[Why is Cura generating partial top layers?]

First off, you model is AWESOME. Yeah, everything is flat, straight, level, etc. very

...

It might make bed adhesion a little more difficult, but your top layers will be flat.

 

Thanks man! On both accounts, as that was actually the issue it seems. Had my initial layers set to 0.3 mm.

Set it to 0.25 and fixed my surfaces!

Is this a known issue then? Pretty annoying something like this when you really have no clue where to look for the cause.

[Why is Cura generating partial top layers?]

I took a look. Here is an image of three different slices using the Lines, Concentric and Zig-Zag. I could not reproduce the image you provided. But, it is laying flat. You can check that by taking your layers to the bottom and see if it is indeed sliced on the bottom. It was in my view. I did try different rez sizes (Draft, Normal, Fast) and it did not change and moved it around the plate. I do not think it is an issue. It just looks like the way the graphics are being drawn or something. What version of Cura are you using?

 

Thanks for checking Kman, but it's not just graphical; I only noticed Cura was doing it when the actual prints showed half made top layers:

Bottom layer looks pretty flat in the slicer:

Using latest Cura 2.5

[Why is Cura generating partial top layers?]

Check the X-Ray view for any RED areas, they would indicate issues with the model that can confuse Cura when slicing it.

I've seen this happen when the layer is not perfectly flat and parallel to the build plate. Even a difference of .1mm in height can cause the slicer to print that 'bump'.  Any way you could post the STL, or original model for examination?

The model itself is perfectly proportioned, pretty sure of that barring any outragous STL conversion errors on SW's side. Here are all the views:

(notice the funky pattern on the top layer now)

And as far as I can tell the bottom of the model is perfectly aligned to the bed:

If you want to take a look; feel free to check out the STL/SW models:

DriveMotorHousing.zip

So far it hasn't been messing with any actual functionality, but I foresee some potential problems later on in my project on moving parts if it keeps adding pronounced ridges...

Thanks!

[Why is Cura generating partial top layers?]

Hi, I'm having this weird issue where Cura keeps generating a partial top layer:

It's almost like I accidentally tilted the model ever so slightly, but the bottom layer is perfectly flush with the bed. Also, moving it around makes the partial top layer generate in all sorts of inconsistent shapes and sizes, even on opposing ends of a surface!

All dimensions are exactly defined and exported from SW, so I'm kindda puzzled at why it does this?