This paper presents a real-time compensation system for cutting force induced error on CNC miller. Induced errors in form of deformations for individual joints of the transmission system are identified and monitored. A force dynamometer is calibrated in reference to displacement sensors to acts as an online sensor. The Relationships between superimposed forces and corresponding deformations are established. Hence able to indirectly predict the deformations in accordance with the system embedded model. Sequentially is established by duly applying regression analysis to force-displacement data obtained from the experiments. The functional dependence of error on the on the force as prerequisite of appropriation for its relationship with cutting force is modeled. The implementation of the error compensation is done through a predetermined kinematic model that predicts the error according to the online sensor value. Finally relevant error components are disregarded by intercepting the control signal with a reverse signal equivalent to the error.

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