How does the Laser Filament Data Processing work?

[Hornetrider]

Hi

I have been using the laser filament sensor for a while now, and must say, I am quite happy. Even without changing values due to filament properties...
Especially as it reacts as a "run out" and different extrusion situations.

But...
As I understand the sensor sends the data and the DUET does the math, right?
I would really like to learn how the DUET2 evaluates and calculates the signals from the sensor.

So, what is the math behind it?
Is there a time constant for vallues, so the reaction is a bit delayed?
Is there any way to compensate for high fluctuating valuees during print?

From my perpective the most crucial function ist to detect a fliament run out.
Under or over extrusion are secondary.

Is there a way to have the filament run-out solved by FW regardless of the values, or do we really need to integrate a switch?

Looking forward for your inputs.

Cheers

[A Former User]

its all open source ..

https://github.com/T3P3/FilamentMonitors/tree/master/Filament_Monitor_Laser_v1.7
and
https://github.com/dc42/RepRapFirmware

i believe