3D Printed Super Ellipse
I recently saw a video on youtube about a 3d super ellipse, or 3D lame curve, and thought it would be cool to 3D print my own. I wanted my super ellipse to be clear with a design inside so I printed it on the ProJet 3510. I used the equation (x/6)^2.5+ (y/5)^2.5= 1 to make the curve. First I solved the equation for y and then graphed it using my TI-84 calculator. Then I made a table of the x and y coordinates in order to plot the curve precisely. After I plotted the points of a quarter of the ellipse, I simply connected the points, creating the desired curve. Then I mirrored the quarter curve to form a half and then revolved it to form the 3d Super ellipse.
I put another part into the ellipse and then cut away the inside part leaving an empty cavity in the middle. Since I printed it on the ProJet 3510, that uses wax for the support material, the cavity will be filled with wax. This gives the ellipse a cool trapped wax affect.
After the print was complete it was put into an oven to remove the wax support material.
Without drain holes, the wax design in the center will remain wax filled.
The last step was sanding and polishing the surface to give it a smooth clear finish. For more detail on the sanding and polishing see the 3D printed Raspbery Pi Case where I explain the process further. The finished part came out better then expected and stands straight up on either end.
Here is the video that inspired it all: