H2D Filament lodged INSIDE the Hall effect sensor chamber

[Megamanex]

Hey all,
After disassembly of the extruder on the H2D multiple times and not finding a stuck bit of Filament I’ve managed to find an edge case where a sliver of filament can get stuck in the Hall effect sensor chamber of the H2D Filament Sensor.

Since documentation didn’t have any info on this, I’ve attached photos of where it occurs in case anyone runs into this down the line.

I’ve also logged it with support.

This image with the dark grey bit of filament shows the culprit.

It looks like the filament somehow peeled away into the chamber.

[Megamanex]

Note that you can slide filament inside of the sensor and completely miss it. The way I figured it out is that looking THROUGH the PTFE channels you should see the spring arm obstructing the channel somewhat. If the channel is completely open you have something lodged beneath the Hall effect circuit boards on the sides of the Filament Sensor.

[user_3587210220]

Hi,

I might be experiencing the same issue.

My H2D printer can’t get the filament into the right extruder.

I’ll show you a video — could it be the same behavior you encountered?

This is the video link: https://youtube.com/shorts/cU_khA11Jd8?feature=share

Thank you

[Megamanex]

Hey there.

I think yours is slightly different but you should be able to open it up and clean out any debris causing the issue.

[moody.daniel79]

What turned out to be your issue!! Im having the exact same

[jonmerin]

Hi, thank you so much for your post. I had exactly the same issue. A very thin thread of filament inside the hall effect sensor chamber. It seems it’s not so uncommon.

[Gerrit]

Does anyone who had this, have an idea what might have caused this?

It’s good to know how to resolve this, but better to know the root cause and possibly prevent this from happening.

[WorldExpy]

@Megamanex, Thank you for this post! I was encountering “phantom” filament detection on my left extruder. Removed the filament sensor board as you’ve indicated and found some very fine (dust like) slivers of filament in that chamber. Cleaned it up and am hoping for the best. Just finished reassembling and testing the filament swaps. Hoping for the best. So since I had the left side apart, I’d figure I’d clean the right side (no problems encountered on the right so far.) to my shock, the right side chamber was near clogged. 10-20x more dust/shavings in the right side. So surprised I had no issues on the right compared to what I encountered on the left.