¶ Issue Description
The extruder switching mechanism includes: extruder switching motor, gears, cams, left and right switch idlers. During the extruder switching process, the switching motor is responsible for driving the switch idlers to swing left and right. During the process, if the swing resistance is too large, the switching will fail.
Possible causes：
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Filament is stuck inside the extruder.
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There is failed component or foreign objects stuck in the switching mechanism.
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This picture shows how the extruder switches the direction. Please do not attempt this operation manually.
¶ Troubleshooting
¶ Tools and materials required
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H2.0 Allen key
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H1.5 Allen key
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Tweezers
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Diagonal cutting pliers/scissors
¶ Solutions
You can adjust the order of these solutions as needed.
¶ Step 1. Try to manually switch the extruder.
- As shown in the picture below, manually switch the tail of the extruder switching motor to see if the switching cam rotates about 90°.
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Tap on the screen to select the left or right nozzle to see if the extruder switches normally.
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If the extruder switches normally, then the troubleshooting finishes. If not, please go to step 2.
¶ Step 2. Remove the hotends and quick change tool interface to expose the switching mechanism
Refer to steps 1-5 in How to Disassemble and Assemble H2D Extruder to expose the extruder switching mechanism.
¶ Step 3. Remove the filament inside the extruder
Use diagonal cutting pliers or scissors to remove the filament inside the extruder.
¶ Step 4. Check the gear, cam and extruder idlers
The extruder switch drive gear and the switch cam are meshed through the gear. The switch cam is in contact with the rollers of the left and right driven extruder idlers. If there is foreign matter between the parts, please use tweezers or a brush to clean it. If the surface of the part is damaged, please replace it.
Refer to: Replace H2D Extruder Hall Sensor Board/2004 Switching Motor Unit.
1-Extruder switching drive gear 2-Left extruder idler 3-Extruder switching cam 4-Right extruder idler
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¶ Step 5. Extruder switching motor installation
Refer to: Replace H2D Extruder Hall Sensor Board/2004 Switching Motor Unit to install the switching motor unit.
After installation, perform toolhead motor position calibration.
¶ Step 6. Click the screen to try switching the extruder again
Perform step 1 and try switching the extruder. If the switch is successful and no alarm is generated, the troubleshooting is successful.
If the above solutions do not resolve the issue, submit a ticket and upload the printer’s log files.
¶ Equivalent Codes
The following HMS codes represent the same type of issue.
| HMS Code | Description |
|---|---|
| 07FE-8100-0002-0001 | The extruder switching action is abnormal. Please check whether there is something stuck in the toolhead. |
| 07FF-8100-0002-0001 | The extruder switching action is abnormal. Please check whether there is something stuck in the toolhead. |
| 18FE-8100-0002-0001 | The extruder switching action is abnormal. Please check whether there is something stuck in the toolhead. |
| 18FF-8100-0002-0001 | The extruder switching action is abnormal. Please check whether there is something stuck in the toolhead. |
¶ 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, we will answer your questions and provide assistance.
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