No skin under indents

[ElClipo 1]

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.

[ElClipo 1]

Am I the only one having this problem? Am I missing somebody setting that handles this?

[burtoogle 513]

Hi, could you please post the model for us to look at? Thanks.

[ElClipo 1]

Here's the STL for it.

ct5.stl

[burtoogle 513]

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.

[ElClipo 1]

Interesting. I will play with those settings tonight. Thanks for the response.

[burtoogle 513]

 

This is using a skin removal width of 0.5 and a skin expand width of 2.

 

[ElClipo 1]

Outstanding!

[ElClipo 1]

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

 

[burtoogle 513]

Could you please post a 3mf file so that I can see what settings you are using.

[kmanstudios 1,120]

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

Starts to lay down the CT5

 

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

 

And then prints around the debossed letters until finished.

 

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 April 19, 2018 by kmanstudios

[ElClipo 1]

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

[ElClipo 1]

i hope this is the file you need. 

H_CT5.3mf

[burtoogle 513]

You need to reduce to skin removal width to 0.1 or less.

[burtoogle 513]

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.

[ElClipo 1]

Sounds good. I’ll try that tonight.