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How to get Midsurface for part?

ncmbhckplncmbhckpl Member Posts: 5
I want to get Middle surface (horizontal) for this part, but i couldnt. 

I need help emergency.
Thank u.


  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 3,112
    Do you mean the mid-surface of the entire part (for simulation)? Or the mid-plane (use midplane option in Plane feature)?
  • mahirmahir Member, Developers Posts: 993 ✭✭✭✭
    Midplane option of the plane feature will work fine if you just want to get a plane in between two planar surfaces. If you want a middle surface for the entire part you'll need to use Offset with a value equal to half the thickness.
  • ncmbhckplncmbhckpl Member Posts: 5
    Yes i mean mid-surface of the entire part for shell meshing, i tried Offset all part but left and right ears of part was drawn on different planes. So i could not.
  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 3,112
    If it’s all one part you should be able to use offset surface. Can you share the URL?
  • mahirmahir Member, Developers Posts: 993 ✭✭✭✭
    This part looks like it's sheet metal, but it's not really modeled like sheet metal, which makes shell meshing a bit sketchy. The material thickness varies anywhere from .77mm to 4.2mm. So if you wanted a true midsurface, you'd have to stitch together multiple Offset surfaces. 
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