Originally Posted by: murray 
E
Chris, your anecdote is utterly irrelevant to this. An accurate-curves print vs. a polyline proint would make how much difference to your hapless shop's error, or how you dealt with it?
PunchCAD has plenty of meaningful things to fix, and its stablemate TurboCAD too. Both are in worse condition in some important ways than they were three years ago, maybe it's the ownership, I don't know, but this particular issue is unimportant piffle because it's never going to cause the hypothetical problems that you're proposing it might, and I'll challenge you again to pick the difference between a printed representation of "accurate curves" vs. polyline representations.
Sounds like you're outraged at me rather than Punch now. Ah well...
I'm sorry Murray, we are here talking about bugs that makes wrong representation.
As it happened to me several times the dimension tool catches wrong points on missing edges and my very important tolerance data is just...wrong.
Doing mass market products requires precision, and the injection molds I order every months (based on Shark's files AND Shark's drawings) are worth 5 000 USD (for small ones) to 300 000 USD (Complex multi-cavities, with sliders and screws)...
A very important point in my case : the
3D file is used to design the mold but the
2D drawing represents the molded part ... both are linked, but the process here is changing the resulting object.
So 2D drawing is taking into consideration all the data that cannot be included in the 3D file (polished zones, shrink, sink, deformation...).
Sometimes I have several valid 2D drawings for the same 3D file : when using different materials in the same mold (different shrink rates = different dimensions), or having 2K injection, or having in-mold assembly....
"Do not scale from drawing, but please respect written tolerances and data"
JL