How to rate symmetry

1. How is symmetry measured?
2. What is symmetry technique?
3. What is the difference between concentricity and symmetry?

How is symmetry measured?

Usually, to measure symmetry, a CMM is set up to calculate the theoretical midpoint datum plane, measure the surfaces of both required surfaces, and then determine where the midpoints lie in reference to the datum plane. This is a complex and sometimes inaccurate method for determining if a part is symmetrical.

What is symmetry technique?

Symmetry is a great technique in photography, it will clean up your compositions and can make the most mundane things look fantastic! Symmetry in photography is achieved when two halves of an image hold the same weight and give a perfect balance between two sides of your photograph.

What is the difference between concentricity and symmetry?

The concentricity tolerance is often used to accurately control balance for high-speed rotating parts. Symmetry is that condition where the median points of all opposed or correspondingly located points of two or more feature surfaces are congruent with the axis or center plane of a datum feature.