Confirm frame, gantry, belts, and motion are mechanically sound.
Check bed tram / leveling and probe operation.
Set Z offset and validate first layer.
Calibrate extrusion using the installed firmware's recommended method.
Tune temperature and cooling for each filament.
Tune pressure advance / linear advance.
Tune input shaping if supported.
Save profiles with date, nozzle, filament, and firmware version.