Issues when printing Prusament PETG Recycled Black
We need to print a lot of stuff on our XL at work in PETG and bought several spools of Prusament PETG Recycled Black. I used this filament at home on my MINI, and had no issues with it. We already printed over 1 1/2 spools of it but suddenly we ran into issues on the XL. The filament would start to grind down in the extruder and get stuck. We had this issue now on two of the 5 extruders (and I'm currently testing it on Extruder #1, just to be sure it is the filament and not the extruders).
It almost looks like the recycled filament is softer than regular PETG and I even reduced the extruder tension, which did not help. Interestingly, the print looks perfectly fine, until after several layers it simply stops extruding.
We have several spools of regular Prusament PETG (which so far always worked flawlessly) at hand, which I could test too... But before I do more tests, I wanted to ask here first if ...
- someone had similar problems with PETG Recycled Black too?
- this could be a sign of moist filament? (i.e., these problems started only after the spool was several days in room-air)
- this could be some issue with clogging I'm not aware of? (after unloading and loading the filament it extrudes fine)
I also noticed during filament purging that the flow was not "straight down" but it would immediately curl to the front and stick to the nozzle. Is there maybe something blocking the nozzle and thus after some time the nozzle cloggs up and the extruder can grind down the filament?
this could be a sign of moist filament? (i.e., these problems started only after the spool was several days in room-air)
Quite likely. This is one of the times of year when we see more moisture problems as, in the northern hemisphere, the heating is turned off and the AC has not yet taken over ... for me an afternoon is enough to degrade PETG so longer prints start perfectly with freshly dried filament but show issues before they finish.
Cheerio,
RE: Issues when printing Prusament PETG Recycled Black
Interestingly, we had no issues with regular Prusament PETG so far, even with weeks without a drybox... Usually the room is pretty dry (constant AC) but I also said to a colleague today that the room was feeling too warm... perhaps they did something over the weekend which killed the filament.
I'll see how it works on Extruder #1 and will otherwise put the filament into the drying oven...