I am working on a school project where I have to choose a mechanical motion device and create a 3D model of it.

I have chosen https://507movements.com/mm_090.html because it seems adequate for my modeling skills. However, I am unable to find any approach for designing such type of device.

I am an electrical engineer and this is completely out of my branch. Are the any design equations that would provide me basic set of dimensions? I would be also glad for any book recommendation on this topic.


1 Answer 1


enter image description here

Figure 1. A Scotch yoke mechanism. The blue part rotates around the small circle. The red part oscillates left and right with simple harmonic-motion.

The side to side oscillation of the red part will be 2 × e. (e is the eccentricity of the cam relative to the shaft.)

The slot in the yoke needs to have a linear dimension between the top and bottom arc centres = 2 × e.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.