Nozzle Change problems with stucking Filament

Bambu Lab H2D
1

Hey hey,
new day - new testing.

wanted to check the screws on the mounting plate but couldt get my nozzle out.
I tried to pull out the nozzle, but I noticed some resistance. After a closer inspection, it seemed to be a leftover piece of filament.
I had to heat up the nozzle first, purge a bit of filament, and then, while it was still warm, I was able to unload the filament and remove the nozzle.
From the pictures, you can see what kind of piece was still stuck inside.
By the way, it’s just regular PLA.
Now the question is – what was the cause? Did the cutter not work properly, or was it something else?

image
image1920×2560 347 KB

image
image1920×2560 209 KB

2

i think the cutter cuts above that point. I had the same “Problem”. Needed some force to get it out and was then able to remove the filament.

1 Like
3

hmmm imo this isnt a good decision … i have the feeling on the x1c and p1s its easier to change

4

its still easy and quick but i was also confused when it happend to me.

5

Theres always that little piece. Make sure to remove the front plastic toolhead cover before removing the nozzle.

3 Likes
6

Some people get their hot-end clogged because they load PLA in the hot-end when it shortly before was used for printing filament with high temp. The higher temperature in the cooling zone melts the PLA and makes it stick to the wall and does not release anymore at PLA temperatures.

This might be a cause of your issue.

7

nope, only printed PLA - so no HT material

8

Was your PLA still fresh and dry. PLA maybe brittle if not and can crack easily.

Would be good to keep an eye on it in case it happens again.

9

All is normal, it cuts above that piece of filament, not right at the hot end.

image-1
image-1932×523 59.6 KB

10

I’ve sort of fought this as well.

I’ll fully admit I’ve just been doing it without much knowledge… what is the correct process for a nozzle change? I’ve just been cutting them with the cutter, removing the nozzle and then yanking the little remainder out with pliers. Is there a retract action or something do first?

11

That is how the nozzles on the H2D and the A1 series work. Just leave the filament because removing it is a waste of time.

2 Likes
12

Think u didnt read ?
The nozzle couldnt be changed, because the filament was still so stury, that the nozzle didnt became loose…
I needed to heat the nozzle, to get the pla soft again

13

Next time just hit the cutter a couple times. The only time I had problems was before I realized I had to take the front clear cover off first, or the nozzle slightly snags on it. Also pull toward you and then down.

1 Like
14

My A1 got a tiny bit of filament on the nozzles hot plate, and sometimes it really glues the nozzle on to where it’s super hard to remove

Perhaps that is happening to you. I’ve had previous little luck getting it clean enough so it still happens once in a while.

15

I’ve had similar challenges with the nozzle change. It seems the right nozzle consistently has the longer piece but both leave filament in the nozzle. I did a few different experiments when I couldn’t find definitive instructions on how to deal with a used nozzle change. I heated the nozzle with a lighter after removal and it cam out easily. The left nozzles was too short so I just re-installed and purged and that worked too. So as mentioned above, I don’t think it much matters.

16

it’s normal, and it’s not a good design but it’s working.