- #1
roldy
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Obtaining the Equation of a Path
I'm working on a project for myself in SolidWorks which involves a scissor-type mechanism. The bottom ends of the linkages are attached to disks that are free to rotate around the central hub where all the gears are attached. On the other side of the hub is another ring gear and pinion gear to reverse the motion of one of the disks. I need to be able to figure out the parametric equations that describes the curve that is shown in the animation. In SolidWorks I am able to use this curve in a part. Problem is that the curve is not exact since it depends entirely on the number of data points you want to represent the curve.
The only knowns are the rotation angle that the disks on the hub make, the pivot to pivot hole distance on the linkages, and the initial distance from the top pivot hole of the linkage to the hub center, the initial angle of the disk with respect to the hub (measured from a line drawn from the hub center - bottom linkage pivot hole to the vertical axis.
Sorry about the video quality, it's youtube's fault.
https://www.youtube.com/watch?v=T2O1-gU-vnY&feature=youtu.be
I'm working on a project for myself in SolidWorks which involves a scissor-type mechanism. The bottom ends of the linkages are attached to disks that are free to rotate around the central hub where all the gears are attached. On the other side of the hub is another ring gear and pinion gear to reverse the motion of one of the disks. I need to be able to figure out the parametric equations that describes the curve that is shown in the animation. In SolidWorks I am able to use this curve in a part. Problem is that the curve is not exact since it depends entirely on the number of data points you want to represent the curve.
The only knowns are the rotation angle that the disks on the hub make, the pivot to pivot hole distance on the linkages, and the initial distance from the top pivot hole of the linkage to the hub center, the initial angle of the disk with respect to the hub (measured from a line drawn from the hub center - bottom linkage pivot hole to the vertical axis.
Sorry about the video quality, it's youtube's fault.
https://www.youtube.com/watch?v=T2O1-gU-vnY&feature=youtu.be
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