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No skin under indents

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Posted · No skin under indents

I noticed that when I put an indent on the top (or bottom) of my model the software does not put skin on it. For example, as seen below, I put text on top of a model and indent it a full millimeter. When I slice it with Cura 3.2.1, there is no skin, and the infill can be seen through the text. When I slice it with Slic3r, I have four full layers of skin under the text, as it should be.

Cura3.2.1.png

Slic3r.png

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Posted · No skin under indents

Set the Skin Removal Width setting to 0.5 or less and the skin will be OK when using 4 top skins.

 

There is something weird going on though because if you set top skins to 3, then the skins are OK without using a small value of Skin Removal Width. But setting the skins to 4 makes it bad unless the above setting is changed.

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Posted · No skin under indents

Still no luck. With 4 top layers, 2mm skin expansion and .5 skin removal I still get no skin under the text. 

 

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Posted (edited) · No skin under indents

I just went with defaults on 0.2mm and got this:

Starts to lay down the CT5

BottomofLayers.thumb.jpg.8b710b223e3403f8103aec6b2f2197df.jpg

 

Gets to a spot 5 layers later that starts the other top surface

5ad85b3be9f08_BottomofLayers5Layers-evensurface.thumb.jpg.2a94c6242f4c29d41945524a34615679.jpg

 

And then prints around the debossed letters until finished.

TopLayers.thumb.jpg.289c7bea5f9366ed0fe21cf1f6558de5.jpg

 

Am I missing something here?

 

Below is the project file I created. 5 brownie points to whomever gets the pun.

 

UM3E_ct-alpha-5.curaproject.3mf

 

Edit: I just noticed that you are slicing for a hictop and not any UM printer. This means that there is a variance on what the slicer puts out. I think @smartavionics will be much better at sussing this out. Especially since he is a coder and may find wht the part in the hictop profile is missing to create that issue.

Edited by kmanstudios

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Posted · No skin under indents

I probably should have mentioned that from the get go. I use a Hictop (prusa clone). And the software is on a MacBook Pro.

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Posted · No skin under indents

Actually, further investigation shows that the real problem here is the large value of Minimum Infill Area. Reduce that and the skin shrink/expand settings are OK as they were. I was the original creator of the Min Infill Area setting and it is now pretty much redundant because you can shrink/expand the skins which you could not back then. Also, looking at the Cura code which has been reworked by someone else since I worked on it, it doesn't appear that the Min Infill Area setting does what I would expect any more. I recommend setting it to 0 now.

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