ellipse won't convert to polyline

[zera]

I'm drawing up a part, and the top profile is an ellipse. The other geometry is lines and circular arcs. The arcs and lines will join together, but the ellipse won't I've checked the points to ensure that they are connected, and they all are. Even when I increase the fuzz distance.

 

Using pedit btw

 

Thanks

[eldon]

An ellipse is a separate AutoCAD object type so will not join up using pedit.

 

However, a quick way to convert an ellipse is to offset it and the offset line becomes a polyline. Then erase the original ellipse and offset the offset back by the original amount, and you have a polyline where there was an ellipse.

 

The picture shows the offset, and I have shown the grips so that you can see the difference between the ellipse and the polyline

[CarlB]

One more step-

the ellipse offset is actually a SPLINE, so use FLATTEN to convert to a polyline.

[eldon]

Thank you for the final step CarlB. I expect you have a Lisp to do it in one go.

[SuperCAD]

is PELLIPSE an option for you?

[CarlB]

I expect you have a Lisp to do it in one go.

 

No, but fuccaro does

 

 

http://www.cadtutor.net/forum/showthread.php?t=1639

[fuccaro]

Thank you Carl!

Zera, if you decide to use that Lisp, read all the thread and use the latest routine posted. The first ones have small bugs.

[zera]

Thanks guys, I got to playing around with it some, and converted it to a region instead of using pedit. I've been having to calculate the area of a part to estimate material costs. I was trying to convert to polyline for tool and die. I appreciate it guys.