Prusament PETG Matte Black
I have a roll of PETG Matte Black here. I read it can be a bit tricky to print, but I had no idea that it is that tricky...
While "Signal White" and "Urban Gray" print without any problems with the Prusament profile, I cannot get Matte Black to work. I started by increasing the retraction length up to 5mm, but that would not change anything. Then I reduced the temperature down to 210°C - at which I got reasonable results without excessive stringing, but the first layer quality degraded massivly.
I noticed that the nozzle gets dirty very quickly, i.e., filament attaches to all sides of the nozzle and I had to remove rather large clumps of filament after the print.
Does anyone has settings that give a reasonable print quality or could give some advise what other settings than temperature and retraction length I could test?
RE: Prusament PETG Matte Black
Did you dry the filament?
Regards,
Mark
RE: Prusament PETG Matte Black
No, not yet. It has been subjected to the room the same amount as the others - the Signal White was even open for weeks and prints very well - thus I did not suspect that moisture is the problem.
I can try that next week. Is the Matte Black more moisture sensitive than the others?
RE:
No, not yet. It has been subjected to the room the same amount as the others - the Signal White was even open for weeks and prints very well - thus I did not suspect that moisture is the problem.
I can try that next week. Is the Matte Black more moisture sensitive than the others?
I haven't tested Matte Black, but drying ALWAYS makes things better, with zero downside. Whenever I go to print, the filament spool goes into the dryer for a few hours before, and I live in the desert. Commercial molders always dry their material. Various materials and colors are worse than others, but since I always dry, I don't have a list of which ones. A heated dryer is needed. A dry box or desiccant bag does not cut it.
Regards,
Mark
RE: Prusament PETG Matte Black
Alright, will test. We have a very good heat controlled oven at work - I just need some screws for the spool 😄
But for example, I was gifted the spool of signal white, which was sitting in the box, without a plastic bag or silica for weeks, if not months. It prints beautifully, without stringing.
RE: Prusament PETG Matte Black
Sorry, took a while. Instead of taking the spool to work, I bought a Sunlu S2 and started drying the filament. I'm just 4h in but risked to do a print. So far, not much difference to the prints before with the default Prusament PETG profile. At 240°C, the strining is however reduced, but still worse than with other Prusament PETG.
While printing, I can hear some popping and smacking noises from the nozzle at 250°C. I do not hear those for other PETG... Does this indicate the filament still has too much moisture? I'll for sure dry the filament for much longer now and could even put it in the oven at work - which I guess has a much better temperature control than the Sunlu.
RE:
Ovens generally get too warm and don't have good control at temperatures that you need to use for drying. The S2 should be fine. If it's popping it definitely is still wet. Keep drying it. Very wet filament might take days to dry.
Regards,
Mark
RE: Prusament PETG Matte Black
Ovens generally get too warm and don't have good control at temperatures that you need to use for drying
Well - that oven is designed to hold anything between 30 and 300°C to +-1°C for several days 😉 I would trust it to do 55°C for 6h no problem. You can even log the temperature to a USB stick to check on it later 😀
Keep drying it. Very wet filament might take days to dry.
Will do. It's however interesting where it got the moisture from... Compared to other spools, this one was only a few hours outside. Is the Matte Black particular hygroscopic?
RE:
I recently got that filament, dried in food dehydrator in 70C for 10h and no issues.
The moisture comes from the environment conditions it was produced, packaged and stored.
Also notice that some filaments get really nasty when they are wet, much more problematic than the other ones.
See my GitHub and printables.com for some 3d stuff that you may like.
RE: Prusament PETG Matte Black
The moisture comes from the environment conditions it was produced, packaged and stored.
Ah okay, thanks for the information! I thought brand new filament would have perfect conditions. That's good to know.
RE: Prusament PETG Matte Black
Ok, yes a precision oven will work, but the S2 should do it. I agree use 70 C for PETG. 50 C is a summer day around here.
I also agree that some filaments just suck up water. Even here in the desert I dry filament if it hasn't been dried for more than a day.
Regards,
Mark
RE:
Amazing!
Left is the print from yesterday (ignore the distortion :D), right from today - after 7h in the oven. Both with the default Prusament PETG profile.
I think it can be dried even more, I can still hear some popping noises. I'll let keep the Sunlu running now.
RE: Prusament PETG Matte Black
Notice you may need to dry it after reaching half of the spool, sometimes those spool fragments inside of the spool tend to get less heat/air flow and thus may still contain more moisture than the outer fragments.
See my GitHub and printables.com for some 3d stuff that you may like.
RE: Prusament PETG Matte Black
the Signal White was even open for weeks and prints very well - thus I did not suspect that moisture is the problem.
It's often a matter of weather and season - maybe the wind delivers a different air mass or you turn off the aircon and wait a few weeks before using the central heating.
I thought brand new filament would have perfect conditions.
It was packed dry - but you have no idea how it was treated in transit or how long it was sitting on a warehouse shelf; then in humid air it can absorb enough water in an afternoon to ruin printing until it is dried.
Cheerio,