What does Non-Manifold mean?

[Vince B]

Just like the topic says....And what makes a solid non-manifold, or manifold for that matter? How do you need to change the geometry to fix this error?

 

Thanks for any help you can give.

 

Vince

[Guest]

Generally if you are going to do a cut on some sort of solid geometry, if there a piece of leftover solid, that will create 2 separate solids, you get this error. Usually you have to adjust your cutting geometry to make sure the leftover section is cleared away on the cut

[Vince B]

The error you describe results in a disjoint body. It's a different error. That one is second nature to me by now.

Is it a different case of the same problem? It only seems to happen when performing boolean operations. Of course a cut through a solid is a boolean operation but it is different somehow....

[Thad]

I get the "non-manifold solid" error when I do what John describes.

 

Thad

[Jim Martin CNC Software]

A “non-manifold solid” is an inside-out solid. One where one or more face normals point into the solid rather then out of the solid.

[Vince B]

Thad,

I did a quick test solid rectangle then completly cut through it with another rectangle which would have resulted in two distinct solids and got the "disjoint" error. But I think I have gotten both errors from that in the past. Again I guess it's a similar case of the same problem if that makes any sense...I was attempting a boolean common operation when I got the non-manifold error this time.

 

Jim,

Thank you for the definition. Since I'm almost entirely self taught on Master Cam there are probably some large holes in my personal knowledge base. I had never come across that tid-bit. Is there a list of error descriptions or definitions somewhere? I've never found one in the manuals or online help. Might be a good addition to future versions or maybe a data base on the web page?

Thanks for the help guys.

 

Vince

[Chris Parish]

Vince:

 

Let's get together and go through some Mastercam.. then maybe catch a Bills game

[Columbo™]

quote:

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I get the "non-manifold solid" error when I do what John describes

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same here