Overture TPU
So I am fairly new to 3D printing. I am in the technology department for the local school system and we have been printing these badge holders in overture TPU overall the print is pretty good except I keep getting little bumps scattered through the layers.
Currently I keep the TPU in filament Dryers and Im using the Generic FLEX profile with temp set to 230 and bed temp to 60.
Ill add a picture when Im on better internet.
Where should I start in adjusting my settings to get a cleaner layer lines.
RE: Overture TPU
I am just guessing as I don't know your exact STL or exactly how you printed, but is it a "seam" issue? If you have 'random' seams (search for the word 'seam' in expert mode) .. you'll get 'zits' in the layers.. You can paint on the seam where you want it to go .. or choose 'align' and it will attempt to hide the seam on an edge.. Do a little research on seams and alignment and you'll see what I mean. Not sure if this is your issue.
RE:
That definitely sounds like my problem. For the life of me I cant get this picture to post. But after looking up seams that sounds exactly like whats happening.
RE: Overture TPU
As Crab said. Without a photo hard to diagnose but my guess is you're seeing the random z seam. The other common source of zits is insufficiently dried TPU. The difference between dried and moist TPU is dramatic, but OP said s/he has dried the filament. Settings are fine for Overture TPU.
RE:
I spent a lot of time tuning prusaslicer to print Overture TPU while still using IS on my MK4. Below are the settings I used
Select AmazonBasics TPU to start
Under Print settings
Skirt and Brim-> Set Skirt to 3 loops (this deals with a string that I kept getting from the purge line to the print)
Under Filament Settings
Filament -> Set Extrusion Multiplier to 1.13 , Set first layer temp 210 and other layers to 220
Filament Overrides->Retraction-> Retraction length 3.2 (make sure to loosen your idler screw before you print or the filament will bind)
Under Printer Settings
Custom G-code->Start G-code (Here we are going to adjust be bed leveling temperature (to 190 from 210 ) for probing so you don’t get dots on the PEI when using TPU/FLEX)
Replace the following two lines
M104 T0 S{((filament_notes[0]=~/.*HT_MBL10.*/) ? (first_layer_temperature[0] - 10) : (filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX") ? 210 : (filament_type[0]=~/.*PET.*/) ? 175 : 170)} ; set extruder temp for bed leveling
M109 T0 R{((filament_notes[0]=~/.*HT_MBL10.*/) ? (first_layer_temperature[0] - 10) : (filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX") ? 210 : (filament_type[0]=~/.*PET.*/) ? 175 : 170)} ; wait for temp
With these two
M104 T0 S{((filament_notes[0]=~/.*HT_MBL10.*/) ? (first_layer_temperature[0] - 10) : (filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX") ? 190 : (filament_type[0]=~/.*PET.*/) ? 175 : 170)} ; set extruder temp for bed leveling
M109 T0 R{((filament_notes[0]=~/.*HT_MBL10.*/) ? (first_layer_temperature[0] - 10) : (filament_type[0] == "PC" or filament_type[0] == "PA") ? (first_layer_temperature[0] - 25) : (filament_type[0] == "FLEX") ? 190 : (filament_type[0]=~/.*PET.*/) ? 175 : 170)} ; wait for tempHope this helps