Local AI monitoring and control for 3D printers — detect failures, watch prints in progress, and pause from your phone. No subscription, no cloud, no vendor lock-in.
Vision: Gantry is a free, open-source app that uses computer vision to catch print failures and lets you control your printer from anywhere. The goal: give older and budget machines the exact same capabilities as the expensive ones, without any cloud lock-ins.
Windows installer — the easiest way to get started.
- Go to the latest release and download
Gantry_x64-setup.exe. - Run the installer and follow the prompts.
- Gantry starts automatically and opens the setup wizard in your browser.
Windows SmartScreen warning: Windows may show "Windows protected your PC" because the installer is not yet code-signed. Click More info then Run anyway to proceed. The source code is fully open — you can review it before running.
Early release (v0.1.0): Gantry is new and actively developed. Rough edges exist. If something breaks or confuses you, open an issue — every report helps.
Gantry watches your printer through a camera and uses an on-device AI model to spot failed prints — the tangled "spaghetti" mess that happens when a print comes loose. When it sees trouble, it sends a push notification straight to your phone through Ntfy. It works with any printer and any camera — a USB webcam or an RTSP network camera is all you need. Everything runs on your own machine and local network: there is no cloud service, no account to create, and nothing leaves your home.
It is also a print companion. Gantry tracks the print in progress — progress percentage, time remaining, and layer count — and notifies you when a print starts, finishes, pauses, or errors. On supported printers you can pause and resume remotely, and review your print history and statistics over time. Remote access is handled by Tailscale — a free, private VPN that connects your devices directly without any cloud intermediary.
The expensive printers already do this. A flagship Bambu Lab machine ships with built-in AI failure detection and remote monitoring — but it is tied to that hardware and that company's cloud. Gantry gives the same capabilities to everyone, for free: point a camera at an older Creality, an Ender, a Prusa, a Marlin-based machine, or anything else, and it gets the same eyes-on protection and remote control the premium printers charge for — with no subscription and no vendor lock-in.
Detection & alerts
- Spaghetti detection via a custom YOLO11n model
- Works with any RTSP or USB camera
- Detection zones — focus on the build plate, ignore busy backgrounds
- Ntfy push notifications to your phone or desktop
Print monitoring
- Live camera feed from anywhere (via Tailscale)
- Print progress, time remaining, and layer count
- Notifications when a print starts, completes, pauses, or errors
- Pause and resume the print remotely on supported printers
- Print history and statistics
Printer integrations
- Bambu Lab (LAN mode, with optional pause-on-detection)
- Moonraker / Klipper (Creality, Voron, and others)
- OctoPrint — Prusa, Ender, and other Marlin-based machines
- Any printer at all via camera-only monitoring
System
- Desktop app (Windows; macOS coming soon)
- Self-improving AI: review queue → train → hot-swap the model
- Timelapse recording
- Remote access via Tailscale
- Installable as a PWA on your phone
For contributors and developers building from source on Windows.
Requirements: Windows 10/11, Python 3.11+, Git.
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Clone the repository
git clone https://github.com/LundstedtAdam/Gantry.git cd Gantry
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Run the setup script (creates the virtual environment, installs dependencies, and seeds your config)
.\install.ps1
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Start the server
.\start.ps1
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Open the dashboard and follow the setup wizard to configure your camera and printer:
http://localhost:8080
No detection model yet? Gantry still starts and serves the setup wizard. Model assets are published on the Releases page — drop them into
ml\models\.
Gantry ships with a Tauri desktop wrapper (Windows; macOS coming soon) that runs the server as a background sidecar and lives in the system tray. For development:
cargo tauri devSee docs/DESKTOP.md for building the installer and the full desktop setup.
Step-by-step guides live inside the app's Help center. Once the server is running, open http://localhost:8080 and go to the Help section (reachable from Settings on mobile). It includes guides for:
- Bambu Lab (LAN mode)
- Moonraker / Klipper
- OctoPrint
- Camera (RTSP)
- Remote access (Tailscale)
| Dashboard | Review queue | Statistics |
|---|---|---|
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| Training | Mobile dashboard | Mobile nav |
|---|---|---|
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| Mobile review | Mobile stats | Mobile training |
|---|---|---|
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git clone https://github.com/LundstedtAdam/Gantry.git
cd Gantry
.\install.ps1
# Run the test suite
.venv\Scripts\python.exe -m pytest- See docs/PROMPT_GUIDE.md for the development workflow.
- Export labelled training data with
python scripts/export_training_data.py. - More on reporting bugs and submitting changes in docs/CONTRIBUTING.md.
Settings live in config/settings.yaml. This file is gitignored (it holds your camera URL and printer credentials) — install.ps1 creates it for you by copying config/settings.yaml.example. You can edit it by hand, but the easiest way is the Settings page in the web UI at http://localhost:8080.
Found a bug? Have a feature idea? Open an issue on GitHub — it is the fastest way to reach the maintainer and the most useful thing you can do for the project.
Common problems and fixes are collected in docs/GOTCHAS.md.