Case library

Failure cases should read like evidence, not stories.

These starter examples show the structure Print Fixes uses before publishing anonymized real submissions: symptom, setup, test, one variable, result, and next branch.

Submit a tested case Photo checklist

Example case format

Poor first layer after nozzle change

Setup: Bambu A1, PLA, textured PEI, 0.4 mm nozzle
Test: Five-patch first-layer test
One change: Lowered Z/contact calibration by one small step after confirming nozzle seating.
Result: Center and corners changed from separated lines to connected patches.

Do not start with flow when the first-layer line shape still shows wrong nozzle distance.

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Example case format

Glossy PETG strings between towers

Setup: Direct drive printer, PETG, OrcaSlicer
Test: Stringing two-tower test
One change: Nozzle temperature lowered 5 C; retraction unchanged.
Result: Fine hairs reduced and walls stayed bonded.

Temperature/dryness should be proven before copying aggressive retraction values.

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Example case format

Large flat corner lifts after layer 5

Setup: ASA, enclosed printer, PEI plate
Test: Warping corner coupon
One change: Reduced early fan and preheated enclosure; plate cleaning unchanged.
Result: Coupon stayed flat; first-layer patch was already acceptable.

Late lift after a good first layer is usually cooling stress, not more Z offset.

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Example case format

Klipper timer too close during dense infill

Setup: Voron / Klipper CoreXY, USB MCU
Test: Saved klippy.log, repeated the same motion section at lower acceleration.
One change: Reduced acceleration for one safe repeat test.
Result: The error disappeared in the repeat; next check is host load and motion demand.

Exact log text plus one repeat test beats random printer.cfg edits.

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Future real cases

Submitted cases stay anonymous and get reviewed before publication.

Photos or logs are useful only when they include the test, the one changed variable, and the before/after result.

Submit evidence