New hardened steel hotend. This is a weird failure. Pulled it after the filament quit being extruded because I thought it was it was clogged. Instead, I found this. It was on the back side where you couldn’t see it until the hot end was pulled. That’s where all my PLA was going instead of out the end of the nozzle.
Your nozzle definitely looks bent. That might have been the reason for the failure.
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That’s what I was thinking. And it went straight out of the box and into the printer. Was never dropped or had anything else happen to it.
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Reminds me of the failures I used to have on my Raise3D when the hotend would give out and split in the block that connects it to the actual nozzle. Looks like you had the same thing happen. It was either damaged (bent) in shipping and then cracked when it got heated up or it was damaged passing over a really adhered print and bent which then caused the failure you are seeing. Yikes!
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A while back, there were reports of the tube being pushed out of the heat break. It seems that it’s a press fit and that if there is enough back pressure against the nozzle, it can push it apart. If it came apart, that would explain the angle but maybe not the melted filament since it never made it to the hot end. A few reasons for excess back pressure would be a defective nozzle, a plugged nozzle or not enough heat.
This printed about 5 times with PLA. Failed part way through another object. Quit flowing after about one inch in height on the print. All prints were with Bambu Basic PLA using default settings.
I am having an similar issue, can anyone please take a look at the picture and let me know whats going on. I have had 3-4 successful prints and then this catastrophic failure. Plastic everwhere and it looks like something is bent. I opened a ticket but do not know how long it will take them.
Sure looks the same, except your failure is much worse!
Was yours a hardened steel nozzle or regular one?
For now, I left the hardened steel extruder in, but am using the original nozzle.
Have you reached out to Tech Support? I am wondering what would cause this.
Yes I did, but with the holidays, I wasn’t expecting a reply until this week.
Side note. With the 3rd party nozzles coming out, Bambu may want to look at a way to apply the quick change hot end from the A1 as an upgrade to the P1 and X1 series, or their spare hot end sales will tank.
They also need to come out with an upgraded P1/X1 series with the active flow rate compensation using the eddy current sensor. Probably wouldn’t be able to add it to existing ones w/o replacing several boards and a complete tool head change out.
Got it. Bambu should replace it, but they are so slow at times that I would probably just purchase a new one to get the printer back up and running. Good luck.
I’ll reiterate this just in case it gets lost in the thread. If these failures are on net new printers then you are seeing a failure due to manufacturing defect where the hotend is prematurely failing due to improper manufacturing methods of the material itself or perhaps damage during shipping. This would warrant a claim for sure. If you are seeing this type of failure after hours and hours (as in 100s-1000s) then you are experiencing fatigue failure in the hotend due to heating and cooling over and over again. That would be considered wear and tear and is thereby a consumable.
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Bambu Lab support replied last night, and they are replacing the hotend for me. Considering I contacted them between Christmas and new years day, I think this was a quick response.
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Update, new hotend received on the 6th. It was shipped on the 3rd. Everything happened really fast after the 2nd of January. This is a definite thumbs up for customer support. 
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Did they ever say what the issue might be? Im experiencing the same issue with my new hotend as well.
Nope, but I can think of 2 possibilities,
- A badly manufactured batch of hotends as you are now the 3rd person to post with this issue.
- With the 1.04 firmware, my printer loses it’s home every time I turn it off. Did not realize that when I first installed it. However, the build plate shows no signs of “collision” with the hot end. I now re home it any time I shut it off before doing anything else with it.
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