Unite fails because thru face does not intersect path of the tool
Unite fails because thru face does not intersect path of the tool
(OP)
nx 8.5
i tried to unite a cylinder and a swept geomeetry (picture1), but failed.
i kind of know the reason because one dimension in the sketch for the swept is set as EXACTLY equal to "diameter/2". I assume the unite operation would be successfull because the sketch is perfectly attached to the cylinder based on the dimension i specify. the reason i do this is i use the same modeling method in Inventor and no trouble for me...
Now, in the NX, it's a fail operation.
one way to avoid this issue is to make the dimension of the sketch just inside the cylinder, say "diameter/2 - 0.1" so that later on swept operation intersects with the cylinder and then i can unite. but i dont like this way....
Is there any better way to avoid this issue?
thanks
pic1
http://files.engineering.com/getfile.aspx?folder=2...
pic2
http://files.engineering.com/getfile.aspx?folder=5...
model
http://files.engineering.com/getfile.aspx?folder=0...
i tried to unite a cylinder and a swept geomeetry (picture1), but failed.
i kind of know the reason because one dimension in the sketch for the swept is set as EXACTLY equal to "diameter/2". I assume the unite operation would be successfull because the sketch is perfectly attached to the cylinder based on the dimension i specify. the reason i do this is i use the same modeling method in Inventor and no trouble for me...
Now, in the NX, it's a fail operation.
one way to avoid this issue is to make the dimension of the sketch just inside the cylinder, say "diameter/2 - 0.1" so that later on swept operation intersects with the cylinder and then i can unite. but i dont like this way....
Is there any better way to avoid this issue?
thanks
pic1
http://files.engineering.com/getfile.aspx?folder=2...
pic2
http://files.engineering.com/getfile.aspx?folder=5...
model
http://files.engineering.com/getfile.aspx?folder=0...





RE: Unite fails because thru face does not intersect path of the tool
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
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Cypress, CA
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RE: Unite fails because thru face does not intersect path of the tool
RE: Unite fails because thru face does not intersect path of the tool
NX7.5 + TC8.3
RE: Unite fails because thru face does not intersect path of the tool
The 8.5 behaviour is not a bug but how NX works in older versions.
You are trying to unite a highly complex Nurbs face , which is using a tolerance, to an exact cylindrical face. The Nurbs face is not identical to the cylinder, it has small undulations within the tolerance which might be both inside the cylinder as well as outside. In older versions of NX these faces must be either identical or overlapping, else the Unite operation fails.
The comparison to Inventor is completely irrelevant. Inventor uses a different modeling engine than NX. How a specific feature is implemented in the cad system can be / is completely different as well as the algorithms in the modeling engine itself. Parasolid can do some things which Inventor cannot and vice versa.
Regards,
Tomas
RE: Unite fails because thru face does not intersect path of the tool