Pre-print simulator for Bambu Lab 3D printers: printability, stability, strength (FEA), physics and robot/mechanism simulation — web app + MCP server for AI agents
Test your 3D prints before you print them — and let AI agents do it for you.
phyx3d checks a 3D model (STL, 3MF, or a sliced Bambu Studio .gcode.3mf) for the things that make prints fail or break — overhangs, floating parts, thin walls, tipping over, weak spots under load — and simulates how the printed part behaves in the real world: dropped, tilted, pushed, stacked, or moving as part of a robot or machine.
It works three ways, all from the same engine:
Interface Good for --------- 🖥 Web app (phyx3d serve) Looking at problems in 3D, strength maps, physics & robot replays, G-code layer replay 🤖 MCP server (phyx3d-mcp) Letting Claude Code / Claude Desktop / Cursor design → test → fix parts on their own ⌨️ CLI (phyx3d check part.stl --json) Scripts and CI: JSON reports, PNG pictures, non-zero exit when a part needs changes
Made with Bambu Lab printers in mind (P1S / P1P / P2S / X1C / A1 / A1 mini / H2D presets), but the checks apply to any FDM printer.
Check How How far to trust it --------- Mesh health — holes, flipped faces, separate bodies edge topology exact Fits the build plate bounding box vs. printer volume exact Overhangs & supports (Bambu's 30° threshold); bridges vs. cantilevers face normals + voxel support test exact Floating islands (regions that start in mid-air) layer-by-layer voxels estimate Thin walls (
Keep phyx3d serve open while the agent works: every check it runs appears live in the web app's Agent tab. Runs are stored in ~/.phyx3d/runs/ (override with PHYX3DHOME).
From the project README.
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