Problems using dwg file as a base part rel 2001

I have a 2D dwg file of some parts I have to model in 3D. I thought it would
be simple to go into sketcher, then select Sketch/From File, import the
lines I want, then use them as ref edges for the protrusions/cuts. Its
basically a flat plate with a complex profile, with about fifteen triangular
shaped cuts with filleted corners in it.

The problem I have is the whole section has over 100 imported lines/arcs. As
soon as I position the dwg in sketcher, Proe wants to calculate all the
dimensions (this also happens even with Intent Manager off, except a little
later on in the process). Then my computer hangs for a long time - perhaps
an hour or more. The processor is running at 100%, ram at about 50%. My
processor is 1.7Ghz.

I have resorted to importing small portions of the section at a time to get
around this (about 20 lines/arcs), but it takes ages to build up what should
be simple parts this way, and if you don't select one or two extreme
features with each import, the drag point for the sketch isnt in the centre
of the section so is difficult to place.

I want to be able to import the entire section and create a single
protrusion feature, then import the entire seciton of cuts and create a
single cut feature.

Has anyone got any better suggestions?

Is there any way to import the features in such a way that Proe doesn't have
to recalculate every single vertex?

Why is sketcher so cpu intensive?

 

: I have a 2D dwg file of some parts I have to model in 3D. I thought it would
: be simple to go into sketcher, then select Sketch/From File, import the
: lines I want, then use them as ref edges for the protrusions/cuts. Its
: basically a flat plate with a complex profile, with about fifteen triangular
: shaped cuts with filleted corners in it.

Check this out from the PTC.com website. It's a free download, seems like
something you could use.
:
: The problem I have is the whole section has over 100 imported lines/arcs. As
: soon as I position the dwg in sketcher, Proe wants to calculate all the
: dimensions (this also happens even with Intent Manager off, except a little
: later on in the process). Then my computer hangs for a long time - perhaps
: an hour or more. The processor is running at 100%, ram at about 50%. My
: processor is 1.7Ghz.
:
: I have resorted to importing small portions of the section at a time to get
: around this (about 20 lines/arcs), but it takes ages to build up what should
: be simple parts this way, and if you don't select one or two extreme
: features with each import, the drag point for the sketch isnt in the centre
: of the section so is difficult to place.
:
: I want to be able to import the entire section and create a single
: protrusion feature, then import the entire seciton of cuts and create a
: single cut feature.
:
Have you tried using 'File>Open', selecting the type of file (SEC DWG DXF) and
opening it directly? Using this as a 'template' for 'use edge' sections in
sketcher might work. It won't be parametric, obviously, but doesn't sound like you
need anything eleborate.

: Has anyone got any better suggestions?
:
: Is there any way to import the features in such a way that Proe doesn't have
: to recalculate every single vertex?
:
: Why is sketcher so cpu intensive?
:
I run into this question a lot, seems to have it roots in the impression people
have of sketching based on experience with drafting programs. The difference is
parametrics and associativity. 2D sketching is basically connect the dots for
creating draft entities. Until the last couple revs of AutoCAD, there was no
connection between these entities nor between the entity and a dimension and, so,
not really very much to keep track of. Pro/e, on the other hand, is using sketcher
to create fully dimensioned, fully contrained geometry referencing other features.
And every time you change something or create a new sketcher entitiy, it needs to
calculate not only where it is, how it's constrained but what effect it has or
what effect other geometry has on it. On top of all this, it is even checking the
viability or integrity of the geometry for creating a solid. It warns of extra
entities, it won't try to create a solid from an open section and warns you and it
is even evaluating the geometry in terms of proportions, warning, for example, of
short sides. So, I guess the short answer to that question is that Pro/e is just
doing a whole hell of a lot with even a 'simple' sketch.

David Janes

 

I don't have Acad and have no control how the files are created. I might try
importing the dwg and exporting from Proe into IGES.

 

Do you mean Auotbuildz? Won't work with rel. 2001

 

Importing the dwg and exporting from Proe into IGES, then using the iges
file as the base part actually worked, much faster than importing into
sketcher. Thanks for the tip!