Estimation of kinematic errors of rotary axis with wide indexing range

Since compensation for rotation centers is insufficient for accurate 5-axis manufacturing, compensation for kinematic errors of the rotary axis is demanded. Although touch trigger probes are widely used, interference with other components often limits their measurement range and accuracy. This article proposes a method to identify kinematic parameters for the entire stroke of the swiveling axis at once from a measured dataset taken at different measurement locations depending on the indexing angle of the swiveling axis. The proposed method is experimentally evaluated on a horizontal 5-axis machining center.