modelling tolerances

[matfio]

hello to all
I have always asked myself whether nx 'default' modeling tolerances are correct or if you can improve something.
type:
precision modeling
intersection
angle
tangency
bending
etc. .

I have an actual example : cutting a surface at 0.01mm and then union (sew) with another surface with the same tolerance and I remain a hole (not fully joins) to correct I have to decrease the tolerance of the cut at 0.009mm and merge (sew) with 0.01mm. with patch is the same thing (in this case I have to raise tolerance). I have also encountered export problems to other cad type cad
In short, they are only a few examples.
I would like to understand if it is possible to get to a better setting than the existing one.

Thank you all!

 

[IPdesign]

hello to all
I have always asked myself whether nx 'default' modeling tolerances are correct or if you can improve something.
type:
precision modeling
intersection
angle
tangency
bending
etc. .

I have an actual example : cutting a surface at 0.01mm and then union (sew) with another surface with the same tolerance and I remain a hole (not fully joins) to correct I have to decrease the tolerance of the cut at 0.009mm and merge (sew) with 0.01mm. with patch is the same thing (in this case I have to raise tolerance). I have also encountered export problems to other cad type cad
In short, they are only a few examples.
I would like to understand if it is possible to get to a better setting than the existing one.

Thank you all!

I have now set from the old version ug v16 a modeling tolerance to 0.00001

I make molds and when I supply models to customers imposed an export to 0.001 and I'm sure the geometry provided is great for their use
never complain in over 10 years.

standard tolerance of nx I believe is 0.01 inch or 0.254 mm
which for a moldist is actually a abyss.

the only contraindication could be an elongation of calculation times but this was noticed 10 years ago when working with repentum 3 to 1000 mhz
now with modern computers the difference in standard use is resible

 

[matfio]

I ask ipdesign.
But did you change the angle tolerance?
have you noticed the problem of cutting and joining surfaces (trimmed sheet and sew) mentioned post above?

I have long set the tolerances: distance 0.0001 and angle 0.1 do not know if you can improve.

according to you I have to set different tolerances even for sew, patch, trimmed sheet, curves etc.... each of the functions is a dedicated tolerance?
I'd like to find a compromise if there's one.

Thank you.

 

[IPdesign]

I have put everything with the values placed before
I know it's a piece of work, but you do it once in the customer default and don't think about it anymore.

sometimes importing geometries from customers with different cads happens to have imported geometries with problems, often iges;
in that case it decreases the seam tolerance until the surfaces are sewn.
in case the tolerance is so high that it cannot be used I ask the customer a better file .
It is not your case but many times the import (or export of other cad ) generates double surfaces that with the classic sew do not agree ... but this is another speech

 

[The_Matrix]

when working with the solid modeler imposed a tolerance of 0.01 and 0.1 angle, so much is used that parasolid that is much closer.
when working with surfaces use fairly narrow tolerances:
- distance: 0.001
- angle: 0.01

 

[matfio]

thank you very much for the answers, I hoped for a wider participation but obviously most people use preset tolerances and for what they do is more than good.
in the coming days I will test the tolerances between curves and surfaces taking advantage of the moment since I am "curating" all the aesthetic part of " ... an object" parameterizing it with splines and curved surfaces.

Hello and I will know