Thingiverse
Complex Barrel Cam Shape Drawing Machine
von DaveMakesStuff
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The “Complex Barrel Cam Shape Drawing Machine” is an advanced project that demonstrates the mechanical potential of barrel cams to encode and generate complex movements. Included here are files to make barrel cams for a circle, square, infinity sign and star.
See here for video: https://youtu.be/DdSJuxJodQM
The barrel cams are designed by plotting shapes from an xy plane onto a cylinder. Movement in the x direction is plotted helically along the length of the cylinder. Movement in the y direction is plotted along the radius of the sphere. When the cylinder is rotated, the follower and piston reproduce the shape back onto the xy plane.
Here are the parts you will need to print:
Print one of each “Base,” Crank,” and “Crank Connector.” These are all straight forward prints.
The “Print Surface Stand” is optional. It raises the printing surface bringing the pen closer to the paper and reduces the amount of error caused by a wiggly pen.
Print one or both of the “Followers.
See here for video: https://youtu.be/DdSJuxJodQM
The barrel cams are designed by plotting shapes from an xy plane onto a cylinder. Movement in the x direction is plotted helically along the length of the cylinder. Movement in the y direction is plotted along the radius of the sphere. When the cylinder is rotated, the follower and piston reproduce the shape back onto the xy plane.
Here are the parts you will need to print:
Print one of each “Base,” Crank,” and “Crank Connector.” These are all straight forward prints.
The “Print Surface Stand” is optional. It raises the printing surface bringing the pen closer to the paper and reduces the amount of error caused by a wiggly pen.
Print one or both of the “Followers.
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