Okuma's Intelligent Technology: 5-Axis Auto Tuning (2015)

https://www.okuma.com/5-axis-auto-tuning
Five-axis machining accuracy is greatly affected by rotary axis misalignment and other "geometric errors." Okuma's 5-Axis Auto Tuning System measures geometric error using a touch probe and datum sphere, and performs compensation using the measured results to tune motion accuracy on 5-axis machines. In this way 5-axis machining accuracy on a higher level is achieved.

Previously, manual measurements of the indexing center were bothersome and time-consuming, but with the 5-Axis Auto Tuning System the measurements are made automatically by the machine. Measurements can therefore be done with stable accuracy in a short time by anyone. In addition, the results of tuning are applied regardless of whether the operation is in auto, manual, or MDI and whether Tool Center Point Control is on or off. Setup and machining can therefore be done with the same operations as before.