Sorry to resurrect a thread from the dead… but I’m having a similar problem and thought it better to resurrect than to post another one with the same question. I’m trying to print a fairly small part, and I’m getting what appears to be seepage through the layers.
I’m using a Taz 5 with the MakerGeeks PETG filament (though I have legit taulman t-glase as well… same problem for both). Clarity is not important for these parts, but they need to be food-grade.
I’m printing between 235 and 245c, with my bed at 60c. Based on what I’ve read, various things like layer thickness, temperature, retraction, etc may all affect this… so I’ve played with all of it. I’ve also tried setting my nozzle size in cura to .6 (on a .5 nozzle), because I read somewhere that this would make it overextrude just a bit and may help seal the gaps. so far, no joy.
I did notice that I have tiny bubbles as well when I just do manual extrusions, just like the OP said. These are present in both the Makergeeks and the Taulman filaments… I read somewhere that they might be related to temperature (some post said to crank the heat up until you see bubbles, then back off 5c), but they’re still present at 235c, which is a full 10c lower than the recommended printing temp. I’m hesitant to go lower, because I read that higher temp = more watertighness.
I’ve attached my STL if it helps. Cura doesn’t seem to like it much, probably because of the fork, but if I print it with both ends of the ‘y’ on the bed, it seems to handle it a bit better.
I can try to print it as a ‘follow mesh contour’ as brent.I suggested… but I don’t know how to print them without the top layers… and the thing needs to be a tube.
I’m trying to get these printed in the next couple of days for a halloween party… if anyone has any recommendations, I’d greatly appreciate it!
vented connector.stl (317 KB)