As we enter 2026, the Snapmaker U1 has redefined the professional 3D printing landscape. Far more than a standard printer, the U1 is a high-performance toolchanger system, allowing for seamless multi-material workflows and complex engineering projects. However, a major question remains for professional users: how do you print high-performance industrial parts on an open-frame system without warping?
The answer lies in the material. For high-strength, field-ready engineering parts on the Snapmaker U1, Siraya Tech PET-GF is the ultimate strategic partner.
1. The Open Frame Advantage: Why PET-GF is the Key for the U1
While many industrial filaments like ABS or Nylon require a heated, enclosed chamber to prevent warping and layer splitting, the Snapmaker U1’s open architecture is built for accessibility and modular toolchanging. This is where Siraya Tech Fibreheart PET-GF (Glass Fiber Reinforced PET) shines.
By infusing PET with 15% chopped glass fibers, we’ve created a material that fundamentally changes the printing experience:
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Increased Stiffness: The glass fiber reinforcement creates a robust internal structural mesh, delivering rigidity far superior to standard filaments.
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Reduced Warping: The fibers act as a stabilizing "skeleton," drastically reducing thermal shrinkage. This makes PET-GF easy enough to print on an open-frame system like the U1 without the need for an enclosure.
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Dimensional Stability: Your parts stay flat and true to the original CAD design, ensuring perfect fitment for mechanical assemblies.
2. A Legacy of Field Performance: Reliability Outside the Laboratory
Historically, glass-fiber PET was designed for field use. It was built for the rugged outdoors and real-world industrial environments, not just controlled laboratory settings. This legacy of durability is why it pairs so perfectly with the Snapmaker U1.
Because PET-GF has ultra-low moisture absorption and superior UV resistance, it is the go-to filament for outdoor gear, military-grade hardware, and functional prototypes. While the U1 offers the precision of a professional toolchanger, the "field-ready" nature of PET-GF ensures that the parts you produce are ready for the harshest conditions the moment they leave the print bed.
3. High-Speed Engineering & Expanded Aesthetics
The U1 is built for speed and versatility, and PET-GF is engineered to keep up:
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Thermal Excellence: PET-GF can be annealed (heated at 95°C for 4 hours) to unlock even higher stiffness and an increased Heat Deflection Temperature (HDT), making it suitable for high-heat environments.
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New Professional Colors: While our tactical FDE (Flat Dark Earth) and ODG (Olive Drab Green) remain favorites, PET-GF is now available in Black and White. These colors provide a sleek, industrial look that mimics injection-molded components for consumer electronics and medical prototypes.
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Industrial Aesthetics: The matte finish provided by the glass fiber reinforcement hides layer lines beautifully, resulting in professional-grade parts straight off the bed.
4. Pro-Tips: Optimizing Your Snapmaker U1 Toolchanger
To get the most out of your PET-GF prints on the U1, follow these expert guidelines:
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Hardened Nozzles: Precision toolchanging requires consistent nozzle geometry. Since glass fiber is abrasive, ensure your U1 print heads are equipped with hardened steel or wear-resistant nozzles to maintain accuracy over time.
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Bed Adhesion: Set your heated bed to 80-90°C. Because PET-GF is so stable, you’ll find it’s one of the easiest professional materials to print on an open-frame system.
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Multi-Material Synergies: Utilize the U1’s toolchanging capability to pair PET-GF with specialized support materials for complex geometries that require high-strength internal structures.
5. Download the Official Snapmaker U1 + PET-GF Profiles
To ensure success on your toolchanger, we have optimized the settings for you. You can download the official PET-GF Print Profiles and technical documentation directly from our support center.
Access Resources:
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Official Print Settings: https://siraya.tech/pages/print-settings-download
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Technical Data Sheets (TDS): https://siraya.tech/pages/tds
Summary: A New Standard for Desktop Manufacturing
At Siraya Tech, we are dedicated to providing materials that empower the next generation of manufacturing. The Snapmaker U1 is a remarkable toolchanger that proves you don't need to be "boxed in" to produce professional-grade parts.
By pairing the U1 with Siraya Tech PET-GF, you are manufacturing high-performance, field-ready components with unmatched speed, stability, and precision—enclosure not required.