Engineering Filament

You need a 300°C+ hotend with Hardened Steel Nozzle and Extruder Gears, an enclosed chamber (P1S/X1C/H2), and an Engineering Plate with specialized adhesive (Magigoo/Nano Polymer). Pre-heat the bed at 100°C for 30 minutes to raise chamber air temps.

Printing wet engineering polymers causes chemical hydrolysis, reducing mechanical strength by 50%. Dry PC at 80°C for 8–12 hours; dry PA/PAHT at 80–90°C for 12 hours in a dedicated dryer before printing from an airtight container.

Disable auxiliary cooling fans completely and keep part fans below 20%. Set chamber exhaust fans to minimum (10–20%), pre-heat the enclosure above 45°C, and use a 5–10mm brim with zero brim gap in Bambu Studio.

Yes. Chopped fiber strands act as internal micro-files. A standard brass or stainless nozzle will erode from 0.4mm to over 0.7mm within 300 grams of printing. A Hardened Steel Nozzle and Hardened Steel Extruder Gears are mandatory.

PLA-CF and PETG-CF work in the AMS (though they increase PTFE wear over time). Stiff structural engineering composites (PA-CF, PET-CF, PPA-CF) will snap or abrade internal AMS selectors—feed these directly from an external dry box.

While high-quality composite filaments run on 0.4mm hardened nozzles, 0.6mm Hardened Steel Nozzles are recommended for heavy fiber loading or continuous printing to eliminate micro-clogging and increase throughput.