COEX PCTG Prime print settings
Print PCTG Prime with a 250–280°C nozzle, a 75–90°C bed and the fan at 20–50%, and dry it at 65°C for 4–6 hours. An enclosure is recommended.
These are COEX 3D's recommended starting settings, made to match the COEX 3D filament settings tables for every filament we make in Green Bay, Wisconsin. Treat each value as a starting point and adjust it for your printer.
1. Material notes
- Keep filament dry: store it sealed, and dry it again only after the spool has been exposed to air
- Dry an opened spool at 65°C for 4–6 hours
- An enclosure is recommended
- Use a Z-offset slightly higher than for PLA (+0.05mm)
- Enable "Avoid crossing perimeters" to reduce stringing
- Consider using the "Wipe while retract" option
- Enable "Slow down for small perimeters"
- Print outer walls slower for better quality
- Use a minimum layer time of 30 seconds for small parts
- Increase cooling gradually after the first layer
- Consider using "Extra Prime Amount" after retraction
2. Temperature settings
Nozzle temperature: 250–280°C
Bed temperature: 75–90°C
- Wash the bed often for good adhesion: use dish soap and rinse thoroughly to remove oils
- Bed adhesion: use a glue stick or hairspray as a release agent, or WELD3D. PETG and PCTG bond very strongly to glass and smooth PEI, so a release agent protects both the print and the plate
- Use a brim for tall or large prints
- Keep the ambient temperature stable
3. Basic parameters
| Nozzle | Layer height | Line width | Max volumetric speed | Nozzle temperature |
|---|---|---|---|---|
| 0.4mm | 0.2mm | 0.42mm | 14.0 mm³/s | 250°C |
| 0.6mm | 0.3mm | 0.62mm | 31.5 mm³/s | 250°C |
| 0.8mm | 0.4mm | 0.82mm | 56.0 mm³/s | 250°C |
| 1.0mm | 0.5mm | 1.02mm | 87.5 mm³/s | 265°C |
4. Speed settings
0.4mm nozzle (max volumetric speed 14.0 mm³/s)
| Line type | Percentage | Speed |
|---|---|---|
| External perimeter | 50% | 83.33 mm/s |
| Internal perimeters | 75% | 125.00 mm/s |
| Infill | 100% | 166.67 mm/s |
| Top/bottom | 60% | 100.00 mm/s |
| First layer | 30% | 50.00 mm/s |
0.6mm nozzle (max volumetric speed 31.5 mm³/s)
| Line type | Percentage | Speed |
|---|---|---|
| External perimeter | 50% | 84.68 mm/s |
| Internal perimeters | 75% | 127.02 mm/s |
| Infill | 100% | 169.35 mm/s |
| Top/bottom | 60% | 101.61 mm/s |
| First layer | 30% | 50.81 mm/s |
0.8mm nozzle (max volumetric speed 56.0 mm³/s)
| Line type | Percentage | Speed |
|---|---|---|
| External perimeter | 50% | 85.37 mm/s |
| Internal perimeters | 75% | 128.05 mm/s |
| Infill | 100% | 170.73 mm/s |
| Top/bottom | 60% | 102.44 mm/s |
| First layer | 30% | 51.22 mm/s |
1.0mm nozzle (max volumetric speed 87.5 mm³/s)
| Line type | Percentage | Speed |
|---|---|---|
| External perimeter | 50% | 85.78 mm/s |
| Internal perimeters | 75% | 128.68 mm/s |
| Infill | 100% | 171.57 mm/s |
| Top/bottom | 60% | 102.94 mm/s |
| First layer | 30% | 51.47 mm/s |
5. Retraction settings
Important: Set travel speed to the maximum your machine allows (200–500mm/s). Faster moves give the filament less time to ooze, which reduces stringing.
| Nozzle | Distance | Speed | Z-hop |
|---|---|---|---|
| 0.4mm | 1.0–1.5mm | 40mm/s | 0.2mm |
| 0.6mm | 1.0–1.5mm | 40mm/s | 0.2mm |
| 0.8mm | 1.0–1.5mm | 40mm/s | 0.2mm |
| 1.0mm | 1.0–1.5mm | 40mm/s | 0.2mm |
6. Cooling settings
Fan speed settings:
- First layer: 0% (fan off)
- General printing: 40% fan speed
- Bridges and overhangs: 50% fan speed
- Layers under 30 seconds: 50% fan speed
Advanced settings:
- Keep fan always on: yes
- Force fan speed for overhangs: yes
- Minimum layer time: 30 seconds
- Force fan speed for small perimeters: yes
Additional cooling notes:
- Increase fan speed gradually after the first layer
- Increase fan speed for small, detailed parts
- Reduce fan speed for better layer adhesion if needed
- Watch overhang and bridge quality and adjust fan speed to suit
7. Troubleshooting
| Problem | Solution |
|---|---|
| Irregular extrusion |
|
| Poor adhesion |
|
| Stringing |
|
Please note: These printing parameters are initial recommendations based on our experience. They may need adjustment for your specific 3D printer, environmental conditions and the geometry of the part you are printing. Use them as a starting point and fine-tune them for your needs.

