Can You Build A Klann Mechanism Spider Robot With Strawbees?

Objective:

Design and build a six-legged spider robot using Strawbees robotics kits and incorporating a Klann mechanism for efficient movement.

Materials:

• Strawbees STEAM Classroom or Starter with Micro Bit Bundle
• Possible additional materials, as determined by students (ie: rubber bands or gears) – this is optional.
• Video for examples
• Engineering & Reflection Sheet

Instructions:

• Introduction to Klann Mechanism:
  • Explain the concept of a Klann mechanism to the students, highlighting its importance in robotics for creating efficient leg movement similar to that of spiders.
  • Note: The Klann linkage is a planar mechanism designed to simulate the gait of a legged animal and function as a wheel replacement or leg mechanism. It consists of a frame, a crank, two grounded rockers, and two couplers, all connected by pivot joints.
  • What the videos for examples:
    • https://youtu.be/gq-2BZ_E09M?si=wAxH2rjMEd7QhP4j
    • https://youtu.be/YhG5RYCnwyA?si=iLD8jM5aYfiLFBdE

• Brainstorming and Design:
  • Divide students into teams and encourage them to brainstorm ideas for designing a six-legged spider robot using the Klann mechanism.
  • Provide them with the Engineering & Reflection Sheet to sketch their initial designs.

• Prototype Construction:
  • Once the teams have finalized their designs, provide them with the Strawbees robotics kits and other materials, as determined.
  • Instruct them to start building prototypes of their spider robots according to their designs.
  • Encourage experimentation and adjustments as they progress.

• Incorporating Klann Mechanism:
  • Guide the students in integrating the Klann mechanism into their spider robot designs. Explain the function of the mechanism in facilitating efficient leg movement.
  • Assist teams in troubleshooting any challenges they encounter while incorporating the mechanism.
• Testing and Iteration:
  • After completing the construction, allocate time to test the spider robots.
  • Set up a testing area with different surfaces and obstacles to observe how well the robots navigate.
  • Encourage teams to analyze the performance of their robots and make any necessary adjustments or improvements.
• Presentation and Reflection:
  • Each team will present their spider robot to the class, explaining their design choices and the function of the Klann mechanism and demonstrating the robot’s movement.
  • Facilitate a discussion where students reflect on their design process, challenges faced, and lessons learned.
  • Have each student utilize the Engineering & Reflection Sheet to note their challenges and reflect on their project and processes.
• Extension Activities (Optional):
  • Allow teams to compete in challenges, such as speed races or obstacle courses, to test the capabilities of their spider robots.