H2D believes that there is still filament somewhere

Bambu Lab H2D
1

Hello,

I have a problem with my H2D.

I get the following error message:

HMS_07FF-2000-0002-0004 / Error 07FF C003

… but there is no filament in the tubes

I can load external filament and it loads it, unloading works mechanically without problems but I always get the above error message. In other words, the H2D believes that there is still filament somewhere - but this is not the case, neither in any PTFE tube nor anywhere in the extruder or the nozzle. I have opened the extruder several times now, emptied the nozzle, the tubes are clear and still this error message appears, even though there is no filament anywhere. So at the moment I can load a spool externally, but unfortunately I can no longer load filaments from the AMS, because in this context, “the old non-existent” filament cannot be removed beforehand. it looks to me as if a sensor is not working as it should… anyone else have any ideas or had the same experience?

best regards

2

Have you tried turning it off and on? One time it thought it still had tpu from the side spool loaded. There was none. Restarted the printer and it went away.

This may be why you can load a side spool still.

3

yes, i’ve tried that several times, gone through several scenarios… reloaded externally… and unloaded again, where then the error message comes up again… even in the bambuslicer the external spool is displayed next to the ams where loaded filament should be in it, although this is not the case.

4

Sorry to hear that. Hopefully you can get it figured out. And hopefully it doesnt happen to me again. Sounds like I got lucky. If you open a ticket with that error code, im sure Bambu will know what it is right away. There are a ton of different filament sensors between the printer and ams.

5

yes, that’s what i thought with the sensors, the more i am surprised why the h2d thinks that there is still filament available, seems like some sensor is not working as it should… yes i have opened a ticket, hopefully i will get an answer soon… the first promle i had with tpu for ams filament

1 Like
6

I recall someone (probably on the FB group) had this issue, and it was an errant whisp of filament (not a full chunk) that was floating in front of a sensor - not directly blocking the path. I know you checked the extruder, but I’d take the idler+filament sensor assembly off, and unscrew the hall sensors and double check inside that cavity. Might be as silly as accumulated filament dust.

7

Hello,

If you can load and unload filament from the external side and run it through the internal buffer, then the printer should be working fine.

Are all the slots on AMS Pro 2 not loading, or is it just one?

Just one slot check that feeder unit they might have a filament sensor on the grey lever arm. See if there’s any filament buildup in there remove the sensor to inspect.

AMS 2 Pro Feeder Unit

You could also disassemble the AMS hubs and check the filament sensors. Look for any filament buildup, and remove the sensor to inspect it more thoroughly.

AMS Pro 2 Filament Hub