rotating filament runout/clog sensor

[brampie]

Hi,

I've been working on a rotating filament sensor (with a magnet + hal effect sensor).
I've gotten to the point where it seems to be working well and reliable (3 weeks now, on a printer running marlin).
I'm using rubber X-seals to ensure good contact with the filament without adding too much resistance.

Do any of you think it's an interesting device to have ?

It detects both when the filament spool is empty and when the print head is clogged.
I do "a lot" of 3d printing and these 2 cases seem to account for +90% of my failed prints (I often print flame resistant abs and this can clog at times)

I've made a small video, https://youtu.be/DCe-7jBzin0

I posted this on the reprap forum last week but there was zero response

thx
Bram

[alankilian]

@brampie

I think it's a pretty good idea.

How does it compare to THIS?

[brampie]

@alankilian
I tried buying the duet one last year but was unable to find it at that time.
It uses some special parts if I'm not mistaken, for my design
you need 4 flanged bearings, 2 X-seal rubbers, a couple of washers, a magnet and a hal effect sensor, on my board the sensor is connected directly to the board and works as on/off switch, I think this is possible on a duet board as well.