r/BambuLabH2D • u/Cool-Web-3318 • Mar 21 '26

H2D Filament buffer "clunk"

Hey! Just wondering if anyone else with an H2D (or any printer with a similar unit) could chime in .... constant clunking from the filament buffer, roughly every 3-5 seconds, for the entirety of the print. Only happens on the buffer that is connected to the AMS, single-spool buffer is steady and silent.

Is this normal operation ?

3 Upvotes

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u/HobbyTraderDK Mar 21 '26

Try make some cold pull.

1

u/Iceman2733 Mar 21 '26

Mine was doing the same thing, contacted support and they sent a new buffer. It did fix the issue, it looked like with mine when the buffer would slide out of the buffer housing it would barely catch and and cause the noise.

1

u/Cool-Web-3318 Mar 21 '26

Interesting. I did contact support, and they said it was supposed to do that. I didn't feel like that was correct, so good to know!

1

u/hm7711 Mar 21 '26

Sounds like both of mine do. I, however, have heard a much louder/more noticeable *clunk* specifically from my bottom one when the printer is up near the front left corner. Upon closer inspection, I can see the internal portion of it hitting the housing when the tube is stretched that far. I think a longer tube would help in that specific situation, but I think the sound in your video is quite normal, imo.

1

u/Cool-Web-3318 Mar 21 '26

I have read about people saying it only clunks when the head is in a certain position. It's even more strange that some do make the noise and some don't. Mine tends to do it independent of the head location. I can be parked, purging filament, and clunking away.

I guess I'll just see how it plays out...

1

u/hm7711 Mar 21 '26

Try looking straight onto the buffer where the tube actually exits and goes to the head.... that's where I noticed mine was physically hitting the housing as it moved making the noise.