Bambu Lab Filament Track Switch

1. When the filament track switch is installed on the X2D printer, how many AMS units can be connected at most?

A: The number of AMS units the printer can connect to is independent of whether the filament track switch is installed, so the X2D supports up to 4 AMS 2 Pro and 8 AMS HT units simultaneously—12 units with 24 slots in total—linked via the 4-in-1 PTFE adapter.

2. Can the 4-in-1 PTFE adapter be used when only two AMS units are connected?

A: Using the 4-in-1 PTFE adapter with just two AMS units is strongly discouraged; the extra resistance during loading and unloading can compromise print reliability.

3. Can the filament track switch be connected to an external spool?

A: No. When using an external spool, it will permanently occupy one extruder channel, making the filament track switch unable to dynamically map filament from the AMS to the two extruders. Therefore, if you need to print with an external spool, you need to remove the filament track switch.

4. Are there filament restrictions when printing with the filament track switch?

A: Certain filaments—such as PLA-CF, PLA Glow, and PLA Silk—are more sensitive to feed resistance and may fail to load or unload. Avoid using these filaments through the switch. If problems occur and printing must continue, try:

• Manually moving the problematic filament to another AMS slot;
• Using the officially recommended PTFE tube length;
• Arranging the AMS units as advised in the official guidelines.

If issues persist, disable the filament track switch for the current print job.

5. What should I do if the filament track switch is clogged?

A: If the filament track switch is clogged, please refer to filament track switch disassembly and troubleshooting guide to clear the clog.

6. What should I do if the filament gets stuck at the filament track switch outlet?

A: If the filament gets stuck at the filament track switch outlet, you can try the following solutions:

• Reconnect the PTFE tube between the filament track switch and the filament buffer.
• Install the pneumatic connector locking tab on the filament track switch outlet.
• Replace the PTFE tube between the filament track switch and the filament buffer.

7. Can the printer perform calibration when using the filament track switch?

A: Currently, after installing the filament track switch on the X2D, high-precision nozzle offset calibration cannot be performed. To run this calibration, you must first remove the switch and restore the printer to its state without the switch. A future firmware update will resolve this limitation.