<p>Cura is slicing my object (a gear with text) with a partial top layer, and I believe it has to do with layer height and rounding issues. I have been able to solve this at specific heights 10-14mm using a layer height of 0.25 mm, however other heights will cause this issue to arise again. There must be a solution to this that doesn't require the user to constantly be adjusting layer height and object height in order to resolve what I perceive to be a rounding issue. </p>

<p>Here is the model:
<a href="https://filebin.ca/3f2g2s0dklzR/hackEly_v1.0_joined_text_2.stl" rel="nofollow noreferrer">https://filebin.ca/3f2g2s0dklzR/hackEly_v1.0_joined_text_2.stl</a></p>

<p>Here are my settings:
<a href="https://i.stack.imgur.com/EBRnV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EBRnV.png" alt="Settings 1"></a>
<a href="https://i.stack.imgur.com/7oZZY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7oZZY.png" alt="Settings 2"></a></p>

<p>Here is the model at a height of 10 mm:
Note the diagonal line, this is the line between two layers.
<a href="https://i.stack.imgur.com/hz3gz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hz3gz.png" alt="Object 10mm"></a></p>

<p>Here is the model at a height of 13 mm:
Note the diagonal line again, and how it is farther to the right than the 10mm height view.
<a href="https://i.stack.imgur.com/8SLTX.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8SLTX.jpg" alt="enter image description here"></a></p>

<p>I don't believe that this is not a non-manifold issue. I have also tested this using a gear without text.</p>

<p>Like I mentioned, I can get rid of that layer division at certain layer heights and object heights (e.g. 0.25mm layer height), but I would like to find out how to get rid of this issue <em>regardless of object/layer height</em>. Thank you for your help.</p>

[{'answer_id': 4808, 'author': 'Athanasios Karagiannis', 'author_id': 8725, 'author_profile': 'https://3dprinting.stackexchange.com/users/8725', 'pm_score': 3, 'selected': True, 'text': '<p>Your model isn\'t perfect. I took it into Windows 10 3D Builder for simplicity. I kept clicking the "Mirror" function and noticed as it basically flipped there is some slight movement. I measured some points from bottom to top and noticed some differences. </p>\n\n<p>Try to take your model into some software to fix/flatten it. Or recreate it making sure its perfectly flat on both sides. It is definitely not your Cura software.</p>\n'}, {'answer_id': 4810, 'author': 'fred_dot_u', 'author_id': 854, 'author_profile': 'https://3dprinting.stackexchange.com/users/854', 'pm_score': 1, 'selected': False, 'text': '<p>Even though you\'ve selected an answer, here\'s another viewpoint. Ignoring the brim that I\'ve added by default via my slicer, you can see the first few layers are not complete. This indicates a model that\'s a fraction of a degree off-plane. </p>\n\n<p><a href="https://i.stack.imgur.com/2VRCT.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2VRCT.jpg" alt="slanted model image"></a></p>\n\n<p>Any number of methods can be used to correct this. Meshmixer has a great "align" function in the edit menu which will drop it on the bed. My slicer, S3D will work in that respect with "Place surface on bed" or some such terms.</p>\n\n<p>The image below represents the result of using Align in Meshmixer, Inspector (repair all) and export. The STL file imported to S3D presented exactly the same image on the first layer as in the image above. When I used "Place surface on bed and selected the horizontal cross-member as the reference surface, the first layer result is this:</p>\n\n<p><a href="https://i.stack.imgur.com/goSvf.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/goSvf.png" alt="first layer after repair"></a></p>\n\n<p>The slicer completed the imaging with this result, clearly with no diagonal artifacts:</p>\n\n<p><a href="https://i.stack.imgur.com/kAlU3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kAlU3.png" alt="last layer"></a></p>\n'}]
['https://3dprinting.stackexchange.com/questions/4807', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/8836/']