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.

Bambu Lab advises against running third-party carbon fibre filament through the AMS, so feed it from the external spool holder. 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.