Deep within ancient ruins, the sword rests in stone.

Many have tried to pull it.
All have failed.

Excalibur does not belong to the strongest.
It belongs to the worthy.

Now it is your turn.

What Is This Project?

Excalibur – is a fully 3D-printable, mechanical escape-room style puzzle designed for makers.

You don’t just print a model. You assemble a legend.

At its core lies a hidden locking mechanism that prevents the sword from being removed. To release it, players must solve a sequence of mechanical and electrical challenges integrated directly into the structure. Rotating rune pillars, hidden compartments, movable stones, glowing LED symbols, and a motor-driven rune ring all work together in one connected system.

The electronics are simple and accessible — buttons, LEDs and motors. No microcontroller is required. Everything is designed to be reliable, resettable and buildable at home.

What do you need to build it?

• Electronic components (see detailed list — Products available via MakerWorld / Maker Supply) must be purchased separately before assembly
• Screws and magnets (standard sizes, list included)
• Filament in stone grey, silver, brown and blue
  (Optional: translucent filament for enhanced lighting effects)
• A 3D printer with a minimum bed size of 256 × 256 mm
• Patience and careful assembly
• A standard paper printer (to print lore pages, rune guides and in-game hints)

Excalibur uses 2 N20 worm gear motors, 1 COB LED strip, 1 momentary button module, 6 self-locking button switches, and 6 LED boards in total — 2 single white LED boards and 4 four-LED white boards. Power is supplied through 1 AAA battery case, connected via 1 power distribution board, 1 SH1.0 to PH2.0 adapter board, 4 Y-type PH2.0 to dual SH1.0 wires, 4 SH1.0 dual adapters, 3 PH2.0 wire pairs, and 3 SH1.0 wire pairs.

For assembly, it also requires 30 round D4x2 mm magnets, 26 M2.5x6 button head screws, 2 M2.5x10 button head screws, 14 M2x6 socket head screws, and 2 small rubber bands.

What puzzles are planned and how will it work?

What you will get!

• All 3D printable model files (digital download)
• Complete electronics list
• Printable puzzle graphics & lore documents (in English)
• Detailed assembly guide (video)
• Building tips & troubleshooting notes

Check the reward tiers for full details.

The Full Excalibur Puzzle Experience includes the complete mechanical puzzle system with motors, lighting, hidden compartments and all interactive elements. This version delivers the full experience — a resettable, multi-stage mechanical Escaperoom.

Who am I and what to expect?

I am a professional 3D and Visual Effects artist. Storytelling shapes both my film work and my 3D printing projects. Through Structales, I design mechanical marble runs, kinetic display pieces and escape-room style puzzle builds that combine engineering, atmosphere and narrative.

Excalibur is my most ambitious story-driven mechanical project so far, combining everything I learned from past projects and more. Check my past Projects here

What I need your help for?

What began as a simple sword-in-stone idea evolved into a layered mechanical experience. Each mechanism must function smoothly, reset reliably, and feel satisfying to operate. Achieving that balance requires extensive prototyping, testing and refinement.

Beyond mechanics, I want to deepen the lore with carefully designed graphics & immersive storytelling elements. As a visual effects artist and musician, building this atmosphere is something I care deeply about — but it requires time.

With your support, Excalibur will not just be a model — it will become a thoughtfully engineered, story-driven experience you can build and explore yourself.

Calling All Puzzle Lovers

If you enjoy escape rooms, also check out Cryptatrope: A Maker Adventure. It’s an electronics-free optical experience where you, the maker, are the player. Decode hidden messages to unlock downloads and progress through 3 chapters. Print → Decode → Advance