A detailed STLBEAST repair guide to compensate for extrusion, geometry, and material shrink without guessing. 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 measure a calibration part, then use hole compensation. 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: Circular holes print undersized or require drilling despite correct outer dimensions.
Keep the problem and target visual open while you make this change.
Why this matters
Perimeter centerlines create a smaller internal diameter.
Setting or checkSupport threshold
Support only geometry that cannot bridge or overhang cleanly.
Expected result
Holes meet functional tolerance and remain round.
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
Cooling reduces the opening.
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 extrusion width intrudes inward. Measure a calibration part.
Keep the problem and target visual open while you make this change.
Why this matters
The circle is approximated by too few segments.
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 material shrink. Use hole compensation.
Keep the problem and target visual open while you make this change.
Why this matters
The top of the hole droops inward.
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 low polygon resolution. Increase model segment resolution.
Keep the problem and target visual open while you make this change.
Why this matters
Perimeter centerlines create a smaller internal diameter.
Setting or checkSupport threshold
Support only geometry that cannot bridge or overhang cleanly.
Expected result
Holes meet functional tolerance and remain round.
Step 6 of 8
Rule out horizontal-hole sag. Reorient or support horizontal holes.
Keep the problem and target visual open while you make this change.
Why this matters
Cooling reduces the opening.
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 circle is approximated by too few segments.
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
The top of the hole droops inward.
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.
Supports & Geometry3D Printed Threads That Fit Reliably
Supports & GeometryTree Supports vs Normal Supports
Supports & GeometrySupport Interface Settings
