Simplify3D User Forum

I'm searching for an option of only activating layer cooling for the perimeter lines, so that the infill is not cooled and therefore should maintain best possible layer adhesion.

Is this possible in S3D?

Don't think so.

You could use gcode post-processing to filter the ; infill etc comments to add fan control gcode. The comment lines look like this:

; inner perimeter
; outer perimeter
; infill

You lose most of your ability to control the fan through the normal UI though, as your gcode will compete with fan control from S3D.

Like jmunkki said, you should be able to do this with the automated scripting in S3D. Just add the following to your post-processing script

{REPLACE "; inner perimeter" "M106 S255\n; inner perimeter"}
{REPLACE "; outer perimeter" "M106 S255\n; outer perimeter"}
{REPLACE "; infill" "M106 S0\n; infill"}

That should turn the fan on for your perimeters, but then off for the infill which is printed right after the perimeters.

If you're new to these commands, here's a few good links to help:
https://www.simplify3d.com/support/arti ... -tutorial/
viewtopic.php?f=8&t=1959

Thanx! will try that.