See the attached. Or just try by yourself: draw a cube in ACAD, switch to an ISO view, print out at 1:1 scale, measure it on paper. Think about this case: a circle in ISO view is an ellipse. How can the dimensions of an ellipse are the same as those of a circle?
@caronte01 said:
In isometric, you should get real dimensions. Lines on the x, y and z direction should be to scale(1:1). ThereĀ“s probably a bug in 2d iso export that will export isometrics at .8 ish of the correct scale. IĀ“ve also had it. The solution has been to scale with reference in acad the exported dwg.
S