¶ Fault Description
After the AMS filament unloading process is completed, the filament has been pulled back to the AMS, but the Hall switch of the extruder still detects the filament. At this time, the printer will determine that the filament is broken inside the extruder. The extruder filament sensor (feeder Hall switch) consists of a magnet and a Hall sensor. When the filament is inserted, it will push the magnet to move closer to the Hall sensor. When the filament is withdrawn, the magnet will automatically spring back. The printer judges whether the filament is inside the extruder based on the detected Hall value.
If the AMS has driven the filament to retract, but the extruder filament sensor still detects the filament continuously, an alarm will be triggered.
Possible Causes:
- There is a broken filament at the extruder filament sensor, causing the sensor to remain in the "on" state.
- The torsion spring of the extruder filament sensor's magnet is stuck and cannot spring back smoothly. As a result, even if there is no broken filament, the magnet remains close to the Hall element, leading to a false judgment of broken filament.
¶ Troubleshooting
¶ Tools, Equipment and Materials
- H2.0 Hex Key Wrench
- H1.5 Hex Key Wrench
¶ Troubleshooting Measures
Users can adjust the order of each troubleshooting measure as appropriate.
¶ Step 1. Disconnect the PTFE Tube
Press the black outer ring to disconnect the PTFE Tube.
¶ Step 2. Manually Insert the Filament and Check if the Hall Switch Magnet Can Spring Back Smoothly
Refer to Step 2 in the Wiki and use an H2.0 hex key wrench to remove 2 screws. It should be noted that do not pull hard when removing the extruder filament sensor assembly, and handle it with care when placing it to avoid damaging the black FPC cable.
¶ Step 3. If It Does Not Spring Back, Disassemble to Check Whether the Small Magnet Is Stuck by Debris and Clean It
If the magnet fails to spring back, disassemble the assembly to check if the small magnet is stuck by debris, and clean the debris.
¶ Step 4. If the Abnormality Persists After Cleaning, Replace the Extruder Filament Sensor Assembly with Reference to the Wiki
If the abnormality still exists after cleaning, refer to the Wiki to replace the extruder filament sensor assembly.
¶ 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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