¶ Applicable models
AMS 2 Pro (Hereinafter referred to as AMS)
This article takes one of the heating units (slots 1 and 2) as an example. The disassembly and assembly methods of the other heating unit is exactly the same.
¶ AMS 2 Pro heating unit
The AMS heating unit is a component for drying filaments inside the AMS, consisting of a heater, a fan, and an NTC temperature sensor.
¶ When to use?
The filament is dried abnormally, and an HMS error message appears, indicating that the module needs to be replaced, or the after-sales technical support team determines that the module needs to be replaced after diagnosing the fault.
¶ 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 heating unit
¶ 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 cables and remove screws
Unplug the 3 plugs of the heating unit heater, fan and NTC from the connector on the mainboard, remove the cables from the clips, and remove the 4 screws.
¶ Step 5 - Remove the heating unit
The heating unit is fixed by 4 screws and 2 clips. After removing the 4 screws, use a tool to gently pry the plastic frame near the buckle to unlock the buckle. It is recommended to pry open the buckle near the RFID coil first. After prying it open, hold the heating unit with your hand, then pry up the other clip, and finally remove the heating unit.
¶ Install the heating unit
¶ Step 1 - Install the heating unit
Install the heating unit onto the AMS main frame, align the 4 screw holes, and press down slightly to insert the left and right clips into the side walls of the frame. When installed in place, you can hear a slight "click" sound.
¶ Step 2 - Connect cables and tighten screws
Connect the 3 plugs of the heating unit heater, fan and NTC to the connector on the mainboard, arrange the cables, and tighten the 4 screws.
¶ Step 3 - 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 4 - 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 5 - 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!