QD12-09-C Angular Positioning Accuracy

The angular position deviations are determined by comparing the actual position of the rotary table with the nominal angles defined by a calibrated angle gauge.

A 12-sided polygon is aligned and fastened to the axis to be measured. An auto Collimator is then aligned with the polygon. From a common zero point the rotary axis to be inspected is rotated at 30° intervals and the error recorded at each position.