BTT filament sensor misconfigured? for Ender 3 V2 4.2.2

Marlin Firmware Service Support
,
1

I’m trying to use the Bigtree Filament Sensor with my Ender 3 V2 on a 4.2.2 board. I’ve tried the firmware from Ender 3 V2 - BLTouch - Marlin Firmware Service for 20210913 and 20210908. I have the BTT sensor hooked to the Ender’s motherboard.

I’ve enabled filament runout with M412 S1. In both firmwares a print will print one layer and then eject the filament and wait for more to be inserted. If I do that, it will print another layer and then eject and wait for more to be loaded.

If I turn the Ender on and insert filament, running command M119 from Octoprint:
Send: M119
Recv: Reporting endstop status
Recv: x_min: open
Recv: y_min: open
Recv: z_min: TRIGGERED
Recv: z_probe: TRIGGERED
Recv: filament: open
Recv: ok P15 B3

Then if I move (push or pull) the filament through the BTT sensor and do another M119:
Send: M119
Recv: Reporting endstop status
Recv: x_min: open
Recv: y_min: open
Recv: z_min: TRIGGERED
Recv: z_probe: TRIGGERED
Recv: filament: TRIGGERED
Recv: ok P15 B3

Is that correct detection?

Thank you,

dark8088

2

Sounds about right - try setting a longer runout distance and see if this helps.

Try: M412 S1 D15

That will set the max no-pulse distance to 15mm. I believe the default is 7mm - which is sometimes on the very edge of detection. You can experiment with this number to see what works best for your filament and sensor.

3

I’ll try making it longer than 15. Still no joy.