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Experiment setup based on sequential multilateration method.

Experiment setup based on sequential multilateration method.

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Structure of an XFYZBA type 5-axis machine tool
Volumetric error defined in the W-TCS
Flowchart of the proposed compensation method
Comparison of different compensation methods
+3 Experiment setup based on sequential multilateration method.
Efficient compensation method of 5-axis machine tools based on a novel representation of the volumetric error
Article
Full-text available
  • Mar 2023
Geometric error compensation is important in improving the machining accuracy of five-axis machine tools. To improve the efficiency of real-time compensation, this paper proposes a novel compensation method based on a novel representation of the volumetric error. First, 5 error parameters in the workpiece-tool coordinate system are employed to desc...
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Position-independent geometric error compensation of a non-orthogonal five-axis machine tool using a simplified algebraic algorithm
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  • Nov 2023
  • P I MECH ENG B-J ENG
Geometric errors are the key error sources that affect the machining quality of a five-axis machine tool. In the case of a non-orthogonal five-axis machine tool (NOFAMT), the modelling and compensation of geometric errors can be quite complex. This paper proposes a simplified modelling algorithm to derive the analytical expressions for the position-independent geometric error (PIGE) compensation of a NOFAMT without generating higher-order error terms. First, the geometric error modelling was conducted based on the homogeneous transformation matrix (HTM). Then, algebraic expressions for PIGE compensation were obtained according to the actual inverse kinematics and a simplified algorithm. By using the simplified algorithm, the efficiency of deriving algebraic expressions for geometric error compensation can be greatly enhanced. The PIGE compensation’s numerical control (NC) codes can be directly computed using these algebraic expressions. Finally, the effectiveness and efficiency of the new algorithm were verified by numerical analysis and virtual machining. The detailed results were compared with those obtained using the differential method, and both sets of results showed the same trend.
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