I'm wondering if somebody could explain the 4 position method a bit more understandably. I am trying to follow the explanation in here. What I fail to understand is how does the actual fourbar linkage in this case look like?
Image 1: Situation described.
From the image and description I gather that:
- F is one of the ground joints (pink)
- The pink Circle is length of that link (link 3)
- P23 and P'23 are location of next link joint, and thus the length of that link is F to P'23 minus the pink circles radius (link3)
However what I don't understand from the description is where the other ground joint is. Does it happen to be M'? But that seems awfully short when looking at the demonstration piece? What about P13?