how to configure Pulse generating BigTreeTech filament sensor?

[User3D]

I calibrated my BTT following : https://duet3d.dozuki.com/Wiki/Duet3dFilamentMonitor_LaserVersion#Section_Calibration
I got allowed movement 60 to 160 every 5mm. But I was getting different values for sensitivity,min,max % each time. Heres yesterday's reading:

L      MIN %	MAX %	Over mm
6.362	0	33	591.7
6.647	0	48	384.5
8.156	0	20	-
9.755	0	20	107.3
7.478	0	20	231.8
9.897	0	83	-
12.226	0	19	-
8.747	0	21	-
8.376	0	21	-
11.125	0	27	-

I tried 7.6 , 7, 6.25, 3.25 values for sensitivity with increased range of R(allowed movement). Still prints keep getting paused because of filament error.
My current setting:
M591 D0 L6.30 R25:195 E5 S1

So today I disabled monitoring and took readings again:

L 	MIN %	MAX %	Over mm
6.034	0	196	5496.9
5.862	63	206	129.0
5.738	0	233	286.9
5.517	0	233	353.1
5.914	0	342	816.1
5.895	0	342	866.6

How do I get it solved?

[Phaedrux]

Sorry, but what is the BTT sensor?

[User3D]

@phaedrux BigTreeTech .Sorry for inconvenience ! I'll edit rn.

[Phaedrux]

Is this the same one?

https://forum.duet3d.com/topic/17107/how-to-setup-the-bigtreetech-smart-filament-sensor

[printernoodle]

Add this to your config.g

M574 E2 S1 P"e0stop" ; configure active-high endstop for high end on E via pin estop
M591 D0 P7 C"e0stop" L7 R50:200 E15 S1 ;configure BTT smart filament sensor

adjust the "e0stop" to be whatever pin you are using.

verks just fine for me

[User3D]

@printernoodle I think its M574 that I missed. Thank you ! I'll try that.

[NeoDue]

@printernoodle you do not need the M574 command (which ought to result in some error anyway since M574 does not support the "E" parameter anymore since version 1.16 - which was quite some years ago).

The M591 command is enough.

The only problem that drove me crazy on my Duet Wifi running with firmware 3.2.2 was the pin name - for some reason M591 D0 P7 C"e0stop"... does not work, but M591 D0 P7 C"e0_stop"... does. Unsure if that is a bug in the Duet firmware or intended behaviour though.

[Phaedrux]

@neodue said in how to configure Pulse generating BigTreeTech filament sensor?:

M591 D0 P7 C"e0_stop"... does. Unsure if that is a bug in the Duet firmware or intended behaviour though.

I believe the underscore is being ignored by the firmware, so there might have been something else keeping it from working.

[NeoDue]

@phaedrux I am afraid no, at least as far as I can tell.

The underscore is the only thing I changed in my config.g during these tests (with a reboot afterwards each time), and this fault was repeatable on my machine (tried three times in total before I posted)... as soon as I removed the underscore, I did not get any calibration data with M591 D0 when I printed something. But as soon as I add it, I get calibration data for each print (same file printed in both cases time, tested with three different files so far).

I have however not tried yet if the sensor will work without the underscore being included in the name - even if he does not spit out calibration data.

Edit: files were printed from the SD card each time by the way.

[Phaedrux]

@neodue I'll take a look tomorrow and see if I can duplicate.