A “circle form test” can also be performed with the control. The actual and nominal values, as well as the circle center point, of two selected axes are recorded while a circular path is traversed.
The curves are combined as pairs in the display, and the differences between the actual and nominal values are shown with a magnification factor as an X/Y graph along the nominal value circle. The nominal value circle is based on the coordinate origin, meaning that it is independent of the actual circle center point.
Regardless of the program options that have been set, a fixed grid with axes to the same scale is always used for this graph. In addition, circles around the coordinate origin are shown.
The Evaluation > X/t Graph command additionally creates an X/t graph.
Keep in mind that you can only use TNCscope to view circle-form-test files. It is not possible to directly record the circle form test with TNCscope.