9 Replies Latest reply on Jan 15, 2013 10:56 AM by Christopher Figgatt

# Filling a Surface and Cutting into it?

Hello,

I am makinga a violin scroll using surfaces. At this point, I have it almost completed, but I need to make it a solid body. Thicken will not work because of the nature of the shape; thickening causes intersecting geometry. I tried to use the filled surface tool, but that does not seem to actually make it solid. In addition, the reason this needs to be solid is that I need to cut four holes into the side of the model. Apparently you can't do an extruded cut through a surface. Is there a different way to cut holes into a surface? Or, rather, I don't know how it works. I'm a bit new to surfacing.

• ###### Re: Filling a Surface and Cutting into it?

Hi Darcy,

there is a significant problem with Loft5 that is not going to allow you to go further.  You are going to have to break up that surface into two.

• ###### Re: Filling a Surface and Cutting into it?

Hi Mark,

Perhaps this would work better? It still won't let me trim.Where else should I split the surface?

• ###### Re: Filling a Surface and Cutting into it?

Darcy,

SolidWorks Surfaces have their own vocabulary. Use the Trim tool to cut holes in a surface.

Jerry S.

• ###### Re: Filling a Surface and Cutting into it?

How do I do that though? Do I create a sketch with the holes where I need them, project them onto the surface, and then trim?

• ###### Re: Filling a Surface and Cutting into it?

Surfaces can be trimmed with other surfaces.

• ###### Re: Filling a Surface and Cutting into it?

Darcy,

Right. Or you can use Kelvin's or Mark's methods as well.

Jerry S.

• ###### Re: Filling a Surface and Cutting into it?

Darcy, to answer your question about creating holes.  One method that I like is to create a sketch for the hole sizes, use the Surface Extrude command to extrude cylinders that project to the depth of the hole that you want.  From here I'll use the Surface Trim tool to remove the portions that I don't need and then use Surface Plane to create a hole bottom if needed.  One note here, if you use this method, make sure that you "over build" the cylinders so that they extend beyond the surfaces that will be used for trimming later.  You'll have fewer problems with surfaces when you "over build" and then trim away what's not needed.

• ###### Re: Filling a Surface and Cutting into it?

Here's another way to make a hole in a surface (sketch, split line on surface, delete face).

See attached flash video.

• ###### Re: Filling a Surface and Cutting into it?

Darcy,
There are a lot of problems with the way you create 3-D sketches. Begining with Loft5, the way you created those 3-D sketches will leave you with a lot of open gap and extra surfaces. Just like Mark said, this will cause you a lot of trouble later on and may be stopping you from going further. I suggest you use convert to entities and trim when making your 3-D sketches.