Tpu printing issue please help
Hi everyone, Please help — I can’t figure out what’s causing these print errors in my slicer. The filament is Sunlu TPU, brand new out of the box (so it shouldn’t need drying). I’m using a 0.8 mm nozzle, with a layer height between 0.2 and 0.35 mm, and a print speed around 25 mm/s. No matter what I try, I can’t get a clean print without these failures — the issue always appears in one corner.
Any advice or suggestions on what settings I should adjust would be greatly appreciated!
Whilst I suspect you do have a geometry problem in the corner it is being magnified and masked by moisture; never assume new filament is dry.
Dry your filament and try again. If problems persist first try rotating the print on the bed - if the problem moves with the print it is probably something in the file/settings, if it stays in the same position relative to the printer it may be a cooling issue.
If it seems to be a file issue save your project as a .3mf file
Files > Save Project as
Zip the .3mf and post it here. It will contain both your part and your settings for us to diagnose.
Cheerio,
RE: Tpu printing issue please help
I agree with diem.
Post the STL and I will also give it a test.
What are you auxillary fan settings ?
From the photos it looks like an air vent of some kind, so why TPU ?
I have had good success with carbon impregnated filament for these type of prints. Recommend ZIRO.
Cheers,
RE: Tpu printing issue please help
Also orientate the part 45 degrees on the bed, it could also be a belt tension issue, if OK
then if it is still an issue, flip the print over on the heater plate, vents look 45 degrees so no different geometry issues.
Cheers
RE: Tpu printing issue please help
Hi This is a small part of big part wich is 400gram , after changing the filament this starts happend , This is ventilation grill wich is made from tpu against impacts in my maschines so is needed tpu . I will post right now
the part and gcode
Thanks
RE: Tpu printing issue please help
this is the step file
RE: Tpu printing issue please help
I will make test for reorient the part thx
RE: Tpu printing issue please help
Additional photos o ready product with failures and good part ,modell is the same
RE:
There's something weird with the kratka2.3mf file that you uploaded, because there're no print settings in it, as if it were a *.stl file. Did you use Prusa Slices to save this project ?
RE: Tpu printing issue please help
@artur5 is right, you didn't save the project from PrusaSlicer with the settings - but a simple test, slicing with default seam settings, puts a seam in that corner and together with the 48° angle it's probably dragging ...
Try different seam position settings; if none of the presets work you can paint your own seam.
Print Settings > Seam position
- you will need to be in expert mode.
Cheerio,
RE: Tpu printing issue please help
I make test with Dryed fiament nothing happend
RE: Tpu printing issue please help
No orca slicer I make with prusa one wait
RE: Tpu printing issue please help
I try lot of the seems but painting is is impossible to make when i make choice another setting with seam is worst and worst , when i bought this printer was almost perfect , now looks ugly where you see the 48 angle I measured today the angle on modl is about 42
Bart
RE: Tpu printing issue please help
the prusaslicer 3mf file
RE: Tpu printing issue please help
It’s strange — I’ve noticed that the defect always appears on one side where the seam is, and another similar defect shows up parallel to it on the opposite side, even though there’s no seam there.
Try rotating the part 45° on the bed.
Cheerio,
RE: Tpu printing issue please help
the last picture rotated on bed for 45 ,the rest is sliced in cura
RE: Tpu printing issue please help
Hi,
Looks Like too much retraction.
The squishy Filament needs more time to get the Filament flow right.
Try dissabling retraction
RE: Tpu printing issue please help
Retraction is 0.6 mm the same print on this setup with pla
