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How does an industrial robot’s mechanical arm perform factory tasks?
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At the top of the machine is a stack of punched cards that would be fed into the loom to control the weaving pattern. This method of automatically issuing machine instructions was employed by computers well into the 20th century.
An industrial robot’s mechanical arm performs factory tasks through a combination of structural design, programmed control, and specialized end-effectors. The arm is composed of a sequence of rigid links connected by movable joints, which allow for precise positioning and orientation within the robot's work space.1
The operation of the arm relies on several key components:
- Mechanical Structure: The arm-and-body section moves and positions parts or tools, while the wrist section provides the necessary orientation at the work location.1
- Actuators: These function as the robot’s "muscles," converting energy from a power supply into physical motion at the joints.2
- Control System: A computer system directs these motions based on programmed instructions. Robots are taught tasks either through lead-through programming—where the arm is physically moved through a sequence—or by using specialized programming languages that define motion paths and coordinate with other factory equipment.3
- End-Effectors: A gripper or tool (such as a welding gun or spray-painting nozzle) is attached to the wrist to interact with the environment, allowing the robot to grasp parts, perform processing operations, or conduct inspections.14