It depends on what kind of robot you are talking about.
cats
Study which deals with the construction and components of a robot. (It deals with the components such as wrist, arm, joints and body).
A scara robot uaually have 4 degrees of freedom
In robotics, joint space refers to the configuration space that represents all possible positions and orientations of a robot's joints. Each point in joint space corresponds to a specific arrangement of the robot's joints, enabling precise control of its movement and posture. Manipulating joint space allows for the planning and execution of complex motions, making it a fundamental concept in robotic kinematics and control.
I will guess: bearings. the more fluid the motion, the less friction. or the joint could be a silicon soft plastic type that flex and allow fluid like motion while maintaining strength.
In a robot there is a joint where ever you put a motor that will move the metal/plastic "bones" of the robot so you can have as many joints as you like. Source: My Brain
cats
However many the designer wants it to have.
Study which deals with the construction and components of a robot. (It deals with the components such as wrist, arm, joints and body).
The same number as a car driven by a person. The precise number would depend on the make and model of the car.
Stationary Robots. These are robot that are fixed in position. They tend to have robot arms that can move about. The diagram below shows a large-scale stationary robot arm. It has mobile joints called 'the wrist', 'the elbow', 'the waist' and 'the shoulder'.
elbow neck shoulder feet knee finger nose
The future of robot joints is likely to focus on bio-inspired designs, utilizing soft robotics for greater flexibility and adaptability. Advances in materials science, such as smart materials and soft actuators, will enable joints that mimic human movement more closely. Furthermore, the integration of artificial intelligence will enhance the coordination and functionality of these joints, allowing robots to perform complex tasks in dynamic environments. Overall, the future of robot joints will emphasize agility, efficiency, and collaboration with humans.
The Complete Robot has 688 pages.
The number of batteries needed to power a robot will depend on the design of the specific robot.
200 joints
It has 3 joints.