Cura help printing top and bottom layers of my prints

[ejweiden 0]

Hi all - I've been using Cura for a few months but this issue where the top and bottom layers of my prints are not printing or even attempted to be printed just recently started occurring.  See the image I've attached for two examples. Its a little hard to see but there are visible gaps between the wall layers where my older prints would be covered with a top layer producing a nice finish. Otherwise than the top and bottom finish, my prints are just fine. I've tried changing the shell settings to many different top and bottom layer thicknesses and number of top and bottom layers but it all seems to look the same. I am using Cura 3.4.1. I tried another slicer program and am experiencing similar issues. What settings should I look at changing? Any advice would be helpful!

 

Thanks

[rowiac 53]

This looks like classic under-extrusion.  What printer model to you have?

 

Make sure your feeder is not slipping and do a cold-pull to clear the hotend if necessary.  Search "underextrusion" for more ideas.