This paper describes a novel method to improve the accuracy of industrial robot by calibration technique. Robot calibration is broadly classified into model-based and modeless techniques. In this paper, a modeless technique capable of interpolating the deviation along the Z-axis is defined which doesn’t consider any kinematic model, instead adapts interpolation method to compensate errors. The robot’s deviation is measured with a laser tracker and the deviation controlling parameters are calculated. The controlling parameters interpolate the deviation and with an online compensation program this deviation is compensated in real time scenario. This modeless technique is experimentally tested and it demonstrates a substantial improvement in the accuracy of the robot.
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