Which attribute of cross-dial alignment improves geometrical accuracy?

The correct attribute of cross-dial alignment that improves geometrical accuracy is the fact that no face readings are needed. In cross-dial alignment techniques, the measurement of misalignment is taken by using dial indicators positioned at different points along the shafts. By avoiding face readings, the alignment process minimizes errors associated with reading both the face and the edges of coupling flanges, which can introduce inaccuracies due to human error or adjustments in the measuring technique.

This method focuses on direct shaft-to-shaft alignment without the complications that can arise from reading taper or wear on couplings. The lack of face readings allows for a more straightforward measurement, which enhances the overall geometric accuracy of the alignment process. Implementing this technique ensures that the measurements reflect the true alignment conditions more reliably, contributing to improved machinery performance and longevity.