X2D: AMS A/B routing mixed up – slots 1-4 and 5-8 not assigned correctly

Bambu Lab X Series Bambu Lab X2D
1

Hi everyone,

I have an issue with my X2D regarding the AMS-to-nozzle assignment.

To explain: on the X2D, slots 1–4 are assigned to AMS A (nozzle A) and slots 5–8 to AMS B (nozzle B). In my case this assignment does not work as expected – the slots do not behave according to this logic.

This means I have to figure out every time while slicing which slot actually controls which nozzle, instead of being able to rely on the expected 1–4 / 5–8 split. This makes reliable multi-material printing very difficult.

My setup:

  • Bambu Lab X2D

  • Two older-generation AMS units connected (not the newer AMS 2 Pro)

What I have already tried:

  • Full recalibration of the printer

  • Factory reset and completely fresh setup

My questions:

  1. Has anyone else experienced this swapped AMS slot/nozzle assignment on the X2D?

  2. Is this a known firmware issue?

  3. Is there a setting in Bambu Studio or on the printer to correct the assignment?

Any help appreciated!

Christian