cheer red; "Bambu Red" or similar is perfect).
2. Open Bambu Studio and select your H2D as the printer.
3. File → Import → Import 3MF/STL… and select all three files from a folder at once: keychain_plate.stl, keychain_outline.stl, keychain_text.stl.
4. Bambu Studio will ask "Load these files as a single object?" → click Yes. They're modeled at the same coordinates, so they snap together perfectly into one charm.
5. In the right-hand Objects list, expand the object to see the 3 parts. Right-click each part → Change filament (or click the little color dot) and set:
   • …_plate → Black
   • …_outline → White
   • …_text → Red
6. Slice, preview (scrub the layer slider to watch the colors appear), then Print.

Single color instead? Just import the one *_combined.stl file and print normally — no AMS needed.

Recommended print settings (good starting point)

Setting	Value	Why
Material	PLA	Easiest, looks great, perfect for charms
Layer height	0.12–0.16 mm	Crisp small lettering
Walls / wall loops	3	Strong thin features
Infill	15–20%	It's tiny; this is plenty
Supports	Off (keychain & bag charm)	They're flat — no supports needed
Plate	Smooth PEI if you have it	Glossy back face
Orientation	Flat, as loaded	Already oriented correctly

A charm this size prints in roughly 20–40 minutes and uses only a few grams of filament.

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⚠ Croc charm notes (read before printing models/croc/)

Printable Croc/Jibbitz rivets are genuinely finicky — the exact fit depends on your specific Crocs. This one is a solid first attempt and may need a test-fit and a tweak:

• It's already flipped rivet-up / face-down, so it prints without supports. The smooth lettered front ends up against the build plate.
• Current rivet sizes (in src/generate_sonics_charm.py, CROC = {...}): neck Ø10 mm, neck height 3 mm, back flange Ø13 mm.
• If it won't snap in: the neck is too big — tell me and I'll shrink neck_d. If it pops out: the back flange is too small — I'll grow back_d. PLA is stiff; PETG or a TPU rivet snaps in more forgivingly.
• Easiest alternative: print the keychain charm (no loop hole version on request) and glue on a cheap stick-on Croc-charm back or a pin back.

Tell me your result and I'll dial it in.

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Want changes? It's fully parametric

Everything is generated by src/generate_sonics_charm.py. Just tell me what you want and I'll regenerate — e.g.:

• "Make it bigger / smaller" (TEXT_WIDTH)
• "Thicker / thinner white outline" (OUT_MARGIN)
• "Bigger black border" (PLATE_MARGIN)
• "Make the letters pop out more" (TEXT_RAISE)
• "Different blackletter font" — I also have PirataOne and GermaniaOne in fonts/
• "Add a year / name / second line"

To regenerate yourself (if you ever want to):

pip install cadquery shapely matplotlib trimesh pillow scipy
python3 src/generate_sonics_charm.py   # charms + (run svg script for Cricut)
python3 src/generate_bow.py --name Eden # cheer bow (traced from assets/)

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Cheer bow charms (with names!)

A multi-color cheer bow that clips to a backpack — white loops, red text, black trim, with a red center knot and a fully-printed snap clip on top. Layout: gym name on the left loop, team + athlete name on the right.

The bow shape is traced from a real bow image (assets/cheer_bow_source.png) by src/trace_bow.py, so it actually looks like a cheer bow. To use a different bow, drop in a new black-on-white silhouette and re-run.

• Files: models/bow_<name>/ (same structure as the charms: _plate = black, _outline = white, _text = red, plus _combined.stl and .step).
• Size: ~90 mm wide. Multi-color print exactly like the charms.

Make one per girl — change the name in one command

python3 src/generate_bow.py --name Eden
python3 src/generate_bow.py --name Harper
python3 src/generate_bow.py --name Aubrey --team XOXO --gym Sonics

Each run creates a new models/bow_<name>/ folder and a preview. Just send me the roster and I'll batch out all 12 at once.

⚠ About the snap clip

It's a fully-printed carabiner-style clip — experimental, so expect to test-print it and maybe tweak. Print in PLA or (better) PETG for a springier gate. If the gate is too stiff or too loose, tell me and I'll adjust CLIP_GATE_W / clearances. Print flat (as oriented) so the gate flexes along the layer lines.

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Credits / license

• Font: UnifrakturCook by Peter Wiegel / GFOS, licensed under the SIL Open Font License 1.1 (free for personal & commercial use). See fonts/LICENSE.md.
• Logo wordmark belongs to the sonics team — this is a fan/personal-use charm.