A detailed STLBEAST repair guide to set a predictable separation gap based on layer height and material. Learn how to recognize the symptom, rank the likely causes, apply safe fixes in order, verify the result, and prevent the failure from returning.
Start hereStart with express the gap in layer increments, then test one small underside. Confirm the result with a short representative test before changing additional settings.
First safe actionRun the first safe check and change one variable at a time.
Proof targetA small representative test no longer shows the original symptom.
Match the failed area to the visual before changing a setting.
Repair progress0 of 8 complete
Step 1 of 8
Document the failure and confirm that it matches this guide: Supports either weld to the part or leave a sagging rough underside.
Keep the problem and target visual open while you make this change.
Why this matters
The support fuses to the model.
Setting or checkSupport threshold
Support only geometry that cannot bridge or overhang cleanly.
Expected result
The supported surface is stable and the support breaks away cleanly.
Step 2 of 8
Return extreme overrides to a known printer, nozzle, material, and slicer profile so the diagnosis starts from a stable baseline.
Keep the problem and target visual open while you make this change.
Why this matters
The first supported layer droops.
Setting or checkInterface density
Use enough continuous contact to hold the underside.
Expected result
The same test succeeds at least twice without a new artifact appearing.
Step 3 of 8
Check gap too small. Express the gap in layer increments.
Keep the problem and target visual open while you make this change.
Why this matters
The slicer rounds unpredictably.
Setting or checkContact Z distance
Set in layer-height increments and test removal.
Expected result
No safety warning, unusual noise, heater error, binding, or material damage is introduced by the change.
Step 4 of 8
Check gap too large. Test one small underside.
Keep the problem and target visual open while you make this change.
Why this matters
Heat bridges the intended gap.
Setting or checkOrientation
Often provides a larger quality gain than adding more support.
Expected result
The successful values are recorded with printer, nozzle, material, slicer, and date.
Step 5 of 8
Inspect gap not aligned to layer height. Tune cooling.
Keep the problem and target visual open while you make this change.
Why this matters
The support fuses to the model.
Setting or checkSupport threshold
Support only geometry that cannot bridge or overhang cleanly.
Expected result
The supported surface is stable and the support breaks away cleanly.
Step 6 of 8
Rule out material remains too soft. Use interface layers.
Keep the problem and target visual open while you make this change.
Why this matters
The first supported layer droops.
Setting or checkInterface density
Use enough continuous contact to hold the underside.
Expected result
The same test succeeds at least twice without a new artifact appearing.
Step 7 of 8
Change only the single setting or hardware condition supported by the evidence, then run a small test that reproduces the original failure.
Keep the problem and target visual open while you make this change.
Why this matters
The slicer rounds unpredictably.
Setting or checkContact Z distance
Set in layer-height increments and test removal.
Expected result
No safety warning, unusual noise, heater error, binding, or material damage is introduced by the change.
Step 8 of 8
Compare the test against the target condition, record the successful value, and save it in a printer/material profile before repeating the full print.
Keep the problem and target visual open while you make this change.
Why this matters
Heat bridges the intended gap.
Setting or checkOrientation
Often provides a larger quality gain than adding more support.
Expected result
The successful values are recorded with printer, nozzle, material, slicer, and date.
Controlled test log
Change one variable, then record what happened
This keeps temperature, retraction, speed, mechanical, and material tests from blending together. The history stays private in this browser.
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