¶ What is the AMS internal filament hub
The internal filament hub is the material selection device (4-in 1-out) of the AMS, which is responsible for sending the specified filament to the printer, and pulling the filament that has been sent to the printer back to the AMS.
¶ When to use
Filament is stuck in the filament hub, all the PTFE tubes check OK and are well connected.
¶ Tools and materials needed
New filament hub, H2.0 & H1.5 allen keys
¶ Safety warning and Machine state before starting operation
Turn power OFF to the printer and disconnect the AMS connection with the printer.
¶ Operation guide
¶ Step 1 - Disconnect the PTFE tube
Open the AMS cover, press the button on the filament hub and pull out the PTFE tube.
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¶ Step 2 - Remove 2 screws
Remove 2 screws, and then flip the middle frame upward.
¶ Step 3 - Remove the middle frame module
Disconnect the bambu bus cable and the power cable, and remove the middle frame module.
¶ Step 4 - Disconnect the 4 PTFE tubes
Depress the plastic couplers to disconnect the 4 PTFE tubes.
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¶ Step 5 - Remove 4 screws
Remove 4 screws, and turn the filament hub assembly over.
¶ Step 6 - Disconnect 3 cables
Disconnect the motor cable, the hall cable and the speed measuring cable, and then remove the filament hub assembly.
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¶ Step 7 - Remove the motor unit
Remove 2 screws, and then remove the motor unit.
¶ Step 8 - (Assembly) Install the motor unit
Install the motor unit to the filaments hub according to the positioning post and screw holes.
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¶ Step 9 - Install 2 screws
Lock the motor unit with 2 screws.
¶ Step 10 - Connect 3 cables
Connect the motor cable, the hall cable and the speed cable.
¶ Step 11- Install the internal filament hub
Install the filament hub assembly to the middle frame, and lock in 4 screws.
¶ Step 12 - Connect 4 PTFE tubes
Arrange the cables, and connect the 4 PTFE tubes.
¶ Step 13 - Install the middle frame
Place the middle frame into the AMS shell, connect the bambu bus cable and power cable.
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¶ Step 14 - Lock 2 screws
Install the middle frame in place, and lock with 2 screws.
¶ Step 15 - Connect the PTFE tube
Check the tube bracket, and insert the PTFE tube, try to pull it out to make sure that the tube is well connected.
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¶ How to verify completion/success
Connect the AMS to the printer and turn power ON. Load filament to all slots of the AMS and click "Load" on the screen to start loading the filament.
After the filament in slot 1 loads, choose AMS slot 2 to load the filament in slot 2, and then load filament in slot 3 & slot 4.
If all the loading process functions OK, the replacement is complete and successful.
Otherwise, check the connections of all the cables and PTFE tubes. If no errors are found and malfunction continues, contact the Bambu Lab service team for further assistance.