Material buildup at edges (direction reversals)
MK4S/MMU3, PLA
using default settings, a one layer full bed size print looks really good, except for the edges. You can see the same affect in the single layer stars.
What setting changes are most likely to improve my results?
RE: Material buildup at edges (direction reversals)
Do other slicers do the same thing with the same settings? Posting your settings would help. However, it might not be a slicer issue. Printer settings like speed, jerk, acceleration, temp. It is more pronounced on shorter runs, so i am thinking acceleration and jerk settings in the software. You might want to post those also.
RE: Material buildup at edges (direction reversals)
I only use PrusaSlicer, and I am running the current version 2.9.4. I am running FW 6.2.6 because of known issues with 6.4.0. I am using the Prusa 0.2mm SPEED profile with a 0.4mm nozzle. I have not tweaked any speed, jerk or accel settings.
I played around with the Pressure Advance last night. When I set it very high (0.100), the buildup was significantly improved, but now I see pin holes around the junction of the inner perimiter and the infill.
I had previously run the Pressure Advance Calibration (the one that generates gcode of parallel lines with speed changes) and it looked like 0.055 was the best choice. That is the setting I had used to generate the print in the original picture.
RE:
To me, this looks like overextrusion.
I'd try to calibrate the extrusion multiplier as described in this Prusa help article:
https://help.prusa3d.com/article/extrusion-multiplier-calibration_2257