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Thread: Extrusion Void form

  1. #1
    Junior Member Dude__'s Avatar
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    Extrusion Void form

    I created a conveyor merge, everything went fine, In fact I created it within a few minutes, mainly thanks to advice on various subjects I received from this forum. So thanks!

    But.....I put in a void extrusion in front of the merge, so that when I load the family into a project, and attach it to a take-away conveyor, I assumed the void would make the sideguard of the other conveyor family it's attached to, disappear. Now it works on plan view, you can tell by the linework that the side of the takeaway conveyor is gone. Perfect. However, in 3D view, I see my clear space protruding through the sideguard itself, yet the sideguard of the take-away conveyor is still there. Shouldn't a void make whatever is inside of it disappear, even in 3D?

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    Junior Member Dude__'s Avatar
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    Of course the clear space on my merge is just glass material but still, if I am calling out a void form in front of that clear space, the material shouldn't matter, the void should void whatever is in that box, correct?

  3. #3
    The Moderator with No Imagination MPwuzhere's Avatar
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    Voids are used to cut modeled elements, not for hiding elements.

    BTW, pictures help out a lot (use the snipping tool and save a png) so we can see what you are seeing....or post the family.
    elton williams likes this.

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    Junior Member Dude__'s Avatar
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    Here are the views of my merge, merging onto a take-away belt, the 3D view, as well as the view of the family itself, and the plan view. the 3D image of the merge itself, as you can see in amber color, that is where I added my void, assuming it would void that area of whatever it is attached to.
    Attached Thumbnails Attached Thumbnails Extrusion Void form-merge-plan-view.png   Extrusion Void form-3d-merge-layout.png   Extrusion Void form-45-merge.png  

  5. #5
    Mr. Revit OpEd
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    Voids can cut Solids, nothing else. They don't cut a solid automatically unless they (solid and void) intersect each other when the void is created and the sketch is finished. If the order of creation isn't in that order then the Cut Geometry tool is required to tell Revit the void should cut the solid(s). This way a void can cut some solids but not all of the solids it comes into contact with.

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