Help Edge of model not sliced. Shows up transparent gray after slicing.

[jojoreondo73 0]

Aloha,

 

As you can see the bottom edge as well as edge after first angle is not slicing. After the second angle model slices just fine. Help appreciated.

 

Thank you!

 

Jojo

[43915 16]

I've noticed that it looks like that when there's an area that can't be printed for some reason. For example, if there's an edge that's too thin for the printer to be physically able to print (because of it being thinner than the nozzle) Cura will show it like on your picture with the gray area being the actual outline of the model. Not sure if it's the case for you, but if those edges are very thin it could be why.

[GregValiant 1,251]

If something tapers to 0 then that area won't slice.  Once it gets below Layer Height or Line Width (depending on the orientation) then an extrusion won't fit.  You could try using Adaptive Layers or a finer nozzle.  There are limits to FDM and you ran into one.

Here is a wedge that tapers from 2mm down to 0.0mm over it's length of 200mm (0.6°).

The vertical wedge has a large area that won't slice with a .4 nozzle.  (A .2 would do better).

The wedge laying flat is constrained by the .2 layer height and would do better at a lower layer height.  The "steps" along the top surface are obvious.

You can never get this perfect.  It's all Pythagoras's fault.

Edited September 3, 2021 by GregValiant

[gr5 2,172]

@jojoreondo73 - please post your project file (which includes your stl and lots more).  From cura do "file" "save project".