How to select area of face between two paths? Speaker Enclosure build.

eric_fisher438

Greetings, and thanks for looking at my question. I'm working on a two-way speaker enclosure, and I can't figure out how to select an area to Extrude (Remove) for a rebate. Document Link:

https://cad.onshape.com/documents/48e1f43d8524a127459bab7a/w/aac4f43d66c27b93319290bd/e/8e2d6691586c6701e122efdb 

The face on Plane 1 has two openings for the speakers. The bottom opening was created by making a sketch with two circles, and then extruding the outer circle less than the thickness of the material so the speaker will be flush with the face of the box.

I want to do the same with the top opening, but for some reason Onshape will only let me extrude (remove) the inner portion (sketch 10), but it won't let me extrude (remove) the outer portion (sketch 9). I'm going crazy trying to figure out how to make a rebate in the top opening like I did with the circles on the bottom opening. The top opening was made using two SVG files that someone else made to match the shape of the horn that will go in that cutout. I converted the SVG files to DXF files (inner and outer) so I could use them in a sketch. Now for some reason the DXF files open in a ARES Kudo tab with I didn't install or setup, and I have no idea how or what I'm supposed to do with ARES Kudo. I'm just trying to use the outline of the two SVG files to make an inner and outer sketch so I can thin that face so the horn will be flush with the face of the box when installed.

Thanks for any help you can provide.

-Eric

robert_scott_jr_

Hello Eric. If you compare your sketches, sketch 9 is unique in that it is not filled with grey. This indicates that the sketch is not fully enclosed; it has a gap or gaps on it's perimeter. If it is not fully enclosed it cannot be extruded. Zoom in on the area where the upper horizontal line and the curves are meant to connect. They do not. Correcting that will solve the problem. - Scotty

Matt_Shields

Sketch 9 had some gaps.  I'd make a new sketch.  Use the Use tool and the Offset tool to create the profiles you need.

robert_scott_jr_

Hello Eric. If you compare your sketches, sketch 9 is unique in that it is not filled with grey. This indicates that the sketch is not fully enclosed; it has a gap or gaps on it's perimeter. If it is not fully enclosed it cannot be extruded. Zoom in on the area where the upper horizontal line and the curves are meant to connect. They do not. Correcting that will solve the problem. - Scotty

Matt_Shields

Sketch 9 had some gaps.  I'd make a new sketch.  Use the Use tool and the Offset tool to create the profiles you need.

eric_fisher438

Thank you both for the help! I feel like a real dummy for not looking closer at the path. I've only been learning OnShape for a couple months and I'm still not real confident with using SVG or DXF files in my models. Thanks again!