BTT Smart filament sensor

knutselsmurf · 7 Aug 2021, 17:49

Hi!
I have a BTT Smart filament sensor and I am trying to understand how it works.
Seems to be working but still have questions:

when I do a sensor calibration, I get these results:

7-8-2021 19:46:18 M591 D0 ; display filament sensor parameters for extruder drive 0
Pulse-type filament monitor on pin e0stop, disabled, sensitivity 0.500mm/pulse, allowed movement 90% to 110%, check every 3.0mm, measured sensitivity 9.165mm/pulse, measured minimum 0%, maximum 17% over 2089.7mm
7-8-2021 19:40:52 M591 D0 ; display filament sensor parameters for extruder drive 0
Pulse-type filament monitor on pin e0stop, disabled, sensitivity 0.500mm/pulse, allowed movement 90% to 110%, check every 3.0mm, measured sensitivity 9.279mm/pulse, measured minimum 0%, maximum 17% over 1911.4mm
7-8-2021 18:30:53 M98 P"0:/macros/Filament/Filament sensor tuning"
Pulse-type filament monitor on pin e0stop, disabled, sensitivity 0.500mm/pulse, allowed movement 90% to 110%, check every 3.0mm, measured sensitivity 12.023mm/pulse, measured minimum 0%, maximum 16% over 96.2mm
7-8-2021 18:30:40 M98 P"0:/macros/Filament/Filament sensor tuning"
Pulse-type filament monitor on pin e0stop, disabled, sensitivity 0.500mm/pulse, allowed movement 90% to 110%, check every 3.0mm, measured sensitivity 13.307mm/pulse, measured minimum 0%, maximum 16% over 93.1mm

So, what is now the best setting for M591 ?
Now, I have this:

M591 D0 P7 C"e0stop" L0.5 R90:110 E3 S0

something else, when I enable the sensor, and start a print and remove the filament after some printing time, the printer is not paused?
this was tested when I had this (not calibrated yet: ;M591 D0 P7 C"e0stop" L7 R50:200 E15 S1 ;configure BTT smart filament sensor

Any help would be nice

Phaedrux · 7 Aug 2021, 18:25

@knutselsmurf said in BTT Smart filament sensor:

something else, when I enable the sensor, and start a print and remove the filament after some printing time, the printer is not paused?
this was tested when I had this (not calibrated yet: ;M591 D0 P7 C"e0stop" L7 R50:200 E15 S1 ;configure BTT smart filament sensor

E15 means that it would take 15mm of filament going through before it takes a single reading which could take some time. Hence the need for calibration.

The calibration will be the same as the Duet magnet sensor AFAIK

https://duet3d.dozuki.com/Wiki/Duet3dFilamentMonitor_RotatingMagnetVersion#Section_Calibration