Weak infill issue

[Spilz 0]

Hello,

I have a common issue : the infill of my prints is verry bad.

I know there are different topics on it, in general the solution is to reduce infill speed.

But actually I set the same speed for layers / infill / supports : 40mm/s

Supports and layer are all ok, but infill is verry bad, like this :

In cura, what is the difference infill vs support in GCODE ?

I mean both are one line but support is verry good and infill is bad, why ?

I have this issue after Cura 2.3 if I remember well (now 2.6.2)

thanks for your explainations and for solutions if you have

regards

Spilz