VOID EXTRUSION... this used to work...

[georgehobel]

I figured this out in one of my other models, but its not working now... and I dont really know why..

I created an extrusion to form an "eyebrow" roof across an elevation.. it sticks out above the surface of the roof, so I trimmed it with a void extrusion... worked perfectly last time i did it.  I was so proud.  Now... i'm losing hair.

i just did my first screen cast.  uploaded to somewhere.... (must be with my tax refund)???

i posted the project since i cant find the screen cast.

[georgehobel]

here's the screen cast

[cbcarch]

Use Cut Geometry BEFORE you close the Void sketch, and pick the element to be cut.

[georgehobel]

thats right... i forgot that step... still not achieving success though

[cbcarch]

Try using Component>Model in place>Void>Generic Model, instead of using the Wall tool.

[georgehobel]

thats' a previous model, same condition, same exercise, just last week... and it worked.  Now it's not working at all.   I even tried using some basic forms exactly as pictured in the tutorial... but its not performing the same as the tutorial.... grrrrrrrr

[georgehobel]

i also tried the path you suggested, but it seems that I dont have that option... I cant find a path to void...

[cbcarch]

Architecture Tab>Component>Model in place>Family Category and Parameters>Generic Model--give it a name like roof void cut>Void Forms>Void Extrusions

[barthbradley · Accepted solution]

@georgehobel: The Solid and the Void Cut should both be in the same In-Place Component -- not built separately from each other and then combined. 

...basically, just edit the host (the Solid extrusion) and add a Void Cut to it. 

[georgehobel]

ok.. so that worked... first select the object, and then select "edit In Place"  . then, while i'm in the editor, create the void extrusion .  That 's not what I did last week, but it worked today.

@cbcarch  I'll take another whack at your approach also... not sure if I can respond before the forum holiday, but thanks in advance...

[ToanDN]

I think last week you cut a system family with a void and this week you are trying to cut an in place family with a void.

[SteveKStafford]

Looks like you've moved on but...

A void that comes into contact with an existing solid when its sketch is finished will cut that solid(s) automatically. It it does not then we must use Cut to tell Revit the void should cut this or that solid.

I often place a void so that it does not intersect at first or I create a solid first and then change it to a void later...as I work through a complicated form. Then when I'm satisfied the void form is correct I use Cut.

[georgehobel]

I thought that I had created the original object the same way both times, but I could be mistaken... that would explain why its not behaving in the same manner...

[georgehobel]

Steve I appreciate everybody's input.  I have learned that there is almost always more than one way to get to the solution.  It's great to have all sorts of tools in your box. I'm grateful for the interaction.

[barthbradley]

---

@georgehobelwrote:

 I have learned that there is almost always more than one way to get to the solution. 

---

As my Dad always said: "There's more than one way to skin a cat" ... which is an odd and disturbing thing to say to a toddler who loves kitties.