topic Re: Cannot get"Interfere" command to delete Interference Objects. in AutoCAD Forum

Cannot get"Interfere" command to delete Interference Objects.

kcol-kkc — Thu, 23 Mar 2017 15:33:12 GMT

I have two 3D solids. I have brought them together to intersect but need on solid to remove part of the other solid. I'm assuming Interfere is for that operation. However when I toggle "Delete interference objects created on Close" it does not remove the interference.

What am I doing wrong?

Re: Cannot get"Interfere" command to delete Interference Objects.

Alfred.NESWADBA — Thu, 23 Mar 2017 16:13:10 GMT

Hi,

>> but need on solid to remove part of the other solid

Isn't that command _SUBTRACT you are looking for?

- alfred -

Re: Cannot get"Interfere" command to delete Interference Objects.

kcol-kkc — Thu, 23 Mar 2017 16:17:42 GMT

Well... I tried subtract first but it removed all of the other solid except where the two connected. Tried picking them in the opposite order and that didn't give me the results I was looking for either. Tried union but that left the part I want to remove.

Re: Cannot get"Interfere" command to delete Interference Objects.

Alfred.NESWADBA — Thu, 23 Mar 2017 16:28:18 GMT

Hi,

>> I tried subtract first but it removed all of the other solid except where the two connected

From my understanding you do have 2 parts and you want to connect them.

So make a copy of part A ==> result is you have A1 and A2

Then run command _SUBTRACT, select object B and then (to be subtracted) ==> A2

The result is Object B having a whole where it intersects with A + the object A

I hope I understood you correct and you can follow that workflow.

- alfred -

Re: Cannot get"Interfere" command to delete Interference Objects.

kcol-kkc — Thu, 23 Mar 2017 17:52:28 GMT

Alfred,

Did you see the image I attached to my post? It shows the area I want removed in red?

I'll take some additional screen captures to try to illustrate what's happening.

Re: Cannot get"Interfere" command to delete Interference Objects.

kcol-kkc — Thu, 23 Mar 2017 17:59:52 GMT

Okay... 3 screen captures.

I have part A as a solid cap so to speak.

I want to take the shape of Part B out of the side of Part A.

When you look at the Combined image it shows the area of Part A that shouldn't be there.

Re: Cannot get"Interfere" command to delete Interference Objects.

kcol-kkc — Thu, 23 Mar 2017 18:02:43 GMT

If I use the Subtract command and select Part A first and Part B second this is what I get.

Re: Cannot get"Interfere" command to delete Interference Objects.

Alfred.NESWADBA — Thu, 23 Mar 2017 18:03:06 GMT

Hi,

>> It shows the area I want removed in red?

Yep, you can copy the red part and subtract it from object A and from object B (you'll have first to copy the parts).

But it's not clear for me how that would then be combined, because when you subtract your red part (from post 1) from both objects, from A and from B ... these objects will not hold together.

- alfred -

Re: Cannot get"Interfere" command to delete Interference Objects.

kcol-kkc — Thu, 23 Mar 2017 18:03:37 GMT

If I use the subtract command and select Part B first and Part A second this is what I get.

Re: Cannot get"Interfere" command to delete Interference Objects.

Alfred.NESWADBA — Thu, 23 Mar 2017 18:04:35 GMT

Hi,

>> If I use the Subtract command and select Part A first and Part B second this is what I get

And if you first copy object B - then run the subtract -.then you have 2 parts fitting together 😉

- alfred -

Re: Cannot get"Interfere" command to delete Interference Objects.

kcol-kkc — Thu, 23 Mar 2017 18:05:50 GMT

See and that's where the rub is. I'm learning. So I know I'm not doing it correctly but not sure what the command is I want to use to achieve the end result which is both parts combined with Part B being whole and Part A having a portion removed.

Re: Cannot get"Interfere" command to delete Interference Objects.

kcol-kkc — Thu, 23 Mar 2017 18:08:02 GMT

<<And if you first copy object B - then run the subtract -.then you have 2 parts fitting together ;)>>

Oh so I need to keep one part whole and then connect them. One question. If you look at Part A after the subtraction there is a little rounded piece that is still in the middle. How would I remove that?

Re: Cannot get"Interfere" command to delete Interference Objects.

Alfred.NESWADBA — Thu, 23 Mar 2017 18:19:33 GMT

Hi,

>> after the subtraction there is a little rounded piece that is still in the middle

Please upload the drawing in the current state, just to be sure we see the same (and are speaking about the same)

- alfred -

Re: Cannot get"Interfere" command to delete Interference Objects.

kcol-kkc — Thu, 23 Mar 2017 18:26:37 GMT

Alfred I think I got it. I used a solid cylinder the same width as Part B which removed that piece in the middle of Part A as well. Then the real Part B fit right in. Tricky... You really have to think outside to box on this 3D stuff. When you're drafted in 2D for 30 years it's kind of hard to get out of 2D mentality.

Thanks for the help I think I got it!!!

Re: Cannot get"Interfere" command to delete Interference Objects.

filiph_sandbergGWL2Q — Wed, 10 Dec 2025 09:29:29 GMT

Take that "expert elit member" batch off your chest.. jeses,, we want do delete the part that intersect, it was clear from the first post.. WE don't want to use the subtract command.....

Re: Cannot get"Interfere" command to delete Interference Objects.

filiph_sandbergGWL2Q — Wed, 10 Dec 2025 09:52:43 GMT

Why can't this be deleted