This thread does not give me confidence in Bambu’s ability to ship a future toolchanger if they can’t master a purge wiper.
Thanks for spending the time to report this disturbing assembly issue.
Not the BL experience that has made the brand so successful(!)
As a Bambu Lab potential customer I have not yet dropped my AU 3K plus on the H2D + AMS. And frankly I am underwhelmed BL did not give this obvious quality control/factory build issue much higher priority.
I think you had more than enough reason to have the printer exchanged without question.
I am leaving my purchase decision to near the end of the sale in the hope that early production issues have been resolved to minimise risk.
I can only hope that BL has reviewed their production line and QC processes to ensure this problem is not repeated.
It’s now November 2025 I hope this recurrent issue has been fixed.
I plan to purchase my H2D early Dec. But it still feels like rolling dice whether I will have issues or not.
I can’t see how the H2C (which is even more complex) will not have teething problems - unless BL considerably steps up Quality Control.
Fully agree - at the high price point there should be no poor assembly issues.
I expect when I upgrade to a BL H2D it performs to advertised specifications with no faults but after some research I have serious doubts!
It’s should not be up to the Customer to be the Quality Control Inspector and repair technician.
This is my proposed Purge Wiper fix Template to fix H2D Purge Wiper by trudelle MakerWorld: Download Free 3D Models
well my H2S just came like this and melted the side of the plastic on the shoot from the hotend, this was while loading in the filament for the 1st time on it. Opened a ticket and better get some extra warranty for this hassle.
yesterday i found out this same issue on my week old H2S. i am not sure it came like that from factory or some how happened during purge.. wonder if it going to happened again.
While mine came installed properly, I’ve noticed an issue with my nozzle wiper.
When the toolhead goes back to purge or clean the nozzle, everything works as expected, but when the toolhead moves away the rear lever (with 2 wheels) should pop back up, causing the nozzle wiper to fall back down into place. However, mine gets stuck for a second or so, then plonks back down. I feel it’s getting stuck at the lever end at the back. Any ideas?
Yes mine was like that, the corner of the lever sticks against the rear wall of the purge basket
You can access it just by removing the top cover inside the printer (3 screws). Take note or make a picture how the levers and springs are installed but it’s not complicated.
I started by filing a bit that corner (no improvement could even make things worse) but the solution was simply to put a little grease on that lever corner, no sticking since
Cheers bud - I’m trying to avoid taking it out as my printer backs into a corner and moving it is a pain! lol. I’ll try a small bit of grease though - I think that may do the trick!
Thanks!
Yep, it’s accessible from the front as the cover is inside the chamber
The next time I have to remove the rear cover I may try heating the basket location at the lever corner location to give it some ckearance
I just signed up to thank the original OP for this write-up. It ended up being my problem on a new H2C. Didn’t notice it at all during setup. Calibration went fine. A couple prints were good, but then I heard how long it was banging the chute and felt it couldn’t be right. It definitely added some undue wear to a brand new machine. I do feel like Bambu Lab should offer something for this and will still write them. Even though it’s a hassle, I’m considering returning the machine over it even though it seems to be working well now.
Anyway, thanks so much. I was going nuts.
Thank you for this, had mine for over a year and 1000+ hrs of printing when it suddenly started slamming into the assembly.
I lucked out in that the only damage appears to have been the flow blocker, but it sounded so much worse, and was oddly inconsistent.
Very glad someone posted about their own experiences to narrow this down so quickly once the issue arose.
I wanted to come back to this thread and say something I probably should have said a long time ago.
When I originally posted this PSA, I honestly had no idea it would help so many people. I was simply trying to document what happened to my machine, warn others before they experienced the same failure, and hopefully save someone from unnecessary damage, downtime, or frustration.
Seeing the number of replies, confirmations, photos, fixes, and shared experiences over the past year-plus has been unbelievable. I’m genuinely grateful to everyone who contributed, tested, explained, documented, and helped other users identify the issue. This is exactly what a strong community looks like.
