Infilled areas

Hi,

I am having troubles printing some Mendel part. My problem is in the printed parts there are infilled areas, I tried lots of Slic3r setting, but I can't solve this problem, what could cause this? I've got an other problem, I
printed an z-motor holder, and I can see throught that. Please help solve this problem. Thanks

Slic3r settings: Layer height = 0.2mm
Fill density = 0.4
Fill pattern = honeycomb
Extruder temperature = 200C
other setting are default

I'm using black PLA

You need to run a calibration with slic3r see this for help [github.com]

Looks like you have way to little material flow. Set it here [manual.slic3r.org] under Extrusion multiplier.

Thank's your help I will try it.