¶ Extruder Filament and Cutter Sensor - Extruder hall switch board 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?
This guide can be used when the Extruder Filament and Cutter Sensor is not working as expected and needs to be replaced.
¶ Tools and materials needed
1x H1.5 hex key
List of screws used for the parts in this guide
| Model | Position | Drawing | |
| Screw A | BT2*05 | The base |  |
| Screw B | MG2.5*13 | Cutter lever |  |
¶ Safety Warning
IMPORTANT!
It's crucial to power off the printer before performing any maintenance work on the printer and its electronics, including tool head wires, because leaving the printer on while conducting such tasks can cause a short circuit, which can lead to additional electronic damage and safety hazards.
When you perform maintenane or troubleshooting on the printer, you may be required to disassemble some parts, including the hotend. This process can expose wires and electrical components that could potentially short circuit if they come into contact with each other or with other metal or electronic components while the printer is still on. This can damage the electronics of the printer and cause further damage.
Therefore, it's essential to switch off the printer and disconnect it from the power source before doing any maintenance work. This will prevent any short circuits or damage to the printer's electronics. By doing so, you can avoid potential damage to the printer's electronic components and ensure that the maintenance work is performed safely and effectively.
If you have any concerns or questions about following this guide, open a new ticket in our Support Page and we will do our best to respond promptly and provide you with the assistance you need.
¶ Remove the faulty sensor
¶ Step 1 - Take out the filament from the extruder and PTFE Tube
Before removing the sensor, and moving to step 2, ensure that there is no filament in the PTFE tube or the sensor.
¶ Step 2 - Remove the front housing
Remove the front housing and disconnect the part cooling fan cable, then place the front housing away.
Make sure to pull on the connector, and not on the wires, to avoid damage.
¶ Step 3 - Disconnect the PTFE tube and loosen the cutter lever
Disconnect the PTFE tube, press on the tube bracket as shown in the picture then remove the PTFE tube.  PTFE connector |
Loosen the cutter lever screw (screw B) with the H1.5 hex key to release the lever. Screw loosened on the Filament Cutter |
¶ Step 4 - Disconnect the flex cable
Disconnect the hall switch board cable, then remove the cable fixing tape Filament Sensor ribbon cable and tape |
Remove the 2 screws shown in the picture (screw A) with an H1.5 hex key. Filament Sensor screws installed on the extruder |
¶ Step 5 - Remove the Extruder Filament Sensor
Using the hex key, insert it into the PTFE connector and push it towards the left side of the extruder to loosen it.  Hex tool used to push the filament sensor away from the extruder |
Remove the Extruder Filament Sensor from the extruder.  Filament sensor being removed from the extruder |
¶ Install the new sensor
¶ Step 1 - Install the new Extruder Filament Sensor
Press the pneumatic connector on the hall switch board assembly to install it in place, and then lock in 2 screws (screw A) to fix it.
Press on the PTFE tube connector of the sensor to install it in place Extruder Filament Sensor |
Re-install the screws removed in step 4 from the disassembly process. Filament Sensor screw location |
¶ Step 2 - Connect the flex cable
Align the connector and connect the sensor cable to the tool head board as shown in the image below Filament Sensor connector on the TH board |
Fix the ribbon flex cable in place using the tape, to avoid it getting damaged. Taple covering the ribbon cable |
¶ Step 3 - Lock the cutter lever
Hold up the cutter lever by hand then slide the cutter into the slot, and tighten the lever screw (screw B) as shown in the picture below.
Filament Cutter screw
¶ Step 4 - Connect the PTFE tube and close the front housing
Insert the PTFE tube into the connector, connect the part cooling fan cable, and close the front housing.
Insert the PTFE tube back into the connector, and re-connect the front housing cable as shown in the image below.  PTFE Tube and Front Housing cable installed |
Re-attach the front housing to the print head Tool head cover attached |
¶ Verify the functionality
Turn on the printer and load filament to the print head (manually, or using the load filament option for the AMS), then also try to unload the filament.
If the process works as expected, then the new extruder filament sensor is working as expected. Otherwise, check the connections, and try it again.
¶ Calibration step after the operation
For the Extruder Filament Sensor, there is no need to perform any calibration or operation before using the printer.
¶ End Notes
We hope that the detailed guide we shared with you was helpful and informative.
We want to ensure that you can perform it safely and effectively. If you have any concerns or questions regarding the process described in this article, we encourage you to reach out to our friendly customer service team before starting the operation. Our team is always ready to help you and answer any questions you may have.
Click here to open a new ticket in our Support Page.
We will do our best to respond promptly and provide you with the assistance you need.