Sweep problem w SW2003 SP3.1

(using SP3.1- haven't checked other SPs)

<<Cannot get a point on the path to start with. ...... For a closed path,
the path must intersect with the section plane.>>

I'm getting this error when I shouldn't, doing a simple sweep along a path
which is a model edge. The path starts exactly on the section plane: in fact
the section plane is defined using the vertex at the end of the model edge
in question.

The wierd thing is, I only get the error if I turn on "Tangent Propagation",
otherwise the sweep works OK. The model edge in question is tangent to
subsequent model edges, but eventually a vertex is reached where tangency no
longer applies.

Anyone got any ideas?

 

Use a composite curve or convert entities into a 2D or 3D sketch?
Also, are you using a guide curve or just a path?

matt.

 

The only way I was able to get the same results was if the plane was in the
middle of the tangent propagation. If I put the Plane and sketch at either
end of the contour I could do tangent propagation. But if it was in the
middle I could get it to follow one edge but not propagate. sw2003 sp4.0

Corey Scheich

 

Matt

Thanks for your queries and interest

The sweep profile is a 2D derived sketch. The path is a model edge. The
derived sketch lies on a plane defined using the vertex at the end of the
model edge in question.

There are no guide curves

 

Thanks Corey

I think you've hit the nail on the head

It seems that if you want to propagate a sweep IN ONE DIRECTION ONLY from a
vertex which lies part way along a set of edges which are tangentially
connected, you need to make a composite curve for the path, using only the
edge segments in the direction you wish the sweep to travel.

I seem to remember having known this, once upon a time!

Thanks for taking time to solve this

Andrew Troup