https://youtube.com/shorts/k1-TtmtXQCc?si=CA_4ZtEE74JWZItw

I have a problem with my printer. White smoke comes out from the hotend? Maybe. I change everything to sure. Hotend, nozzle, thermistor, cartridge heater, ptfe tube.

As result?! The same thing. White smoke and smell.

Any thoughts?!

I’m running into a very strange print failure and I’m hoping someone here recognizes the pattern or knows the root cause.

I’m printing a lattice-style model and the outer perimeters seem mostly okay, but inside the structure I get massive random stringing/cross-connections between cells. It almost looks like the nozzle is “drawing” across open areas instead of following the intended paths.

The issue appears consistently on multiple parts in the same print job.

Printer/setup:

Printer: Core One+

Material: PETG

Nozzle: Prusa CORE One HF0.4mm

Layer height: 0.25mm balanced

Slicer: PrusaSlice 2.9.4

Firmware: 6.4.0 (downgrade from 6.5.3 because of failed filament sensor calibration)

Temps: 220°C for other layers (if I use higher temperature stringing occurs)

Filament: Geeetech 220 – 250 °C

What I already checked:

Filament is dry (or at least should be)

Bed adhesion is fine (used clue)

Belts are okay

No obvious clog

What confuses me:

The defect occurred after about 24 hours of printing

Has anyone seen a failure pattern like this before?Any ideas what could cause it?

Thanks in advance!

Voici un exemple de modéle et sa découpe : 

L'exemple se voit trés bien sur le bras où il fait des trous....

Il me fait ça sur tout les fichiers....

Merci de votre aide

I installed the new 6.4.1 firmware in my XL5 and one of the features included is the ability to change a filament on an extruder that is not currently printing.  I have a print I am trying to do that has 6 colors so this seemed helpful.  Started the print.  The filament in question that would need to be changed was in EX3.  The color finished and while the printer using EX2 I decided to change the color on EX3.  This process all worked very well except moving back to EX2 after the change and resume printing.  When the print resumed on EX2, the bed was too high by about 1mm and the extruder started colliding with the print and the it knocked off my supports causing me to abort the print.

I am guessing my alternative is to add a M600 command and do the change manually, but has anybody else experienced this?  Any known fix yet?

I have a dual-printer setup consisting of a Prusa XL and a Prusa MK3. My Raspberry Pi running OctoPi is actively controlling the MK3, but I am also utilizing its webcam interface to host a USB camera that is physically installed on and monitoring my Prusa XL.

To bridge this camera feed into Prusa Connect for the XL, I'm using the community plugin prusa_connect_uploader (by rizz360 on GitHub). The integration works great for pushing standard snapshots to the XL's cloud dashboard!

However, I am trying to optimize this remote monitoring experience and would love to get your insights on a few limitations:

1. Continuous Live Streaming in Connect

Is there a more seamless, continuous way to view a constant video stream directly through the Prusa Connect web interface for the XL, rather than relying strictly on periodic static snapshots?

2. High-Frequency Snapshots (0.5s - 1s Interval)

Locally on my OctoPi instance, I can set a very fast snapshot interval (every 0.5 to 1 second), which creates a smooth, near real-time visual feed. Currently, Prusa Connect refreshes the XL's feed every 10 seconds, which feels quite laggy to monitor. Is there a workaround to allow Prusa Connect to accept high-frequency updates for a smoother, pseudo-RT stream experience?

3. Camera Zoom Control via Connect

Is there any existing method, plugin setting, or upcoming feature that allows us to control the webcam's digital or hardware zoom directly from the Prusa Connect UI, without having to log back into the local OctoPrint server of the MK3?

Would love to hear how other multi-printer users are optimizing their webcam feeds on Prusa Connect under similar setups.

Thanks in advance for your help!

I am new to 3D printing, and after having some fun with PLA prints, I finally decided to try PETG and got slightly defeated :) so I decided to ask for some advice.

I am printing a small model with a slight slope that is placed on supports, and the issue I am having is that no matter what I try (with my limited knowledge), it always lifts from the supports on one side — always the same one. It does not matter how I rotate the model on the build plate. I thought maybe uneven cooling was causing it, and rotating the model would either fix it or at least move the issue to the other side.

The lifted part is circled in red in the pictures.

I am printing on a Core ONE with a 0.4 nozzle using Prusament PETG.

I tried lowering the extrusion multiplier first to 0.95 and later to 0.93. At the beginning, the prints had small blobs on the sides, which this adjustment got rid of.

I also tested different settings and configurations:

I tried layer heights of 0.15 and 0.20, as well as variable layer height.

Nozzle temperatures: 255, 250, 245, 240

Bed temperatures: 80, 85, 90, 95

Fan speed minimum: 10%, 20%, 30%

Fan speed maximum: 25% and 30%

Support styles: Grid and Organic

Top contact Z distance: 0.1, 0.15, 0.2

Interface pattern: Rectilinear

I also tried printing with the top cover closed, open, and completely removed.

Depending on the settings, I get either a matte or shiny finish and more, less or no stringing, which I understand. However, regardless of the settings or the model rotation on the plate, I always get the same part of the model lifting from the supports.

I would greatly appreciate any help or advice. If anyone wants additional pictures or the file itself, I can upload them.

I didn’t tighten the thumb screws enough on the nozzle, and it pushed out of place 2 min into my first (ever) print. I stopped it as as soon as it happened. There is no visible damage to anything. Except for Benchy. Poor Benchy.

Filament isn’t flowing. The nextruder gear clicks. I’ve gone through the help article on clearing out the nozzle. I was printing  with the included orange PLA, so I heated it up to 260 as instructed and tried manually pushing filament in past the Nextruder gear. But it’s not pushing through. I did let it warm at the 260 temp for a while and some filament did drip out, but eventually stopped.

If I use the needle, it pushes up into the nozzle far enough to touch the filament I’m pushing from the other direction. So there is a path there… but the filament doesn’t push down far enough to get heated and push through. I can push filament in about as far as the copper band on the nozzle. But it’s like there’s filament up there that’s not heating and then not flowing…

Anything I should try?