PET-CF Print Settings
Expert-recommended PET-CF (PET) settings for all Bambu Lab printers
Why use PET-CF?
- Carbon fiber reinforced PET for high stiffness and heat resistance
- Better moisture resistance than nylon-based CF materials
- Excellent dimensional stability for precision parts
- Good chemical resistance for industrial environments
- Easier to print than PA-CF variants while offering similar stiffness
- Lower moisture sensitivity than nylon-based alternatives
What are the best PET-CF print settings?
Use default Bambu Lab temperature profiles for PET-CF. Recommended outer wall speed is 130 mm/s.
| Setting | Value | Note |
|---|---|---|
| quality.lineWidth.default | 0.44 | Wider for CF fiber flow |
| strength.walls.wallLoops | 3 | Extra walls for CF structural integrity |
| speed.layers.outerWall | 130 | Slower for CF surface quality |
| speed.layers.innerWall | 220 | Moderate CF speed |
| speed.layers.sparseInfill | 350 | Reduced for CF viscosity |
| support.filament.interface | Support for PA/PET (Bambu Lab) | PA/PET interface for PET-CF |
| support.filament.base | Same as model | PET-CF as bulk support |
| speed.initial.layer | 30 | Slow first layer |
| others.bed.brimType | Outer and inner brim | Warping prevention |
| others.bed.brimWidth | 8 | Wide brim for PET-CF |
| support.thresholdAngle | 30 | Standard support threshold |
What nozzle size should I use for PET-CF?
0.4mm hardened steel REQUIRED
0.4mm hardened steel nozzle
0.6mm hardened steel
How do I dry PET-CF filament?
Dry PET-CF at 70°C for 6-8 hours. Moderate — PET-CF is more moisture-tolerant than PA-CF
What support material should I use with PET-CF?
Recommended: PET-CF base + Support for PA/PET interface
Base: Same as model (PET-CF) | Interface: Support for PA/PET (Bambu Lab)
PET-CF as bulk support with PA/PET at interface. Saves support filament while maintaining thermal compatibility.
~25% less support filament used
Expert Tips for PET-CF
- PET-CF is a great alternative to PA-CF if moisture sensitivity is a concern.
- Hardened steel nozzle required — CF fibers are extremely abrasive.
- Dry at 70°C for 6-8 hours, though PET-CF is more moisture-tolerant than PA-CF.
- Enclosure recommended for best results.
Which Bambu Lab printers work with PET-CF?
Alternatives to PET-CF
If you want a slightly easier-to-print CF option with similar chemistry
Trade-offs: Lower heat resistance. Slightly lower stiffness
If you need maximum stiffness and heat resistance over moisture tolerance
Trade-offs: PA6-CF is very moisture-sensitive — requires dedicated drying. Harder to print
Get your full PET-CF profile
Use Print Advisor to generate a complete Bambu Studio-compatible JSON profile for PET-CF, customized to your priorities and printer.
Open Print Advisor