Machining, Measurement, and Control Laboratory

Machining Tests to Identify Kinematic Errors on Five-axis Machine Tools
Takeyuki Iritani, Soichi Ibaraki, Masahiro Sawada, Tetsuya Matsushita

This paper proposes a set of machining tests for a five-axis machine tool to identify its kinematic errors, one of its most fundamental error sources. In each machining pattern, a simple side-cutting along a straight path using a straight end mill is performed. The relationship between geometric errors of the finished workpiece and the machine’s kinematic errors is formulated based on the kinematic model of a five-axis machine. The identification of kinematic errors from geometric errors of finished workpiece is experimentally demonstrated on a commercial five-axis machining center, and the estimates are compared to those estimated based on ball bar measurements.
Key Words: Five-axis machine tools, machining test, kinematic errors, measurement