During the extruder switching process, the lifting motor drives the vertical movement of the left hotend and the lateral switching of the flow blocker through a gearbox. The operation of the lifting motor relies on the position hall sensor. If the position hall sensor is short-circuited, it may cause switching failure and pause the printing task. The issue must be resolved before printing can continue.
1 - Lifting motor 2 - Lifting motor position hall sensor (includes: hall effect sensor, connector) 3 - Gearbox
Possible causes include:
Malfunction of the lifting motor position hall sensor
Malfunction of the TH mainboard
Short circuit due to damaged insulation of the extruder hall sensor board
Malfunction of other hall sensors
Malfunction of the left driven rod hall effect sensor
Malfunction of the right driven rod hall effect sensor
Abnormal extruder switching motor position hall sensor
1 - Extruder switching motor position hall sensor 2 - Extruder hall sensor board 3 - Left driven rod hall effect sensor 4 - Right driven rod hall effect sensor 5 - Extruder hall sensor board connector
Before disassembling the toolhead, ensure the printer is powered off.
If replacing the TH board, extruder hall sensor board, extruder switching hall sensor, or lifting motor hall sensor, perform toolhead switch calibration after toolhead assembly.
H2.0 Allen key
H1.5 Allen key
Tweezers
Users may adjust the order of these solutions as needed.
Refer to Steps 1~4 in the Wiki Disassemble the H2D toolhead to expose the TH connection board.
The peripheral power supply powers all hall sensors. The peripheral power indicator (referred to as the indicator) is located at the lower part of the TH board and indicates the status of the peripheral power. Normally, the indicator remains lit.
Power on the printer
Check the status of the indicator
If the indicator is lit, the peripheral power supply is normal, but the position hall sensor of the extruder lifting motor is malfunctioning and needs replacement. Proceed to Step 3.
If the indicator is off, the peripheral power supply is abnormal. Any hall sensor or the TH board in the peripheral power supply chain may malfunction. Proceed to Step 4.
Power off the printer.
Disconnect the position hall sensor wires of the lifting motor.
In the exposed state of the TH connection board, use tweezers to disconnect the position hall sensor wires of the lifting motor.
7 - Lifting motor position hall sensor connector 3 - Extruder hall sensor board connector
Power on the printer
Check the status of the indicator
If the indicator turns on, the hall sensor is abnormal. Refer to the Wiki Disassemble the H2D toolhead for replacing the lifting motor position hall sensor.
If the indicator remains off, proceed to Step 4.
If the indicator turns on, the extruder hall sensor board or its associated hall sensors are short-circuited. Proceed to Step 5 for further troubleshooting.
If the indicator remains off, refer to Steps 1~8 in the Wiki Disassemble the H2D toolhead to replace the TH board.
Disassemble the extruder front cover
Refer to the Wiki How to Disassemble and Assemble H2D Extruder
Sequentially check for short circuits in the extruder switching motor position hall sensor, left filament hall and the right filament hall.
During the check, disconnect the specified hall sensor connector (printer powered off)
Observe if the indicator lights up (printer powered on)
If it lights up, the hall effect sensor is abnormal and needs replacement.
If it remains off, proceed to Step 5.
Refer to the Wiki Disassemble the H2D toolhead to disassemble the extruder assembly, remove the screws, and replace the extruder hall sensor board and connector.
If the above solutions do not resolve the issue, submit a ticket and upload the printer’s log files.
The following HMS codes represent the same type of issue.
HMS Code | Description |
---|---|
07FE-8000-0001-0004 | The Toolhead Lifting Motor position hall sensor is short-circuited; please check if the hall sensor is malfunctioning. |
07FF-8000-0001-0004 | The Toolhead Lifting Motor position hall sensor is short-circuited; please check if the hall sensor is malfunctioning. |
18FE-8000-0001-0004 | The Toolhead Lifting Motor position hall sensor is short-circuited; please check if the hall sensor is malfunctioning. |
18FF-8000-0001-0004 | The Toolhead Lifting Motor position hall sensor is short-circuited; please check if the hall sensor is malfunctioning. |
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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