Robot Anatomy

A robot joint is a mechanism that permits relative movement among parts of a robot arm. The joints of a robot are designed to permits the robot to move its end-effectors along a path from one position to another as desired. The fundamental movements needed for the desired motion of most of industrial robots are following:

Rotational Movement

This makes enables the robot to place its arm in any direction on a horizontal direction.

Radial Movement

This provides helps to the robot to move its end-effector radially to achieve distant points.

Vertical Movement       

This make enables the robot to take its end-effector to different heights.

These degrees of freedom, in combination with others or independently, explain the complete motion of the end-effector. Particular joints of the robot arm are responsible for the accomplishment of different movements. The joint movements are in synergy along the comparative motion of adjoining links. Based on the nature of this relative motion, the joints are classified as revolute or prismatic.