<h3> Mechanism Design: Kinetic Art References </h3> <iframe width="937" height="527" src="https://www.youtube.com/embed/0_22x26qYPA" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><br><br> <iframe width="937" height="625" src="https://www.youtube.com/embed/Sg2U29Alfuc" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><br><br> <p> Look up artists like <a href='https://www.youtube.com/user/dreamingmachines/videos' >Arthur Ganson </a> and <a href='https://www.youtube.com/watch?v=0_22x26qYPA' >others</a>. These pieces probably took more than a few days to complete, but likely many of them started with study models made from things like cardboard and simple DC motors. </p> <iframe width="937" height="527" src="https://www.youtube.com/embed/ROP45rjvOHg" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><br><br> <iframe width="937" height="527" src="https://www.youtube.com/embed/DfznnKUwywQ" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><br><br> <iframe width="937" height="527" src="https://www.youtube.com/embed/xN9hTo3iR6A" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> <h3> Mechanism Design </h3> <p> Here is a fun old reference for mechanisms: <a href='https://books.google.com/books?vid=HARVARD:32044091965889&printsec=titlepage#v=onepage&q&f=false' > 507 Mechanical Movements</a>, with animations <a href='http://507movements.com/'> here</a>. <br> <br> <a href='http://mars1980.github.io/resources/making_things_move.pdf'>Making Things Move</a>, chapters 4 and 8. <br> <br> Use design/simulation tools for <a href='https://dynref.engr.illinois.edu/aml.html'>four-bar linkages</a> or other mechanisms. <br> <br> <iframe width="937" height="527" src="https://www.youtube.com/embed/rAktZZSBHnA" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> In this tutorial, the author uses a custom software to sketch a four-bar linkage system (you could use <a href='https://dynref.engr.illinois.edu/aml.html'>this link</a> instead). He then explains how to build a motion study using Fusion 360 to preview the motion (minute 8). <br> <br> <iframe width="937" height="530" src="https://www.youtube.com/embed/tURgE38tdRs" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> <a href='https://www.mekanizmalar.com/'><br> The Book of Mechanics of Machines</a><br> <br> <iframe width="937" height="493" src="https://www.youtube.com/embed/dPEBbcDiWNs" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> <a href='https://www.youtube.com/user/thang010146/featured'><br> Thang010146's 3200 mechanisms</a> </p> [SAW Robot](https://www.wevolver.com/specs/single.actuator.wave-like.robot)  <h3> Rapid Prototypes </h3> <p> Some examples of kinetic sculptures made with common household supplies can be seen from the summer 2020 course, <a href='https://silviafesta.github.io/PHYS_S-12/Assignments/assignment3.html'>especially Silvia's clever use of string</a>, <a href='https://michelleyl78.github.io/PHYS_S-12/04_class/04_class.html'>Michelle's method of making circular cams</a>, and <a href='https://wujibi123.github.io/PHYS_S-12/04_RapidPrototyping/index.html'>Dan's mechanism</a>. </p> <p> <img src='./linkage.jpg' alt='linkage design'> <br> <br> Here is an example of a simple four-bar mechanism made with components in our course kit. I used <a href='https://dynref.engr.illinois.edu/aml.html'>this website</a> to find the lengths of the bars. The white 3D-printed hub with a black wire prong attached forms the "crank" bar (the length of the bar is the hub's radius). The "rocker" is made with a length of red solid-core wire (twisted for extra stiffness), attached to the cardboard box with an M3 bolt and nut (there's a small loop in the wire for the bolt to pass through). Another M3 bolt and nut connect the rocker to the floating link (yellow). The "ground link" is the invisible line between the motor shaft and the M3 bolt through the cardboard. </p> <p> <video width="320" height="240" controls> <source src="./linkage.mp4" type="video/mp4"> </video> <br> </p> <img src='./ganson0.jpg' alt='ganson gear design'> <br> <br> <p>It's difficult to make very precise gears at home, but precision may be overrated. Here's an attempt to make Arthur Ganson-inspired gears using solid-core wire. I used a piece of wood from the kit (anything around this size could work) to coil the wire around. Note that there are two different white 3D printed components in the above image. One has the D-shaped hole to receive the motor shaft, the other has a hole large enough for a bearing and an M5 bolt (it's supposed to be a timing belt pulley, but we can use it to make a Ganson gear). </p> <img src='./ganson1.jpg' alt='ganson gear design'> <br> <br> <p> After pulling the wire off of the wood, I bent the coil around the 3D printed part so that it was loosely in the right position. I then threaded a different color wire through the coil, and then tightened that wire (by twisting its ends together) to cinch the coil to the 3D printed part. I then adjusted the spacing to be even. It seems to work! </p> <p> <video width="320" height="240" controls> <source src="./ganson.mp4" type="video/mp4"> </video> </p>