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Ending the Wild West of Smart Spools

An open-source initiative by Prusa Research creating a single smart spool standard that works across all brands and ecosystems. This allows printers and users to read and write data directly on any spool, making 3D printing more reliable and intuitive for everyone.

100%
Open Source
Universal
Compatibility
Future
Proof

Why Do We Need Smart Spools?

3D printers have become incredibly user-friendly, but interaction with filament is still a very manual process. To improve the user experience and streamline the workflow, we need smart spools.

A smart spool carries all the important information about the material and its workflow, unlocking key features:

Material Recognition

Instantly identifies the material type and color, significantly reducing user error and leading to a simpler, more reliable workflow.

Live Data Tracking

Real-time data tracking, such as the amount of remaining filament, so you always know the exact status of your material.

Inventory Management

Enables effortless inventory management and full traceability by allowing you to log custom data.

The Few "Smart" Spools Today

Some smart spools already exist, but they lack the core principles of universality and interoperability. It's like every brand suddenly decided to use a different filament diameter.

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Locked Proprietary Ecosystems

Smart spools are often locked to their specific hardware and filament. This makes them unusable with any third-party machines, forcing users into a closed ecosystem.

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Cloud Dependency

Many smart spools just refer to an online database, forcing you to rely on the manufacturer's cloud service. No internet? Your "smart" spool becomes dumb.

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Read-Only & One-Time-Use

Current Smart Spools offer little to zero reusability. This read-only design prevents any updates to live data, and once the filament is depleted, you have no choice but to throw the 'smart' spool away.

Burit | Budak Sekolah Tunjuk

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The Malaysian Certificate of Education. Taken at the end of Form 5, this high-stakes exam determines university and scholarship eligibility. A Day in the Life of a Malaysian Student

White baju kurung (traditional long tunic) with a turquoise or navy blue maxi skirt, or a classic pinafore dress. Muslim girls wear a plain white hijab (tudung). The Role of Prefects (Pengawas) Budak Sekolah Tunjuk Burit

White shirts paired with navy blue short trousers (primary) or olive green long trousers (secondary).

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Compulsory by law since 2003. Students progress from Standard 1 to Standard 6.

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Uniforms are strictly enforced, serving as a great equalizer. Boys wear dark green trousers and white shirts; girls wear turquoise pinafores (baju kurung) or skirts and blouses. Physical appearance is heavily policed: hair must be short and neatly styled for boys, while girls' hair must be tied back, and the wearing of the tudung (headscarf) is optional but prevalent among Muslim students. "Spot checks" for contraband (mobile phones, dyed hair, nail polish) are routine.

Smart spool with NFC tag
Mobile app reading NFC tag

Smarter Hardware by Design

View physical specification →

Universal NFC Tag

Circular tag layout with 360° reading

Instantly read or write in any orientation. This eliminates the need to rotate the spool to find the "correct" position.

Inexpensive universal tag

Stick a blank tag on any filament spool you own, flash it using your printer or a phone app, and simply re-use it once the spool is empty.

A single tag, even for 2kg spools

A single tag works even for 2kg spools, ensuring live data is always perfectly in sync. Two-tag designs cannot guarantee this.

Tap & Scan

A 3D printer or any compatible device instantly reads all data the moment the spool is loaded.

Join the Open Standard

Whether you're a manufacturer, developer, or 3D printing enthusiast, OpenPrintTag makes your workflow smarter.

Contact us

Want to integrate OpenPrintTag or become a partner?

Get in touch at [email protected]

OpenPrintTag is Open Source!

Explore the specification, examples, and SDKs to integrate OpenPrintTag into your projects.

Software implementations

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