Glass-fiber PETG Settings for Anycubic Kobra 2 Max
Recommended slicer settings for printing Glass-fiber PETG on the Anycubic Kobra 2 Max (420 x 420 x 500 mm build volume, 300 mm/s max speed, direct drive extruder).
Slicer Configuration
Copy these values into your slicer (Cura, OrcaSlicer, PrusaSlicer, Bambu Studio)| Setting | Value | Range |
|---|---|---|
| Nozzle Temperature | 248°C | 235-260°C |
| Bed Temperature | 88°C | 80-95°C |
| First Layer Nozzle | 253°C | +5°C above normal |
| First Layer Bed | 90°C | +2°C above normal |
| Print Speed | 40 mm/s | 30-50 mm/s |
| First Layer Speed | 15 mm/s | 25-50% of normal |
| Wall Speed | 30 mm/s | 70-80% of normal |
| Travel Speed | 75 mm/s | 120-150% of print speed |
| Layer Height | 0.2mm | 0.12-0.28mm |
| Infill | 15-20% | 10-30% |
| Wall Count | 2-3 | Perimeters/shells |
| Top/Bottom Layers | 3-4 | Solid layers |
| Cooling Fan | 100% | From layer 2+ |
| Retraction Distance | 0.8-1.2 mm | Direct drive |
| Retraction Speed | 40 mm/s | Direct drive |
Before You Print
Print Quality Profiles
Three presets for common use cases with Glass-fiber PETG on the Anycubic Kobra 2 Max.
| Profile | Layer Height | Speed | Infill | Best For |
|---|---|---|---|---|
| Draft | 0.28mm | 50 mm/s | 10-15% | Rapid prototyping, test fits |
| Standard | 0.20mm | 40 mm/s | 15-20% | General purpose, everyday prints |
| Quality | 0.12mm | 30 mm/s | 20-30% | Miniatures, display pieces, fine detail |
Bed Adhesion
Glass-fiber PETG adheres like standard PETG. Use a textured PEI sheet or glue stick on smooth PEI as a release agent. The glass fibers reduce warping compared to plain PETG. A hardened steel nozzle is required.
Temperature Tuning Guide
Nozzle: 248°C
Range: 235-260°C. Printer max: 260°C.
- Poor layer adhesion? Increase +5°C
- Stringing or oozing? Decrease -5°C
- Print a temperature tower to find your exact sweet spot
Bed: 88°C
Range: 80-95°C. Printer max: 90°C.
- First layer lifting? Increase +5°C
- Elephant's foot? Decrease -5°C
- Let the bed fully preheat before starting
Troubleshooting Glass-fiber PETG on Anycubic Kobra 2 Max
Pro Tips for Glass-fiber PETG
Hardened steel nozzle (0.5mm+) is mandatory -- glass fibers are even more abrasive than carbon fibers
Dry thoroughly at 65°C for 8 hours before printing
Print 30% slower than plain PETG for best surface quality
Glass-fiber PETG is stiffer than carbon-fiber PETG but slightly less strong; good for dimensional stability
Support Settings
For prints requiring supports with Glass-fiber PETG, use tree supports for easier removal and less scarring. Set a 0.15-0.2mm Z-distance between support and model. If you have a dual-extruder setup, consider PVA (for PLA/PETG) or HIPS (for ABS) as dedicated water/solvent-soluble support material.
Anycubic Kobra 2 Max Specs
| Build Volume | 420 x 420 x 500 mm |
| Max Speed | 300 mm/s |
| Max Nozzle Temp | 260°C |
| Max Bed Temp | 90°C |
| Extruder | Direct Drive |
Glass-fiber PETG Properties
| Nozzle Range | 235-260°C |
| Bed Range | 80-95°C |
| Speed Range | 30-50 mm/s |
| Difficulty | intermediate |
| Drying | 65°C / 7h |
| Enclosure | Not needed |
Glass-fiber PETG at a Glance
Strengths
- Much stiffer than standard PETG
- Better heat resistance than plain PETG
- Good dimensional stability
- Less expensive than carbon fiber composites
Weaknesses
- Hardened steel nozzle required
- Increased brittleness vs standard PETG
- Use 0.5mm+ nozzle to prevent clogging
- Rougher surface finish
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Try 3DSearch →Sources: Based on manufacturer specifications and community recommendations, community testing data, manufacturer recommended ranges. Values calculated from filament specifications and printer hardware limits.