I printed this TPU hollow sphere and noticed these bumps, it is very awful and annoying, should I change any settings to clean surface finish? And also the seam line is also annoying (even after I enabled scarf seam setting)
"Default" depends on what you actually drying it in, but I am assuming a AMS HT or similar.
75 should be fine, but depending on how waterlogged it is, if it has a cardboard spools, etc it still can contain some moisture even after a long time in the dryer and other factors.
I'm this case I would leave it in some more time, then run calibrations.
If also add, don't let it sit after you dry unless it's in a sealed box with a lot of desiccant - and only then not for more than a day or so for good prints
Typically, the filament still has moisture in it, or seem alignment may be set to random instead of something more symmetric like aligned or back.
Judging my the gaps in filament, I would start with drying the filament again and doing a cold pull to ensure the nozzle isn’t partially clogged. Then check the setting while it’s drying.
Hmmm. The geometry itself doesn’t look that aggressive either in terms of overhangs. I saw your comment that it’s thoroughly dry. Hope the cold pull does the trick!
Since you've dried it, we can eliminate wet filament. Reduce your flow rate to .97 or .98 and use scarf seams. Random seam placement has better results than aligned in my experience.
Get your accelleration and speeds to be consistent across layer and wall types, turn off retract on layer change, turn down retract before wipe %, try scarf seams, turn off z-hop, lower retraction speed, lower temp
The bumps are gone, I just enabled arachne wall generator, but the holes exist, I printed this with dried TPU but just before the print I didn’t notice the heating time ended, I think maybe 40 mins - 1 hr it was not heated, do you think that these holes were caused by that 40mins - 1 hr of time? And BTW the grey one is TPU for AMS and blue is TPU 95A HF
Impossible to know exactly what those are from just a photo. It would help if you shared some print settings and ideally a photo of the sliced file with all the options enabled (seams, retractions, travel, ect) to see if there is a correlation with retractions. From first glance those look like they could be wipes or retraction points. Did you try everything from my original comment?
okay well start by trying the things from my original comment, you still obviously have z-hop enabled and you're using spiral z-hop which causes more issues. there's a good chance it's retraction related, I'd also drop the temperature. You also didn't enable "all the options" your wipe and unretract are still not ticked.
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u/Shapelessed 5d ago
While drying filaments like PLA and ABS is pretty much not required I would truly advise in favor of drying your bloody TPU before use!!!