Inaccurate translation; brep moved to -0.00111881 instead of 0.00000000

Rhino Rhino for Windows
#1

I try to move an brep down by 4625mm. When I measure the top and bottom of my brep after the translation, the top part moved down 4625 perfectly, but the bottom part moved down 4625.00111881mm. This is physically impossible! Can anybody explain why this happens (something similar happend before) and what I can do about it?

#2

Hi Sven- can you post here, or send me via private message, the object before translation?

thanks,

-Pascal

#3

Here is the object before translation, thank you.

object.3dm (2.8 MB)

#4

Hi Sven- here are the coordinates of the bottommost points on the object before and after moving:

Before:
Point in world coordinates = 899.9999329,-19.3139515,4624.9980469

After:
Point in world coordinates = 899.9999329,-19.3139515,-0.0019531

and the topmost points:

Before:
Point in world coordinates = 899.9999329,-19.3139515,5999.9990234

After
Point in world coordinates = 899.9999329,-19.3139515,1374.9990234

In each case, if I’m not mistaken, the Z coordinate is different by 4625… ?

I used BoundingBox to locate the top and bottom limits of the object. Does that make sense with what you see?

-Pascal

#5

Thats extra weird; my boundingbox shows the ‘right’ values:

#6

I would guess Your file tolerances are bigger than 0.001 and the Object Info box shows the rounded values.
Just a thought.
Norbert

#7

Thanks for your reply, but that’s not the case. Here is the location of the translated object: