Iván Hernández Dalas: High-precision robots: What to do when absolute accuracy is poor?
With top equipment and years of experience, Fraunhofer IPA gets to the root causes of inaccurate robot operation. Source: Rainer Bez, Fraunhofer IPA Robots are almost always highly repeatable. Absolute accuracy, on the other hand, often leaves something to be desired. A team at the Fraunhofer Institute for Manufacturing Engineering and Automation IPA is uncovering the reasons for this and helping companies to achieve more efficient robot systems. Repeatability and absolute accuracy are established parameters for assessing the quality and precision with which a robot performs a specific task. If a robot performs a specific task many times with almost identical results, this demonstrates very good repeatability. Many industrial robots achieve values in the range of 0.1 mm or better. In contrast, absolute accuracy describes how accurately a robot’s spatial coordinates are achieved in relation to its base system, regardless of previous movements. And here, there is often still room f...