AMS Setup & Filament Loading

The AMS (Automatic Material System) holds up to four spools and feeds whichever one your print calls for through a shared PTFE path into the toolhead.

Loading a spool

Open the AMS lid and insert the spool so filament unwinds in the correct direction (the AMS will tell you if it's backwards during load).
Feed the tip of the filament in until the AMS's internal rollers grab it — you'll feel it pull in on its own.
Confirm on the Bambu Handy app or the printer's screen that the slot shows the correct material and color; set them accurately, since calibration and settings depend on this.

Materials that should skip the AMS

Warning: TPU (flexible) and PA/PA-CF (nylon) filaments are prone to jamming or excess friction in the AMS's long PTFE path. Load these direct-to-toolhead using the printer's side filament port instead.

First-time tips

Keep a silica gel desiccant pack in each AMS bay — the enclosed AMS still lets in ambient humidity over weeks.
If a spool feeds in slowly or struggles, check that the spool sits freely on its spindle and isn't binding against the AMS wall.
After loading all four slots, run a filament calibration for any material you haven't used before — this measures flow dynamics specific to that spool.

See AMS Filament Jams & Loading Failures if a slot won't load or unload correctly.