¶ Issue Description
When the left hotend is in the printing state, the flow blocker should be positioned directly below the right hotend, tightly against the nozzle to ensure sealing. Conversely, when the right hotend is printing, the flow blocker should be located below the left hotend, performing the same function. However, if the flow blocker is displaced due to external force (such as forcibly bending it to the left or right), since the left hotend and the flow blocker are mechanically linked, this displacement can cause the left hotend to passively rise or fall, leading to printing anomalies.
Possible causes of the issue include:
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Severe warping or deformation of the flow blocker causing interference with the heatbed or printed parts.
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Accumulation of waste filaments in the trash bin, causing interference between the toolhead and the flow blocker during cleaning.
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Warping of printed parts, resulting in scraping or collision with the flow blocker.
¶ Troubleshooting
¶ Tools, Equipment and Materials
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H2.0 Allen key
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Flow blocker
¶ Solutions
Users may adjust the order of these solutions as needed.
¶ Step 1. Check for Flow Blocker Deformation
If the flow blocker is deformed, refer to the Wiki Replace H2D flow blocker for instructions on replacing the flow blocker.
¶ Step 2. Clean the filament accumulation in the purge wiper
¶ Step 3. Adjust slicing parameters to avoid warping and interference with the flow blocker
Warping, detachment, or collapse of models are generally caused by localized shrinkage of the model or insufficient adhesion to the build plate. The reduced distance between the warped area of the model and the nozzle may lead to scraping or collision with the flow blocker. The manifestation is shown in the image below:
Refer to Model Warping, Falling Off, or Collapsing to adjust printing parameters to improve warping and avoid interference with the flow blocker:
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-8000-0002-0002 | The position of left hotend is abnormal during printing. Please check whether the flow blocker scratches the printed model. |
| 07FF-8000-0002-0002 | The position of left hotend is abnormal during printing. Please check whether the flow blocker scratches the printed model. |
| 18FE-8000-0002-0002 | The position of left hotend is abnormal during printing. Please check whether the flow blocker scratches the printed model. |
| 18FF-8000-0002-0002 | The position of left hotend is abnormal during printing. Please check whether the flow blocker scratches the printed model. |
¶ 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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