Your cell layout should be designed in such a way that everything is easily within reach of the robot, as defined by its specifications. The closer everything is, the less the robot will have to move around the cell.
4. Optimal use of the robot’s workspace
Another thing to optimize is the robot’s workspace.
For instance, consider which parts of the robot’s workspace are used for manipulation tasks, because some areas are better than others. Your goal should be to move any high-manipulability tasks (e.g., assembly) to areas of the workspace where the robot is most dexterous.
Researchers Izui et al from Kyoto University in Japan explain that manipulability is “a quantitative measure of the manipulating ability of robot arms.” A point with high manipulability can be reached from many different orientations. A point with low manipulability can only be reached by one or two orientations.
In general, high-manipulability areas are located in the center of the robot’s workspace. Low-manipulability areas tend to be concentrated around the edges of the workspace, near the robot’s body, and around singularities. Keep those things in mind when evaluating your robot’s workspace.
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5. Neat and tidy
The workspace should be clean and organized. As Benjamin Franklin said, there should be “a place for everything, and everything in its place.”
Untidy cells are a sign of inefficiency. This is related to one of the core principles from the 5S Approach to Lean manufacturing. In this context, tidiness doesn’t just mean keeping the cell free from dirt; it means having clear systems in place to keep the cell working most efficiently.
6. Lean outputs and inputs
The outputs and inputs of the robotic cell should have precisely defined locations within the workspace.
According to the Lean Robotics framework, which guides you through the process of designing a robot cell, one of the first steps is to clearly define the cell’s outputs. In terms of layout, you should decide where the outgoing objects will be located in the cell, and how they’ll be transported from the robotic cell to the next stage in your manufacturing process.
The next step is defining the cell’s inputs. In terms of layout design, you should decide where incoming objects will be placed and how they’ll be presented to the robot. Typical part presentation methods include matrices, trays, conveyors, and unordered bins.
For a step-by-step guide to designing a robotic cell, check out the Lean Robotics book at leanrobotics.org.
This article was republished with permission from Robotiq.