ASA-CF (Carbon Fibre ASA) on Bambu Lab H2D

Nozzle Temp

270 °C

Range: 250 – 280 °C

Bed Temp

110 °C

Range: 100 – 120 °C

Print Speed

50

mm/s · max 60

Layer Height

0.20

mm · max 0.28

Fan Speed

10 %

1st layer: 0 %

1st Layer Speed

20

mm/s

Retraction

0.8 mm

@ 30 mm/s

Nozzle Type

Hardened

Required

Retraction Note

• Carbon fibre cuts stringing, so leave retraction at 0.8 mm. Longer retractions add clog risk with fibre-filled filament.

Settings

Recommended

Range

Nozzle Temperature

260 – 275 °C

250 – 280 °C

Bed Temperature

100 – 110 °C

100 – 120 °C

Print Speed

40 – 60 mm/s

data sheet: 40 – 60 mm/s

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)

0 – 20 %

–

Fan Speed (1st Layer)

0 %

–

Retraction Distance

0.8 mm

Direct drive

Retraction Speed

30 mm/s

–

Nozzle Type

Hardened steel (required)

0.6 mm is ideal, 0.4 mm works, never 0.2 mm

Dry Filament

80 °C for at least 5 h

dry thoroughly before every long print

Enclosure

Required, door closed

chamber heating off for small parts, 60 °C for large parts (H2D maximum 65 °C)

Support Material

HIPS, ASA-CF (interface)

–

Printing Notes

ASA-CF is abrasive, so print it only through a hardened steel nozzle. The H2D's stock 0.4 mm nozzles are hardened steel, but check any hotend you have swapped in.

OzFDM suggests a 0.6 mm hardened steel nozzle as the ideal size for ASA-CF, since a larger nozzle is less prone to fibre clogs. The figures above are for 0.4 mm. Do not use a 0.2 mm nozzle.

Our ASA-CF product page and Bambu Lab both advise against running third-party carbon fibre filament through the AMS, so feed it from an external spool holder or a sealed dry box. Parts are stiffer but more brittle than plain ASA, so handle spools and prints with care.

ASA-CF gives off fumes while printing. Keep the door closed, print in a ventilated room and use air filtration. For large parts, set the chamber to about 60 °C in the Bambu Studio filament settings.

Slicer: Bambu Studio. Start from the Generic ASA filament preset and set the temperatures above. Every figure assumes dry filament, so dry at 80 °C for at least 5 h before a long print.

Troubleshooting

Intermittent under-extrusion or a partial clog: Fibre is packing in the nozzle. Dry the filament, clear the nozzle with a cold pull, and consider a 0.6 mm hardened steel nozzle.

Filament snaps in the feed path: ASA-CF is more brittle than plain ASA. Dry it and avoid tight bends in the PTFE tube.

Warping on long parts: Keep the bed at 110 °C, turn on chamber heating at 60 °C, add a brim and let the chamber warm up before the first layer.