¶ Issue Description
High-precision offset calibration: Select two filaments, print a calibration model on the build plate, then use the toolhead camera to capture images and identify the offset between the actual and theoretical lengths of the lines in the X/Y directions to complete the offset calibration. If the calibration model has poor print quality or the camera is malfunctioning, the calibration may fail.
Possible causes of high-precision nozzle offset calibration failure:
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Poor print quality of the calibration model, e.g., the top calibration lines are missing or not straight. (High probability)
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The colors of the two filaments used for calibration are too similar, resulting in insufficient contrast. (High probability)
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The top chamber LED of the printer are not turned on, as some image captures rely on these lights. Manually turning off the LED may also cause recognition failure.
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The toolhead camera is installed at an angle.
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The toolhead camera is faulty or the lens is dirty.
¶ Troubleshooting
¶ Tools, Equipment and Materials
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Scraper
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Two filaments with high color contrast
¶ Solutions
Users may adjust the order of these solutions as needed.
¶ Step 1. Inspect the printed offset calibration pattern
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Check the quality of the printed calibration model. A good calibration model should have:
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Clear color contrast.
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Uniform thickness and straightness of the top calibration lines.
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If the color contrast is insufficient, remove the existing calibration print and re-calibrate using filaments with more distinct colors.
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If the print quality is poor:
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Remove the existing calibration print.
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If the build plate is dirty or uneven, clean and re-level it.
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If the nozzle is clogged or leaking, causing uneven calibration lines, clean or replace the nozzle.
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¶ Step 2. Check the Toolhead Camera status
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Do not manually turn off the top chamber LED during calibration.
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If the toolhead camera lens is dirty, clean it with a cotton swab dipped in alcohol.
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If the toolhead camera is visibly tilted, refer to the Wiki Replace H2D Toolhead Camera to reinstall the camera.
¶ Step 3. Replace the Toolhead Camera
If the above steps do not resolve the issue, submit a ticket and upload the log files.
You may also refer to the Wiki Replace H2D Toolhead Camera to replace the toolhead camera yourself.
¶ 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!