Smart Filament Sensor triggers no matter what

[sheshman]

Hi,

I bought 2pcs BTT Smart Filament Sensor from local supplier, https://www.rhino3dprinter.com/urun/bigtreetech-btt-sfs-akilli-filament-sensoru?gclid=CjwKCAiAz4b_BRBbEiwA5XlVVpAN9sJXtMODLsTQl2or2GJbGs992tLtw9xvw4d1fJ-7QTNHo4LQ8hoC4n0QAvD_BwE

My printers are ;
Ender 3 PRO – Creality 4.2.7 Silent Board – Marlin 2.0x Bugfix
Ender 3 V2 – Creality 4.2.2 Silent Board – Marlin 2.0x Bugfix

Filament runout is enabled on both printers, when i start to print, printer starts printing and it stops while printing first layer and return filament runout error, i thought maybe sensor is faulty, contacted with local supplier and they replaced with new one but the result was the same.

So i started to search to fix it, reached to marlin developers and they said maybe i should configure distance of the sensor with M412 command, so through octoprint i send; M412 and printer returned;

Recv: echo:Filament runout On
Recv: Filament runout distance (mm): 9.00
Recv: ok P15 B3

So i started to increase the distance with; M412 D15 command, i’ve tested with even 20mm but result always is the same sensor sends trigger to printer like filament jammed or runout and stops printing.

What am i doing wrong and how i can fix it?

[sheshman]

anyone?

[Author]

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