Region not separating

justin_kchao

Hi,

I've been trying to make an Onshape model of a cookie cutter to be 3D printed, and for some reason when I offset the border (to form the handle), the original border's region does not disconnect from the outside border.

How do I separate the two borders?

(The red line is what it is currently, while the blue and green lines represent the different regions that I want to be separated.)


Document link: https://cad.onshape.com/documents/e8c29d7651e222f098477d00/w/9766d75d02d43351c67edcb1/e/b236b7c201e0c36c685b000c?renderMode=0&uiState=628d95e52e97426b3e981fe0

eric_pesty

Looks like there are a couple of gaps in the line.
One way to find gaps is to, use the "create selection" with the "loop/chain connected edges":



You can also use the Open sketch point custom feature to find these:
https://cad.onshape.com/documents/4fa113c6594cd037bfa214da/v/e5f9020158b188b1ec33530d/e/30010656480b133cd4dcad6d

S1mon

A few recommendations:

• Use as few points as you can in the curves. Keeping things simple will make any downstream features that much more robust and easy to manage
• Solving a sketch with a ton of arcs tangent to splines can make things more complex - consider adding these as fillets to solid or surface features
• If the curves want to be true offsets from each other, consider drawing a simplified version of the outside shape without the feet, hands and creases. Then extruded that as surface, and offset that twice. Offsetting surfaces are often more robust than offsetting complex series of splines. Then create sketches which use the edges of the offset curves and add the details in those.

Here's an example of starting to redraw the curves to be much more simple:

eric_pesty

Looks like there are a couple of gaps in the line.
One way to find gaps is to, use the "create selection" with the "loop/chain connected edges":



You can also use the Open sketch point custom feature to find these:
https://cad.onshape.com/documents/4fa113c6594cd037bfa214da/v/e5f9020158b188b1ec33530d/e/30010656480b133cd4dcad6d

S1mon

A few recommendations:

• Use as few points as you can in the curves. Keeping things simple will make any downstream features that much more robust and easy to manage
• Solving a sketch with a ton of arcs tangent to splines can make things more complex - consider adding these as fillets to solid or surface features
• If the curves want to be true offsets from each other, consider drawing a simplified version of the outside shape without the feet, hands and creases. Then extruded that as surface, and offset that twice. Offsetting surfaces are often more robust than offsetting complex series of splines. Then create sketches which use the edges of the offset curves and add the details in those.

Here's an example of starting to redraw the curves to be much more simple: