Tangential elements

[[Ja...]]

Did a quick search of the forum but didn't find what I was looking for. How do I know for sure if this is using inner tangential or outer tangential? 

If I look in the help file, I see this which is obviously backwards:

Maximum inscribed is going to give you the smallest diameter, not the largest. And minimum circumscribed is going to give you the largest diameter, not the smallest. So now I'm wondering if just the help file is backwards, or is Calypso actually going the wrong way? Or am I looking at it all wrong?

[[Ke...]]

It uses whichever is appropriate depending on the feature type. For example, for an ID hole it will use Max Inscribed, which is the Largest circle that lies within all collected data points, meanwhile for an OD it will use Min Circumscribed, which is the Smallest Circle that surrounds all measured points. Thats where the largest/smallest language comes from, which often causes confusion. How it determines which to use  is whichever is out of the material, not into it (a min circumscribed on an ID hole would place the circle inside the parent material, not in the empty apace of the hole. Likewise, a max inscribed on an OD boss would be inside the boss, not in the space around it) 

Edited Wednesday at 02:29 AM

[[Ja...]]

That's what I was hoping it was doing. I'll have to trust it for now but I'll probably test it at some point just so I have more confidence in it. Thanks for response Kevin.

[[Ma...]]

Please sign in to view this username.

i am rather using tangential element instead of choosing inscribed / circumscribed - i am affraid i'll make a mistake - tangential in/out is much more clear to me 😄 I hope since you can choose from them it's not different evaluation.
Or perhaps somewhere it's written as tangential and other method is chebysev in/out

[[No...]]

I think the first line ("completely outside the material") describes it best:

Visualize the point normals of the feature in question. They always point away from the material by definition. The tangential element touches the outermost points of the material. It doesn't matter if the "outside of the material" lies on the "inside of a bore" or the "outside of a bolt". 

I always found the terms "maximum inscribed" and "minimum circumscribed" somewhat misleading. In German we say "Hüll" and "Pferch" and everybody understands the meaning 😄 

 

[[Ja...]]

Even if Zeiss did have it wrong when the new library was released, I'm sure it'd be fixed by now. It would be much more reassuring if there was some way the software would let us know which method it's using. I'm definitely not a fan of this secrecy stuff. It lowers my confidence level in the results I'm getting.