I have a very simple print that is driving me nuts because I cannot get it to have a smooth top layer.
It appears the infill is collapsing and causing holes in the top layer.
I have attached the stl file.
I have tried setting the nozzle temp down from 270 to 240 to 245 (I’m printing with ABS)
I have tried adjusting the filament diameter from 2.85 to 2.87 to 2.83 made no difference.
I have tried adjusting the printing speeds for the Infill and top layer currently running at 15mm/s
The only way I was able to get a successful test print was to up the infill to 85% (It was at 40).
Cura 21.02 3.5mm nozzle 40% infill 270C 100C bed. 2.85 Dia filament
Cura 3.04 3.5mm nozzle 40% infill 270C 100C bed. 2.85 Dia filament Irioning enabled.
Cura 21.02 2.87 and 2.83 filament dia Printing speeds decreased.
Cura 3.04 3.5mm nozzle 85% infill 245C 100C bed. 2.85 Dia filament Irioning enabled.
Its a little hard to see in the photo, but the top layer of the plastic drops between the outside perimeter and the inside perimeter of the fat part of the E.
I’ve never had the printer have issues with the top layer before so I’m a little stumped as to what to do. When examining these parts under magnification you can see the extrusion has a zigzag edge, and that it doesn’t appear to touch the edge of the previous extrusion.
I’ll also add the walls are perfect, no missing spots or bulges.
Dimensionally the prints are coming out correct also.
For some reason, the Forum keeps deleting my attached pics.
Earl.stl (70.4 KB)