Any advice on improving overhangs?

[cdis6464]

Hi guys,
I'm printing what is essentially a sphere using PLA on a Robo R1+. The bottom part of it, which is in contact with support material, comes out rather bad.

The outermost perimeter of each layer doesn't really adhere to anything at first, and comes out wavy and disjointed from the middle perimeters. The biggest problem, though, is that sometimes parts of the layer start curling up instead of laying down on the support material. This curling slowly spreads in length and accumulates, sometimes to several mm in height. Soon you can hear the extruder literally slamming into these curled up perimeters and making a mess. The highlighted region in the attached photo shows the result of this.

So does anyone with more printing experience than me have advice on how I can improve my overhangs and avoid the perimeters curling up? From what I read, the perimeters curling is almost always because the filament is not cooling fast enough. My fan is already set to 100%, so is my only option to try reducing extruder temperature?

Here are my support material settings:
Support mat. infill 35%
Horz. offset from part 0.3 mm
Vert. offset from part 1 layer (AFAIK if I make this 0, all the problems above will be gone but I'll never be able to get the support material off of the part).
I'm printing at 0.2 mm resolution with 3 perimeter layers with extruder at 210 deg.

Sorry for the long post and thanks for any help with this

[brian442]

They have a good section about this on the S3D print quality guide
https://www.simplify3d.com/support/prin ... e-supports

You could try using dense supports to improve the surface finish on the bottom

[cdis6464]

Thanks, I've gone through that guide before but somehow forgot about dense supports. Will definitely use them the next time I print.

[EvlSmrk]

Were you able to get this sorted out? Did checking the troubleshooting guide help or are you still having issues with the underside layers?