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Researchers Make Robots fit for Picking with Digital Twins

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Resource-Efficient Robot Development with Digital Twin

The system in question is the "GenesysLine" robot by Premium Robotics, as shown in Image 1. It is designed to automate complex logistics processes. The robotic system is a complete in-house development, based on both standard components (linear and rotational guides, drives, and control components) and custom structural elements. The consistent application of lightweight principles plays an important role throughout the entire engineering process. The resource savings in the manufacturing process of the robots and their later operation using the digital twin promise significant improvement potential compared to development without the digital twin. Furthermore, this enables the dynamics of the robot movements to be increased by reducing the mass of the components to be accelerated.

Precisely Positioned Robot Works Flawlessly

Dealing with the associated loss of stiffness as well as the occurrence of elastic effects and compliance is essential to ensure error-free system operation through the precise positioning of the robot. The precise positioning of the gripper is crucial, especially when picking load carriers (such as pallets) that are composed of various individual items with partially high article weights. The consequences of incorrect positioning range from damage to the items to the costly downtime of the entire system.

Two Important Components of the new Robot

The robotic system considered here also represents a connected and modular solution that helps alleviate the strained labor market in the logistics industry. The staff is relieved, as intended, in handling heavy items. Furthermore, manual repacking performance on packaging units is increased because employees can focus on the remaining, lighter range of items. The robotic system essentially consists of two independently operating platforms. They operate within a gantry device that can be positioned using a lifting mechanism with a belt drive.

Image 2: A special feature and one of the key components of the novel picking robot is the so-called roller gripper with its flexible telescopic rail construction.(Image: Premium Robotics)
Image 2: A special feature and one of the key components of the novel picking robot is the so-called roller gripper with its flexible telescopic rail construction.
(Image: Premium Robotics)

The upper kinematics operates with a 3D camera system as a key component of the robotic system to uniquely identify the individual items on the pick-up pallet. Based on the detected position coordinates, the individual items are picked up and positioned on the drop-off pallet by the so-called wrap gripper mounted on the lower kinematics. The unique gripping technique of the wrap gripper represents the second essential key component of the robotic system (Image 2). The flexible handling of a wide variety of item types is enabled by controlling the force applied to the package and the reliable positioning of the TCP.

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