Trim Command

I have an ellipse drawn with a line through the centre.
I want to trim one side of the ellipse but it just won't happen.
I have drawn other similar objects in the same window and have been able to
modify them using the Trim command without a problem.
Any suggestions?
Thanks,
Mal

 

Does the line intersect the ellipse at TWO POINTS? It has to.

 

I have sometimes had that problem with 2002. You could try the line again
or you could use the break command to break the ellipse at the points where
it crosses the line.

I think there are a few anomilies and bugs still left in AutoCAD. Such as
the one at my college we were all using that made some kind of general fault
when you started to 3D orbit something.

 

Bet you were using Windows 98. The orbit problem is not a bug in autocad,
Win. 98 can't handle it.

 

I saw ORBIT work on win98/2002. (I'm positive.)

 

Try trimming the same part twice. Since A2000 I often find that
ellipses don't trim properly the first time (as if there were two
ellipses one on top of the other).

John B

johnbogie btinternet.com
Put the "at" in the gap.

 

Yes, it will, sometimes. We had 22 machines running Win 98 and AutoCAD 2002.
Everything worked just fine until file sizes started getting large and/or
complicated. That's when Win 98 showed it's true (lack of ) performance.
They have since been upgraded to XP except for one. It is running Win 2000.
The 2000 machine is the best of the bunch but XP's not bad.

 

It was Windows 2000 NT as it was a networked room. The problem was
intermittant but when the terminals crashed and closed down, you could take
safe bets that it would happen just as you were orbitting an object. And
the files were unrecoverable.

After that I tended to start saving after every major part of my drawing
instead of every ten minutes, although I saw it happen to someone who had
just completed a drawing for their assessment without periodical saves.
Nasty.

There's a lesson there for all of us regardless of experience!

 

It has something to do with your particular system. I have not seen that
problem (with that function) on XP or 2000.

 

Try setting PELLISPE to 1.

That is your ellipse will be a pline not a true ellispe.

Terry

 

Try listing both the ellipse and the line. Make sure that they've both got
the same "z" value. Your situation sounds very like the line (or the
ellipse) may have been "lifted up," meaning that the two objects *don't*
intersect, even if though they appear to.

I once had an entire house drawing (plans, sections, elevations) where that
had happened. For about two weeks it was a passable definition of purgatory
:-(

That was untill I discovered the "qselect command" ;-)

Hope this helps. DJE