Rhino cannot make simple desktop shape with radius edges and corners

[kenlevi80]

Why can’t Rhino make a simple desktop with Radius edges and corners? What am I doing wrong?

I need this shape

With this edge

Create a polysurface and radius the “Corners” for the shape. No problem. When I filletedge I get this mess:

Okay Let’s try sweep1 the shape! I get this problem:

This is crazy, right? Any help is greatly appreciated.

Thank you

[JimCarruthers]

The last image clearly shows that you’re trying to apply a bigger fillet over top of a smaller one. That’s going to fail every time on any software.

All I had to do here to make this work was leave all the edges sharp, FilletEdge worked fine.

[kenlevi80]

66" x 22" x 3/4"

Thanks
K

[kenlevi80]

How do I leave the edges sharp?

Hope I am not being dense!

thanks

[JimCarruthers]

I mean don’t put tiny fillets on your base curves! You need to fillet your object in order from biggest to smallest fillets(FilletEdge handled this case fine in one step but that’s how filleting works,) indeed it also applies to “areas of similar curvature” when you’re working on a totally freeform shape.

[kenlevi80]

So here is my 1/4"

Now apply the 1/8"

I see that this works!

thank you!