Pronlem Subtracting Bodies

[eliot15]

I'm trying the first tutorial in the 2.5D Solids module and have been able to create the solid displayed below. The grey body in the corner is an extruded, tapered rectangle that I am trying to subtract from the swept body (selected in the image).

First I selected the swept body, then I selected the extruded triangle, then I clicked the subtraction button in the Solid Modeling palette.



I get the following error message: "Boolean resulted in empty body".



Any thoughts???

[cadman]

Originally Posted by eliot15 I'm trying the first tutorial in the 2.5D Solids module and have been able to create the solid displayed below. The grey body in the corner is an extruded, tapered rectangle that I am trying to subtract from the swept body (selected in the image). First I selected the swept body, then I selected the extruded triangle, then I clicked the subtraction button in the Solid Modeling palette. I get the following error message: "Boolean resulted in empty body". Any thoughts???

You have a zero thickness floor in the middle of your swept body. I can't upload a zip file for some reason, but here is what I did. First, clean up the body. If you turn on Edge Selection you'll see some unwanted edges. Select the body then Solids Menu --> Tools --> Simplify, select again and Solids Menu --> Tools --> Remove Unneeded Topology. Now create a new XY Plane at the bottom of the sweep, then move it up a bit like .02". Do a slice, then select the bottom of the body and offset the face back .02".

Select the top, bottom and outer corner faces of the body you are going to subtract and offset them so they go completely past the faces of the swept body. .02" is good enough. Now you can subtract it from the swept body.

[eliot15]

Thanks for the reply. I just finished something I need to run at work tomorrow, and am kinda' spent for today, but I'll tackle your walk-through soon and let you know how it went. It looks kinda' involved.

Sorry to hear about the zip file. Hope its not a problem on my end. I was able to download and open it OK.

Thanks, as always!!

[eliot15]

OK,

I tried simplifying and redoing the tutorial. I have a suspicion about what caused the initial problem, but I can't even get that far again.

Problem: I can't create the sweep.

I've attached 2 files: on called "Works", one called "Doesn't_Work". The first is the GibbsCAM sample file simplified. As far as I can tell, both files are identical, 'cept that ones metric and ones inches. But I can't get the sweep to work in the file I created ("Doesn't_Work").

Here's the sweep in the good file:



Here is the error message I get in the bad file:

.

Thankf for any help.

[eliot15]

I should mention that in the "Doesn't_Work" file, if I select the Circle or the Square, using the profile as the drive curve, the sweep is created.

I just can't get the Rectangle with fillets the sweep.

[eliot15]

I can also sweep the rectangle with fillets if I make the drive curve profile a closed shape. But then why would it work as an open terminated shape with the square and the circle???

[eliot15]

Fiinally!!



Thats what I was looking for....

[eliot15]

For whta its worth....from GibbsCAM technical support:

We have a bug in GibbsCAM and the tutorial is not fully updated. We are going to adjust the tutorial (#26746 - "2.5D Cap" exercise in 2.5 D Tutorial doesn't produce the shape that its describing). As a work around, ask the user to close the profile described in step 21, and everything else should work as described in the tutorial.

It doesn't...or actually it doesn't always...sometimes it does...just a little buggy I guess