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To improve both production quality and capacity, CNC machine tools must have high-accuracy and high-speed machining abilities regarding manufacture of mechanical parts. However, CNC machine tool operators experience difficulty in handling the complicated settings of control parameters, which are usually enabled in advanced servomotor drivers. Therefore, a tuning method is developed in this study to determine the best-fitting control gains for a five-axis CNC machine tool using the measurement data acquired during tests of inclined circular motions in the workspace. Rates of improvement higher than 80% were achieved after using the proposed method to tune the control gains of each motion axis.

Tuning of Servo Control Gains for Five-Axis CNC Machine Tools Considering Circularity of Inclined Circular Motions in Workspace