A Surface Line That Did Not Affect Function

Systematic Print Failure Analysis & Evidence Classification

Addressing repeated print problems requires rigorous classification of physical symptoms prior to random calibration changes. Understanding whether a defect is tied to thermal gradient shifts, kinematic backlash, or geometry orientation prevents compounding variable errors.

Physical Symptom Investigation

The specimen exhibited a distinct horizontal ridge across the outer perimeter at a specific layer transition, yet load tests confirmed nominal tensile strength. When internal infill geometry remains intact and dimensional accuracy stays within ±0.05 mm, the anomaly stems from surface velocity shifts rather than mechanical under-extrusion.

• Layer adhesion retains 100% design shear resistance under transverse mechanical load testing.
• Micrometer caliper checks show no volumetric narrowing or wall collapse across the perimeter plane.
• Slicer preview matches the exact height where layer printing duration changed due to inner solid top layers.