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Select the inside of a "hole" for use in a sweep

I have a design I'm working on, for a loading coil to be used in a ham radio setup, that consists of two cylinders, one inside the other. For the inner cylinder, I'm using a spiral path and a sweep to create a groove in the cylinder. (I will put copper wire in the groove) and now I'm looking to create an outer cylinder with a matching grove. The idea is that the wire will in effect become the "threads", which will allow me to adjust the length of the coil by screwing in or out. The problem I'm running into is that when I try to do the inner thread I can't select the inside surface with the sweep tool on "solid" mode. In "thin" mode I can select the inner surface, but it does nothing. If I select the inner face and then add the sweep tool, it unselects it.

Can anyone advise on a better way to do this? Pictures follow. Here's a link to the public document.

https://cad.onshape.com/documents/702c6f7a0971d29e943bfc1d/w/724ce2fb98eca23388c84e96/e/6b8b5090f3417452307b2133

Inner part

image.png

Outer part

image.png

Answers

  • Matt_ShieldsMatt_Shields Member, Onshape Employees Posts: 738 EDU

    If you make the merge scope of the sweep both parts, it will remove from both parts.

    image.png
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