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Below is a Peaucellier-Lipkin linkage which can transform rotational motion into a perfectly linear motion and the CAD model with final dimensions.
| 2D Motion-Gen Model | CAD Model |
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Rough Prototype
We made our rough prototype using popsicle sticks, screws, and nuts. We mounted it by holding the grounded joints to a table with clamps. We did not incorporate the crank in this iteration, and therefore ran it backward by actuating the output joint.
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For this mechanism, we chose to go with a plastic toy cocktail shaker because it was smaller and lighter. We also decided to use a press fit to decrease 3D printing material and time. In the second design, we thickened the arms to increase the structural integrity.
| Initial Design | Second Design |
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Second Design
Our second iteration of the mechanism has a crank or cam mechanism to rotate the entire linkage plate. A pivot point is needed on the edge of the linkage plate to rotate about. This is how we incorporated an angle change.
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Our team decided on a cam to move the linkage plate. Initially, we had a 14 cm diameter (~5.5 in) with a groove that would keep the bearing in line with the Cam and prevent misalignment. The cam was 3D printed and we found that it was too big, so we decided to create a 1.25 in diameter Cam that was laser cut due to time constraints.
| Initial Cam (Diameter = 14 cm) | Second Iteration of Cam (Diameter = 1.25 in) |
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