Question

White is the accuracy of surface straightness in angle plates?

Answer 1

They have been proven very valuable to record long term effects of surface plates. Reliable measurements with an accuracy of 0.1 μm/m demonstrate the capabilities of the method. AB - Flatness departures of surface plates are generally obtained from straightness measurements of lines on the surface.

Answer 2

Answer:

High accuracy of straightness is needed as straight planes are the basis for measurement works. Angle plates have ±0.001 mm in 25 mm length surface straightness.