Exploring the Cam Mechanism: Questions & Answers

  • Thread starter Tung Jian Seng
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In summary, "Exploring the Cam Mechanism: Questions & Answers" delves into the principles and applications of cam mechanisms in mechanical systems. It addresses common inquiries regarding their design, functionality, and the types of cam profiles used in various machines. The content also highlights the advantages of cam mechanisms, such as precise motion control and versatility, while discussing potential challenges and considerations in their implementation. Overall, the piece serves as a comprehensive resource for understanding the fundamental aspects of cam mechanisms and their significance in engineering.
  • #1
Tung Jian Seng
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TL;DR Summary
I wanna know how to calculate to select the right motor for my cam mechanism
Hi guys, I'm a 2nd year mechanical engineering student here. I'm currently exploring the cam mechanism and I find it interesting. But when I see the videos, I have some questions that came up in my mind. Here is the illustration below..
1696861035359.png

This is a top view. In this case, the cam plate is mounted on a linear guide block, and the block is driven by the motor, when the motor rotates, the block will be moving forward and backward. So here are the questions below:

1. How should I know if my motor is suitable or not?
2. It would depend on the mass of the cam plate which is the load to the motor right?
3. Is it correct that when the motor is rotating, it actually doesn't have to withstand the load of the cam plate as it is already on a frictionless slider?
4. I think what matters to the motor is the inertia force caused by the mass of the cam plate and linear guide block, but how can I calculate it to select the right motor for my application?

I would really appreciate it if someone could help to clear my doubt
Thank you in advance!
 
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  • #3
What is the usefulness of the mechanism if the only load on the motor is the sliding cam plate?
Normally, you need to alternately move something else, which is the main load.
 
  • #4
The item labelled 'cam folower' could be a cam but how is it driven? Is there a bit off three dimensional sketching here. I agree, it looks more like a scotch yoke but put in the wrong place.

Has the OP seen actual images of working cam mechanisms? Google could be his / her friend here.
 

FAQ: Exploring the Cam Mechanism: Questions & Answers

What is a cam mechanism and how does it work?

A cam mechanism is a mechanical device that converts rotational motion into linear motion or vice versa. It consists of a cam, which is a specially shaped rotating element, and a follower, which is a component that moves in response to the cam's shape. As the cam rotates, its profile pushes the follower in a specific pattern, creating the desired motion.

What are the different types of cams and followers?

There are several types of cams, including disk cams, cylindrical cams, and linear cams. Disk cams are the most common and have a flat, circular shape. Cylindrical cams have a cylindrical shape and a groove or track that guides the follower. Linear cams are flat and move in a straight line. Followers can be classified based on their shape and motion, such as knife-edge followers, roller followers, and flat-faced followers.

What are the applications of cam mechanisms?

Cam mechanisms are widely used in various applications, including internal combustion engines, automated machinery, textile machines, and robotics. In engines, cams control the opening and closing of valves. In automated machinery, cams are used to achieve precise and repeatable movements. In textile machines, cams control the movement of needles and other components. In robotics, cams can be used to produce complex movements and functions.

How do you design a cam profile?

Designing a cam profile involves determining the desired motion of the follower and then creating a cam shape that will produce that motion. This typically involves mathematical calculations and the use of software tools. Key considerations include the type of motion (e.g., uniform, harmonic, or cycloidal), the duration of the motion, and the physical constraints of the system. The cam profile must be smooth and continuous to ensure proper operation and minimize wear and tear on the components.

What are the advantages and disadvantages of cam mechanisms?

Advantages of cam mechanisms include their ability to produce precise and repeatable movements, their versatility in creating complex motion patterns, and their relatively simple construction. Disadvantages include the potential for wear and tear due to friction between the cam and follower, the need for precise manufacturing and alignment, and the limitations on the speed and load capacity of the mechanism. Proper lubrication and maintenance are essential to mitigate some of these disadvantages.

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