¶ Applicable models of printers
AMS 2 Pro (Hereinafter referred to as AMS)
¶ AMS 2 Pro Filament Hub Unit
The AMS Filament Hub Unit is the filament feeding device (4 in and 1 out) of AMS. It opens the corresponding feed port according to the currently selected filament position and assists in delivering the filament to the printer. It also has the function of assisting in pulling the printing filament that has been delivered to the printer back to AMS.
¶ AMS 2 Pro Internal Hub Motor
The AMS Internal Hub Motor is used to power the operation of the AMS filament hub.
¶ When to use?
Printing filament frequently gets stuck in the AMS filament hub, and all PTFE tubes are checked and connected properly. Or after-sales technical support determines that the fault is with the AMS filament hub.
¶ Tools and materials needed
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New AMS 2 Pro Power Board
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H2.0 Allen key
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H1.5 Allen key
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20 minutes
¶ Screws List
¶ 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.
Before starting, make sure the AMS is disconnected from the printer.
¶ Remove the Filament Hub Unit and Motor
¶ Step 1 - Remove the PTFE tube on the back of the AMS
Press the PTFE tube release button from the back of the AMS to unlock the fitting, then pull the PTFE tube out from the back of the AMS.
¶ Step 2 - Pull out the PTFE tube release button
Pinch the clip from the inside of the lower cover to automatically pop open the PTFE tube release button, and then pull out the PTFE tube release button from the back of the AMS.
When squeezing the buckle, use your other hand to hold the PTFE tube from the back of the AMS to release the switch to prevent the spring from being ejected and lost.
¶ Step 3 - Remove the AMS main frame assembly
Remove the driven support sleeve assembly of the two middle slots to expose the two screw holes. When removing the bearing sleeve, be careful with the bearings at both ends to avoid losing them.
Remove the two screws A that secure the AMS main frame.
Lift the rear part of the main frame completely and place it vertically on the lower cover of the AMS. Note that there are cables connected, so do not operate violently. When lifting, it is recommended to lift the front part of the main frame first, and then push it forward to make room for the rear part of the frame.
When placing the AMS main frame vertically, avoid the electronic components of the vent to prevent them from being crushed.
Unlock the plug buckle, unplug the signal cable and power cable on the AMS power board, and lift out the AMS main frame assembly as a whole.
¶ Step 4 - Disconnect the 4 PTFE tubes
Press the buttons on the quick couplers one by one to unlock the connection and disconnect the 4 PTFE tubes.
¶ Step 5 - Remove the filament hub unit
Remove the 3 screws, then pull out the filament hub unit and disconnect the 3 plugs of the motor cable, hall sensor cable, and mileage speed measurement cable.
After removing the filament hub, be sure to store the 2 shock-proof silicone gaskets to prevent loss.
¶ Step 6 - Remove the AMS internal hub motor
Remove the 2 screws and then remove the AMS internal hub motor. When removing the motor, it is recommended to remove the extrusion wheel and bearing together to prevent loss.
When setting the spare parts, we have added the extrusion wheel and bearing to the extruder motor single product and filament hub.
¶ Install the Filament Hub Unit and Motor
¶ Step 1 - Install the AMS internal hub motor
Put the extrusion wheel on the extruder motor in the correct plane direction.
Install the bearing back into the slot of the filament hub, then install the extruder motor back into the filament hub according to the screw holes and screw in 2 screws.
When installing the extruder motor, pay attention to the direction to ensure that the words Bambu Lab and FAM013 can be seen; the direction of the motor plug is facing the mainboard, which means it is installed correctly.
¶ Step 2 - Install the filament hub unit
Install the shock-proof gasket, aligning the groove of the gasket with the edge of the filament hub.
When reinstalling the filament hub, you can use your other hand to push the PTFE tube from the back to facilitate snapping the filament hub into place and aligning it with the screw hole. When installing, pay attention to the shock-proof silicone strips on the filament hub to prevent missing any.
After screwing in the 3 screws, plug in the 3 plugs for the motor cable, Hall cable, and mileage speed measurement cable, and organize the cables.
¶ Step 3 - Connect 4 PTFE tubes
Connect the 4 PTFE tubes to the filament hub one by one.
¶ Step 4 - Install the main frame assembly and driven support sleeve assembly
Install the AMS main frame assembly into the AMS lower cover and connect the signal cable and power cable to the AMS power board.
After the AMS main frame is installed in place, tighten the two screws to secure it.
Install the two middle driven support sleeve assemblies, making sure that the bearings on both ends of all support shafts are pressed into place.
¶ Step 5 - Install the PTFE tube release button
Press the PTFE tube release button back into the housing in the following direction, insert the buckle into the corresponding slot smoothly, and keep the black silicone housing embedded flat.
¶ Step 6 - Connect the PTFE tube
Check to make sure that the PTFE tube silicone bracket is aligned with the filament hole of the filament hub unit, and push the PTFE tube from the rear of the AMS. After installation, pull the PTFE tube to confirm that the PTFE tube is fixed.
¶ Calibration
Connect the power cable, connect the AMS to the printer, turn on the power, and start using the AMS to load filaments through the operation on the screen. If the loading can be completed and no error prompts appear during the entire loading process, the replacement is successful.
Otherwise, please check all connections and try again. If the problem persists, please contact Bambu Lab service team 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.
If you have any suggestions or feedback on this Wiki, please leave a message in the comment area. Thank you for your support and attention!