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The robotic arm is one of the most important applications of technology in the modern world. From the industrial production plants to the homes of everyday laborers, robotic arms are used for a variety of purposes. They automate the production process and increase efficiency. The working principle of a robotic arm is based on a series of sensors, controllers and motors. The sensors detect input from environment and the controllers are programmed to direct the motors accordingly.

The robotic arm is a 3-axis robotic manipulator with multiple degrees of freedom. It consists of a series of rigid segments, each connected to its predecessor by a revolute joint. A typical robotic arm consists of five or more rigid segments called links, connected by articulated joints. The links and joints work together according to a programmed algorithm, to form a motion system.

The three primary degrees of freedom for a robotic arm are termed the Cartesian coordinates - x,y and z. Three additional degrees of freedom are used to control its orientation. They are termed rotary joints - pitch, roll and yaw. These angles, when combined, can accurately and precisely move the robotic arm.

The applications of robotic arms are endless. They are often used in production lines to assemble components and package goods. Robotic arms are also used in healthcare to perform surgeries and other medical procedures. They are being used increasingly in fields such as space exploration, defense, construction, agriculture and a number of other industries. In addition, they are used in many studies involving human-machine interfaces.

Robotic arms employ the use of vision systems, force-sensing systems and multiple sensors for added accuracy. Vision systems involve the use of cameras, which track the motion of the robot and transmit data back to the base computer. Force-sensing systems measure and monitor the force of the robot arm and give the operator the necessary information. Sensors are also used to detect the position and orientation of the robot, which is necessary for accurate movement.

In conclusion, robotic arms and their many applications are essential for the modern world. They are used in a variety of industries, from industrial production to healthcare, and are becoming increasingly indispensable. The working principle of robotic arms involve a series of sensors, controllers and motors, all working together according to programmed algorithms. The senses provide the data, the controllers process the data and the motors move the robotic arm. This combination of technologies is what makes robotic arms so reliable and accurate.