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of actual production-customer specifications and on-site safe- ty regulations at all times. The Fraunhofer Institute contributed its knowledge derived from many years of research as well as its experience in camera systems and software. An important breakthrough occurred with the object recognition system. The 3D laser scanner precisely recognizes the components for picking. Outside light of any type in the production building has zero effect on the ability to pick a part. It will even recognize black, brown and rusty parts. The accompanying software segments identify and select informa- tion about items and constraints in the bin provided. Specially developed grippers with additional axes enable collision-free access and the removal of items from the con- tainer, and subsequently allows for precise positioning of the item into a fixture or pallet.
The mobility of the human “gripping apparatus” can- not be completely copied, but can be adequately mimicked. For maximum precision, the component in the mechanical
Object identification is greatly aided by the 3D laser scanner, which precisely recognizes the components for picking regardless of light in the production area.
gripper is aligned through an in-process inspection method accurate to a tenth of a millimeter. In cases of gripping failure, the system continues with minimal delay due to a special automatic correction strategy.
With 40 years of automation technology experience, Lieb- herr has achieved bin-picking process reliability for a variety of industrial applications that otherwise have only been possible under laboratory conditions. “This is only possible by com-
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ManufacturingEngineeringMedia.com | July 2013
Image courtesy Liebherr Verzahntechnik GmbH
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