Solids Anyone

[the1yyz]

I am working in solids and trying to use the Boolean feature. I have a positive mold block (TOP) and I wish to Boolean out the cavity on the Bottom Block. When I try to do this I get a parisolids error. Boolean operation will result in a non-manifold body. Please explain what I am doing wrong.

[Zero]

can you post the file (zipped), or just the solids you are having trouble with, on the ftp? it would be easier for us to help you out if you did

 

[ 12-30-2003, 11:59 AM: Message edited by: Zero ]

[the1yyz]

Sorry I can't at this time as this relates to a new product. If you could give me so general reasons fo a non-manifold body error message I can probably fix it.

[Fig sign]

Expand your top block more .

It looks like it in some places touch or under the down block so boolian remove will result in

divided(non-consistent) solid

 

Iskander teh

[Zero]

quote:

---

Expand your top block more .

It looks like it in some places touch or under the down block so boolian remove will result in

divided(non-consistent) solid

---

+1 without seeing the solids. Make sure they extend past each other and aren't sharing faces that need to be removed.

 

 

...oh and if you choose to keep your original solids, it should let you make a "disjointed" or "non manifold" solid...they just won't be associated, I think. It's been a while...

 

[ 12-30-2003, 12:35 PM: Message edited by: Zero ]

[robk]

Is the Boolean Operation being performed though? Or is it not removing one solid from another at all?

 

This is directly from the help menu---

 

quote:

---

If a Boolean Remove or Common operation fails because it would create a disjoint body, a message displays giving you the option to create a non-associative Boolean (a brick solid). Respond in one of the following ways:

 

¨ Choose Yes to continue the Boolean operation and display the Keep menu.

 

¨ Choose No to cancel the Boolean operation.

 

Note: Mastercam is unable to create disjoint bodies and maintain associativity between them. Creating and keeping a non-associative Boolean will create entirely new brick solids that represent the resulting disjoint pieces, without changing either the target or the tool.

---

[Fig sign]

Non-consistent is not the only problem .

When 1 block touches another Parasolid sometimes can not divide them.

Sorta divide by zero error !

 

Iskander teh I`ve seen it many times

[Fig sign]

And disjointed solids are ver9. feature ,if I am right .

If U are working with ver8 . I think U will not have this option

 

Iskander teh

[the1yyz]

I am working in version 8.1

 

I do have Solid Edge though and am thinking about using it instead.

[Zero]

Well then yes, that's a problem. You cannot make disjointed soilids in 8.x

[Fig sign]

quote:

---

I am working in version 8.1

 

I do have Solid Edge though and am thinking about using it instead.

---

Come on ,it is rather simple to achieve.

First of all ,probably U can expend your upper block with building one more solid and boolian->add.

If no, make copy of your solids in the separate level,Make boolean->common and subsltract it from lower solid .

Or trim lower solid with surface or plane and then make boolian remove .

There always exists a solution ,just think a bit in this direction.

 

Iskander teh I hate Solid Edge

[heeler]

Every time that I have had this error, I could find a place where when removing the solid from the other solid I would end up with 2 pieces of the 2nd solid. If you can find that place and make the 2nd solid smaller or the 1st one bigger you should fix the problem. In version 8 you can have only 1 solid body result with the booean remove feature.

 

HTH

 

Glenn

 

P.S. If you could email me a sample maybe I could help you? I know that is unlikly but maybe you could change it somehow to show what you are trying to do, and then I could help.

[the1yyz]

The actual error is cannot create a non-manifold body.

[the1yyz]

I developed the original positive shape for the upper die and then place it into the block (upper).

 

I have not made them common.

I just wanted to use the upper solid shape without the upper block to boolean a cavity into the lower block. And yes I have done this before.

This particular solid I am assuming has problems.

And I am trying to fix them so that I may continue. To make the bottom Block.

 

This is for a forming die.

[Rick Damiani]

Without being able to see the file, it's difficult to know what the problem might be. The non-manifold body error on boolian ops is usually related to the kinds of problems others in this thread have already mentioned. It is also possible that the solid is damaged, though that seems somewhat less likely. Well, unless you trimmed one of the solids with a surface. That seems to be a real bugbear for any solid modeling package.

 

Before I tried drawing it again, I'd try using the NOHIST C-hook (was that part of 8.1?) to remove the history tree from the solids in question and re-do the boolian. If you don't have NOHIST, export the solids as Parasolid files and re-import them. They'll be dumb solids w/ no tree then, and you can try the above. If the model(s) in quesiton do invovle surface trims, look at those trims and see if there isn't some way you can defer the trimming operation(s) until after you boolian the models.

[Zero]

You can get the nohist c-hook from jay's ftp here