I am using Inventor Fusion for Mac. I created a model that includes a 1" diameter cylinder. I know the size was correct as I exported an STL file that was sent to shapeways.com and 3-D printed.
Now, I re-open the f3d file and add a new cylinder with a 1/8" diameter. It is far too large when compared to the original 1" cylinder. It seems as though no size info is getting saved with the model. Is this correct or am I doing something wrong?