Credits

['Reagan', 'ZS', 'Paco', 'Felix']

Sample Learning Goals

Project 10: Cam and follower EJS Simulation: Cam with Different Shapes and Offsets by Reagan and ZS

Exploring the EJS Simulation: Cam with Different Shapes and Offsets

Link

During a recent workshop on educational technology, Reagan and ZS had the opportunity to develop an EJS (Easy Java Simulations) model titled "Cam with Different Shapes and Offsets Rotating Simulation." This interactive simulation is designed to help students and enthusiasts understand how cams of various shapes can affect the motion of a follower pin. In this blog post, I will delve into the details of the simulation, discuss its scientific accuracy, and explore how it visually demonstrates mechanical principles.

Overview of the Simulation

The simulation features a graphical representation of a cam mechanism with an adjustable follower pin. Users can select different cam shapes, adjust the offset, and observe the resulting motion of the follower as the cam rotates. The primary focus of the simulation is to showcase how the geometry of the cam influences the displacement and trajectory of the follower pin.

Key Features

1. Cam Shapes: The simulation includes various cam shapes, such as elliptical, pear-shaped, and circular cams, each with distinct characteristics affecting follower motion.

2. Offset Adjustment: Users can modify the offset of the cam, altering the initial position of the follower pin relative to the cam's rotation axis. This feature allows exploration of how offsets influence the cam mechanism's behavior.

3. Dynamic Visualization: As the cam rotates, the simulation dynamically updates the displacement graph, displaying the follower pin's displacement over a full 360-degree rotation.

Scientific Accuracy of the Model

The EJS simulation is built on a robust scientific foundation, accurately representing the mechanical interactions between the cam and follower. Here are some key aspects of the model's scientific accuracy:

1. Geometric Precision: The model incorporates precise geometric calculations to ensure that the follower pin accurately traces the curvature of the cam. The mathematical representation of each cam shape is carefully defined, allowing the simulation to produce realistic motion paths.

2. Displacement Calculation: The displacement graph accurately plots the follower pin's displacement as a function of the cam's rotation angle. This provides users with valuable insights into how different cam shapes and offsets affect the follower's trajectory.

3. Rotation Dynamics: The simulation accounts for the cam's rotation angle and speed, allowing users to observe how these factors influence the follower's motion. The model captures the intricate relationship between rotation dynamics and follower displacement.

Educational Value

This simulation serves as an excellent educational tool for students studying mechanical engineering, physics, or related fields. It offers a hands-on learning experience, allowing users to experiment with different cam configurations and observe the resulting effects on follower motion. By visualizing the impact of cam shape and offset, students can gain a deeper understanding of the principles governing cam mechanisms.

Conclusion

The "Cam with Different Shapes and Offsets Rotating Simulation" is a testament to the power of interactive simulations in education. By accurately modeling the behavior of cam mechanisms, this EJS simulation provides a valuable platform for exploring the complex dynamics of cams and followers. Whether you're a student, educator, or enthusiast, this simulation offers an engaging and informative experience that enhances your understanding of mechanical systems.

Feel free to explore the simulation and share your thoughts or questions in the comments below!

For Teachers

20240718-24 Web EJS beta Workshop by Francisco Esquembre and Félix J. García Clemente supported by MOE CPDD1 Registration for Web EJS Workshop (18-24 July 2024)

Research

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Video

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 Version:

1. https://weelookang.blogspot.com/2024/03/20240718-24-web-ejs-beta-workshop-by.html?m=1
2. https://weelookang.blogspot.com/2024/08/project-10-cam-and-follower-ejs.html

Other Resources

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