0.6 mm hardened steel nozzle on my Ultimaker 2+ under-extrudes top layers

[gauthier 0]

This is mostly noticeable in spiral mode, but also in regular prints. I switched nozzle to 0.6 mm hardened steel, re-calibrated the build plate. Slicing in Cura 5.1, tried both Marlin and Ultimaker gcode flavors. I put z offset to -0.1 mm, it wouldn't stick otherwise.

 

What are the parameters I should look into?

 

Cubes in spiral mode (wall thickness is correct, maybe even a little fat):

 

In Cura:

 

And a regular model:

[gauthier 0]

This is the same problem as in this thread.

 

The issue does not seem related to filament, it happens with another as well.

 

It surprises me that the lines seem to always be grouped in pairs. It might point to the nozzle itself begin the issue? If there's wiggle room, maybe it drags after on the X direction?

Edited September 1, 2022 by gauthier

[gauthier 0]

I switched back to my old regular 0.4 mm nozzle, but still see similar problems.

 

I made this model to check for wiggle along my X:

 

The result looks good on both sides, so I don't suspect carriage wiggle anymore:

 

3mf of this test model attached (xy-wiggl.3mf)

 

Yet, this rib is solid in my model, but has a gap in my print:

 

 

Here is how it looks like in PrusaSlicer with Arachne (I switched to PrusaSlicer to see if it would perform better in that regard):

 

3mf for that also attached (strip-top.3mf)

 

I am at a loss. What is the problem? I'm starting to think that Arachne might be too optimistic with regard to extrusion consistency, which the classic perimeter algorithm covered with a fat gap line.

 

 

xy-wiggle.3mf strip-top.3mf

Edited September 5, 2022 by gauthier