It has 481 hours of print time. My printing has been 85% PLA, 10% PETG, and 5% TPU.
The PTFE feeder tube for the left (primary) extruder has split. I discovered this when I started a print, walked away, and later received a phone notification about the front cover being off the printer.
I went to look and saw a lot of filament floating around inside the chamber! It had escaped the PTFE tube! I guess the AMS 2 kept pushing it because the print head was saying, “Hey bro, I haven’t yet received any filament.“
I got the filament back up into the AMS and took a look at how the filament escaped the PTFE tube. It was obvious: There’s now a split in the tube where it’s been rubbing up against the glass top.
I’ve heard the tube assembly rubbing against the glass top during a print as the head moved back-and-forth. I assume that Bambu Lab took the interaction of these two parts into account in their design. But, I guess not.
So I’m going to submit a warranty claim for a new PTFE feeder tube.
Has anyone else experienced this feeder tube failure?
Seems to be an issue Bambu has not addressed. I printed a 20mm riser and that helped but the left tube still rubbed on the glass a little bit. I finally printed two new clips to replace the existing ones. The Bambu clips have the aux tube running along the side and the main tube running along the top. The new ones I printed move both to the side. Not a huge difference but with the riser I only had a little bit of rubbing to start with. The new clips were enough of a difference where I no longer have the tube rubbing along the glass. Sounds like I did it just in time as I have similar hours on my printer.
I submitted a support ticket. BL’s response was to say my 2-month old printer has “long term use” and they will replace the tube just once.
~~~~~~
Hello, the internal space within the toolhead is relatively compact, and it is a normal phenomenon for the PTFE filament tube to have friction with the surrounding areas while in a bent state. According to our testing, the PTFE filament tube may indeed experience a certain degree of wear, but this would not affect normal printing. In extreme situations, however — such as in your case — after long-term use, the filament tube may become worn and aged, and you may then directly replace the filament tube. In addition, we will also be researching further optimization solutions, in order to provide our customers with an even better user experience.
Since the filament tube is not covered under our warranty, but considering the special nature of your situation, we would like to arrange a special replacement of a new filament tube for you. Please kindly note that this is a one-time special replacement, offered only this once.
This is another reason for a vented riser. The risen area lets those ptfe noodles fly free and clear. And you get the bonus of the most reliable force in the world to keep your PLA cool - nature. heat rises, yo, let it leave
Printing the little rings to go around the PTFE tube sounds like it might be cheap insurance against this happening again. Just have to inspect the rings occasionally and replace as they wear down.
To those of you suggesting I should print rings to protect the tube, that’s a great suggestion and I’ll do that after my printer’s back up.
But I am still irked by this. This is a design flaw in the X2D. I shouldn’t have to print little rings, no matter how cheap they are, to prevent this tube damage.
Anyway, I sent in my information and they’ll send me a replacement tube. Thank you all!
You are right, and not only this but all added to the tubes and the chain will add more mass, vibrations and noises. It seems like the riser is the best solution if possible to be installed. But if the printer is used for engineering stuff, it need to be air tight and high temp enough.
For me they are not very interesting , but scream bad design on the first place. Then we need to apply workarounds like this. And for me the riser is better but if you do not have bigger printer you need to print it on parts, and then assemble it, which I do not like for now.
And of course we can use other type of sleeve over it, duct tape, some wire … You can see all kinds of “add-ons” to the just print printers, otherwise they may stop printing, or do so with bad quality.
, but scream bad design on the first place. Then we need to apply workarounds like this. And for me the riser is better but if you do not have bigger printer you need to print it on parts, and then assemble it, which I do not like for now.