Abstract
This article proposes a volumetric error generalized model and a distributed error compensation technique for multi-machine tools. A detailed generalized kinematic model for three- and five-axis machine tools is built. It can be applied to 4 types of three-axis machine tools and 12 types of five-axis machine tools. By simply inputting the translational and rotary type numbers of the specific machine tool, the final kinematic model can be obtained without further human interventions. A new compensation technique based on an Ethernet distributed numerical control system is proposed. Ethernet distributed numerical control software integrated with the generalized kinematic model is developed for machine tools with Fanuc and Siemens systems. Based on the Ethernet distributed numerical control system, the real-time volumetric errors of multi-machine tools are simultaneously compensated for. The proposed generalized kinematic model and Ethernet distributed numerical control systems are experimentally verified on three machine tools, whose volumetric errors are significantly reduced after compensation.
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