KINEMATIC MODELING AND SIMULATION OF SPINDLE ERRORS IN A MINIATURIZED MACHINE TOOL
Keywords:
Kinematic Model, Spindle Error Motions, SimulationAbstract
Spindle rotation accuracy is one of the important items that affect the machining performance of a miniaturized machine tool. Capacitive sensor based measurement technique is commonly used for evaluating error motions of machine tool spindle using a master cylinder. This paper presents a kinematic model for analyzing error motions of miniaturized machine tool spindle. Principles of rigid body kinematics and homogeneous transformation matrices are used for developing the model. In the present work, fourier series is used for modeling the synchronous components of spindle error motion and form error of master cylinder. Asynchronous spindle error motion is characterized using normal probability distribution. Spindle radial error data of a miniaturized machine tool is simulated using the proposed model and compared with experimental results. Simulation results proved that the proposed model is useful in accurate interpretation and analysis of spindle error measurement
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