Prusament galaxy and marble with 0.25
Hello,
I’m new to 3D printing and, after just a short period of printing on a core one, I encountered a severe clogging in my 0.4 mm nozzle. It got to the point where I had to replace the nozzle after only one week. Prusa support and I went over the possible reasons for this failure and concluded it was just bad luck, but that explanation didn’t convince me fully. I really want to minimize the chances of this happening again, or at least reduce the likelihood.
I’m planning to start printing miniatures with a 0.25 mm nozzle, or small statues with very fine details, and I wanted to ask you, the experienced folks here, if using Galaxy or Marble Gray Prusament is a bad idea or if it could cause another clog in my nozzle?
Does this type of filament damage a 0.4 mm nozzle, and if not, is it dangerous for a smaller nozzle?
Thank you very much for your advice!
Best Answer by Raaz:
Galaxy should be fine with the 0.25 nozzle. Marble filaments.. Not sure.
The most important thing with the small nozzle is to print sloooooowly! I didn't get mine to clog yet, but only used matte black filament, no galaxy.
Instead of clogging, I had the extruder skipping. Just too much resistance from the tiny nozzle to squish the filament through.
I'd recommend to stay below 70 mm/s with the galaxy filament. Preferably more towards 30-50 mm/s.
Increasing nozzle temperature doesn't help that much, because the heatbreak will also be hotter, which makes the filament in the extruder gears softer and more difficult to push through the nozzle.
So maybe leave the door open, when using the small nozzle, so the chamber stays cooler.
RE: Prusament galaxy and marble with 0.25
Very fine detail eh, sounds like you might want to explore resin printers instead...
As for your clogged nozzle, I have gone through several rolls of PLA galaxy black, not a single issue
RE: Prusament galaxy and marble with 0.25
Probably something i will try in the future yes but i wanted something more versatile to be able to easily try differents thinks ^^
Okay thanks you 🙂
RE:
I have seen recommendations from various filament manufacturers to use at least 0.4 mm nozzle size for PLA with added glitter particles. Prusa seems more optimistic and states that 0.25 mm nozzles should be fine with the Galaxy filaments. See https://help.prusa3d.com/article/different-nozzle-types_2193#other-considerations
RE: Prusament galaxy and marble with 0.25
Galaxy should be fine with the 0.25 nozzle. Marble filaments.. Not sure.
The most important thing with the small nozzle is to print sloooooowly! I didn't get mine to clog yet, but only used matte black filament, no galaxy.
Instead of clogging, I had the extruder skipping. Just too much resistance from the tiny nozzle to squish the filament through.
I'd recommend to stay below 70 mm/s with the galaxy filament. Preferably more towards 30-50 mm/s.
Increasing nozzle temperature doesn't help that much, because the heatbreak will also be hotter, which makes the filament in the extruder gears softer and more difficult to push through the nozzle.
So maybe leave the door open, when using the small nozzle, so the chamber stays cooler.
RE: Prusament galaxy and marble with 0.25
Thanks you a lot it's very intresting !
For the galaxy and marble event with a .4 nozzle do you advice to slow down the print speed too or for you it should be fine ? Sine my .4 got a very bad clog i'm a little bit stressed to use the galaxy I have...
RE: Prusament galaxy and marble with 0.25
The issue with the standard 0.4 nozzle is that the high flow channels clog a lot easier, when the filaments contain particles, than a non-HF nozzle.
Slowing down always helps though you get a more evenly melted filament and the particles have more time to adjust and not get stuck. Up to the point, where the extruder starts clicking/skipping.
But it's not a real clog then, since the filament isn't stuck in the nozzle, it's just the extruder gear having issues with too soft Filament.
You just need to let everything cool down, then open the extruder idler with the lever, select the nozzle temperature to go up to 260°C (for PLA) and then go to control - > axis - > extruder and when the temperature reaches 230°C, start pushing the filament and slowly turn the control knob to "extrude" some filament (grabbing close to the ptfe tube entry at the right, outside the printer).
At some point, a big blob will flow out of the nozzle, probably with some "smoke", due to the too high temperature.
As soon as this happens, push a bit further, then hit the X button on the lcd panel, restsrting the printer.
This will switch off the heater, but keep the fans spinning to not get heatcreep. Close the extruder lever and that's it.
With my mk3s, opening the extruder was enough to freely push filament through the nozzle, but with my Core One, the extruder gear makes contact with the filament all the time, so I can't just push manually. I need the gear to slowly turn too.
RE: Prusament galaxy and marble with 0.25
Ooookay ! I understand ^^
I will keep your advice to unclog/help the extruder for the next time I have an issue and if I understand correctly, with non "pure" filament it's better do slow a little the print speed to prevent issue but too mutch will cause unstable extrusion.