PHA Settings for Prusa Mini+
Recommended slicer settings for printing PHA on the Prusa Mini+ (180 x 180 x 180 mm build volume, 180 mm/s max speed, Bowden extruder).
Slicer Configuration
Copy these values into your slicer (Cura, OrcaSlicer, PrusaSlicer, Bambu Studio)| Setting | Value | Range |
|---|---|---|
| Nozzle Temperature | 188°C | 175-200°C |
| Bed Temperature | 50°C | 40-60°C |
| First Layer Nozzle | 193°C | +5°C above normal |
| First Layer Bed | 55°C | +5°C above normal |
| Print Speed | 35 mm/s | 25-45 mm/s |
| First Layer Speed | 15 mm/s | 25-50% of normal |
| Wall Speed | 26 mm/s | 70-80% of normal |
| Travel Speed | 68 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 | 4-6 mm | Bowden |
| Retraction Speed | 40 mm/s | Bowden |
Before You Print
Print Quality Profiles
Three presets for common use cases with PHA on the Prusa Mini+.
| Profile | Layer Height | Speed | Infill | Best For |
|---|---|---|---|---|
| Draft | 0.28mm | 45 mm/s | 10-15% | Rapid prototyping, test fits |
| Standard | 0.20mm | 35 mm/s | 15-20% | General purpose, everyday prints |
| Quality | 0.12mm | 25 mm/s | 20-30% | Miniatures, display pieces, fine detail |
Bed Adhesion
PHA (polyhydroxyalkanoate) adheres similarly to PLA. Use a clean PEI sheet or glass bed with glue stick at 50-60°C. PHA is biodegradable and slightly more flexible than PLA.
Temperature Tuning Guide
Nozzle: 188°C
Range: 175-200°C. Printer max: 280°C.
- Poor layer adhesion? Increase +5°C
- Stringing or oozing? Decrease -5°C
- Print a temperature tower to find your exact sweet spot
Bed: 50°C
Range: 40-60°C. Printer max: 100°C.
- First layer lifting? Increase +5°C
- Elephant's foot? Decrease -5°C
- Let the bed fully preheat before starting
Troubleshooting PHA on Prusa Mini+
Pro Tips for PHA
PHA is fully biodegradable and compostable -- a greener alternative to PLA
Print settings are very similar to PLA; start with PLA settings and adjust from there
PHA is slightly more flexible than PLA and less brittle on impact
Store in a cool, dry place; PHA biodegrades faster in humid environments
Support Settings
For prints requiring supports with PHA, 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.
Prusa Mini+ Specs
| Build Volume | 180 x 180 x 180 mm |
| Max Speed | 180 mm/s |
| Max Nozzle Temp | 280°C |
| Max Bed Temp | 100°C |
| Extruder | Bowden |
PHA Properties
| Nozzle Range | 175-200°C |
| Bed Range | 40-60°C |
| Speed Range | 25-45 mm/s |
| Difficulty | beginner |
| Drying | Not required |
| Enclosure | Not needed |
PHA at a Glance
Strengths
- Fully biodegradable in soil and marine environments
- Renewable bioplastic from bacterial fermentation
- Non-toxic and biocompatible
- Easier to print than PLA in some cases
Weaknesses
- Lower heat resistance than PLA (~55°C)
- More expensive than PLA
- Limited availability and color options
- Slower degradation rate than marketed
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Try 3DSearch →Sources: Based on Prusa Knowledge Base (help.prusa3d.com), community testing data, manufacturer recommended ranges. Values calculated from filament specifications and printer hardware limits.