Chamfer abnormality.

[Anonymous]

Hi everyone,
In the attached file the edge chamfer delivers different reading when
measured. And it looks different on the screen too. Can anyone tell me
what's going on? Is it reproducible issue or is it on my computer only?
Thanks in advance,
Igor.

IV 2010.

--
Web: www.meqc.com.au

[johnsonshiue]

Hi! The way chamfer computes is quite similar to fillet. Typically, an edge on a solid has two adjacent faces. When it is selected for chamfer, Inventor will compute the chamfer boundary on each adjacent face by offsetting the selected edge loop in assigned distance on the adjacent face. Once the boundaries are defined, the chamfer face can be obtained.
To prove my point. You can simply do this experiment.
Move EOP above the chamfer.
Create a 3D Sketch->include geometry->pick the chamfer edge->finish.
Move EOP to the bottom.
Create a workpoint (A) by selecting the 3D Sketch and YZ plane.
Create a workpoint (B) by selecting the chamfer boundary edge (top) and YZ plane.
Create a workpoint (C) by selecting the chamfer boundary edge (bottom) and YZ plane.
The distance between A and B should be 0.5mm as is the distance between A and C.
The same test can be performed on XY plane.

Let me know if you have any question.
Thanks!

johnson.shiue@autodesk.com

[Anonymous]

That's not all, Johnson.
The chamfers are differing from one edge to the other, as seen here with
Rel. 2011

Walter


schrieb im Newsbeitrag
news:6378960@discussion.autodesk.com...
Hi! The way chamfer computes is quite similar to fillet. Typically, an edge
on a solid has two adjacent faces. When it is selected for chamfer, Inventor
will compute the chamfer boundary on each adjacent face by offsetting the
selected edge loop in assigned distance on the adjacent face. Once the
boundaries are defined, the chamfer face can be obtained.
To prove my point. You can simply do this experiment.
Move EOP above the chamfer.
Create a 3D Sketch->include geometry->pick the chamfer edge->finish.
Move EOP to the bottom.
Create a workpoint (A) by selecting the 3D Sketch and YZ plane.
Create a workpoint (B) by selecting the chamfer boundary edge (top) and YZ
plane.
Create a workpoint (C) by selecting the chamfer boundary edge (bottom) and
YZ plane.
The distance between A and B should be 0.5mm as is the distance between A
and C.
The same test can be performed on XY plane.

Let me know if you have any question.
Thanks!

johnson.shiue@autodesk.com

[SBix26]

Johnson, what you say is true in the YZ plane, but not even close in the XY plane-- see attached illustration.
Sam

[Anonymous]

Hi Johnson,
Thanks for looking into it. Perhaps I wasn't quite clear in my original
post. Let me try to rephrase it. I was asking why two opposite edges of the
same hole show different chamfer geometry? Just like in the attached
pictures.
As for the way the chamfer is represented in such models - there can be two
approaches. First - the chamfer is made with countersink tool. Then it will
be of different width with the large ones at apexes. Second way - the chafer
is made using hand held deboning tool. In this case the chamfer will have
uniform width along the edge.
Best Regards,
Igor.
--
Web: www.meqc.com.au

wrote in message news:6378960@discussion.autodesk.com...
Hi! The way chamfer computes is quite similar to fillet. Typically, an edge
on a solid has two adjacent faces. When it is selected for chamfer, Inventor
will compute the chamfer boundary on each adjacent face by offsetting the
selected edge loop in assigned distance on the adjacent face. Once the
boundaries are defined, the chamfer face can be obtained.

Let me know if you have any question.
Thanks!

johnson.shiue@autodesk.com

[Anonymous]

Thanks, Walter
That's exactly what I was asking for.

Igor.

--
Web: www.meqc.com.au

"W. Holzwarth" wrote in message
news:6378970@discussion.autodesk.com...
That's not all, Johnson.
The chamfers are differing from one edge to the other, as seen here with
Rel. 2011

Walter


schrieb im Newsbeitrag
news:6378960@discussion.autodesk.com...
Hi! The way chamfer computes is quite similar to fillet. Typically, an edge
on a solid has two adjacent faces. When it is selected for chamfer, Inventor
will compute the chamfer boundary on each adjacent face by offsetting the
selected edge loop in assigned distance on the adjacent face. Once the
boundaries are defined, the chamfer face can be obtained.


Let me know if you have any question.
Thanks!

johnson.shiue@autodesk.com