Initial situation:
Started printing with TPU via the printer display. Selected the automatic flow calibration.
I noticed in the console that it was unsuccessful:
// start flow calibration for extruder3
// start heating heater to 240 degre
// start measuring frequency
// start extruding
// measure k: 0.15000
// measure area: -3201.00000
// measure k: 0.36000
// measure area: -2472.00000
// abort calibration: out_of_range
// flow k is out of range, use default value:0.25
Manually changing it via Fluidd, e.g., to 0.15, results in the following error message:
$ SET_PRESSURE_ADVANCE ADVANCE=0.15
// flow calibration enabled, so not take effect.
Now the question: how can you change the PA values during an ongoing print even though the automatic flow calibration was enabled at the start?