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Type of Defect: |
Black Streak |
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Description: |
Black Streak |
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Observation Method: |
Visible by the human eye |
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Recommendation Upon Observation: |
Better visibility using a Magnifier |
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Other Evaluation Method: |
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Cause |
Countermeasure |
Burned PC caused by thermal degradation (especially at nozzle)
nozzle temperature is too high |
Adjust nozzle temperature (too high) |
Burned PC caused by thermal degradation (especially at nozzle)
wide thermal cycling of nozzle temperature. |
Check the nozzle temperature controller |
| Burned PC resin layers crumbling and/or peeling off from cylinder or nozzle wall |
see Black Speck (3/3) |
