RE: Nozzle cleaning consistently fails with PETG
Firmware 6.3.1 has fixed my nozzle cleaning issues. I only had 2 nozzle cleaning failures since the update and in those cases the nozzle was really contaminated with filament. That‘s the disadvantage of the new firmware: remaining filament is more difficult to see and to clean when a print job is finished as the nextruder stops at the right back corner.
RE: Nozzle cleaning consistently fails with PETG
The firmware upgrade certainly improved things but there are still other issues that need attention such as the pervasive VFAs.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: Nozzle cleaning consistently fails with PETG
The latest firmware did not fix the nozzle cleanjng.
RE: Nozzle cleaning consistently fails with PETG
The latest firmware did not fix the nozzle cleanjng.
You already answered a few posts ago, why repeat. I understand your upset and posting that all over the forum, but I'm trying to get some other users experiences.
RE: Nozzle cleaning consistently fails with PETG
Why?
Clearly it needs repeating. The poster before me just said that the latest firmware improved that.
It's clearly not the case and people need to know it. If you know how forums work. People rarely go back in a thread and only read the latest.
RE: Nozzle cleaning consistently fails with PETG
The firmware update did resolve the nozzle cleaning issue for me. Multiple filament changes between PC-CF and PLA all ok. Took a couple of purges to clean out the PC-CF when changing to PLA. I hope others have the issues with their Core One resolved. I've always found Prusa to be excellent working with users.
RE: Nozzle cleaning consistently fails with PETG
https://help.prusa3d.com/product/core-one
That is the changelog to the most recent firmware updates. That is directly from Prusa.
None of these updates make any reference to nozzle change routines. The fact thwt your machine is working is rather a fluke and the issue will come up again, likely when you change to different filament type. The nozzle cleaning procedure only works if the machine is run with pla, which happens to be a filament I will never use. I didn't buy this printer to print pla.
Here is a copy and paste of the change logs fmas well:
Version 6.3.2
14.04.2025
Adjusted RPM range check for the Print Fan test
Version 6.3.1
03.04.2025
Filtration support
MMU support
Automatic filament retraction
Configurable chamber cooling maximum power
Set chamber target temperature in preheat
Chamber fan spin check
Ventilation grille prompt
Door sensor calibration wizard (for kits especially)
Filament change confirmation prompt
Option to disable filament sensor during filament change
Added support for the “M30 Delete file” gcode [Public PR]
Increased “failing to reach chamber temperature” timeout
Increased maximum bed temperature
Park printhead in the back after print
MMU: Better nozzle compatibility check
Fixed: Restart on door open during pause
Fixed: Incorrect Z position when unpausing
Reduced USB errors
MMU: Fixed power panic during change
Version 6.3.0
31.01.2025
Prusa CORE One support
RE: Nozzle cleaning consistently fails with PETG
https://help.prusa3d.com/product/core-one
That is the changelog to the most recent firmware updates. That is directly from Prusa.
None of these updates make any reference to nozzle change routines. The fact thwt your machine is working is rather a fluke and the issue will come up again, likely when you change to different filament type. The nozzle cleaning procedure only works if the machine is run with pla, which happens to be a filament I will never use. I didn't buy this printer to print pla.
Here is a copy and paste of the change logs fmas well:
Version 6.3.2
14.04.2025
Adjusted RPM range check for the Print Fan test
Version 6.3.1
03.04.2025
Filtration support
MMU support
Automatic filament retraction
Configurable chamber cooling maximum power
Set chamber target temperature in preheat
Chamber fan spin check
Ventilation grille prompt
Door sensor calibration wizard (for kits especially)
Filament change confirmation prompt
Option to disable filament sensor during filament change
Added support for the “M30 Delete file” gcode [Public PR]
Increased “failing to reach chamber temperature” timeout
Increased maximum bed temperature
Park printhead in the back after print
MMU: Better nozzle compatibility check
Fixed: Restart on door open during pause
Fixed: Incorrect Z position when unpausing
Reduced USB errors
MMU: Fixed power panic during change
Version 6.3.0
31.01.2025
Prusa CORE One support
It was a previous revision 6.3.1, and it added a filament retraction at the end of the print. It fixed it for a few people on the forum.
I understand your upset, but please stop. Others can post their experiences too without you chiming in.
RE: Nozzle cleaning consistently fails with PETG
Why?
Clearly it needs repeating. The poster before me just said that the latest firmware improved that.
It's clearly not the case and people need to know it. If you know how forums work. People rarely go back in a thread and only read the latest.
A few posts later? I think probably not.
RE:
Clearly they left some items off of that changelog. The full notes on their github describe it though.
https://github.com/prusa3d/Prusa-Firmware-Buddy/releases
"Automatic filament retraction
We’ve introduced automatic filament retraction at the end of a print, with reinsertion just before the first extrusion. This brings several benefits:No filament remains in the nozzle during mesh bed leveling, helping prevent filament specs from being left on the print bed.The nozzle no longer needs to be heated for filament unload.
Note: This is a pilot implementation of the procedure. If it proves effective, we plan to extend it to other printers as well.
