Cylindrical Coordinate Systems

Cylindrical coordinate systems are used to measure round features.

How you set up a deflection plot with a cylindrical coordinate system depends on the model. The deflection plot must have zero radial deflection in the center of the round feature, by using an anchor or a Local Coordinate system.

To use a cylindrical coordinate system, define the Local Coordinate system in the center of the feature with the Z-axis in the direction of the axis of the circular feature. Best fit using selected nodes on the perimeter of the hole is used to define the center of the hole.

(A) = Anchor in the center of the round feature with a cylindrical coordinate system

(B) = Local coordinate system defining the center of the hole

(C) = Best fit used with nodes on the perimeter of the hole to define cylindrical coordinate system around the local coordinate system