Fibreheart PETG-CF High Flow User Manual

Introduction to Siraya Tech PETG-CF HF

Designed for both hobbyists and professionals, this guide helps you harness the capabilities of PETG-CF HF High Flow, a unique 3D printing filament that merges the user-friendliness of PETG with the enhanced strength and durability of carbon fiber reinforcement. This material is ideal for those seeking a lightweight yet robust material for functional prototypes, tooling, and end-use parts.

Preparing for Printing

  • Printer Compatibility

Siraya Tech PETG-CF HF High Flow is compatible with most FDM/FFF 3D printers that have a heated bed and a nozzle capable of reaching 240°C.

For optimal results, direct drive extruders are recommended as they offer superior filament control, which is crucial for reliably printing with carbon fiber-reinforced materials.

A hardened steel nozzle is also recommended to prevent wear and tear from the abrasive carbon fiber content.   

  • Print Bed Preparation

Ensure your print bed is clean and properly leveled. The recommended build plate temperature is 80°C. Compatible build surfaces include glass and PEI film.   

  • Enclosure (Recommended)

While not mandatory, an enclosure is highly recommended when printing with PETG-CF HF High Flow. An enclosure helps maintain a consistent temperature throughout the printing process, which is crucial for preventing warping or cracking, especially in larger prints.   

Printing with Siraya Tech PETG-CF HF

Nozzle Temperature 230-250°C  
Build Plate Temperature 80°C
Printing speeds 100-200 mm/s Start at the lower end of this range and gradually increase the speed to find the optimal setting.
Recommended nozzle diameter 0.4 mm or larger
Nozzle material recommendation Carbon hardened, hardened steel or higher grade nozzles
Retraction Distance 1-5 mm  
Retraction Speed 1800-3600 mm/min
Build Platform Material Glass and PEI film Using a glue stick or a specialized coating can further enhance adhesion. 
Cooling Fan 0-30%

 

Moisture Management

Like many engineering-grade filaments, PETG-CF HF High Flow can absorb moisture from the air, which can negatively affect print quality.

  • Storage

Always store the filament in its original moisture-resistant packaging when not in use. For long-term storage, using a dry box with desiccant is highly recommended.

  • Drying Filament 
    • This can be done by placing the filament in a food dehydrator or oven at 70-80°C for 4-6 hours.
    • Do not dry the filament right after opening the packaging, as Siraya Tech dries all their filaments. Overdrying a dried filament can trigger the annealing process and make the filament unprintable.
  •  
    • If you observe any degradation in print quality after prolonged exposure to air, you may need to dry the filament.
  •  
    • It's important to note that excessive drying can degrade the filament, so only dry it if necessary.

Additional Recommendations

  • Although PETG-CF HF High Flow has lower odor compared to ABS-CF, it's still recommended to print in a well-ventilated area.
  • If using support structures, a Raft separation distance of 0.16-0.18 mm is recommended.
  • For functional parts requiring maximum strength, using 100% infill with ±45° infill angles can provide optimal results.