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Apply the saved reference-stud or 4.80 mm receiving-fit profile you want to keep, if you have one.
In Calibration, choose the finish goal in Find my fit or select Improve corners and seams from All tests. Choose a supported source and review the retained connection geometry before preparing candidates.
Choose Seam restart, Corner motion or Extrusion flow, then use Starting comparison, Fine refinement or Wider comparison under Comparison range. Start with a small comparison.
Review the five numbered values. The labeled baseline is retained, including near a range limit.
Prepare the candidates and print each as a separate job with its own recipe. The selected sample shows layer height, flow, outer-wall speed, acceleration, seam gap and temperature.
Stud diameter, receiving relief, source body and stud spacing stay the same across every candidate. An applied reference-stud or 4.80 mm profile provides the starting fit and process; without one, this trial starts from the existing 4.80 mm / −0.020 mm recipe. The corner test does not infer an earlier calibration from a photograph.
The common controls enable rear seam wiping and smooth-surface settings, and disable brim and supports. Elephant-foot compensation retains the selected recipe value, including the recorded reference default when that process is chosen. Within a comparison only the selected process variable changes. Native transfer keeps the installed printer’s pressure-advance configuration. A process change can still alter the physical grip, so repeat connection checks.
Starting recipe offers the user-confirmed p3003-febe17af-553f183c_PLA_2h25m13s.gcode for Creality K2 Pro, PLA and a 0.4 mm nozzle. It replaces the earlier 1h 59m reference. Normal mode retains installed standard motion. Select Nexlock / custom speeds to choose recorded motion or a faster-interior trial.
This corner comparison retains an applied reference-stud fit; otherwise it uses 4.80 mm derivative geometry. To restore the corrected file without changing walls, use Restore the K2 Pro stud trial under All tests → Previous setups. Its inferred +0.030 mm baseline and single-stud verification are described in the dedicated guide.
Elephant-foot compensation retains the selected reference value; native machine pressure advance is preserved. A recorded process is not a Tested result.
| Comparison | Inspect |
|---|---|
| Seam restart | Start here for a raised line or blob at one repeated corner. Compare seam gaps with the same rear seam and loop wiping. Reject gaps or weak wall joins. |
| Corner motion | Use this when several corners bulge or echo. Compare acceleration with the same flow, speed and geometry. Machine firmware may cap the requested motion. |
| Extrusion flow | Use this for swollen walls or raised top-surface ridges. Compare a small range around the selected spool flow. Reject thin walls, top gaps or weaker grip. |
After cooling, inspect all four corners, the top rim and the underside. Reject a curled base, raised ridge or open wall seam. Compare both mating directions against the same reference, then assemble a three-brick wall and repeat the winner three times before saving Tested.
If every corner stays swollen across the comparison, use the installed slicer or firmware’s pressure-advance calibration for that nozzle and spool, then repeat. Pressure advance is not a universal number. The referenced guidance explains the methods; the trial bands are Nexlock exploration ranges. An original STL is needed to compare exact geometry from an unknown earlier test; a saved slicer project can also preserve its process.