### Tuesday: #### Safety Reminders: - Make sure you can locate PPE, fire extinguishers, and first aid kits. - No open-toed shoes, flip-flops, sandals, or heels. - Tie back long hair, secure loose clothing or jewelry. - In case of emergency, call 911 on your cell phone. - Report any broken or damaged equipment to lab staff. 3:00: <a href='../../lab/tools/index.html' target="_self">Tools, Processes, and Materials</a><br> - <b>Saw Station:</b> Use a [hand saw](https://www.youtube.com/watch?v=F5YmVHB3P5I), use the [scroll saw](https://www.youtube.com/watch?v=5_fenDdm4oQ). Use [hand files](https://www.youtube.com/watch?v=h4KaiG7CpSQ) and the [bench grinder](https://www.youtube.com/watch?v=OvW4MVvk69A). - <b>Drill Station:</b> Use a [hand drill](https://www.youtube.com/watch?v=d6qzo3LYTR4), use the [drill press](https://www.youtube.com/watch?v=Nu9tYcld7ck), and [tap a hole](https://www.youtube.com/watch?v=CWCQ-hlQvdY). - <b>Assembly Station:</b> - Measure something using micrometer, calipers, protractor, and level. - Joining: [nuts & bolts](https://youtu.be/zIGz8STM-fI), [screws](https://youtu.be/5cA9bZRHpZE), nails, and glue. - Experiment with gears, bearings, belts, pulleys. ### Reading: <p> <a href='../../lab/tools/mechanisms.html' target="_self">Mechanism design</a>, <a href='https://docs.google.com/presentation/d/1ZqWlTu3C6ChjgVlh-ZcghNG3y8bAC1Wpp0kyp3fGtFE/edit?usp=sharing'>Principles of mechanical design</a>, chapters 4 and 8 of <a href='http://mars1980.github.io/resources/making_things_move.pdf'> Making Things Move</a>. <br> <a href='https://learn.sparkfun.com/tutorials/how-to-power-a-project'>Power</a>, <a href='https://learn.sparkfun.com/tutorials/motors-and-selecting-the-right-one/dc-brush-motors---the-classic'>motors</a>, <a href='https://www.makerspaces.com/how-to-solder/'>soldering</a>. <br> Review <a href='https://learn.sparkfun.com/tutorials/voltage-current-resistance-and-ohms-law'> Ohm's Law</a> and <a href='https://learn.sparkfun.com/tutorials/analog-vs-digital'>Analog vs. Digital</a> inputs <br></p> ### Thursday: <!-- 3:30: <a href='./mechanisms.html'>Mechanism design</a> <br> --> 3:00: Assignment/Website Review <br> 3:15: <a href='https://learn.sparkfun.com/tutorials/how-to-power-a-project'>Power</a>, <a href='https://learn.sparkfun.com/tutorials/motors-and-selecting-the-right-one/dc-brush-motors---the-classic'>motors</a> / <a href='https://www.makerspaces.com/how-to-solder/'>Soldering</a>. Safety reminders: <br> <ul> <li>Wear eye protection. </li> <li>Use fume extractors.</li> <li>Don't touch hot stuff. </li> <li>Lead waste goes in lead waste tubs. </li> <li>Wash hands after soldering.</li> </ul> ### Labs: Split into two or more teams and work on building automata. <a href='../../lab/tools/automata_kit.html' target="_self">Instructions Here</a><br> - Compete to be the fastest team to assemble each of the mechanical components - Try connecting a motor to the mechanisms If there's time left, work on kinetic sculpture assignment. ### Assignment: <ul> <li>Create a kinetic sculpture. Include circuitry (i.e., a motor and a power source) to move your sculpture. </li> <!-- <li>Control the sculpture with a circuit on a breadboard that uses components in the lab (e.g., resistors, potentiometer). Use a multimeter to measure the voltages in your circuit. Use Ohm's law to calculate current through the circuit. </li> --> <!-- <li>Use the Microcontroller Analog in (ADC) to measure the voltage of a potentiometer, or other voltage-divider-based sensor.</li> <li>(Optional) Use tools like TinkerCAD to simulate your circuit and/or tools like Fusion 360 to design and simulate your mechanism.</li> --> <li> Document your work and learning. Use the photo booth in the lab to record a video of your sculpture and <a href='../../lab/website/video.html' target="_self">include at least one video/gif</a> in your documentation. </li> </ul> Some good precedents include <a href='https://sophiecwebster.github.io/PHYSCI-70/03_kinetic/index.html'>Sophie's flock of birds</a>, <!-- <a href='http://www.seansullivan.ai/physci-70/post/week3/'>Sean's drawing machine</a>, --> <a href='https://kassialove.github.io/PS70-assignments/week3.html'>Kassia's dancers</a>, <a href='https://tomkinsc.github.io/harvard-ps70/2020-02-13/'>Chris's Geneva drive</a>, and <a href='https://mturner6300.github.io/PHYSCI-70/simple-demo/01_intro/week3.html'>Megan's bird</a>. Some examples of kinetic sculptures made with common household supplies include <a href='https://silviafesta.github.io/PHYS_S-12/Assignments/assignment3.html'>Silvia's 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://azswartz.github.io/PS-70/week3/week3.html'>Avi's automatic highlighter</a>. ### Resources: <a href='https://motiongen.io/'>MotionGen</a> is one of many online tools for designing and animating mechanisms. (Though it may be a better use of time to do this in Fusion with joints and motion studies). <br> Modeling gears in Fusion360 from scratch is a useful exercise. But you can also use a script to help automate the process. (Find the Utilities tab, click the "ADD-INS" drop-down, and select "Scripts and Add-ins". Select the "Spur Gear" script, and adjust the parameters to get the gear you want.) If you need bevel gears, rack and pinions, or other more sophisticated gears, you might want to try installing the <a href='https://apps.autodesk.com/FUSION/en/Detail/Index?id=1236778940008086660&appLang=en&os=Win64'>Gear Generator plugin</a>. <br> 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. <br> Here is a fun old reference for mechanisms: <a href='http://507movements.com/' > 507 Mechanical Movements</a>, and <a href='https://www.fivehundredseven.com/'>offshoots</a>. <br> Adhesive advice at <a href='https://thistothat.com'>thistothat.com</a><br> Drilling a centered hole for a <a href='https://roberthart56.github.io/SCFAB/SC_lab/Tools/Drilling/motor_coupler.html'>motor coupler.</a><br>