Having the same issue here. Mine just came in a few days ago and started acting up at initial calibration. I may have to send it back if there is no effective solution to the problem. Sad because I haven’t been able to print anything yet. This thing is too expensive to be rendered useless by such a minor part. It’s like a Ferrari being rendered useless because it’s wipers don’t work.
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I am very very happy with my H2D, even it does not have the part I was removing.
For me the print results are very good. Much better than with my old X1C.
However, I am mostly printing 1 filament technical parts.
I hope for a “solution” / “fix” from BambuLabs in the long run.
I like my H2D as well. Just had this one issue. Seems like the mechanism that moves the flow blocker around may be just slightly misaligned on mine. It is working now but they are sending the lifting motor assembly that has the arm that moves the flow blocker for me to swap out. I suspect that will fix it. It is so much trouble to do the swap, however, that I’m not going to do it unless I have an issue again.
Same issues here, I had troubles getting passed the initial setup and I noticed that my issue or at least appears to be a defect or possibly some glue resin that doesn’t allow for proper shifting. I thought I had it solved until had a print fail because I have never been able to overcome the bed leveling failure that seems to correlate back to the moving from left to right head. I took it back today to a full factory reset and am back to not being able to get past the goo stopper failure. I believe like you I will now just take the whole assembly apart and file off the defect. My printer is 5 days old with one full print under its belt haha.
Having the exact same issue - when moving the flow stopper from under the left nozzle to under the right nozzle, it gets stuck under the right nozzle but at the wrong angle, and needs a tiny nudge to click into place. I’ve been using a metal ruler to poke it whenever it changes from the right nozzle to the left nozzle, and it’s really annoying. I may just remove the flow blocker - or, I may try to print a little poker-stick that stays in place next to the right nozzle and ensures the blocker snaps into the correct angle.
Have you read the flow blocker guide on Bambu wiki? It has all the info on how to reposition it, how to take it apart and put back. It’s how I fixed my issue.
I just removed the whole thing, and all is fine for me.
Maybe if you often use both heads in your prints, you may get little filament sprinkles here and there.
In this wiki “Repair and Replace H2D Flow Blocker | Bambu Lab Wiki” they explain how to adjust the flow blocker if it is too close or to far away from the nozzle tips.
Mine was fine in terms of distance to the nozzle tips, but somehow did not move to the right-most position (seen from the front) and so hindered the other nozzle to move into “active” position and because of that an error was given upon initialisation of the print.
The design of this part with a magnet and being moved by the traveling heads is just a “mess”!
Hi guys, I have exactly the same problem. I noticed that the tall magnet seems to get caught on the edge. I solved the issue as follows: in my kit, there were these orange stickers, and something similar is already stuck onto the magnets under the nozzles — but the middle (angled) magnet didn’t have any sticker on it. So I just applied one of the included stickers from the kit onto that magnet.
And now it’s been 3 days without a single issue during toolhead switching.
Support didn’t give me any answer either, and in the live chat they said they had no idea what those stickers were for — just shrugged their shoulders
I think that some of the units have just a very slight alignment issue that happens to cause the tight tolerances of the flow blocker arm/magnet interaction to bind a bit. After some use of mine, it is working ok now even without using the radius-ed part I used to get it to work. Putting those teflon/kapton or whatever stickers on it lubricates where it hits I imagine.
I think this has something to do with the hot end. I couldn’t manually switch from right to left, but when I swapped the right hotend for the left, I could. I replaced the left and all is good. I can’t figure out what is wrong with the hotend, as it doesn’t look bent or anything, and isnt clogged.