Positioning errors detection and identification for A/C axes bi-rotary milling head based on laser interferometer

A/C axes bi-rotary milling head is one of the most important functional components of middle and large dimensional five-axis machining centers.The errors of A/C axes bi-rotary milling head are studied including two positioning errors,three dimensional errors and three angular errors.Then detection and compensation of three dimensional errors and three angular errors are studied as well.And two positioning errors of A/C axes bi-rotary milling head are measured by using Renishaw laser interferometer and tested by RX10 Reference rotary indexer,at the same time the working principle of Resishaw rotor measuring system is introduced,in which detection methods for A axis and C axis positioning errors are illuminated in detail.