Page 1 of 1

how do you substract one part from another

Posted: Tue Nov 07, 2017 7:12 pm
by Johan Jonker
Maybe I am not used to the TopSolid userinterface yet (I am a new user).
I have to define a complex object and thought to build it from several parts.
Some parts have to be added to the base part while others have to be subtracted from it.
So I prepares some parts. But I don't know how to subtract one part from another.
How does it have to be done?

Re: how do you substract one part from another

Posted: Wed Nov 08, 2017 3:23 am
by Brian
Hi Johan:

The Boolean functions are found under the Shape tab....Shape/Boolean (the Union, Subtraction, and Intersection options are found in the main dialog window).

Cheers, Brian

Re: how do you substract one part from another

Posted: Wed Nov 08, 2017 7:55 am
by Johan Jonker
Hello Brian,
Thanks for reacting.
I know where to find it but I don't know how to use is. I think it is clumpsy. :oops:

I want to do this part c = part A - part B
1) I select part A
2) then select the suctract dialog
3) and then?

I see a tools field that is empty. Do I have to get part B in there?

Re: how do you substract one part from another

Posted: Wed Nov 08, 2017 7:48 pm
by Brian
Hi Johan:

Yes, you will have to indicate which solid is the tool and which is your part.

Cheers, Brian

Re: how do you substract one part from another

Posted: Wed Nov 08, 2017 10:33 pm
by Johan Jonker
And how do I indicate that?
notool.jpg
I don't see that option.
notool2.jpg

Re: how do you substract one part from another

Posted: Thu Nov 09, 2017 12:12 am
by Brian
Hi Johan:

Ah, now I see your problem. I *think* (but I'm not certain....) you will want to make an assembly document containing the part(s) you want to act upon, and then perform your Boolean operations in the assembly document. I believe that you can also trim one part with another inside an assembly document. I had initially thought that you were working with multiple solid bodies contained in one part file....

Thanks, Brian

Re: how do you substract one part from another

Posted: Sun Nov 12, 2017 1:24 pm
by Johan Jonker
Hi Brian
I tried that but did not succeed in anything else than just adding parts together.

Re: how do you substract one part from another

Posted: Mon Nov 13, 2017 1:10 am
by Brian
Hi Johan:

Once you have created the assembly containing the parts you wish to modify, you need to make one (or more) of your parts "modifiable" (Modeling/Local Shapes/Make Locally Modifiable). After that you can use the Boolean operators (Modeling/Local Shapes/Boolean) to modify your part(s) within the assembly.

Attached is a simple example file for you...enjoy. Let me know if this does the trick, OK?
Boolean Ops in ass'y.zip
(104.25 KiB) Downloaded 183 times
Cheers, Brian

Re: how do you substract one part from another

Posted: Thu Nov 16, 2017 3:10 am
by Bill
Johan Jonker wrote:And how do I indicate that?
notool.jpg
I don't see that option.
notool2.jpg
Hi
I see the problem. You designed each shape as separate parts. So to use them as booleans you would need to assemble them, make an assembly neighborhood out of them, and then you can do the booleans in the part doc or as an inplace edit.

Let me ask you do these shapes need to be separate parts? If not, draw all shapes in one part document and then you can do a Boolean with them more easily.

Hope this helps

Bill

Sent from my Pixel XL using Tapatalk


Re: how do you substract one part from another

Posted: Wed Nov 22, 2017 6:19 am
by JuP
Hello,

If you don't want to create a new document, you can also include directly your second part in the first with that:
2017-11-22_06-17-43.png