Hexapod Three-Legged Robot

Hexapod, as the name suggests, is ‘Hexa’ which means six, ‘pod’ meaning legs. Robots need three or more legs to walk statistically and be stable. So, Hexapod with its six legs can move easily. It contains a lot of flexibility. Even if its legs get broken or do not work, the robot will still be able to walk in any direction.

The hexapod robot doesn’t need all six legs to remain stable. Hexapod robot’s biological features are inspired from the hexapod locomotion. They’re used to examine biological concepts on insect locomotion, neurobiology, as well as motor control.

List Of Hexapod Robots

  • Hexbug
  • Rhex
  • Whegs
  • Lauron
  • Stiquito
  • Vorpal the Hexapod

Designs Of The Hexapod Robot

The designs of the Hexapod robot are different due to their leg placement. Usually, the individual legs have 2-3 degrees of distance. The feet of the robots are usually pointed out. They can also be stuffed with adhesive material so that the robot can climb on vertical surfaces such as walls. The robot also walks quickly and easily on the flat surface.


Hexapod robots are under the control of gaits. Gaits determine their movement to go forward, backward, turn, as well as step aside. Some examples of the gaits are given:

  • Quadruped
  • Crawl- it moves only one leg in a moment.
  • Alternating Tripod- it keeps three legs at a certain time on the floor.

Gaits generally remain stable for such robots. They do not get affected by rocky or rough terrain.

The movement of the legs is also not fixed in a particular motion. Their sequence keeps on changing. Also, it is selected by the computer which way the legs will follow and move. This depends on the specific environment where the robot moves.

Capers II

Capers II is a suitable example of this robot. It is developed with an elongated body structure. This provides it a more natural appearance than other robots. With its six legs, the robot can move anywhere. It has all the freedom to go in any direction.

The robot can use various gait patterns when it walks. Capers II is built with two modes. One, in which legs are placed in the ground but its body involves movements in all ranges of motion.

Inspired Biologically

Insects are used as models for the robot. Insects are typically small and so their nervous system is very simple as compared to other animals. The typical behavior of insects can be caused by some neurons. Also, the output from the motor and input from the sensors are placed at a smaller distance.

Thus, biologists can use such robots to test and try different experiments. Hexapods that are biologically inspired have a huge dependence on insects as their model. Cockroach, as well as stick insects, are two examples that are often used. Currently, not a single complete nervous system is known in the studies. Thus, several insect models are used which includes other insects.


This was all about this robot. Make sure you do not confuse it with a steward platform. You can try it for different robotic experiments.

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