At the same time, I have to be honest: it is incredibly disappointing that this issue appears to have persisted for so long. What started as a warning about a purge wiper assembly problem should not still be something owners are discovering the hard way, especially after this much visibility and community documentation. Even more concerning is seeing similar concerns continue into the newer H2-series machines. As someone who is also a customer of those machines, that is frustrating.
I still believe Bambu makes impressive printers. That is part of why this bothers me so much. A machine can be innovative, fast, and capable while still having a mechanical issue that needs to be acknowledged and properly addressed. Users should not have to rely on forum posts, community photos, and unofficial checks to catch a problem that can damage the toolhead.
To everyone who found this thread useful: I’m glad it helped. To everyone who added their own experience or helped another user avoid damage: thank you. And to Bambu: please take this seriously, not just as isolated user error or assembly variance, but as a design/quality-control issue that deserves a clear, official response and a lasting fix.
This thread has shown that the community is paying attention, willing to help, and willing to document problems carefully. I hope the same level of attention is met on the manufacturer side.
Thank you so much for this post…I was pulling my hair out with a brand new H2D laser bundle.
My H2D was experiencing these same problems (where the heads are banging the purge wipers and knocking the silicone scrubber out of its mount, and worse - getting stuck behind the thin black metal cutter. I’m still worried I damaged my head, but I’m running a test print now and (touch wood) seems to be working. There’s a little bending in the cutters of the purge assembly but they don’t seem to have a problem right now.
Bambu needs to know this happening in their manufacturing.
Thank you so much!
My new machine arrived with the purge chute installed just liike yours.
Would not calibrate and jammed until I corrected the install.
I had this same issue with a brand new H2C (non-laser) that I received about two months ago during the anniversary sale. Couldn’t for the life of me figure out why the heck my P2S for the entire six months of ownership was truly the “Apple of FDM”, just download-and-click-print consistently and reliably like I read about Bambu machines leading all the way up to my purchase of the MUCH higher-end and higher priced H2C.
I was so excited then so inexplicably disappointed when every print was marred and tarnished by the lack of nozzle wiping due to the wiper being launched from its nest EVERY. SINGLE. TIME. The head/nozzle hit the filament breaker (poop-shooter) several times very hard, to where I had to power off the machine and manually dislodge the nozzle from its perch contacting the metal pieces.
I just happened to run across an official Bambu Wiki article that referenced the purge chute having it’s tabs externally visible as a possible culprit with an accompanying photo. I’d tried everything else I’d found online except checking for that manufacturing/assembly defect so I ran to my printer and sure enough, it was just as OP described. My luck being deficient as a general rule, I didn’t discover this thread until shortly after I corrected the issue.
But once I corrected it from inside the enclosure by pulling up on the purge chute and wiper assembly and placing the tabs in their appropriate location using moderate force out of pure annoyance and frustration, every print since has been like my friendly and faithfully dependable P2S.
What an amazing machine. Sad to see that Bambu has only gone so far as to author a wiki article about it yet evidently hasn’t put in place some quality control double-check to prevent this mishap from happening to more and more hopeful customers and the sheer disappointment in the brand it fosters. We should not be expected to jump through these flaming QC hoops after spending $2k+, not to mention the headaches and frustration experienced in the process of performing Sherlock Holmes level troubleshooting. It’s ■■■■-poor and tarnishes the brand. Bordering on negligence IMO.
I just got my printer on Monday and printed one thing. Then I went to print the second one and it started making all kinds of noise and an error came up. I looked inside and noticed the nozzle wiper and come out. I reinstalled it and tried again and then I noticed the nozzle blocker was bent down. I replaced that and tried to unload the filament and the nozzle wiper popped off again. That’s when I found this post and low and behold mine looked just like the photo above. I carefully lifted it and placed in back where it belonged and it seems to be printing without problems now. Finger’s crossed.
I don’t know if this is cause or effect, but the bambu wiki shows the two lower screws on the rear of the assembly and says that the hole is “u shaped” and the screws should be at the top. Mine were at the bottom. Either they ooosened and allowed the unit to move, or more likely the assembly was hit a lot until the screws loosened. I didn’t loktite them when putting them back, but probably should.
Not sure if done but maybe it would help if everyone seeing this issue open a support ticket with Bambu?