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Do-Over! Solids of Revolution

For my do-over blog, I thought about the prints that I have done this semester. Of all my prints, the one I liked the least was the first one. Due to my lack of experience with the software and 3D printing process, the resulting product was lackluster in my eyes. With this iteration, I wanted to take a look at the same functions I chose the first time around, and see if choosing a different domain would create an object that was more like the shape I desired. The goal was and is to create a bowl shaped object that looks good on my desk.

Previous Mistakes

My previous print was a visual representation of the approximate solid of revolution created by the two curves: \[ f(x) = 2^{.25x} - 1 \] and \[ g(x) = e^{.25x} - 1 \] The domain of the original approxmiation was from the y values of [0,1]. The shape of this graph was very wide and short making it look more like a saucer. To fix this, I took the domain from [0,11] which takes more of the shape of the region created by the curves. This will alter the ratio of the height of each washer to the inner and outer radii. There will be one additional washer in this design, and it will be much skinnier. The OnShape preview creates an object that matches the desired shape when compared to the original print. Here is a picture of the new version:


Caution in Printing

A semester's worth of experience has allowed me to pick up tricks and tips for using 3D printers. Taking advantage of an object's printing orientation has great potential to avoid using supports. This time around I will print my model upside down which will give it a steady base to print. Another thing to watch is the scaling done in the Prusa slicer. It will be important to make sure that the scale factor makes sense, and the dimensions scale correctly.

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