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8 Leg Spider Robot Using Theo Jansen Linkage
8 Leg Spider Robot Using Theo Jansen Linkage

Theo Jansen is a renowned Dutch artist best known for his Strandbeest (Dutch for beach animals). These kinetic sculptures are designed to be a fusion of art and engineering. Inspired from nature and bearing an uncanny resemblance to the movement of animals, these mechanisms are built using an array of triangles and connecting links that convert the rotation of an axle into the stepping motion of six or more limbs. Moreover, since these mechanisms mimic the movement of animals, they are far more efficient compared to wheels when operating in sand and on rough terrain.
Designed to mimic the movement of arachnids, this eight-legged spider robot builds upon the ingenuity of the Theo Jansen Mechanism. This system uses a dual motor setup paired to six gears which in turn actuate the eight legs in synchrony. Its remote-control operation enables the operator to control this robot wirelessly. This system also has four 12v LED indicator lights on either side to signal its direction of movement.

System Features:
• Uses Theo Jansen mechanism to mimic the motion of a spider
• Wheel free Movement
• Dual Motor Mechanism
• Uses 6 Gears to actuate the 8 Legs
• Wireless Remote-Controlled Operation

The spider robot makes use of a kinematic motion that is run by theo jansen linkages. This allows to turn the rotational motion of a DC motor into a step motion that mimics animals. The robot makes use of 2 x DC motors o dive the mechanism. The motors are mounted on 2 opposite sides of the robotic chassis or main frame. The drive produced by the motors are used to drive a gear which in turn is connected to 2 more hears. The 3 gears are used to drive a combination of 8 legs.

The gear movement is converted into a stepping motion by making use of jansen linkages. This linkage structure allows to provide all direction motion to the combination of 8 legs. The robot can not only move backward and forward but also turn in desired directions. The spider controller is made using a microcontroller based circuitry. The user makes use of a remote controller with 4 x Push buttons. The push buttons when pressed send a particular direction command wirelessly.

 

The receiver controller mounted on robot receives this command and sends it to microcontroller for processing. The microcontroller receives this command and uses the motor drivers to power motors in desired direction thus achieving forward backward left and right direction movement of the spider robot.

  • Compenents
  • Atmega microcontroller
  • Mini LED Lights
  • Push Buttons
  • RF Transmitter Remote
  • DC Motors
  • Gears
  • Shafts and Couplings
  • Linkages and Joints
  • Bearings
  • Robot Chassis/Body
  • Spider Legs
  • Leg Joints
  • Screws and Bolts

Top View
8 Leg Spider Robot Using Theo Jansen Linkage
Front View
8 Leg Spider Robot Using Theo Jansen Linkage
Side View
8 Leg Spider Robot Using Theo Jansen Linkage
3D View
8 Leg Spider Robot Using Theo Jansen Linkage

Crab-type robot Kim et al. has proposed a crab-type robot based on Jansen’s mechanism with the aim of solving many modern engineering problems [11]. The most useful feature of this robot is that it can easily navigate on sandy or marshy surfaces where most wheeled vehicles fail. The developers have also worked on enabling the robot to be controlled over large distances by the operator with the help of a Bluetooth module integrated into its hardware. The robot is capable of carrying out all activities assigned to it while keeping its body stable. Many applications have been suggested by the developers which the robot will be capable of doing, such as providing intelligence, searching abilities, doing surveillance and also helping in special material scattering. Also, the option of integrating GPS in the machine has been suggested by the developers. With the help of GPS it can reach the designated coordinates marked by the user and also return to the user after completing the assignment. Based on the specific application of surveillance, a coast guard type crab robot has also been proposed. The Bluetooth or RF controlled robot can operate on sandy and wet surfaces and is equipped with a vision camera which helps it to access its surroundings.

 

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