Scaling it up did the trick. Thanks!

I could simplify by getting rid of the curve but it's a pretty simple model anyway and I'm not having slowdown problems.

Hello!

I just signed up a few days ago. I'm pretty new to SketchUp and 3D software, but have used graphics applications (like Adobe CS) for a while now. I dabble in woodworking, and after getting a miter saw I got the bug to build a few projects SketchUp is perfect for me for some lightweight furniture design.

Not integral to my design, but I wanted to put this in as more of an exercise. I'm trying to make a basic screw to show how a removable section of a saw bench will work. I'm using the follow-me tool to lathe a shape I made out of a plane, perpendicular to a circular path. But it's not making a complete, solid shape. The arc only goes up 2/3 of the way, and there are some sections of the curve missing. Screenshot attached.

I think the shape I made is solid and one piece. It's all on one plane and when I double click it all the segments are selected. I was careful when drawing but might have missed something.

I could fake a screw with simpler geometry but I'd like to learn how to do this the right way. Any help appreciated, thanks!