PETG-CF (Carbon Fibre PETG) on Bambu Lab X1 Carbon

Nozzle Temp

240 °C

Range: 230 – 250 °C

Bed Temp

70 °C

Range: 50 – 80 °C

Print Speed

50

mm/s · max 60

Layer Height

0.20

mm · max 0.28

Fan Speed

40 %

1st layer: 0 %

1st Layer Speed

20

mm/s

Retraction

1.0 mm

@ 30 mm/s

Nozzle Type

Hardened

Fitted as standard

Retraction Note

• A hardened nozzle is mandatory. Similar to regular PETG but run hotter

Settings

Recommended

Range

Nozzle Temperature

240 °C

230 – 250 °C

Bed Temperature

70 °C

50 – 80 °C

Print Speed

50 mm/s

up to 60 mm/s on this printer

First Layer Speed

20 mm/s

slower is better for adhesion

Layer Height

0.16 – 0.24 mm

0.12 – 0.28 mm

Fan Speed (Normal)

30 – 50 %

–

Fan Speed (1st Layer)

0 %

–

Retraction Distance

1.0 mm

Direct drive

Retraction Speed

30 mm/s

–

Nozzle Type

Hardened steel

Required — fitted as standard on this printer

Dry Filament

70 °C for ≥ 5 h

print from a dry box in humid weather

Enclosure

Not required

Not required — helps in a cold or draughty room

Support Material

PETG-CF (self-supporting)

–

Printing Notes

Carbon fibre makes PETG-CF far stiffer than plain PETG and almost eliminates stringing, but it is abrasive — hardened steel nozzle only.

The fibre also kills the glossy PETG finish. Expect a flat matte surface; that is the material behaving correctly, not a settings fault.

The X1C ships with a hardened steel nozzle and a fully enclosed chamber, so it needs none of the modifications other machines do for this material.

Bambu Studio's own generic profile is a reasonable starting point, but its temperatures are set for Bambu filament — use the figures above for OzFDM spools.

Slicer: Bambu Studio / OrcaSlicer. Dry the filament at 70 °C / ≥ 5 h before a long print — every figure above assumes dry filament.

Troubleshooting

Intermittent under-extrusion — Fibre packing in the nozzle. Dry the filament, then cold-pull. A 0.6 mm hardened nozzle largely prevents it.

Brittle, snappy parts — PETG-CF trades elongation for stiffness — elongation at break drops from about 11 % to 8 %. Design around it rather than tuning for it.

Layer adhesion worse than plain PETG — Raise the nozzle to 250 °C and cut cooling to 30 %.