Stock size Bounding box

[uwam2ie]

I have been using analysing the stock size for partslist based on grip :

http://www.eng-tips.com/viewthread.cfm?qid=52509&page=165

but in some case the report is wrong. I have attached the grip solutions and a problem body as parasolid. The length reported should be close to 300mm and not 304mmm.
Another problem I have with this solution is when the base orientation is bad - wrong results. Any ideas, how do you manage this other solutions?
THX in ad

 

[JohnRBaker]

If you look at the user documentation for GRIP covering the SOLBOX/ command you would see:

Description

Determines the coordinates of the diagonal corners of a box containing a specified solid body, face, or edge. The box is aligned with the absolute coordinate system. This box contains the specified solid body, face, or edge. The box is usually close to the minimum possible size, but this is not guaranteed.

The system returns a six word array indicating the coordinates of the diagonal corners of the box as follows:

minimum XC coordinates of the box
minimum YC coordinates of the box
minimum ZC coordinates of the box
maximum XC coordinates of the box
maximum YC coordinates of the box
maximum ZC coordinates of the box



John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[uwam2ie]

thank you John,
I should read the F*** manuals and not only copy code.
How can I get better results, are the some tipps around,
to get what I need, min box (orientated) close to minmum material use.
thx in ad

 

[phillpd]

I think you'll need to use NX/Open, although pre-NX4 there are still "some" issues with the incorrect size of box being returned.

NX4 offers the function UF_MODL_ask_bounding_box_exact(), although the results can be much slower.

Specialty Engineered Automation (SEA)

http://www.sea4ug.com

a UGS Foundation Partner

 

[uwam2ie]

... ok phillpd,
I prefer any grip solution

 

[cowski]

There is a program in the grip library called 'Part Envelope' that also performs this calculation. Its results are based on the planes of the WCS so may give better results for you based on your part's shape and/or orientation. I have done some testing with it, but I do not use it on a regular basis, so I cannot comment on its speed or accuracy.

 

[uwam2ie]

thank you cowski,
I tried part envelope, I looked at the source, its witout solbox, but the results are not better when the body is not directed.

 

[uwam2ie]

... thanks again,
I've reworked part envelope , now its ok...