## my prototype (Spencer Emile)

1. my prototype was design to test if the door would open and close with the design i came up with
2. my research were doors that automatically open
3. material board, just because there was extra in the shop; Cylinder to open and close the door; and two carriage bolts to act as pivot point for the Cylinder
4. draft my prototype type to see if it can work in my head, do research draft some more, and then build the prototype
5. the door opened
6. the cylinder and hoses weren’t hidden that well
7. yes, i believe it was.
8. my prototype was an accurate model on what i would basically do
9. i learned that i have to try to hide the cylinder and hose better

## Math Review

Here is a short youtube playlist with explanations for some vector math and trigonometry. These concepts are useful for calculating forces and loads for complex arrangements of levers and actuators.

## Planetary Gears

Hey guys. Here are some references for planetary gears.

You can find a simple example of planetary gears here: https://youtu.be/nt1_jQM5JWA Be sure to read the entire description.

This is an army training video explaining how multiple sets of planetary gears can be combined: https://youtu.be/SrkzaQRDtuM

And just for fun, here is a video of some wooden, non-circular planetary gears: https://youtu.be/AdXZbGehwzs

## Machine Research – Ratchet Wrench

I chose the ratchet wrench for my machine research.
Machine Research

(Incase it doesn’t work on the pdf file)

Here is a link on how to rebuild a Snap-On ratchet with a repair kit. It shows the mechanisms of the tool.
Repair Video

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## Machine Research Project – Kinetic Wave Sculptures

While brainstorming for this project, I recalled a few mechanical sculptures that had fascinated me and decided to do some research on one particular type: the kinetic wave sculptures for which artist Reuben Margolin are known for (http://www.reubenmargolin.com/waves/). These sculptures are inspired by and simulate the interaction of sinusoidal waves across multiple dimensions.

The basic construction of these sculptures is as follows: a system of motors power a multi-dimensional wheel and axle system or camshaft system that is rigged to control a pulley system. This pulley system then controls the movement of the installation, which is usually 3-dimensional assembly of wooden dowels, steel bottles, or any number of materials that are uniformly fastened together and suspended via pulley strings. With each pulley calibrated to spin at a rate equivalent to some sinusoidal pattern, all parts of the assemblage move in unison while still reflecting these fluid patterns. Depending on how the assemblage is constructed, how the pulleys are arranged, and choice of wave patterns, an infinite number of possibilities can be constructed with the same fundamental idea. In some sculptures, the assemblage only moves along 1 axis (up and down, for example), in other designs, the assemblage moves about all 3 spatial axes, which creates beautiful structures that can fluidly morph into different shapes (see http://www.reubenmargolin.com/waves/YellowSpiral/yellowSpiral_video.html).

I think these sculptures are especially cool because although the basic mechanical solution for simulating waves is not complex, creative application of the idea allows for an infinite number of bespoke variations. I chose this machine because curves, waves, and gentle fluid motion has always struck me as especially beautiful. Perhaps it is because they are so fundamental to the laws of nature that they are not only seen but sensed at all times. I did my research primarily via YouTube-hopping interesting mechanical sculptures! 🙂

Here are few more links that gave me more insights:

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## The Timing Belt Spencer Emile

Here is my Machine Project, it is about the timing belt assembly. Hope you enjoy.

Cars Timing belt

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