Massive Under Extrusion in Corners - Mini with IS
I have seen a couple other posts about this, but no answers/solutions.
I get massive under extrusion just on the corners of my prints when using input shaper. This occurs with PLA and PETG (I tested both on the same part). I have seen other threads about underextrusion at seams etc, but this is much more prominent than that issue (and potential bowden tube related issues).
Does anyone know how to solve this problem? Is it a slicer issue or a printer issue?
Best Answer by Colton Campbell:
I did some tinkering with the pressure advance settings and that pretty much solved the above issue with input shaper. I had to lower the "S" value from about 0.25 to about 0.11.
Now I just need to fix a final issue with the seam having small gaps in input shaper mode.
RE: Massive Under Extrusion in Corners - Mini with IS
first look at https://forum.prusa3d.com/forum/hardware-firmware-and-software-help/how-often-to-replace-various-parts-on-the-mini-a-proposed-regular-part-replacement-schedule/ and do general maintenance.
If that does not help please provide more details about firmware, prusa slicer version, profiles and example model - there's just too many factors that thighs can go wrong.
See my GitHub and printables.com for some 3d stuff that you may like.
RE: Massive Under Extrusion in Corners - Mini with IS
I did some tinkering with the pressure advance settings and that pretty much solved the above issue with input shaper. I had to lower the "S" value from about 0.25 to about 0.11.
Now I just need to fix a final issue with the seam having small gaps in input shaper mode.
RE: Massive Under Extrusion in Corners - Mini with IS
Now I just need to fix a final issue with the seam having small gaps in input shaper mode.
Any progress on solving the issue with the gaps at seams?
RE:
I have just aquired MINI from 2020, it was dusty, and in rough shape, I restored it to its prime, updated firmwares for few hours. Cleaned, relubed, squared, calibrated. And, I started working.
Solution for That Masive Under Extrusion and seam gap:
As OP stated, K factor needs tuning if You are using new Input Shaper speeds. PLA is good arround K 0.11 , PETG arround K 0.24. Tune more for speciffic filaments!
*** As for Seam gap, there is setting in Prusaslicer called: ,,Seam gap distance''. --> Lower it to 10% test, and afterwards tune it more if necessary .
(Some filaments like ,,Wipe while retracting'' with ,,Retract Amount before wipe'' 70-90%.)
Sorry for the late answer.
Try these settings, and please give me a feedback!
Cheers!
RE: Massive Under Extrusion in Corners - Mini with IS
K factor depends not only on the filament but also on the heatbreak/nozzles, for example my PETG works great at 0.55 (default is 0.35), so everyone needs to tune it on their own, it's not hard and takes about 15min (two print runs, one with wide range of the values, and the another with narrow range to fine tune it)
See my GitHub and printables.com for some 3d stuff that you may like.
RE: Massive Under Extrusion in Corners - Mini with IS
I'm talking about stock Prusa Mini / + here with Input shaping. But I do agree with You. It needs to be tuned, but the OP has that under control. So I posted rest of the reply as a solution what he was lacking after fixing his first trouble. --> ,,Seam gap distance''
RE:
Now I just need to fix a final issue with the seam having small gaps in input shaper mode.
Any progress on solving the issue with the gaps at seams?
Yes, some minor adjustments in the slicer profile and all is good now. Pressure advance value was the main problem, slicer settings tweak fixed the last 5% aesthetic.