TPU settings that work with MK4
For those of you experimenting with TPU, I have used this method and these settings for multiple perfect prints:
First, loosen the two idler screws approx. 1.5 turns. A good method is to loosen the idler screws a little, load the TPU like any other filament, and loosen a bit more during the purging phase if the filament is not coming out of the nozzle. Don't forget to tighten back up when printing with other filaments.
Second, I used the following settings in PrusaSlicer with the satin sheet and have peeled it off without any residue or difficulty (I compiled these from different online posts):
- Infill
- Top fill pattern: Hilbert Curve
- Bottom fill pattern: Hilbert Curve
- Speed
- Speed for print moves
- Perimeters: 20
- Small perimeters: 20
- External perimeters: 20
- Infill: 15
- Solid infill: 15
- Top solid infill: 15
- Support material: 15
- Gap fill: 15
- Speed for non-print moves
- Travel: 150
- Speed for print moves
I left all other settings as the defaults for Generic Flex. It seems the The Hilbert curve on the bottom makes it easier to pull the print off the plate. It probably isn't necessary on the top. I hope this helps some of you get great TPU prints!
RE: TPU settings that work with MK4
These settings worked like a charm for me. Thanks for sharing!
RE:
@doctorg These settings worked for me too! Thanks!!
I even got a small hangover ridge to print properly! 😉 I am using "OVERTURE TPU Filament 1.75mm Flexible Roll, 95A Soft 3D Printer Filament" with a nozzle temp of 235C and bed temp of 65C. I used the textured bed and though it took a bit of careful tugging, the piece came off without a problem.
Thank you!
RE: TPU settings that work with MK4
Thanks for sharing your settings.
Loving the learning curve!
RE: TPU settings that work with MK4
This worked great on my MK4S with MMU! Thanks!
For those of you looking to do this with a similar setup, you have to do something slightly different since Generic FLEX is not available for the MMU. I created a dummy MK4S printer (without the MMU), and took screenshots of each of the settings tabs. Then I went back to the MMU printer and created a Generic PLA, but changed everything to match the flex. Now, in order to get the ramming settings correct, I found it easiest to navigate to the folder where the Prusa program files, specifically the .ini files for your printers, filaments, etc., and copy the ramming settings from the "Filament=*common*" because that's what is inherited by "Filament=*FLEX*."
In addition to your filament settings, you'll have to create custom printer settings for the layer selection, because that's where the speeds are changed (not the filament settings). I ended up copying the 0.2 SPEED settings and made the above changes, as applicable, and then saved it as "0.2 SPEED TPU."
Hopefully that makes sense. I can try to copy my .ini file settings for the user profile filament I created, if that would help someone.