It is on the latest 7.0.2 firmware. What do you mean by "the sensor only detects the (in)correct flow" ? What is the incorrect flow? What is the correct flow? What does the sensor actually detect? What is the purpose of the sensor if it cannot determine if there is no filament flowing?
The flow error is displayed if the measured flow is smaller than 80 percent of the flow defined by the print file.
If the end of the filament is still 10cm away from the nozzle, somewhere inside the Bowden tube, it might flow with almost 100 percent but still you would have no extrusion. The sensor measures the flow through the feeder, not through the nozzle.
@Dim3nsioneer Thanks for the info. Is there any documentation on this? I did finally have the sensor alert me when I was printing too fast with a 3rd-party filament. So I now can confirm that it does work. And that the printer can recover.👍
There is no public documentatioin about the threshold level; just code. For general information about the flow sensors, see https://support.ultimaker.com/hc/en-us/articles/4409038027538-The-flow-sensor-has-triggered
Make sure you have the newest firmware version of your update channel installed. IIrc there was a recent update concerning the flow sensor during loading.
As for no filament coming out of the nozzle: the sensor only detects the (in)correct flow but can of course not detect if the filament is at the wrong position (e.g. due to an early confirmation at loading).
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