A strong 3D print requires seamless bonding between perimeters (walls) and infill. If there are visible gaps between them, the part becomes weaker and can fail under load. This issue is almost always slicer-related and is solved by tuning overlap settings and extrusion calibration.
Symptoms:
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Visible separation between perimeters and infill.
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Weak bonding between walls and interior.
Causes:
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Infill/perimeter overlap too low.
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Under-extrusion.
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Slicer miscalibration.
Troubleshooting Steps:
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Increase infill/perimeter overlap in slicer (10–15%).
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Verify extrusion multiplier calibration.
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Slow infill speed for better bonding.
Prevention Tips:
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Run calibration prints to tune overlap.
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Use consistent extrusion settings across walls and infill.
