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Bambu Lab Filament Track Switch
The Bambu Lab Filament Track Switch is a filament switching module for the X2D, eliminating the fixed binding between AMS units and nozzles. Once installed, any filament in any connected AMS can be freely routed to either the left or right nozzle—as assigned by the slicer. Combined with Dynamic Mapping support in Bambu Studio, the slicer can intelligently reallocate filaments between nozzles layer by layer to minimize purging waste and reduce overall print time.
Note: Only compatible with Bambu Lab X2D. Support for H2C and H2D is planned for later in 2026.
Key Features:
- Removes fixed AMS-to-nozzle binding — any filament can be fed to any nozzle
- Dynamic Mapping support for layer-by-layer nozzle assignment in Bambu Studio
- Reduces purging waste and print time compared to static AMS routing
- Supports up to 4 AMS 2 Pro + 8 AMS HT units simultaneously (via 4-in-1 PTFE adapter)
- 2 filament inputs, 2 filament outputs — designed for dual-nozzle workflows
- Compatible with Bambu Lab X2D
Important information before purchase
- The Filament Track Switch is currently only compatible with X2D. Support for H2C is expected during Q2 2026, while support for H2D is expected in the second half of 2026.
- After installing the Filament Track Switch, the number of connectable AMS units depends on the printer's supported AMS expansion limit. Refer to the official specifications for the respective printer model for details.
- For dual-nozzle printers (such as X2D), a single AMS can still support dual-nozzle printing and enable filament switching between the left and right hotends using the Filament Track Switch. However, when only one AMS is connected, the left and right hotends only support alternating feeding — not simultaneous feeding. When switching, the AMS must first unload the filament and then reload it.
Eliminate manual filament regrouping
Dual-extruder 3D printers significantly increase the speed of multi-color printing by reducing the purge time required by single-extruder machines. Traditionally, this required manually swapping spools between AMS units to ensure filaments reached the correct nozzle. With the Filament Track Switch, those days are over. It intelligently routes any filament from your AMS units to the nozzle assigned by the slicer, giving you full hardware flexibility and faster prints.
Without Filament Track Switch
With Filament Track Switch
Dynamic mapping for maximum efficiency
The Filament Track Switch frees the AMS from specific nozzles and allows any filament to be fed into any nozzle regardless of configuration. This enables dynamic filament mapping and allows for color reallocation mid-print, significantly increasing multi-color printing efficiency.
Installation Guide
Please refer to the installation guide for the Filament Track Switch on the Bambu Lab Wiki. For a visual walkthrough, we also recommend watching the step-by-step installation video.
Package Contents
| Item | Quantity |
|---|---|
| Filament Track Switch | 1 |
| 6-pin cable | 1 |
| PTFE tube (700 mm) | 2 |
| PTFE tube (400 mm) | 2 |
| ST3x10 screws | 4 |
| BT2x8 screws | 2 |
Product Specifications
| Specification | Details |
|---|---|
| Materials | Plastic, metal |
| Color | Black |
| Package Size | 150 × 110 × 50 mm |
| Package Weight | 60 g |
FAQ - Frequently Asked Questions
- What is the maximum number of AMS units that can be connected when the filament track switch is installed on the X2D printer?
A: The number of AMS units that can be connected to the printer is independent of whether the filament track switch is installed. Therefore, the X2D supports up to 4 AMS 2 Pro and 8 AMS HT units simultaneously — a total of 12 units with 24 slots — connected via the 4-in-1 PTFE adapter.
- Can the 4-in-1 PTFE adapter be used when only two AMS units are connected?
A: It is strongly advised against using the 4-in-1 PTFE adapter with only two AMS units, as the extra resistance during loading and unloading can affect print reliability.
- 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, which prevents the filament track switch from dynamically mapping filament from the AMS to the two extruders. Therefore, if you need to print with an external spool, the filament track switch must be removed.
- Are there filament restrictions when using the filament track switch?
A: Certain filament types — such as PLA-CF, PLA Glow, and PLA Silk — are more sensitive to feeding resistance and may fail during loading or unloading. It is recommended to avoid these filaments through the switch. If problems occur and the print needs to continue, you can try the following:
- Manually move the problematic filament to another AMS slot
- Use the officially recommended PTFE tube length
- Position the AMS units as recommended in the official guidelines
If problems persist, the filament track switch should be disabled for the current print job.
- What should I do if the filament track switch becomes clogged?
A: If the filament track switch becomes clogged, refer to the filament track switch disassembly and troubleshooting guide to clear the blockage.
- What should I do if the filament gets stuck at the output of the filament track switch?
A: If the filament gets stuck at the output of the filament track switch, you can try the following solutions:
- Reconnect the PTFE tube between the filament track switch and the filament buffer
- Install the locking clip for the pneumatic connector at the output of the filament track switch
- Replace the PTFE tube between the filament track switch and the filament buffer
- Can the printer perform calibration using the filament track switch?
A: Currently, high-precision nozzle offset calibration cannot be performed after the filament track switch is installed on the X2D. To perform this calibration, the switch must first be removed to restore the printer to its original state without the switch. A future firmware update is expected to address this limitation.