¶ Filament Buffer
The filament buffer is installed in the printer’s top cover and consists of two sliders, two springs, and a buffer connection board.
The spare parts for the filament buffer include the following:
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Filament buffer * 1
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BT3x8 screw * 4
¶ When to Use
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The AMS is malfunctioning, and upon inspection, the filament buffer is visibly damaged.
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After analysis by Bambu Lab technical support, it is confirmed that the filament buffer needs to be replaced.
¶ Tools and Materials Needed
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New filament buffer
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H2.0 Allen key
Specifications and quantities of screws involved in replacing the H2D filament buffer (it is recommended to keep the removed screws properly to avoid loss):
| Specification | Image | Use | Position | Quantity | |
|---|---|---|---|---|---|
| BT3x8 | Fix the filament buffer |  |
4 |
¶ Safety Warning
IMPORTANT!
It's crucial to power off the printer before conducting any maintenance work, including work on the printer's electronics and tool head wires. Performing tasks with the printer on can result in a short circuit, leading to electronic damage and safety hazards.
During maintenance or troubleshooting, you may need to disassemble parts, including the hotend. This exposes wires and electrical components that could short circuit if they contact each other, other metal, or electronic components while the printer is still on. This can result in damage to the printer's electronics and additional issues.
Therefore, it's crucial to turn off the printer and disconnect it from the power source before conducting any maintenance. This prevents short circuits or damage to the printer's electronics, ensuring safe and effective maintenance. For any concerns or questions about following this guide, we recommend submitting a technical ticket regarding your issue and we will do our best to respond promptly and provide the assistance you need.
¶ Remove the Filament Buffer
¶ Step 1: Remove the AP board cover
Use an H2.0 Allen key to loosen 1 fixing screw (BT2.6x8), and then remove the AP board cover from the side near the front door.
¶ Step 2: Disconnect the PTFE tube
- Press the pneumatic connector on the back of the printer to disconnect the two PTFE tubes from the filament buffer.
- Push the buffer slider to the far right, then press the pneumatic connector and disconnect the two PTFE tubes connected to the toolhead one by one.
¶ Step 3: Remove the filament buffer
Use an H2.0 Allen key to remove the 4 fixing screws (BT3x8) securing the filament buffer. Press both sides of the buffer connector to unlock the clip, then unplug the connector and remove the buffer.
Note: When removing the fixing screws, hold the buffer with your hand to prevent it from falling.
¶ Install the filament buffer
¶ Step 1: Connect the cable and secure the buffer
Reconnect the buffer cable to the filament buffer. Use an H2.0 Allen key to tighten the 4 fixing screws (BT3x8).
¶ Step 2: Reinstall the AP board cover
Note: Before installing the AP board cover, it is necessary to check whether the cables are obstructing the PTFE piping. Avoiding such obstruction will prevent any interference with the subsequent installation of the PTFE piping.
First, snap the AP board cover back from the side close to the back of the printer, press the two places indicated by the arrows into place, flush with the buffer on the right side and flush with the cable cover on the bottom, and then tighten a fixing screw (BT2.6x8) using an H2.0 Allen key.
¶ Step 3: Reconnect the PTFE tubes on the back of the printer
Reconnect the two PTFE tubes from the toolhead to the filament buffer one by one, then reconnect the PTFE tubes on the back of the printer to the filament buffer.
¶ Verify the Functionality
Power on the printer and initiate a print using the AMS to check if it prints normally. If the print completes successfully, the replacement is successful.
If unsuccessful, check if the buffer cable and PTFE tubes are correctly connected and try again.
If the issue persists, contact Bambu Lab technical support for further assistance.
¶ End Notes
We hope the detailed guide provided has been helpful and informative.
If this guide does not solve your problem, please submit a technical ticket, we will answer your questions and provide assistance.
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