I'm getting this error when trying to thicken my surface. How do I fix it?
Are your sketches fully defined?
Do you want a point at the top of your helmet?
Yes all sketches are fully defined.
I want a smooth top, not a point.
The problem as J. Mather stated is the point on the top of the helmet. To analyze this, us the Tools -> Evaluate -> Check feature and look for the minimum radius of curvature. This is the window shown below.
The second helpful tool is the Curvature tool on the evaluation tab. This highlights the part with a color that corresponds to the radius of curvature. As you see, the black spot at the top is a convergence with a very small radius.
The best solution is to try and make all direction vectors tangent at your convergence point at the top. This way, your part will have a better chance of thickening.
I fit some splines to your direction sketches and made them tangent at the top. This still isn't great but the radius of curvature is up to 0.012 and Thicken worked inward and outward. I tested thicknesses up to 0.125" and nothing broke.
I hope that helps. Good luck!
This is what I get when I check it. What am I missing?
2.4E-6 inches is a very very small radius. When attempting to offset a surface with a radius, I suspect that solidworks has trouble finding the normal vector on such small surfaces in which to aid with the direction of the offset.
My recommendation would be to look at creating a surface revolve or something at the crown of the helmet that you can better control the radius. Take a look at the screenshot below. The dark blue section is just a revolve of an arc with a 2.5ish" radius.
What did you use as an axis for the surface revolve?
If you use a circle sketched on the Top plane - you could trim away a hole in the top of the helmet.
If you don't want the hole, you could patch it with a Filled Surface, Knit it together and then Thicken.
I tried a circle. That works better.
Edit: the circle will thicken, but it doesn't work well as a helmet. It just looks like I put a bowl on top of the guy's head. I need a helmet that's more head shaped.
Edit: I got it to work by putting a hole on top
I just sketched on the right plane and drew a vertical construction line to use as the axis of rotation. I like J. Mather's suggestion to cut a hole in the top and patch it with a filled surface indicating tangent edges.
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