_Note: Auto-retraction is not performed for flexible filaments. To support this, we’ve added an "Is flexible" parameter for filaments, configurable via the GUI (for user presets) or using the M865 G-code."
I find it hard to believe it's a fluke - no filament at the nozzle, no leaking. But as the note specifies, not for flexible filaments. Is your filament not retracting? And not flexible? Perhaps it isn't doing its job when it should for another filament type.
https://help.prusa3d.com/product/core-one
That is the changelog to the most recent firmware updates. That is directly from Prusa.
None of these updates make any reference to nozzle change routines. The fact thwt your machine is working is rather a fluke and the issue will come up again, likely when you change to different filament type. The nozzle cleaning procedure only works if the machine is run with pla, which happens to be a filament I will never use. I didn't buy this printer to print pla.
Here is a copy and paste of the change logs fmas well:
Version 6.3.2
14.04.2025
Adjusted RPM range check for the Print Fan test
Version 6.3.1
03.04.2025
Filtration support
MMU support
Automatic filament retraction
Configurable chamber cooling maximum power
Set chamber target temperature in preheat
Chamber fan spin check
Ventilation grille prompt
Door sensor calibration wizard (for kits especially)
Filament change confirmation prompt
Option to disable filament sensor during filament change
Added support for the “M30 Delete file” gcode [Public PR]
Increased “failing to reach chamber temperature” timeout
Increased maximum bed temperature
Park printhead in the back after print
MMU: Better nozzle compatibility check
Fixed: Restart on door open during pause
Fixed: Incorrect Z position when unpausing
Reduced USB errors
MMU: Fixed power panic during change
Version 6.3.0
31.01.2025
Prusa CORE One support
RE: Nozzle cleaning consistently fails with PETG
You clearly do. I just posted the changelog. If you know how software dev works you would know how the nozzle cleaning was not addresses at all. But continue on your gas lighting trend. I will continue to post here and everywhere else as much as I want. Thanks for chiming in
RE: Nozzle cleaning consistently fails with PETG
They should have done the same thing just after inserting or changing filament! Or did they?
RE: Nozzle cleaning consistently fails with PETG
You clearly do. I just posted the changelog. If you know how software dev works you would know how the nozzle cleaning was not addresses at all. But continue on your gas lighting trend. I will continue to post here and everywhere else as much as I want. Thanks for chiming in
A dirty nozzle will cause it to fail. Filament oozing from the nozzle can cause this. So the retraction of filament after a print can reduce or eliminate the oozing, therefore fixing the issue for many.
So yes it did address the issue for some.
RE: Nozzle cleaning consistently fails with PETG
They should have done the same thing just after inserting or changing filament! Or did they?
They did. If you hold your fingers around the filament you notice how it pushes out after purging is done.
RE: Nozzle cleaning consistently fails with PETG
The latest firmware did not fix the nozzle cleanjng.
It did not fix it for you. Which is annoying, of course; I understand your frustration. Are you using PETG (which is what this thread is mainly about), or did your recent problems refer to the 3rd party fiber-reinforced Nylon filament? If it's the latter, which filament profile settings did you use?
RE: Nozzle cleaning consistently fails with PETG
The only time I have had a nozzle cleaning failure was when I forgot to remove the purge line from the previous print. 😲 No issues even with the original firmware and PLA, PETG, and ASA. Also none with the new firmware with ASA-CF and PC-CF.
RE: Nozzle cleaning consistently fails with PETG
Sorry to hear that 6.3.1 didn‘t fix everybody‘s nozzle cleaning problems. I fully understand the frustration as I was also not able to start any PETG-print successfully with 6.3.0. It often took 3 or 4 tries to be successful. It‘s a totally different experience since my CoreOne runs with 6.3.1 (I haven‘t recognized any differences between 6.3.1 and 6.3.2).
I hope that Prusa will find a solution for the users that still have issues!
RE: Nozzle cleaning consistently fails with PETG
You are funny. You continue to try to steer the blame. Stop it. Its always you in every thread.
Are you going to ask for every PETG made under the sun too?
This machine is running incomplete software deal with it.
This machine has also been deemed defective by Prusa yesterday.
RE: Nozzle cleaning consistently fails with PETG
Well, don't panic to use Trumps words. Yes, the filament retraction did something and solved the issues for some of us/you. If I remove the purge leftovers I am mostly good or fare a bit better. It is not the solution to all. but still better than before.
For me: ASA works well if the purge line is removed. For PCCF on the other machine I will collect some experience over the next days. Bt I greatly appreciate the filament to be fully retracted out of the extruder nevertheless. This has so many advantages.
RE: Nozzle cleaning consistently fails with PETG
For me, the issue has nothing to do with filament retraction, but with that bit of G-code Prusa includes that tries to level the bed based on a small sample of the bed. You can see this when you first start printing. The nozzle messes around in the front right corner before it moves on to sample what's needed for the print. This is well before it prints a line to prep the nozzle for printing (which happens after bed-leveling and right before actual printing begins).
I don't know what the purpose of this sample-based bed-leveling is given that the printer goes on to bed level without sampling, regardless.