More CAD! (It won't be too bad though, I promise). AutoCAD becomes especially useful when making 3D drawings of objects. A full understanding of these can be quite a lot to take in, but we are going to look at a couple common types of 3D drawings: Orthographic and Isometric drawings. notes on 3D drawings: notes_3ddrawingstypes.pdf Orthographic Drawings
Isometric Drawings
Wireframe Drawings - Our first "rEal" 3d Drawing
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In just about any engineering or technical field you might go into, you have a good chance of encountering CAD (Computer-Aided Design) drawings. Simply put, this allows for highly precise digital "sketches" of structures, tools, or other parts and is especially useful for design and prototyping. We're not looking to become experts in CAD in this course, but having a basic familiarity with AutoCAD (a common name-brand CAD software which is installed on our computers) is a useful skill for anyone thinking of working in a STEM field. AutoCAD is especially useful for 3D designing, but in the spirit of crawl-walk-run we will first learn some of the basics in 2D. To do this, open AutoCAD on your computer and follow along with the following lessons. A good pacing is to plan on completing lessons 1.1-1.4 on Wednesday, 1.5-1.8 on Thursday, and then work on the project on Friday. PowerPoint notes from day 1: whatiscad.pdf Lesson 1.1 - Introduction to autocad
Lesson 1.2 - Introduction to drawing and modifying
Lesson 1.3 - Trim/extend/offset/osnaps
Lesson 1.4 - Accurate Inputs
Lesson 1.5 - Lesson 1.7
Lesson 1.8 - Adding dimensions
2d Cad project - Make your own DesignFor this project you will be putting your skills in AutoCAD to use. To do this, make any design or drawing of your choosing, as long as it meets the following conditions:
As a reminder, the mousetrap car race will occur on Tuesday (tomorrow). In addition to your completed vehicle, by the end of the day Tuesday your group will need to turn in (1) some form of design work and (2) some form of documentation. The exact nature of the design work and documentation is up to interpretation for whatever you think is appropriate as long as it has specific designs/sketches and pictures of your actual vehicle, however, if you would like some guidance on this I created a couple templates you can go off of:
Template/Example for mousetrap vehicle design work: mouse_trap_car_design_work_example.docx Template/example for mousetrap vehicle documentation: mouse_trap_car_documentation_example.docx I will be out this afternoon (I will still be in the school, just in meetings in other rooms) and so we will have a substitute. Because I will not be in the classroom and to not stress out the substitute, there will be no tools being used and as such work on the Mousetrap cars will be put on hold. Instead, you will get to work on your historical technology assignment. IF(!) your work on the mousetrap car involves no use of tools (with the exception of hot glue) you may work on your mousetrap car. Details about this historical technology project can be found under the Engineering resources tab, but I am also putting them here:
-Objective: Complete a presentation as a group of 2 or individual over a historical technology. This historical technology can be anything, such as: fire, a wind turbine, the first automobile, a fidget spinner, a steam engine, the first MAC, etc... Then, create a model or prototype of this technology. There will be no one day when everyone presents their project, but instead each student will have to present their project on one day before the semester is over. -Rubric: historyprojectrubric.pdf note: there are three parts to this project: 1. Completing a PowerPoint presentation with slides that address each of the criteria on the rubric, 2. Making a model of the technology, and 3. Presenting your project. A good goal for today will be to mostly complete the PowerPoint presentation and then we will pick up the rest another day. The second part about making a model is a new aspect added to this project. If you can get started on this feel free to, but otherwise you can save this for another day. Hope y'all have a good day and I look forward to seeing you on Friday. Sorry for the short notice on this! I read my calendar wrong and had thought I was going to be out on Friday not Thursday. If you have any questions, I am giving the substitute my phone number and they can call/text me as I will still be in the building. Starting today, we are beginning the mechanical project unit. The tentative deadline for this project will be the end of class on the following Monday (9/17). For this week, you can compete in the mousetrap car project (see guidelines in the post below) or submit a proposal for your own project. Regardless, every group will need to turn in three parts for this project:
1. A proposal (template: me_projectproposaltemplate.docx) or design sketches for a mousetrap car 2. The finished product or vehicle 3. Project documentation and a presentation Rubric: me_projectrubric.pdf Starting next week, we will begin working on our Mechanical Unit projects. One possible project will be to make a mousetrap car. Below are the general parameters to expect for this challenge.
Intro to Mechanical Engineering Video
www.youtube.com/watch?v=A1V-QQ5wFU4 Simple Machines -Simple Machines Notes: simplemachines_notes.pdf -Simple Machines Assignment: simple_machines_assignment.pdf -Further Reading on Simple Machines: review_simple_machines.pdf Basic Material Science -Machining Materials Notes: materialsscience_.pdf -Machining Materials Graphic Organizer Template: materials_graphicorganizer.pdf The three wheeled go-kart that 4th block got running was filmed for Wildcat TV, which aired today. Check out their car driving around the track and being interviewed about it on Wildcat TV (www.youtube.com/watch?v=rwdeXrvd9u0) starting at the 5:13 minute mark.
With our upcoming unit focusing on Mechanical Engineering, we are going to have the opportunity to use a number of different power tools. To properly prepare us for this, we're going to take a day to go over some important safety information about power tools.
-PowerPoint over lab safety: safety_powerpoint.pdf -Power Tool Safety video: www.powertoolinstitute.com/pti-pages/videos/Power-Tool-Safety-Video-2018/index.html -Safety Slogans: fet_3_safety_slogans.doc -OSHA power tool safety booklet: osha3080.pdf OSHA (Occupational Safety and Health Administration) is a national agency responsible for maintaining safe practices and policies in industry |
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December 2018
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