Every brand, and often every colour within a brand, melts differently. This is per-spool, not per-printer — and it is the highest-value single test a beginner can run.
Phase 2 — Thermalabout 60 minper filament
How to do it
Generate a tower across the material's range.
Print it and let it cool fully.
Try to snap each band. Note where the part stops breaking cleanly between layers.
Judge overhang quality and stringing at each band as a secondary criterion.
Choose the coolest temperature that still gives strong layer bonding.
How to read the result
Pick for LAYER ADHESION first, surface finish second. The prettiest band is often the weakest: cooler prints look cleaner and snap apart. Try to break each band by hand.
Your slicer may do this for you
OrcaSlicer and SuperSlicer both generate a temperature tower from their Calibration menu, and Bambu Studio has one as well.
Redoing this invalidates
Calibration is a chain. Change this and the results below were measured against the old value: