Thermal Calibration of a 3 DOF Ultra High-Precision Robot Operating in Industrial Environment

While dealing with sub-micrometer precision robots, thermal expansion is the most significant source of inaccuracy. Thermal variations in the environment, in the robot parts and in the frame change the robot geometry, lowering the robot precision. In this article we propose a strategy to model and compensate such effects. The thermal behavior of a 3 DOF (Degree(s)-of-freedom) parallel robot has been studied using a high-precision measuring system. A model of the robot thermal behavior has been built and implemented in the controller. By using it, thermal deformations are compensated in real-time and an absolute accuracy of ±71 nm has been reached.


Published in:
Proceeding of the 2010 IEEE International Conference on Robotics and Automation, 3692-3697
Presented at:
2010 IEEE International Conference on Robotics and Automation, Anchorage, Alaska, USA, 3-8 May 2010
Year:
2010
Publisher:
IEEE
ISBN:
978-1-4244-5040-4
Keywords:
Laboratories:




 Record created 2010-05-17, last modified 2018-01-28

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