¶ Issue Description
The function corresponding to this fault is "motion accuracy calibration", which calibrates the motion error of the toolhead mechanical motion system, including distortion and hysteresis, through the absolute positioning of the visual encoder, so as to compensate and correct such motion errors in the actual printing process. During the calibration process, it is crucial for the toolhead camera to recognize the pattern on the visual encoder. If the pattern on the visual encoder cannot be accurately recognized, this error may occur.
Common Scenarios Causing the Error:
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Incorrect placement of the visual encoder
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Severe deformation or contamination of the encoder board
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Dirty/obstructed Toolhead Camera lens
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Excessive ambient light causing image overexposure
¶ Troubleshooting
¶ Tools, Equipment and Materials
- Cleaning paper/alcohol
¶ Fault Isolation Process
- First check whether the visual encoder is correctly placed on the heatbed (as shown in the figure below) and confirm that the board is correctly positioned and not tilted. Then check whether the pattern of each small square on the visual encoder is clearly visible. If part of the pattern is dirty, you can use alcohol to clean the surface of the visual encoder pattern layer. If the encoder is obviously severely damaged or distorted, please replace it with a new one in time.
- Check if the toolhead camera lens is stained or blocked. If found, wipe it gently with cleaning paper and clean the foreign matter in front of the lens.
- During the calibration process, the top chamber LED will automatically turn off. If you manually turn on the top chamber LED during this process, or install an additional fill light in the printer chamber, the brightness may be too high and the toolhead camera may overexpose the photo, resulting in calibration failure.
¶ Equivalent Codes
The following HMS codes represent the same type of issue.
| HMS Code | Description |
|---|---|
| 0300-2900-0001-0001 | Encoder pattern can not be recognized; possible reasons include: pattern distortion, light overexposure, plate misplacement... |
¶ End Notes
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