Hexapod robot is a robot that has six legs. Hexapod robot is used for through steep terrain or rocky areas. Wheeled robots can’t pass through the rocky and steep area. Therefore hexapod robot designed to replace wheeled robots in this area. Hexapod robot inspired by spider legs. Six feet make a robot stable and has a smooth movement. The movement of the robot will be smoother if more joints on the robot.
Each robot joints filled by a servo motor. Servo motor allows a movement like a joint in humans or animals. However, in general, the servo will only make one-way direction movement (right-left). So if you are going to make a four-way movement (right-left-front-back) then it must be made of two joints.
In general, a hexapod robot has three joints on each leg. So you need eighteen servo to make a hexapod robot.
Now many companies that sell body hexapod robot. So you do not have to bother making mechanics. Part of the body of the robot is shown in the image above. There are five different robot parts. To make a joint, you can use a servo Tower Pro SG90 as used in the hexapod robot in the picture No. 1. But the selection of servo should be tailored to the needs of torque. If the load of the robot is heavy, then you should use a servo with greater torque.