Ignoring support in cura

[shaihem 0]

Hello everyone,

 

Is there anyway that I can tell cura to ignore printing any part of a model that needs support?

 

Let say I have hollow cube, the roof will need support, so by doing what I said, the cube will be printed except the roof.

 

Any ideas?

 

Best

[ahoeben 2,047]

4 minutes ago, shaihem said:

Let say I have hollow cube, the roof will need support, so by doing what I said, the cube will be printed except the roof.

 

This can be achieved by setting the number of Top Layers to 0, but that is not a generic way of "not printing" anything that overhangs more than the overhang angle.

[shaihem 0]

10 minutes ago, ahoeben said:

 

This can be achieved by setting the number of Top Layers to 0, but that is not a generic way of "not printing" anything that overhangs more than the overhang angle.

 

Very well, but I need something generic if possible

[ahoeben 2,047]

It is not something Cura supports in a generic way. Cura is based on the assumption that models are "watertight". Even a cup or your cube without a top is watertight in the real world because it has an inner and outer wall.

 

With any physical object, if you make a cross-section, and draw a straight line over that cross-section, you will always cross an even number of "transitions between the object and the space around it" (ie: walls). A single "wall" would be infinitely thin and that can not exist in reality (though it is easy to create digitally).

 

Just not printing specific faces makes the object not watertight, which is not something Cura "wants to" do.