OK, here is the scenario:
I have this little snippet of a surface on a solid body that looks like it was created by a chamfer. This is an imported part and I just wanted to extend the surface so that it crosses my plane that I am working on.
So, I offset the surface 0" to effectively copy the surface.
Then I select "untrim surface" to 100% and select it.
However, this does not extend the surface as far as I want it to.
So, I thought about it....and I wondered if I could untrim it again.....
I would think that I couldn't...because I previously untrimmed it to 100%.....That is maximum...right?
Sure enough....selecting the surface that I JUST untrimmed and untrimming it again.
Now, it looks like a half truncated cone.
What if I keep selecting it?
Untrim # 4:
And, apparently, I can keep going, potentially extending the height of the cone infinitely.....
So....what does "100%" really mean? How does the program know when to stop?
I looked at the surface areas of the different surfaces and there really isn't a pattern.
Some of them are almost exactly 4 times the surface area of the previous one...some are almost exactly 6 times.