I know have two Bambu P1S (one upgraded from P1P to P1S and one combo) and wonder if I should start the 26 min calibration one by one or together?
Both printers are on the same desk, I use the anti vibration rubber feet on both printers.
IF the desk won’t move and won’t transfer the vibrations it is fine.
But even then it would be best to calibrate one by one.
You don’t do this often so the time wasted is not a big loss.
If doing it together you risk that vibrations from one machine affect the calibration of the other.
Then you would have to do it all again individually anyway, so why waste more time ? 