Need help with this gaps in top layer

[3dnerd 6]

Hi,

I use Cura 4.8.0 on my Windows 10 machine. I have a small part to print. I used the draft settings, changed 'wall line count' from 2 to 3, changed infill from 20% to 40%.
If I slice I get a small gaps in the top layer of the lower part, see image:

If I set wall count back to 2 then the gap disappears:

 

How to get rid of the gap if 'wall line count' is set to 3?

The *.3mf file is attached.

Thanks for any help...

CuraSmallGapInTopLayer.3mf

[GregValiant 1,330]

This might actually be a bug.  This is the second model with this problem in a week.

If you change the "Inner Wall Line Width" to .3 the gap goes away.

It's such a small part, why not change the infill density to 100%?  That makes the gap go away as well.

 

This problem seems like it comes up when there is a small dimensional difference between the top feature and the base feature.  Cura typically puts the walls of the top feature on a solid base but in this case (and the other) this doesn't happen unless other settings are fudged.

 

EDIT:  Here is the other instance. "Gap in Wall"

 

 

Edited January 17, 2021 by GregValiant

[3dnerd 6]

Hi Greg,

orthographic does not help unfortunately.
Pan and rotate are smooth, but scrolling using the wheel just provides rough steps.
Is there any keyboard shortcut to zoom without the mouse wheel?

 

[GregValiant 1,330]

Plus and Minus keys either on the numeric keypad or the regular keyboard.  They still want to jump though.  The mouse wheel "jump resolution" might be a result of the way scrolling is set in your Op System Mouse controls.