¶ Extruder Filament and Cutter Sensor Assembly
This sensor is used in the Extruder to detect the presence of the filament, and also detect the Filament Cutter lever.
¶ When to use this guide
- The cable is damaged;
- There are false reports of unloading failure;
- There are false reports of the cutter being stuck.
¶ Tools and materials needed
A new extruder filament and cutter sensor assembly
H1.5 hex key
¶ Screws list
| Model | Position | Drawing | |
| Screw A | BT2*5 | The base |
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| Screw B | MG2.5*13 | Cutter lever |
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¶ Safety warning and Machine state before starting operation
Unload the filament and power off the printer.
¶ Operation guide
¶ Step 1 - Open the front housing
Turn off the printer, open the front housing, and hang it over on the carbon rod.
¶ Step 2 - Disconnect the PTFE tube and loosen the cutter lever
Press the tube bracket, disconnect the PTFE tube, and loosen the cutter lever screw (screw B) with the H1.5 hex key to release the lever.
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¶ Step 3 - Disconnect the cables
Disconnect the hotend heater, hotend fan, and NTC resistor cables to expose the sensor's connector. Heat the silicone glue with a hair dryer, and then disconnect the cable.
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¶ Step 4 - Remove the sensor assembly
Remove 2 screws (screw A) with an H1.5 hex key, extend the hex key into the pneumatic connector to pry the assembly loose, and then remove sensor assembly.
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¶ Step 5 - Install the sensor assembly
Press the pneumatic connector on the sensor assembly to install it in place, and then lock in 2 screws (screw A) to fix it.
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¶ Step 6 - Connect cables
Connecting the sensor cable, it is recommended to apply silicone glue to reinforce this connector. Then connect the hotend NTC cable, hotend fan cable and hotend heater cable in sequence.
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¶ Step 7 - Lock the cutter lever, insert the PTFE tube, and close the front housing
Hold up the cutter lever by hand, slide the cutter into the slot, tighten the lever screw (screw B), reinsert the PTFE tube, and then close the front housing.
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¶ How to verify
Turn on the power of the printer, manually load filaments (or load filament via the AMS), and then perform unloading. If it can be completed normally, it means that the replacement was successful. Otherwise, check the connections, and try it again. If still you have errors, contact the service team for solution advice.