Swiss Lever Watch Movement Demo

A mechanically accurate Swiss lever watch movement simulation built in Three.js.

Description

A complex 3D watch movement featuring real gear ratios (18,000 bph), a working escapement, and a breathing hairspring. The project utilized an AI agent with vision capabilities to iteratively verify mechanical parts and ensure the gears correctly drive time-telling hands. It includes a dynamic camera system for inspection and automated iteration logging.

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Details

Why this is interesting: Generating a mechanically coherent system with correct gear ratios and vision-verified parts in one shot is a high-bar…
Attributed to: @huy0x
Built with: Fable 5
Tags: #threejs #horology #simulation #3d

Discovered: X
First posted: X · Jun 10, 2026
Listed: Added 2h ago
Build: Moderate
Models: Strong

Prompt

/goal Build the most realistic mechanical watch movement in Three.js – visible gears, escapement, balance wheel, all animated and mechanically coherent (gear ratios must actually make the hands tell real time). Build a camera system to inspect it from every angle and zoom level, use your vision capabilities to verify each part, and loop until you are 100% satisfied. Save a screenshot of every iteration to ./iterations/ so I can make a time-lapse.

Source