Surface border Problem Help


#1

Hello, I’ve been using SketchUp for about a year to design models for 3d printer.
I did not have any problem until yesterday when Surface Border problem started.

Even when I draw just a rectangle, when i use solid inspecter2, it keeps on saying surface border thingy.
I first ignored only to find out that objects with surface border problem do not get exported as stl file.

I never had this problem but now all of the sudden I can’t make any model at all. Not even a circle, line, rectangle, etc. Everything I draw gets surface border problem.
(I have checked every single one of them and none had open surface)

How do I fix this problem? Im using SketchUp Make 2017 on windows 10 64 bit
thanks


#2

You are describing 2d geometry - this can never be solid !
Group the rectangle and select the group, Entity Info will not say it’s a solid, and SolidInspector2 will report a surface border issue.
Edit the group and PushPull the rectangle into a 3d form - then exit the edit and it’ll now report in Entity Info as ‘Solid’ and also be OK in SolidInspector2.

A manifold solid can only contain faces and edges and every edge must support exactly two faces, no more, no fewer.
A 2d rectangle has 4 edges and each one of those upports only 1 face [==non-solid].
An extruded 3d rectangle has 12 edges and each one of those supports 2 faces [==a solid].


#3

I used UV polygen extension to create 2d Quadratic function graph, and then connect the ends to make a surface. Then I would draw a circle above it and use ‘follow me’ to make nose cone shape. It used to work and not it keeps on saying surface borders.

and also before i had this problem, even 2d geometries didn’t get surface border problems.

I dont know why all the sudden sketch up started acting unusual. (i sometimes got surface border problem b4 on 3d shapes too…)


#4

How large are your objects? If they are small or have a lot of small edges, you may be getting surface borders where holes form because SketchUp erased an edge that is too small. Solid inspector 2 will highlight where it found the borders, and this will show you if small edges are the issue.