The useful experiment is a tiny single-object print repeated with one variable changed at a time: nozzle side, then flow profile, then speed. Bambu Studio calibration tools and official documentation are the appropriate reference, rather than changing prime volume and speed together.
Why it matters: This is a concrete choice or experiment for today or this week.
Practical next move: Print the same small calibration part on the right extruder with a known-good PLA Basic profile; record first-layer appearance and actual duration.
Go to Source — https://wiki.bambulab.com/en/software/bambu-studio/calibration_flow_rate
A quick test plan can isolate whether the 0.6 mm nozzle, extruder side or slicer profile caused your spaghetti prints. Action: Print the same small calibration part on the right extruder with a known-good PLA Basic profile; record first-layer appearance and actual duration.