problem with surface quality

[lzautsen 0]

I have this problem when printing with 0.8 nozzles with PLA on a 0.4mm layer height. when setting 'z-seam alignment' to 'user specified' (see attached screenshot) i get this poor quality, seems like the PLA is coming in too late. never had this before but since a few weeks nothing helps to make it better. so question is: what settings do I need to change?

cheers, Leon

[gr5 2,210]

That's underextrusion but only on the end of the part.  Please post your project file.  In cura menu do "file" "save project..." and post that file here.  It will contain your model among many many other things so hopefully it's okay to post your model.

 

Without seeing your settings (all 500) and your model, make sure "retract on layer change" is disabled and consider unchecking both jerk and acceleration control.

 

Unchecking jerk and accel will increase ringing which is visible and some people think is ugly but what you have here is much worse than ringing (in my opinion).  Unchecking jerk and accel control will increase part accuracy as shown with calipers and such but will increase ringing features which are too small to measure with a caliper but are quite visible.