Quote Originally Posted by vargai View Post
any CNC producer can be happy with this. I am just wonder how did you measured this 0,001 mm?
I didn't measure this directly. It's based on a difference in heights of rail of 1mm and a rail spacing of 1m. Looking at the hiwin catalogue, I think they say that the bearing blocks can tolerate a slight rotation around the rail, and a height difference of 0.26mm (20mm rail, 1m spacing). This is a lot more than the figure that Silyavski has given, but I might have misunderstood something.