¶ Issue Description
extrusion force sensors are installed above both the left and right hotends of the toolhead to sense the extrusion force of the hotend. These sensors play a critical role in functions such as homing, leveling, nozzle Z offset calibration, and dynamic flow calibration. When the frequency of the extrusion force signal of the right extruder is too high, the heatbed will descend a short distance, then automatically cancel the print task and display an error message.
Possible causes of the issue include:
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The extrusion force sensor is too close to the right hotend heatsink.
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The extrusion force sensor is damaged.
Right extrusion force sensor:
Right hoend heatsink:
¶ Troubleshooting
¶ Tools, Equipment and Materials
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H2.0 Allen key
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H1.5 Allen key
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Flat-head tweezers
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Silicone
¶ Fault Isolation Process
¶ Solutions
Users may adjust the order of these solutions as needed.
¶ Step 1. Reinstall the right hotend
Check and ensure the nozzle is firmly seated against the hotend heater, and the locking clip is securely fastened to prevent the hotend from loosening.
Perform Step 5 for the homing test. If the test fails, proceed to Step 2.
¶ Step 2. Swap the left and right hotends
Swap the left and right hotends, then perform the centering test for the right hotend.
If the test is successful, it indicates an issue with the hotend. Replace the hotend. If the test fails, proceed to Step 3.
¶ Step 3. Check the eddy current coil of the extrusion force Sensor for damage
Remove the right hotend. Use a phone to take a photo of the eddy current coil position of the extrusion force sensor (as shown below). Check if the coil is exposed or damaged. If the coil is damaged, proceed to Step 4 to replace the right extrusion force sensor.
¶ Step 4. Replace the Right extrusion force Sensor
Refer to the Wiki How to Disassemble and Assemble H2D Toolhead Steps 1 to 13 to complete the replacement of the right extrusion force sensor.
¶ Step 5. Homing test
Click the screen to re-initiate the homing process. If the HMS does not repeat, the troubleshooting is successful.
If the above solutions do not resolve the issue, submit a ticket and upload the printer’s log files.
¶ 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, 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!