Jump to content

How to separate united solids


Reid

Recommended Posts

Hello, I am a a moderately advanced user. Is there a way to split solids, say, I have combined 6 boxes and a cylinder in the center to form a fan, via the union command, and now I want to separate them again. At present I have one solid entity. I can do stuff to faces and explode them, but don't know how to return to having six separate boxes and the cylinder. Slice is one option, thinking of one simpler

Link to comment
Share on other sites

  • Replies 21
  • Created
  • Last Reply

Top Posters In This Topic

  • ReMark

    6

  • JD Mather

    6

  • Reid

    5

  • Patrick Hughes

    2

Top Posters In This Topic

Reid

According to me slice is the only & the best option of seperating the solids. Although if you are finding it difficult,you can attach it here i ll try to do it for you.

Link to comment
Share on other sites

Reid

According to me slice is the only & the best option of seperating the solids. Although if you are finding it difficult,you can attach it here i ll try to do it for you.

 

I agree with the slice option, also you can set the solid history to Yes and it will show the outline of the separated solids for reference.

 

KC

Link to comment
Share on other sites

If any of your slices are not planar then create Surface bodies for using with Slice. Use the option to retain both sides of the slice. You might check the tutorials in my signature.

Link to comment
Share on other sites

Thank you. DELOBJ is 1. Slice will not work with spherical intersections. I am after a routine rather than a single task. Is DELOBJ equivalent to Record History? Cad keeps history of Boolean, but only as long as there is no editing to sub objects. I kept Record History turned on, but lost Boolean history anyway after editing some faces and could not retrieve it

Link to comment
Share on other sites

DELOBJ

 

"Controls whether geometry used to create 3D objects is retained or deleted."

 

Since your variable was set to 1 the profile curves were deleted (includes those used with extrude, sweep, revolve and loft commands).

 

You're asking if there is a routine (LISP?) for handling spherical intersections?

Link to comment
Share on other sites

Are you referring to SOLIDHIST?

 

"Controls the default History property setting for new and existing objects. When set to 1, composite solids retain a “history” of the original objects contained in the composite."

Link to comment
Share on other sites

Slice will not work with spherical intersections.

 

Sure it will.

 

I would not have record history turned on - I have seen many problems with this.

 

If you follow the instructions in my tutorials Delobj should be off - put generating curves on hidden layers in case you need then later.

 

Zip and attach your file here.

Link to comment
Share on other sites

From AutoCAD Help:

 

To specify that a solid will record a history of its original forms.

  1. If the Properties palette is not displayed, click Tools > Palettes > Properties.
  2. In a drawing, select a solid.
  3. On the Properties palette, Solid History area, under History, select Record.

Link to comment
Share on other sites

I am after a routine rather than a single task. ... but lost Boolean history anyway after editing some faces and could not retrieve it

 

AutoCAD is limited in 3D tools such as what you are trying to do - more of a brute force approach is generally required.

 

Autodesk Inventor is probably more appropriate - the tools have already been coded, and you would not lose feature history.

Link to comment
Share on other sites

Do you have mass elements? I haven't used AutoCad '09 much, but I use Architecture '09. When I'm separating solids in ACA, I convert the solid to a mass element, then use the trim or split by plane commands. Then you can convert it back to a 3D solid.

Link to comment
Share on other sites

Do you have mass elements? I haven't used , ...then use the trim or split by plane commands. .

 

Vanilla AutoCAD does not have mass elements and the OP indicated a desire to split with sphere. Vanilla AutoCAD will allow split with a planar or spherical surface.

Link to comment
Share on other sites

was not thinking about LISP in particular, just a principle in general. I'll see to DELOBJ, but ain't it the command line for Record History.

 

Reid, a habit I've gotten into is, as I'm constructing my model I frequently wblock out the primatives I'm working with. Or, I'll saveas the model at various stages in numeric sequences. Then if I decide to change things It is simple enough to revert to a certain level.

 

If you haven't done something along those lines you can always explode the model and use the elements to recreate. I've found this to be somewhat messy, and it is only as a last resort.

Link to comment
Share on other sites

... you can always explode the model and use the elements to recreate. I've found this to be somewhat messy, and it is only as a last resort.

 

I think I would wait to see the file before suggesting explode.

Color and xedges might also be of use. Perhaps solidedit separate at some point. But without the file....

Link to comment
Share on other sites

Yep, that's why I said only as a last resort. I'll add whenever an explode is done always, always, always retain a copy of the original.

 

Did I mention Always?

Link to comment
Share on other sites

If any of your slices are not planar then create Surface bodies for using with Slice. Use the option to retain both sides of the slice. You might check the tutorials in my signature.

 

thanks for all tips.

I don't have a specific file. I am after the concept as it is often handy to detach previously joined elements. Yes, surface will cut spherically as 2d extrusions will. don't know why retain both thou.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...