The objective of this lab is to connect a mechanism to a power source. Figure 3.1 The mechanical linkage developed by James Watt was his favorite invention. The linkage that Watt invented allowed the piston to exert force on the upward stroke as well as the downward movement, thereby doubling the power of the steam engine. Prior to this invention, the piston was attached with a chain. James Watt said that his favorite invention was the mechanical linkage that he developed to connect his steam engine to a pump. The process of developing a linkage to connect a power source to a mechanism is an important aspect of mechanical engineering.
Once you have a sense of the basic capabilities of the program, you can begin to consider ways in which you might connect the linear motor to the pop-up card or animated figure that you developed. Begin by completing the tutorial to familiarize yourself with the basic features of the design program. There are a number of tutorials that provide an introduction to 123D Design, including the video tutorial listed under the Resources section above. Autodesk makes 123D Design available at no cost to its users, an additional benefit. In contrast to its full-featured counterparts, 123D Design is relatively easy to master and yet is relatively full-featured. In addition to programs such as Autodesk Inventor, Autodesk also offers 3D design programs for the casual user. This is a good investment for those who plan to use these computer assisted design (CAD) programs professionally, but are less suited to the casual user. However, these are professional programs that have extensive feature sets and a commensurately steep learning curve. One advantage of Adobe Illustrator is that it can be used to design objects for both the Silhouette digital die cutter and 3D printers. Artists and graphic designers use programs such as Adobe Illustrator to design 3D printed objects. Professional engineers use programs such as Solidworks and Autodesk Inventor to design 3D printed objects. In this lab, you will design your own 3D printed components and use them to connect the linear motor to the pop-up card or animated figure that you developed in Lab 1. The previous lab provided an introduction to 3D printing through printing and assembling the parts for a linear motor.
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Creating an original design using 3D design software is analogous to writing your own document.
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stl file to a 3D printer is analogous to sending a PDF file that someone else has created to a laser printer. Design ChallengeĬonnect the linear motor to a pop-up card or animated figure. Lab 3 – 3D Fabrication: Part II Software Competencyįamiliarize yourself with the 3D design software program, 123D Design.
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