Instantaneous centre of lock jaw pliers (4 bar link)

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The discussion focuses on plotting the instantaneous center of lock jaw pliers using a four-bar link mechanism. Participants seek clarification on the definition and location of the instantaneous center, with one member requesting a visual representation to better understand the concept. There is confusion regarding which parts of the pliers are assumed to be stationary, with the upper handle suggested as fixed. A red line is used to illustrate the instantaneous center of zero velocity at various positions during the pliers' movement. Overall, the conversation highlights the need for clearer definitions and visual aids to facilitate understanding of the mechanism's movement.
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trying to plot the movement of the instantaneous centre of lock jaw pliers

first image is an example of the 4 bar link and the second is a sketch which I've drawn of what i think it would be. is this the only instantaneous centre?
lock_jaw_pliers_assembly_image.jpg
lock jaw pliers.png
 
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Perhaps it is clear to everyone else, but I have no idea WHAT center you are talking about. Can you draw a red dot on your first image showing where the "center" is that you mean? Also, what part(s) do you assume are not moving? It could be the upper or the lower handle sections (I assume it's the upper section but without saying, your problem is ill defined).
 
the instantaneous centre of zero velocity(sorry should of mentioned that)

the red line is connecting the dots of the instantaneous centre of zero velocity at five positions through the movement of the pliers

the top link (top handle) is fixed in my example

dose this clear it up?

Thank you :)
 
liamke70 said:
the instantaneous centre of zero velocity(sorry should of mentioned that)
I don't know what that means.
 

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