¶ Issue Description
When the right extruder is performing homing, leveling, or Z offset calibration, an error is triggered if the extrusion force sensor detects a signal with excessively low frequency. In this case, the heatbed will descend a short distance, then automatically cancel the task and display an error message.
Possible causes of the issue include:
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Hotend not installed: The hotend is not correctly installed, preventing the sensor from detecting a valid signal.
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Right extruder and hotend not properly installed: Improper installation of the hotend results in excessive distance between the hotend heatsink and the sensor, affecting signal detection.
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Severe deformation of hotend heatsink: Deformation of the heatsink may cause abnormal sensor signal detection.
 Extrusion force sensor of the right extruder |
 Nozzle heatsink |
¶ Troubleshooting
¶ Tools, Equipment and Materials
None
¶ Solutions
Users may adjust the order of these solutions as needed.
¶ Step 1. Check the installation status of the right hotend
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If the hotend is not installed, reinstall it.
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If the hotend is installed, ensure the following:
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The hotend nozzle fits snugly against the hotend heater.
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The locking clip is securely fastened to prevent the hotend from loosening.
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Tips: How to properly install the hotend?
- During installation, ensure the protrusion on the hotend is embedded into the slot on the hotend heater base.
1 - Slot on the hotend heater base
2 - Protrusion on the hotend
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When correctly embedded, a strong adhesive force should be felt, and the hotend should not wobble.
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Secure the locking clip. Observe that the clip is roughly parallel to the vertical direction of the hotend.
1 - Slot on the hotend heater base
2 - Clip parallel to the vertical direction of the hotend
¶ Step 2. Check for deformation of the hotend heatsink
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After pressing the cutter to cut the filament, remove the hotend and inspect whether the heatsink has deformed downward (it should normally remain horizontal or slightly upward-curved).
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If there is no obvious deformation, reinstall the nozzle according to the instructions and click the "Homing" button on the screen to observe if homing proceeds normally.
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If a third-party hotend is used, it may also cause this issue.
¶ Step 3. 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.
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