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Computer-aided design

2,054 bytes added, 15:41, 4 June 2020
Flesh out the description of Types and note graphics
'''Computer-aided design''' (CAD) is the process of using software to take an idea in your head and create a digital model of it. It has applications in manufacturing, testing, and graphic design. The step immediately following CAD is [[Computer-aided manufacturing]] (CAM) in the design process. The CAD process can currently be applied to 2-Dimensional (2D) and 3-Dimensional (3D) spaces. However, researchers are currently looking at the practical uses of 4-Dimensional CAD by using Virtual Reality.  It is interesting to note the distinction by others between CAD and graphics. The definition of CAD suggests that any computer software that can be used for design should be considered a CAD software. However, many individuals will argue that software used for graphic design are not CAD because they lack features such as constrained dimensions which make precision an issue for translating to CAM. The [https://wiki.inkscape.org/wiki/index.php/CadInteroperability#:~:text=A%20difference%20between%20CAD%20and,of%20items%20in%20the%20drawing.&text=Because%20of%20these%20reasons%2C%20Inkscape,(as%20yet%20unplanned)%20additions. Inkscape Wiki] argues that, for its 2D vector graphics software, a lack of precision, the ability to dimension, and an atypical workflow prevent its software from being a traditional CAD. For DaBL's purposes, all software and methods below have the necessary requirements to be considered CAD and can be easily used on our machines for CAM.
In addition to software, there are some hardware devices that can be purchased to assist users in design, such as graphic tablets. These devices emphasize the artistic aspect of design and are not necessary for the CAD that is usually used in the Design and Build Lab. However, users of the space are more than welcome to bring their own.
==Types of 3D CAD==Both types of 3D 2D CAD are using in what is called solid modeling. Since the goal process of DaBL is specifying lines points or shapes on a surface plane for which to create a sketch. These sketches can be used to model anything from architectural plans to teach CAD simple coasters. Generally, one starts with drawing space of a specific dimension and continues to add to this plane. Some may offer a scale that will translate the extent drawing to a physical piece of manufacturing an object, solid modeling paper which is required necessary for things such as architectural plans which cannot be printed to ensure the object is bounded in space and original size. General vector graphics software can actually be createdused to create the necessary drawing for a CAM process such as laser cutting.
The obvious extension to 2D CAD is 3D CAD which adds an extra dimension to the work area. Instead of working on a flat plane, we work in a space. Many types of 3D CAD software exists which all take a different approach to how they model an object. ===Types of 3D CAD===Both types of 3D CAD are used in what is called solid modeling which formed the basis of the subject. Since the goal of DaBL is to teach CAD with the extent of manufacturing an object, solid modeling is required to ensure the object is bounded in space and can actually be created. ====Parametric CAD====
This type of modeling relies on defining features ('''parameters''') that build upon each other to create an object. For example, a 4x4mm square is defined by the parameters of length and width. If we add a third parameter for height of 4mm, we get a 4mm cube. An important note about parametric modeling is that it can be modified. If we go back and modify the length and width to be 5mm and 6mm respectively, our cube becomes a 5x6x4mm rectangle.
====Non-parametric CAD====At its core, this type of modeling does not impose relationships on any of its object bodies and relies on the user to manipulate points aspects freely. The goal is direct modeling by which you make the changes that fit your design. However, many of these types of software do possess the ability to add relationships to aspects of the design. These constraints may include making features parallel or perpendicular. This technique usually lacks the timeline feature which allows parametric techniques to build off itself.
==List of CAD software==
{| class="wikitable"
!Software
!Machine
|-
|[https://www.autodesk.com/education/free-software/eagle [Eagle (Software)|Autodesk EAGLE]]|2DCAD
|PCB Mill
|-
|[https://inkscape.org/en/release/0.92.2/ [Inkscape(Software)|Inkscape]]|2DGraphics
|PCB Mill / Laser cutter / Vinyl Cutter
|-
|[https://www.autodesk.com/products/fusion-360/students-teachers-educators?td=aexfusion [Fusion360 (software)|Autodesk Fusion 360]]
|3D Parametric
|3D Printer
|-
|[https://www.blender.org/download/ [Blender(software)|Blender]]
|3D Non-parametric / Parametric
|3D Printer / Media devices
==External links==
* [https://en.wikipedia.org/wiki/Computer-aided_design Computer-aided design] on Wikipedia *[https://en.wikipedia.org/wiki/Solid_modeling Solid modeling] on Wikipedia == References ==
* [https://en.wikipedia.org/wiki/Solid_modeling Solid modeling] on Wikipedia#

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